1 | /**
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2 | * @file
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3 | * LWIP HTTP server implementation
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4 | */
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5 |
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6 | /*
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7 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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8 | * All rights reserved.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without modification,
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11 | * are permitted provided that the following conditions are met:
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12 | *
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13 | * 1. Redistributions of source code must retain the above copyright notice,
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14 | * this list of conditions and the following disclaimer.
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15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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16 | * this list of conditions and the following disclaimer in the documentation
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17 | * and/or other materials provided with the distribution.
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18 | * 3. The name of the author may not be used to endorse or promote products
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19 | * derived from this software without specific prior written permission.
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20 | *
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21 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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24 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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26 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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30 | * OF SUCH DAMAGE.
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31 | *
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32 | * This file is part of the lwIP TCP/IP stack.
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33 | *
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34 | * Author: Adam Dunkels <adam@sics.se>
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35 | * Simon Goldschmidt
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36 | *
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37 | */
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38 |
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39 | /**
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40 | * @defgroup httpd HTTP server
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41 | * @ingroup apps
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42 | *
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43 | * This httpd supports for a
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44 | * rudimentary server-side-include facility which will replace tags of the form
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45 | * <!--#tag--> in any file whose extension is .shtml, .shtm or .ssi with
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46 | * strings provided by an include handler whose pointer is provided to the
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47 | * module via function http_set_ssi_handler().
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48 | * Additionally, a simple common
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49 | * gateway interface (CGI) handling mechanism has been added to allow clients
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50 | * to hook functions to particular request URIs.
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51 | *
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52 | * To enable SSI support, define label LWIP_HTTPD_SSI in lwipopts.h.
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53 | * To enable CGI support, define label LWIP_HTTPD_CGI in lwipopts.h.
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54 | *
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55 | * By default, the server assumes that HTTP headers are already present in
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56 | * each file stored in the file system. By defining LWIP_HTTPD_DYNAMIC_HEADERS in
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57 | * lwipopts.h, this behavior can be changed such that the server inserts the
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58 | * headers automatically based on the extension of the file being served. If
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59 | * this mode is used, be careful to ensure that the file system image used
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60 | * does not already contain the header information.
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61 | *
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62 | * File system images without headers can be created using the makefsfile
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63 | * tool with the -h command line option.
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64 | *
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65 | *
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66 | * Notes about valid SSI tags
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67 | * --------------------------
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68 | *
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69 | * The following assumptions are made about tags used in SSI markers:
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70 | *
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71 | * 1. No tag may contain '-' or whitespace characters within the tag name.
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72 | * 2. Whitespace is allowed between the tag leadin "<!--#" and the start of
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73 | * the tag name and between the tag name and the leadout string "-->".
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74 | * 3. The maximum tag name length is LWIP_HTTPD_MAX_TAG_NAME_LEN, currently 8 characters.
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75 | *
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76 | * Notes on CGI usage
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77 | * ------------------
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78 | *
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79 | * The simple CGI support offered here works with GET method requests only
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80 | * and can handle up to 16 parameters encoded into the URI. The handler
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81 | * function may not write directly to the HTTP output but must return a
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82 | * filename that the HTTP server will send to the browser as a response to
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83 | * the incoming CGI request.
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84 | *
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85 | *
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86 | *
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87 | * The list of supported file types is quite short, so if makefsdata complains
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88 | * about an unknown extension, make sure to add it (and its doctype) to
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89 | * the 'g_psHTTPHeaders' list.
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90 | */
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91 | #include "lwip/init.h"
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92 | #include "lwip/apps/httpd.h"
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93 | #include "lwip/debug.h"
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94 | #include "lwip/stats.h"
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95 | #include "lwip/apps/fs.h"
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96 | #include "httpd_structs.h"
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97 | #include "lwip/def.h"
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98 |
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99 | #include "lwip/altcp.h"
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100 | #include "lwip/altcp_tcp.h"
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101 | #if HTTPD_ENABLE_HTTPS
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102 | #include "lwip/altcp_tls.h"
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103 | #endif
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104 | #ifdef LWIP_HOOK_FILENAME
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105 | #include LWIP_HOOK_FILENAME
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106 | #endif
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107 | #if LWIP_HTTPD_TIMING
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108 | #include "lwip/sys.h"
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109 | #endif /* LWIP_HTTPD_TIMING */
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110 |
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111 | #include <string.h> /* memset */
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112 | #include <stdlib.h> /* atoi */
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113 | #include <stdio.h>
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114 |
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115 | #if LWIP_TCP && LWIP_CALLBACK_API
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116 |
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117 | /** Minimum length for a valid HTTP/0.9 request: "GET /\r\n" -> 7 bytes */
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118 | #define MIN_REQ_LEN 7
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119 |
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120 | #define CRLF "\r\n"
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121 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
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122 | #define HTTP11_CONNECTIONKEEPALIVE "Connection: keep-alive"
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123 | #define HTTP11_CONNECTIONKEEPALIVE2 "Connection: Keep-Alive"
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124 | #endif
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125 |
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126 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
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127 | #define HTTP_IS_DYNAMIC_FILE(hs) ((hs)->buf != NULL)
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128 | #else
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129 | #define HTTP_IS_DYNAMIC_FILE(hs) 0
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130 | #endif
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131 |
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132 | /* This defines checks whether tcp_write has to copy data or not */
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133 |
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134 | #ifndef HTTP_IS_DATA_VOLATILE
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135 | /** tcp_write does not have to copy data when sent from rom-file-system directly */
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136 | #define HTTP_IS_DATA_VOLATILE(hs) (HTTP_IS_DYNAMIC_FILE(hs) ? TCP_WRITE_FLAG_COPY : 0)
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137 | #endif
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138 | /** Default: dynamic headers are sent from ROM (non-dynamic headers are handled like file data) */
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139 | #ifndef HTTP_IS_HDR_VOLATILE
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140 | #define HTTP_IS_HDR_VOLATILE(hs, ptr) 0
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141 | #endif
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142 |
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143 | /* Return values for http_send_*() */
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144 | #define HTTP_DATA_TO_SEND_FREED 3
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145 | #define HTTP_DATA_TO_SEND_BREAK 2
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146 | #define HTTP_DATA_TO_SEND_CONTINUE 1
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147 | #define HTTP_NO_DATA_TO_SEND 0
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148 |
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149 | typedef struct {
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150 | const char *name;
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151 | u8_t shtml;
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152 | } default_filename;
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153 |
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154 | static const default_filename httpd_default_filenames[] = {
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155 | {"/index.shtml", 1 },
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156 | {"/index.ssi", 1 },
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157 | {"/index.shtm", 1 },
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158 | {"/index.html", 0 },
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159 | {"/index.htm", 0 }
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160 | };
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161 |
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162 | #define NUM_DEFAULT_FILENAMES LWIP_ARRAYSIZE(httpd_default_filenames)
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163 |
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164 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
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165 | /** HTTP request is copied here from pbufs for simple parsing */
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166 | static char httpd_req_buf[LWIP_HTTPD_MAX_REQ_LENGTH + 1];
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167 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
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168 |
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169 | #if LWIP_HTTPD_SUPPORT_POST
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170 | #if LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN > LWIP_HTTPD_MAX_REQUEST_URI_LEN
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171 | #define LWIP_HTTPD_URI_BUF_LEN LWIP_HTTPD_POST_MAX_RESPONSE_URI_LEN
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172 | #endif
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173 | #endif
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174 | #ifndef LWIP_HTTPD_URI_BUF_LEN
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175 | #define LWIP_HTTPD_URI_BUF_LEN LWIP_HTTPD_MAX_REQUEST_URI_LEN
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176 | #endif
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177 | #if LWIP_HTTPD_URI_BUF_LEN
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178 | /* Filename for response file to send when POST is finished or
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179 | * search for default files when a directory is requested. */
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180 | static char http_uri_buf[LWIP_HTTPD_URI_BUF_LEN + 1];
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181 | #endif
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182 |
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183 | #if LWIP_HTTPD_DYNAMIC_HEADERS
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184 | /* The number of individual strings that comprise the headers sent before each
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185 | * requested file.
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186 | */
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187 | #define NUM_FILE_HDR_STRINGS 5
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188 | #define HDR_STRINGS_IDX_HTTP_STATUS 0 /* e.g. "HTTP/1.0 200 OK\r\n" */
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189 | #define HDR_STRINGS_IDX_SERVER_NAME 1 /* e.g. "Server: "HTTPD_SERVER_AGENT"\r\n" */
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190 | #define HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE 2 /* e.g. "Content-Length: xy\r\n" and/or "Connection: keep-alive\r\n" */
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191 | #define HDR_STRINGS_IDX_CONTENT_LEN_NR 3 /* the byte count, when content-length is used */
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192 | #define HDR_STRINGS_IDX_CONTENT_TYPE 4 /* the content type (or default answer content type including default document) */
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193 |
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194 | /* The dynamically generated Content-Length buffer needs space for CRLF + NULL */
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195 | #define LWIP_HTTPD_MAX_CONTENT_LEN_OFFSET 3
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196 | #ifndef LWIP_HTTPD_MAX_CONTENT_LEN_SIZE
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197 | /* The dynamically generated Content-Length buffer shall be able to work with
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198 | ~953 MB (9 digits) */
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199 | #define LWIP_HTTPD_MAX_CONTENT_LEN_SIZE (9 + LWIP_HTTPD_MAX_CONTENT_LEN_OFFSET)
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200 | #endif
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201 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
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202 |
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203 | #if LWIP_HTTPD_SSI
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204 |
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205 | #define HTTPD_LAST_TAG_PART 0xFFFF
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206 |
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207 | enum tag_check_state {
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208 | TAG_NONE, /* Not processing an SSI tag */
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209 | TAG_LEADIN, /* Tag lead in "<!--#" being processed */
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210 | TAG_FOUND, /* Tag name being read, looking for lead-out start */
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211 | TAG_LEADOUT, /* Tag lead out "-->" being processed */
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212 | TAG_SENDING /* Sending tag replacement string */
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213 | };
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214 |
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215 | struct http_ssi_state {
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216 | const char *parsed; /* Pointer to the first unparsed byte in buf. */
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217 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
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218 | const char *tag_started;/* Pointer to the first opening '<' of the tag. */
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219 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG */
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220 | const char *tag_end; /* Pointer to char after the closing '>' of the tag. */
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221 | u32_t parse_left; /* Number of unparsed bytes in buf. */
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222 | u16_t tag_index; /* Counter used by tag parsing state machine */
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223 | u16_t tag_insert_len; /* Length of insert in string tag_insert */
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224 | #if LWIP_HTTPD_SSI_MULTIPART
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225 | u16_t tag_part; /* Counter passed to and changed by tag insertion function to insert multiple times */
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226 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
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227 | u8_t tag_type; /* index into http_ssi_tag_desc array */
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228 | u8_t tag_name_len; /* Length of the tag name in string tag_name */
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229 | char tag_name[LWIP_HTTPD_MAX_TAG_NAME_LEN + 1]; /* Last tag name extracted */
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230 | char tag_insert[LWIP_HTTPD_MAX_TAG_INSERT_LEN + 1]; /* Insert string for tag_name */
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231 | enum tag_check_state tag_state; /* State of the tag processor */
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232 | };
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233 |
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234 | struct http_ssi_tag_description {
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235 | const char *lead_in;
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236 | const char *lead_out;
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237 | };
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238 |
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239 | #endif /* LWIP_HTTPD_SSI */
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240 |
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241 | struct http_state {
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242 | #if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED
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243 | struct http_state *next;
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244 | #endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */
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245 | struct fs_file file_handle;
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246 | struct fs_file *handle;
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247 | const char *file; /* Pointer to first unsent byte in buf. */
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248 |
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249 | struct altcp_pcb *pcb;
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250 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
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251 | struct pbuf *req;
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252 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
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253 |
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254 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
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255 | char *buf; /* File read buffer. */
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256 | int buf_len; /* Size of file read buffer, buf. */
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257 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
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258 | u32_t left; /* Number of unsent bytes in buf. */
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259 | u8_t retries;
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260 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
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261 | u8_t keepalive;
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262 | #endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
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263 | #if LWIP_HTTPD_SSI
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264 | struct http_ssi_state *ssi;
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265 | #endif /* LWIP_HTTPD_SSI */
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266 | #if LWIP_HTTPD_CGI
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267 | char *params[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Params extracted from the request URI */
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268 | char *param_vals[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Values for each extracted param */
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269 | #endif /* LWIP_HTTPD_CGI */
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270 | #if LWIP_HTTPD_DYNAMIC_HEADERS
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271 | const char *hdrs[NUM_FILE_HDR_STRINGS]; /* HTTP headers to be sent. */
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272 | char hdr_content_len[LWIP_HTTPD_MAX_CONTENT_LEN_SIZE];
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273 | u16_t hdr_pos; /* The position of the first unsent header byte in the
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274 | current string */
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275 | u16_t hdr_index; /* The index of the hdr string currently being sent. */
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276 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
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277 | #if LWIP_HTTPD_TIMING
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278 | u32_t time_started;
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279 | #endif /* LWIP_HTTPD_TIMING */
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280 | #if LWIP_HTTPD_SUPPORT_POST
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281 | u32_t post_content_len_left;
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282 | #if LWIP_HTTPD_POST_MANUAL_WND
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283 | u32_t unrecved_bytes;
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284 | u8_t no_auto_wnd;
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285 | u8_t post_finished;
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286 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
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287 | #endif /* LWIP_HTTPD_SUPPORT_POST*/
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288 | };
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289 |
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290 | #if HTTPD_USE_MEM_POOL
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291 | LWIP_MEMPOOL_DECLARE(HTTPD_STATE, MEMP_NUM_PARALLEL_HTTPD_CONNS, sizeof(struct http_state), "HTTPD_STATE")
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292 | #if LWIP_HTTPD_SSI
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293 | LWIP_MEMPOOL_DECLARE(HTTPD_SSI_STATE, MEMP_NUM_PARALLEL_HTTPD_SSI_CONNS, sizeof(struct http_ssi_state), "HTTPD_SSI_STATE")
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294 | #define HTTP_FREE_SSI_STATE(x) LWIP_MEMPOOL_FREE(HTTPD_SSI_STATE, (x))
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295 | #define HTTP_ALLOC_SSI_STATE() (struct http_ssi_state *)LWIP_MEMPOOL_ALLOC(HTTPD_SSI_STATE)
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296 | #endif /* LWIP_HTTPD_SSI */
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297 | #define HTTP_ALLOC_HTTP_STATE() (struct http_state *)LWIP_MEMPOOL_ALLOC(HTTPD_STATE)
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298 | #define HTTP_FREE_HTTP_STATE(x) LWIP_MEMPOOL_FREE(HTTPD_STATE, (x))
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299 | #else /* HTTPD_USE_MEM_POOL */
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300 | #define HTTP_ALLOC_HTTP_STATE() (struct http_state *)mem_malloc(sizeof(struct http_state))
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301 | #define HTTP_FREE_HTTP_STATE(x) mem_free(x)
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302 | #if LWIP_HTTPD_SSI
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303 | #define HTTP_ALLOC_SSI_STATE() (struct http_ssi_state *)mem_malloc(sizeof(struct http_ssi_state))
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304 | #define HTTP_FREE_SSI_STATE(x) mem_free(x)
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305 | #endif /* LWIP_HTTPD_SSI */
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306 | #endif /* HTTPD_USE_MEM_POOL */
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307 |
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308 | static err_t http_close_conn(struct altcp_pcb *pcb, struct http_state *hs);
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309 | static err_t http_close_or_abort_conn(struct altcp_pcb *pcb, struct http_state *hs, u8_t abort_conn);
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310 | static err_t http_find_file(struct http_state *hs, const char *uri, int is_09);
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311 | static err_t http_init_file(struct http_state *hs, struct fs_file *file, int is_09, const char *uri, u8_t tag_check, char *params);
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312 | static err_t http_poll(void *arg, struct altcp_pcb *pcb);
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313 | static u8_t http_check_eof(struct altcp_pcb *pcb, struct http_state *hs);
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314 | #if LWIP_HTTPD_FS_ASYNC_READ
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315 | static void http_continue(void *connection);
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316 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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317 |
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318 | #if LWIP_HTTPD_SSI
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319 | /* SSI insert handler function pointer. */
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320 | static tSSIHandler httpd_ssi_handler;
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321 | #if !LWIP_HTTPD_SSI_RAW
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322 | static int httpd_num_tags;
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323 | static const char **httpd_tags;
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324 | #endif /* !LWIP_HTTPD_SSI_RAW */
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325 |
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326 | /* Define the available tag lead-ins and corresponding lead-outs.
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327 | * ATTENTION: for the algorithm below using this array, it is essential
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328 | * that the lead in differs in the first character! */
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329 | const struct http_ssi_tag_description http_ssi_tag_desc[] = {
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330 | {"<!--#", "-->"},
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331 | {"/*#", "*/"}
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332 | };
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333 |
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334 | #endif /* LWIP_HTTPD_SSI */
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335 |
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336 | #if LWIP_HTTPD_CGI
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337 | /* CGI handler information */
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338 | static const tCGI *httpd_cgis;
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339 | static int httpd_num_cgis;
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340 | static int http_cgi_paramcount;
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341 | #define http_cgi_params hs->params
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342 | #define http_cgi_param_vals hs->param_vals
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343 | #elif LWIP_HTTPD_CGI_SSI
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344 | static char *http_cgi_params[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Params extracted from the request URI */
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345 | static char *http_cgi_param_vals[LWIP_HTTPD_MAX_CGI_PARAMETERS]; /* Values for each extracted param */
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346 | #endif /* LWIP_HTTPD_CGI */
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347 |
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348 | #if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED
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349 | /** global list of active HTTP connections, use to kill the oldest when
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350 | running out of memory */
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351 | static struct http_state *http_connections;
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352 |
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353 | static void
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354 | http_add_connection(struct http_state *hs)
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355 | {
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356 | /* add the connection to the list */
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357 | hs->next = http_connections;
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358 | http_connections = hs;
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359 | }
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360 |
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361 | static void
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362 | http_remove_connection(struct http_state *hs)
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363 | {
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364 | /* take the connection off the list */
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365 | if (http_connections) {
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366 | if (http_connections == hs) {
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367 | http_connections = hs->next;
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368 | } else {
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369 | struct http_state *last;
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370 | for (last = http_connections; last->next != NULL; last = last->next) {
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371 | if (last->next == hs) {
|
---|
372 | last->next = hs->next;
|
---|
373 | break;
|
---|
374 | }
|
---|
375 | }
|
---|
376 | }
|
---|
377 | }
|
---|
378 | }
|
---|
379 |
|
---|
380 | static void
|
---|
381 | http_kill_oldest_connection(u8_t ssi_required)
|
---|
382 | {
|
---|
383 | struct http_state *hs = http_connections;
|
---|
384 | struct http_state *hs_free_next = NULL;
|
---|
385 | while (hs && hs->next) {
|
---|
386 | #if LWIP_HTTPD_SSI
|
---|
387 | if (ssi_required) {
|
---|
388 | if (hs->next->ssi != NULL) {
|
---|
389 | hs_free_next = hs;
|
---|
390 | }
|
---|
391 | } else
|
---|
392 | #else /* LWIP_HTTPD_SSI */
|
---|
393 | LWIP_UNUSED_ARG(ssi_required);
|
---|
394 | #endif /* LWIP_HTTPD_SSI */
|
---|
395 | {
|
---|
396 | hs_free_next = hs;
|
---|
397 | }
|
---|
398 | LWIP_ASSERT("broken list", hs != hs->next);
|
---|
399 | hs = hs->next;
|
---|
400 | }
|
---|
401 | if (hs_free_next != NULL) {
|
---|
402 | LWIP_ASSERT("hs_free_next->next != NULL", hs_free_next->next != NULL);
|
---|
403 | LWIP_ASSERT("hs_free_next->next->pcb != NULL", hs_free_next->next->pcb != NULL);
|
---|
404 | /* send RST when killing a connection because of memory shortage */
|
---|
405 | http_close_or_abort_conn(hs_free_next->next->pcb, hs_free_next->next, 1); /* this also unlinks the http_state from the list */
|
---|
406 | }
|
---|
407 | }
|
---|
408 | #else /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */
|
---|
409 |
|
---|
410 | #define http_add_connection(hs)
|
---|
411 | #define http_remove_connection(hs)
|
---|
412 |
|
---|
413 | #endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */
|
---|
414 |
|
---|
415 | #if LWIP_HTTPD_SSI
|
---|
416 | /** Allocate as struct http_ssi_state. */
|
---|
417 | static struct http_ssi_state *
|
---|
418 | http_ssi_state_alloc(void)
|
---|
419 | {
|
---|
420 | struct http_ssi_state *ret = HTTP_ALLOC_SSI_STATE();
|
---|
421 | #if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED
|
---|
422 | if (ret == NULL) {
|
---|
423 | http_kill_oldest_connection(1);
|
---|
424 | ret = HTTP_ALLOC_SSI_STATE();
|
---|
425 | }
|
---|
426 | #endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */
|
---|
427 | if (ret != NULL) {
|
---|
428 | memset(ret, 0, sizeof(struct http_ssi_state));
|
---|
429 | }
|
---|
430 | return ret;
|
---|
431 | }
|
---|
432 |
|
---|
433 | /** Free a struct http_ssi_state. */
|
---|
434 | static void
|
---|
435 | http_ssi_state_free(struct http_ssi_state *ssi)
|
---|
436 | {
|
---|
437 | if (ssi != NULL) {
|
---|
438 | HTTP_FREE_SSI_STATE(ssi);
|
---|
439 | }
|
---|
440 | }
|
---|
441 | #endif /* LWIP_HTTPD_SSI */
|
---|
442 |
|
---|
443 | /** Initialize a struct http_state.
|
---|
444 | */
|
---|
445 | static void
|
---|
446 | http_state_init(struct http_state *hs)
|
---|
447 | {
|
---|
448 | /* Initialize the structure. */
|
---|
449 | memset(hs, 0, sizeof(struct http_state));
|
---|
450 | #if LWIP_HTTPD_DYNAMIC_HEADERS
|
---|
451 | /* Indicate that the headers are not yet valid */
|
---|
452 | hs->hdr_index = NUM_FILE_HDR_STRINGS;
|
---|
453 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
454 | }
|
---|
455 |
|
---|
456 | /** Allocate a struct http_state. */
|
---|
457 | static struct http_state *
|
---|
458 | http_state_alloc(void)
|
---|
459 | {
|
---|
460 | struct http_state *ret = HTTP_ALLOC_HTTP_STATE();
|
---|
461 | #if LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED
|
---|
462 | if (ret == NULL) {
|
---|
463 | http_kill_oldest_connection(0);
|
---|
464 | ret = HTTP_ALLOC_HTTP_STATE();
|
---|
465 | }
|
---|
466 | #endif /* LWIP_HTTPD_KILL_OLD_ON_CONNECTIONS_EXCEEDED */
|
---|
467 | if (ret != NULL) {
|
---|
468 | http_state_init(ret);
|
---|
469 | http_add_connection(ret);
|
---|
470 | }
|
---|
471 | return ret;
|
---|
472 | }
|
---|
473 |
|
---|
474 | /** Free a struct http_state.
|
---|
475 | * Also frees the file data if dynamic.
|
---|
476 | */
|
---|
477 | static void
|
---|
478 | http_state_eof(struct http_state *hs)
|
---|
479 | {
|
---|
480 | if (hs->handle) {
|
---|
481 | #if LWIP_HTTPD_TIMING
|
---|
482 | u32_t ms_needed = sys_now() - hs->time_started;
|
---|
483 | u32_t needed = LWIP_MAX(1, (ms_needed / 100));
|
---|
484 | LWIP_DEBUGF(HTTPD_DEBUG_TIMING, ("httpd: needed %"U32_F" ms to send file of %d bytes -> %"U32_F" bytes/sec\n",
|
---|
485 | ms_needed, hs->handle->len, ((((u32_t)hs->handle->len) * 10) / needed)));
|
---|
486 | #endif /* LWIP_HTTPD_TIMING */
|
---|
487 | fs_close(hs->handle);
|
---|
488 | hs->handle = NULL;
|
---|
489 | }
|
---|
490 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
|
---|
491 | if (hs->buf != NULL) {
|
---|
492 | mem_free(hs->buf);
|
---|
493 | hs->buf = NULL;
|
---|
494 | }
|
---|
495 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
|
---|
496 | #if LWIP_HTTPD_SSI
|
---|
497 | if (hs->ssi) {
|
---|
498 | http_ssi_state_free(hs->ssi);
|
---|
499 | hs->ssi = NULL;
|
---|
500 | }
|
---|
501 | #endif /* LWIP_HTTPD_SSI */
|
---|
502 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
503 | if (hs->req) {
|
---|
504 | pbuf_free(hs->req);
|
---|
505 | hs->req = NULL;
|
---|
506 | }
|
---|
507 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
508 | }
|
---|
509 |
|
---|
510 | /** Free a struct http_state.
|
---|
511 | * Also frees the file data if dynamic.
|
---|
512 | */
|
---|
513 | static void
|
---|
514 | http_state_free(struct http_state *hs)
|
---|
515 | {
|
---|
516 | if (hs != NULL) {
|
---|
517 | http_state_eof(hs);
|
---|
518 | http_remove_connection(hs);
|
---|
519 | HTTP_FREE_HTTP_STATE(hs);
|
---|
520 | }
|
---|
521 | }
|
---|
522 |
|
---|
523 | /** Call tcp_write() in a loop trying smaller and smaller length
|
---|
524 | *
|
---|
525 | * @param pcb altcp_pcb to send
|
---|
526 | * @param ptr Data to send
|
---|
527 | * @param length Length of data to send (in/out: on return, contains the
|
---|
528 | * amount of data sent)
|
---|
529 | * @param apiflags directly passed to tcp_write
|
---|
530 | * @return the return value of tcp_write
|
---|
531 | */
|
---|
532 | static err_t
|
---|
533 | http_write(struct altcp_pcb *pcb, const void *ptr, u16_t *length, u8_t apiflags)
|
---|
534 | {
|
---|
535 | u16_t len, max_len;
|
---|
536 | err_t err;
|
---|
537 | LWIP_ASSERT("length != NULL", length != NULL);
|
---|
538 | len = *length;
|
---|
539 | if (len == 0) {
|
---|
540 | return ERR_OK;
|
---|
541 | }
|
---|
542 | /* We cannot send more data than space available in the send buffer. */
|
---|
543 | max_len = altcp_sndbuf(pcb);
|
---|
544 | if (max_len < len) {
|
---|
545 | len = max_len;
|
---|
546 | }
|
---|
547 | #ifdef HTTPD_MAX_WRITE_LEN
|
---|
548 | /* Additional limitation: e.g. don't enqueue more than 2*mss at once */
|
---|
549 | max_len = HTTPD_MAX_WRITE_LEN(pcb);
|
---|
550 | if (len > max_len) {
|
---|
551 | len = max_len;
|
---|
552 | }
|
---|
553 | #endif /* HTTPD_MAX_WRITE_LEN */
|
---|
554 | do {
|
---|
555 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Trying to send %d bytes\n", len));
|
---|
556 | err = altcp_write(pcb, ptr, len, apiflags);
|
---|
557 | if (err == ERR_MEM) {
|
---|
558 | if ((altcp_sndbuf(pcb) == 0) ||
|
---|
559 | (altcp_sndqueuelen(pcb) >= TCP_SND_QUEUELEN)) {
|
---|
560 | /* no need to try smaller sizes */
|
---|
561 | len = 1;
|
---|
562 | } else {
|
---|
563 | len /= 2;
|
---|
564 | }
|
---|
565 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE,
|
---|
566 | ("Send failed, trying less (%d bytes)\n", len));
|
---|
567 | }
|
---|
568 | } while ((err == ERR_MEM) && (len > 1));
|
---|
569 |
|
---|
570 | if (err == ERR_OK) {
|
---|
571 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Sent %d bytes\n", len));
|
---|
572 | *length = len;
|
---|
573 | } else {
|
---|
574 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Send failed with err %d (\"%s\")\n", err, lwip_strerr(err)));
|
---|
575 | *length = 0;
|
---|
576 | }
|
---|
577 |
|
---|
578 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
579 | /* ensure nagle is normally enabled (only disabled for persistent connections
|
---|
580 | when all data has been enqueued but the connection stays open for the next
|
---|
581 | request */
|
---|
582 | altcp_nagle_enable(pcb);
|
---|
583 | #endif
|
---|
584 |
|
---|
585 | return err;
|
---|
586 | }
|
---|
587 |
|
---|
588 | /**
|
---|
589 | * The connection shall be actively closed (using RST to close from fault states).
|
---|
590 | * Reset the sent- and recv-callbacks.
|
---|
591 | *
|
---|
592 | * @param pcb the tcp pcb to reset callbacks
|
---|
593 | * @param hs connection state to free
|
---|
594 | */
|
---|
595 | static err_t
|
---|
596 | http_close_or_abort_conn(struct altcp_pcb *pcb, struct http_state *hs, u8_t abort_conn)
|
---|
597 | {
|
---|
598 | err_t err;
|
---|
599 | LWIP_DEBUGF(HTTPD_DEBUG, ("Closing connection %p\n", (void *)pcb));
|
---|
600 |
|
---|
601 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
602 | if (hs != NULL) {
|
---|
603 | if ((hs->post_content_len_left != 0)
|
---|
604 | #if LWIP_HTTPD_POST_MANUAL_WND
|
---|
605 | || ((hs->no_auto_wnd != 0) && (hs->unrecved_bytes != 0))
|
---|
606 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
---|
607 | ) {
|
---|
608 | /* make sure the post code knows that the connection is closed */
|
---|
609 | http_uri_buf[0] = 0;
|
---|
610 | httpd_post_finished(hs, http_uri_buf, LWIP_HTTPD_URI_BUF_LEN);
|
---|
611 | }
|
---|
612 | }
|
---|
613 | #endif /* LWIP_HTTPD_SUPPORT_POST*/
|
---|
614 |
|
---|
615 |
|
---|
616 | altcp_arg(pcb, NULL);
|
---|
617 | altcp_recv(pcb, NULL);
|
---|
618 | altcp_err(pcb, NULL);
|
---|
619 | altcp_poll(pcb, NULL, 0);
|
---|
620 | altcp_sent(pcb, NULL);
|
---|
621 | if (hs != NULL) {
|
---|
622 | http_state_free(hs);
|
---|
623 | }
|
---|
624 |
|
---|
625 | if (abort_conn) {
|
---|
626 | altcp_abort(pcb);
|
---|
627 | return ERR_OK;
|
---|
628 | }
|
---|
629 | err = altcp_close(pcb);
|
---|
630 | if (err != ERR_OK) {
|
---|
631 | LWIP_DEBUGF(HTTPD_DEBUG, ("Error %d closing %p\n", err, (void *)pcb));
|
---|
632 | /* error closing, try again later in poll */
|
---|
633 | altcp_poll(pcb, http_poll, HTTPD_POLL_INTERVAL);
|
---|
634 | }
|
---|
635 | return err;
|
---|
636 | }
|
---|
637 |
|
---|
638 | /**
|
---|
639 | * The connection shall be actively closed.
|
---|
640 | * Reset the sent- and recv-callbacks.
|
---|
641 | *
|
---|
642 | * @param pcb the tcp pcb to reset callbacks
|
---|
643 | * @param hs connection state to free
|
---|
644 | */
|
---|
645 | static err_t
|
---|
646 | http_close_conn(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
647 | {
|
---|
648 | return http_close_or_abort_conn(pcb, hs, 0);
|
---|
649 | }
|
---|
650 |
|
---|
651 | /** End of file: either close the connection (Connection: close) or
|
---|
652 | * close the file (Connection: keep-alive)
|
---|
653 | */
|
---|
654 | static void
|
---|
655 | http_eof(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
656 | {
|
---|
657 | /* HTTP/1.1 persistent connection? (Not supported for SSI) */
|
---|
658 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
659 | if (hs->keepalive) {
|
---|
660 | http_remove_connection(hs);
|
---|
661 |
|
---|
662 | http_state_eof(hs);
|
---|
663 | http_state_init(hs);
|
---|
664 | /* restore state: */
|
---|
665 | hs->pcb = pcb;
|
---|
666 | hs->keepalive = 1;
|
---|
667 | http_add_connection(hs);
|
---|
668 | /* ensure nagle doesn't interfere with sending all data as fast as possible: */
|
---|
669 | altcp_nagle_disable(pcb);
|
---|
670 | } else
|
---|
671 | #endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
|
---|
672 | {
|
---|
673 | http_close_conn(pcb, hs);
|
---|
674 | }
|
---|
675 | }
|
---|
676 |
|
---|
677 | #if LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI
|
---|
678 | /**
|
---|
679 | * Extract URI parameters from the parameter-part of an URI in the form
|
---|
680 | * "test.cgi?x=y" @todo: better explanation!
|
---|
681 | * Pointers to the parameters are stored in hs->param_vals.
|
---|
682 | *
|
---|
683 | * @param hs http connection state
|
---|
684 | * @param params pointer to the NULL-terminated parameter string from the URI
|
---|
685 | * @return number of parameters extracted
|
---|
686 | */
|
---|
687 | static int
|
---|
688 | extract_uri_parameters(struct http_state *hs, char *params)
|
---|
689 | {
|
---|
690 | char *pair;
|
---|
691 | char *equals;
|
---|
692 | int loop;
|
---|
693 |
|
---|
694 | LWIP_UNUSED_ARG(hs);
|
---|
695 |
|
---|
696 | /* If we have no parameters at all, return immediately. */
|
---|
697 | if (!params || (params[0] == '\0')) {
|
---|
698 | return (0);
|
---|
699 | }
|
---|
700 |
|
---|
701 | /* Get a pointer to our first parameter */
|
---|
702 | pair = params;
|
---|
703 |
|
---|
704 | /* Parse up to LWIP_HTTPD_MAX_CGI_PARAMETERS from the passed string and ignore the
|
---|
705 | * remainder (if any) */
|
---|
706 | for (loop = 0; (loop < LWIP_HTTPD_MAX_CGI_PARAMETERS) && pair; loop++) {
|
---|
707 |
|
---|
708 | /* Save the name of the parameter */
|
---|
709 | http_cgi_params[loop] = pair;
|
---|
710 |
|
---|
711 | /* Remember the start of this name=value pair */
|
---|
712 | equals = pair;
|
---|
713 |
|
---|
714 | /* Find the start of the next name=value pair and replace the delimiter
|
---|
715 | * with a 0 to terminate the previous pair string. */
|
---|
716 | pair = strchr(pair, '&');
|
---|
717 | if (pair) {
|
---|
718 | *pair = '\0';
|
---|
719 | pair++;
|
---|
720 | } else {
|
---|
721 | /* We didn't find a new parameter so find the end of the URI and
|
---|
722 | * replace the space with a '\0' */
|
---|
723 | pair = strchr(equals, ' ');
|
---|
724 | if (pair) {
|
---|
725 | *pair = '\0';
|
---|
726 | }
|
---|
727 |
|
---|
728 | /* Revert to NULL so that we exit the loop as expected. */
|
---|
729 | pair = NULL;
|
---|
730 | }
|
---|
731 |
|
---|
732 | /* Now find the '=' in the previous pair, replace it with '\0' and save
|
---|
733 | * the parameter value string. */
|
---|
734 | equals = strchr(equals, '=');
|
---|
735 | if (equals) {
|
---|
736 | *equals = '\0';
|
---|
737 | http_cgi_param_vals[loop] = equals + 1;
|
---|
738 | } else {
|
---|
739 | http_cgi_param_vals[loop] = NULL;
|
---|
740 | }
|
---|
741 | }
|
---|
742 |
|
---|
743 | return loop;
|
---|
744 | }
|
---|
745 | #endif /* LWIP_HTTPD_CGI || LWIP_HTTPD_CGI_SSI */
|
---|
746 |
|
---|
747 | #if LWIP_HTTPD_SSI
|
---|
748 | /**
|
---|
749 | * Insert a tag (found in an shtml in the form of "<!--#tagname-->" into the file.
|
---|
750 | * The tag's name is stored in ssi->tag_name (NULL-terminated), the replacement
|
---|
751 | * should be written to hs->tag_insert (up to a length of LWIP_HTTPD_MAX_TAG_INSERT_LEN).
|
---|
752 | * The amount of data written is stored to ssi->tag_insert_len.
|
---|
753 | *
|
---|
754 | * @todo: return tag_insert_len - maybe it can be removed from struct http_state?
|
---|
755 | *
|
---|
756 | * @param hs http connection state
|
---|
757 | */
|
---|
758 | static void
|
---|
759 | get_tag_insert(struct http_state *hs)
|
---|
760 | {
|
---|
761 | #if LWIP_HTTPD_SSI_RAW
|
---|
762 | const char *tag;
|
---|
763 | #else /* LWIP_HTTPD_SSI_RAW */
|
---|
764 | int tag;
|
---|
765 | #endif /* LWIP_HTTPD_SSI_RAW */
|
---|
766 | size_t len;
|
---|
767 | struct http_ssi_state *ssi;
|
---|
768 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
769 | u16_t current_tag_part;
|
---|
770 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
771 |
|
---|
772 | LWIP_ASSERT("hs != NULL", hs != NULL);
|
---|
773 | ssi = hs->ssi;
|
---|
774 | LWIP_ASSERT("ssi != NULL", ssi != NULL);
|
---|
775 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
776 | current_tag_part = ssi->tag_part;
|
---|
777 | ssi->tag_part = HTTPD_LAST_TAG_PART;
|
---|
778 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
779 | #if LWIP_HTTPD_SSI_RAW
|
---|
780 | tag = ssi->tag_name;
|
---|
781 | #endif
|
---|
782 |
|
---|
783 | if (httpd_ssi_handler
|
---|
784 | #if !LWIP_HTTPD_SSI_RAW
|
---|
785 | && httpd_tags && httpd_num_tags
|
---|
786 | #endif /* !LWIP_HTTPD_SSI_RAW */
|
---|
787 | ) {
|
---|
788 |
|
---|
789 | /* Find this tag in the list we have been provided. */
|
---|
790 | #if LWIP_HTTPD_SSI_RAW
|
---|
791 | {
|
---|
792 | #else /* LWIP_HTTPD_SSI_RAW */
|
---|
793 | for (tag = 0; tag < httpd_num_tags; tag++) {
|
---|
794 | if (strcmp(ssi->tag_name, httpd_tags[tag]) == 0)
|
---|
795 | #endif /* LWIP_HTTPD_SSI_RAW */
|
---|
796 | {
|
---|
797 | ssi->tag_insert_len = httpd_ssi_handler(tag, ssi->tag_insert,
|
---|
798 | LWIP_HTTPD_MAX_TAG_INSERT_LEN
|
---|
799 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
800 | , current_tag_part, &ssi->tag_part
|
---|
801 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
802 | #if LWIP_HTTPD_FILE_STATE
|
---|
803 | , (hs->handle ? hs->handle->state : NULL)
|
---|
804 | #endif /* LWIP_HTTPD_FILE_STATE */
|
---|
805 | );
|
---|
806 | #if LWIP_HTTPD_SSI_RAW
|
---|
807 | if (ssi->tag_insert_len != HTTPD_SSI_TAG_UNKNOWN)
|
---|
808 | #endif /* LWIP_HTTPD_SSI_RAW */
|
---|
809 | {
|
---|
810 | return;
|
---|
811 | }
|
---|
812 | }
|
---|
813 | }
|
---|
814 | }
|
---|
815 |
|
---|
816 | /* If we drop out, we were asked to serve a page which contains tags that
|
---|
817 | * we don't have a handler for. Merely echo back the tags with an error
|
---|
818 | * marker. */
|
---|
819 | #define UNKNOWN_TAG1_TEXT "<b>***UNKNOWN TAG "
|
---|
820 | #define UNKNOWN_TAG1_LEN 18
|
---|
821 | #define UNKNOWN_TAG2_TEXT "***</b>"
|
---|
822 | #define UNKNOWN_TAG2_LEN 7
|
---|
823 | len = LWIP_MIN(sizeof(ssi->tag_name), LWIP_MIN(strlen(ssi->tag_name),
|
---|
824 | LWIP_HTTPD_MAX_TAG_INSERT_LEN - (UNKNOWN_TAG1_LEN + UNKNOWN_TAG2_LEN)));
|
---|
825 | MEMCPY(ssi->tag_insert, UNKNOWN_TAG1_TEXT, UNKNOWN_TAG1_LEN);
|
---|
826 | MEMCPY(&ssi->tag_insert[UNKNOWN_TAG1_LEN], ssi->tag_name, len);
|
---|
827 | MEMCPY(&ssi->tag_insert[UNKNOWN_TAG1_LEN + len], UNKNOWN_TAG2_TEXT, UNKNOWN_TAG2_LEN);
|
---|
828 | ssi->tag_insert[UNKNOWN_TAG1_LEN + len + UNKNOWN_TAG2_LEN] = 0;
|
---|
829 |
|
---|
830 | len = strlen(ssi->tag_insert);
|
---|
831 | LWIP_ASSERT("len <= 0xffff", len <= 0xffff);
|
---|
832 | ssi->tag_insert_len = (u16_t)len;
|
---|
833 | }
|
---|
834 | #endif /* LWIP_HTTPD_SSI */
|
---|
835 |
|
---|
836 | #if LWIP_HTTPD_DYNAMIC_HEADERS
|
---|
837 | /**
|
---|
838 | * Generate the relevant HTTP headers for the given filename and write
|
---|
839 | * them into the supplied buffer.
|
---|
840 | */
|
---|
841 | static void
|
---|
842 | get_http_headers(struct http_state *hs, const char *uri)
|
---|
843 | {
|
---|
844 | size_t content_type;
|
---|
845 | char *tmp;
|
---|
846 | char *ext;
|
---|
847 | char *vars;
|
---|
848 |
|
---|
849 | /* In all cases, the second header we send is the server identification
|
---|
850 | so set it here. */
|
---|
851 | hs->hdrs[HDR_STRINGS_IDX_SERVER_NAME] = g_psHTTPHeaderStrings[HTTP_HDR_SERVER];
|
---|
852 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] = NULL;
|
---|
853 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_NR] = NULL;
|
---|
854 |
|
---|
855 | /* Is this a normal file or the special case we use to send back the
|
---|
856 | default "404: Page not found" response? */
|
---|
857 | if (uri == NULL) {
|
---|
858 | hs->hdrs[HDR_STRINGS_IDX_HTTP_STATUS] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_FOUND];
|
---|
859 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
860 | if (hs->keepalive) {
|
---|
861 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_TYPE] = g_psHTTPHeaderStrings[DEFAULT_404_HTML_PERSISTENT];
|
---|
862 | } else
|
---|
863 | #endif
|
---|
864 | {
|
---|
865 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_TYPE] = g_psHTTPHeaderStrings[DEFAULT_404_HTML];
|
---|
866 | }
|
---|
867 |
|
---|
868 | /* Set up to send the first header string. */
|
---|
869 | hs->hdr_index = 0;
|
---|
870 | hs->hdr_pos = 0;
|
---|
871 | return;
|
---|
872 | }
|
---|
873 | /* We are dealing with a particular filename. Look for one other
|
---|
874 | special case. We assume that any filename with "404" in it must be
|
---|
875 | indicative of a 404 server error whereas all other files require
|
---|
876 | the 200 OK header. */
|
---|
877 | if (strstr(uri, "404")) {
|
---|
878 | hs->hdrs[HDR_STRINGS_IDX_HTTP_STATUS] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_FOUND];
|
---|
879 | } else if (strstr(uri, "400")) {
|
---|
880 | hs->hdrs[HDR_STRINGS_IDX_HTTP_STATUS] = g_psHTTPHeaderStrings[HTTP_HDR_BAD_REQUEST];
|
---|
881 | } else if (strstr(uri, "501")) {
|
---|
882 | hs->hdrs[HDR_STRINGS_IDX_HTTP_STATUS] = g_psHTTPHeaderStrings[HTTP_HDR_NOT_IMPL];
|
---|
883 | } else {
|
---|
884 | hs->hdrs[HDR_STRINGS_IDX_HTTP_STATUS] = g_psHTTPHeaderStrings[HTTP_HDR_OK];
|
---|
885 | }
|
---|
886 |
|
---|
887 | /* Determine if the URI has any variables and, if so, temporarily remove
|
---|
888 | them. */
|
---|
889 | vars = strchr(uri, '?');
|
---|
890 | if (vars) {
|
---|
891 | *vars = '\0';
|
---|
892 | }
|
---|
893 |
|
---|
894 | /* Get a pointer to the file extension. We find this by looking for the
|
---|
895 | last occurrence of "." in the filename passed. */
|
---|
896 | ext = NULL;
|
---|
897 | tmp = strchr(uri, '.');
|
---|
898 | while (tmp) {
|
---|
899 | ext = tmp + 1;
|
---|
900 | tmp = strchr(ext, '.');
|
---|
901 | }
|
---|
902 | if (ext != NULL) {
|
---|
903 | /* Now determine the content type and add the relevant header for that. */
|
---|
904 | for (content_type = 0; content_type < NUM_HTTP_HEADERS; content_type++) {
|
---|
905 | /* Have we found a matching extension? */
|
---|
906 | if (!lwip_stricmp(g_psHTTPHeaders[content_type].extension, ext)) {
|
---|
907 | break;
|
---|
908 | }
|
---|
909 | }
|
---|
910 | } else {
|
---|
911 | content_type = NUM_HTTP_HEADERS;
|
---|
912 | }
|
---|
913 |
|
---|
914 | /* Reinstate the parameter marker if there was one in the original URI. */
|
---|
915 | if (vars) {
|
---|
916 | *vars = '?';
|
---|
917 | }
|
---|
918 |
|
---|
919 | #if LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI
|
---|
920 | /* Does the URL passed have any file extension? If not, we assume it
|
---|
921 | is a special-case URL used for control state notification and we do
|
---|
922 | not send any HTTP headers with the response. */
|
---|
923 | if (!ext) {
|
---|
924 | /* Force the header index to a value indicating that all headers
|
---|
925 | have already been sent. */
|
---|
926 | hs->hdr_index = NUM_FILE_HDR_STRINGS;
|
---|
927 | return;
|
---|
928 | }
|
---|
929 | #endif /* LWIP_HTTPD_OMIT_HEADER_FOR_EXTENSIONLESS_URI */
|
---|
930 | /* Did we find a matching extension? */
|
---|
931 | if (content_type < NUM_HTTP_HEADERS) {
|
---|
932 | /* yes, store it */
|
---|
933 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_TYPE] = g_psHTTPHeaders[content_type].content_type;
|
---|
934 | } else if (!ext) {
|
---|
935 | /* no, no extension found -> use binary transfer to prevent the browser adding '.txt' on save */
|
---|
936 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_TYPE] = HTTP_HDR_APP;
|
---|
937 | } else {
|
---|
938 | /* No - use the default, plain text file type. */
|
---|
939 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_TYPE] = HTTP_HDR_DEFAULT_TYPE;
|
---|
940 | }
|
---|
941 | /* Set up to send the first header string. */
|
---|
942 | hs->hdr_index = 0;
|
---|
943 | hs->hdr_pos = 0;
|
---|
944 | }
|
---|
945 |
|
---|
946 | /* Add content-length header? */
|
---|
947 | static void
|
---|
948 | get_http_content_length(struct http_state *hs)
|
---|
949 | {
|
---|
950 | u8_t add_content_len = 0;
|
---|
951 |
|
---|
952 | LWIP_ASSERT("already been here?", hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] == NULL);
|
---|
953 |
|
---|
954 | add_content_len = 0;
|
---|
955 | #if LWIP_HTTPD_SSI
|
---|
956 | if (hs->ssi == NULL) /* @todo: get maximum file length from SSI */
|
---|
957 | #endif /* LWIP_HTTPD_SSI */
|
---|
958 | {
|
---|
959 | if ((hs->handle != NULL) && (hs->handle->flags & FS_FILE_FLAGS_HEADER_PERSISTENT)) {
|
---|
960 | add_content_len = 1;
|
---|
961 | }
|
---|
962 | }
|
---|
963 | if (add_content_len) {
|
---|
964 | size_t len;
|
---|
965 | lwip_itoa(hs->hdr_content_len, (size_t)LWIP_HTTPD_MAX_CONTENT_LEN_SIZE,
|
---|
966 | hs->handle->len);
|
---|
967 | len = strlen(hs->hdr_content_len);
|
---|
968 | if (len <= LWIP_HTTPD_MAX_CONTENT_LEN_SIZE - LWIP_HTTPD_MAX_CONTENT_LEN_OFFSET) {
|
---|
969 | SMEMCPY(&hs->hdr_content_len[len], CRLF, 3);
|
---|
970 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_NR] = hs->hdr_content_len;
|
---|
971 | } else {
|
---|
972 | add_content_len = 0;
|
---|
973 | }
|
---|
974 | }
|
---|
975 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
976 | if (add_content_len) {
|
---|
977 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] = g_psHTTPHeaderStrings[HTTP_HDR_KEEPALIVE_LEN];
|
---|
978 | } else {
|
---|
979 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] = g_psHTTPHeaderStrings[HTTP_HDR_CONN_CLOSE];
|
---|
980 | hs->keepalive = 0;
|
---|
981 | }
|
---|
982 | #else /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
|
---|
983 | if (add_content_len) {
|
---|
984 | hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] = g_psHTTPHeaderStrings[HTTP_HDR_CONTENT_LENGTH];
|
---|
985 | }
|
---|
986 | #endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
|
---|
987 | }
|
---|
988 |
|
---|
989 | /** Sub-function of http_send(): send dynamic headers
|
---|
990 | *
|
---|
991 | * @returns: - HTTP_NO_DATA_TO_SEND: no new data has been enqueued
|
---|
992 | * - HTTP_DATA_TO_SEND_CONTINUE: continue with sending HTTP body
|
---|
993 | * - HTTP_DATA_TO_SEND_BREAK: data has been enqueued, headers pending,
|
---|
994 | * so don't send HTTP body yet
|
---|
995 | * - HTTP_DATA_TO_SEND_FREED: http_state and pcb are already freed
|
---|
996 | */
|
---|
997 | static u8_t
|
---|
998 | http_send_headers(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
999 | {
|
---|
1000 | err_t err;
|
---|
1001 | u16_t len;
|
---|
1002 | u8_t data_to_send = HTTP_NO_DATA_TO_SEND;
|
---|
1003 | u16_t hdrlen, sendlen;
|
---|
1004 |
|
---|
1005 | if (hs->hdrs[HDR_STRINGS_IDX_CONTENT_LEN_KEEPALIVE] == NULL) {
|
---|
1006 | /* set up "content-length" and "connection:" headers */
|
---|
1007 | get_http_content_length(hs);
|
---|
1008 | }
|
---|
1009 |
|
---|
1010 | /* How much data can we send? */
|
---|
1011 | len = altcp_sndbuf(pcb);
|
---|
1012 | sendlen = len;
|
---|
1013 |
|
---|
1014 | while (len && (hs->hdr_index < NUM_FILE_HDR_STRINGS) && sendlen) {
|
---|
1015 | const void *ptr;
|
---|
1016 | u16_t old_sendlen;
|
---|
1017 | u8_t apiflags;
|
---|
1018 | /* How much do we have to send from the current header? */
|
---|
1019 | hdrlen = (u16_t)strlen(hs->hdrs[hs->hdr_index]);
|
---|
1020 |
|
---|
1021 | /* How much of this can we send? */
|
---|
1022 | sendlen = (len < (hdrlen - hs->hdr_pos)) ? len : (hdrlen - hs->hdr_pos);
|
---|
1023 |
|
---|
1024 | /* Send this amount of data or as much as we can given memory
|
---|
1025 | * constraints. */
|
---|
1026 | ptr = (const void *)(hs->hdrs[hs->hdr_index] + hs->hdr_pos);
|
---|
1027 | old_sendlen = sendlen;
|
---|
1028 | apiflags = HTTP_IS_HDR_VOLATILE(hs, ptr);
|
---|
1029 | if (hs->hdr_index == HDR_STRINGS_IDX_CONTENT_LEN_NR) {
|
---|
1030 | /* content-length is always volatile */
|
---|
1031 | apiflags |= TCP_WRITE_FLAG_COPY;
|
---|
1032 | }
|
---|
1033 | if (hs->hdr_index < NUM_FILE_HDR_STRINGS - 1) {
|
---|
1034 | apiflags |= TCP_WRITE_FLAG_MORE;
|
---|
1035 | }
|
---|
1036 | err = http_write(pcb, ptr, &sendlen, apiflags);
|
---|
1037 | if ((err == ERR_OK) && (old_sendlen != sendlen)) {
|
---|
1038 | /* Remember that we added some more data to be transmitted. */
|
---|
1039 | data_to_send = HTTP_DATA_TO_SEND_CONTINUE;
|
---|
1040 | } else if (err != ERR_OK) {
|
---|
1041 | /* special case: http_write does not try to send 1 byte */
|
---|
1042 | sendlen = 0;
|
---|
1043 | }
|
---|
1044 |
|
---|
1045 | /* Fix up the header position for the next time round. */
|
---|
1046 | hs->hdr_pos += sendlen;
|
---|
1047 | len -= sendlen;
|
---|
1048 |
|
---|
1049 | /* Have we finished sending this string? */
|
---|
1050 | if (hs->hdr_pos == hdrlen) {
|
---|
1051 | /* Yes - move on to the next one */
|
---|
1052 | hs->hdr_index++;
|
---|
1053 | /* skip headers that are NULL (not all headers are required) */
|
---|
1054 | while ((hs->hdr_index < NUM_FILE_HDR_STRINGS) &&
|
---|
1055 | (hs->hdrs[hs->hdr_index] == NULL)) {
|
---|
1056 | hs->hdr_index++;
|
---|
1057 | }
|
---|
1058 | hs->hdr_pos = 0;
|
---|
1059 | }
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 | if ((hs->hdr_index >= NUM_FILE_HDR_STRINGS) && (hs->file == NULL)) {
|
---|
1063 | /* When we are at the end of the headers, check for data to send
|
---|
1064 | * instead of waiting for ACK from remote side to continue
|
---|
1065 | * (which would happen when sending files from async read). */
|
---|
1066 | if (http_check_eof(pcb, hs)) {
|
---|
1067 | data_to_send = HTTP_DATA_TO_SEND_BREAK;
|
---|
1068 | } else {
|
---|
1069 | /* At this point, for non-keepalive connections, hs is deallocated an
|
---|
1070 | pcb is closed. */
|
---|
1071 | return HTTP_DATA_TO_SEND_FREED;
|
---|
1072 | }
|
---|
1073 | }
|
---|
1074 | /* If we get here and there are still header bytes to send, we send
|
---|
1075 | * the header information we just wrote immediately. If there are no
|
---|
1076 | * more headers to send, but we do have file data to send, drop through
|
---|
1077 | * to try to send some file data too. */
|
---|
1078 | if ((hs->hdr_index < NUM_FILE_HDR_STRINGS) || !hs->file) {
|
---|
1079 | LWIP_DEBUGF(HTTPD_DEBUG, ("tcp_output\n"));
|
---|
1080 | return HTTP_DATA_TO_SEND_BREAK;
|
---|
1081 | }
|
---|
1082 | return data_to_send;
|
---|
1083 | }
|
---|
1084 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
1085 |
|
---|
1086 | /** Sub-function of http_send(): end-of-file (or block) is reached,
|
---|
1087 | * either close the file or read the next block (if supported).
|
---|
1088 | *
|
---|
1089 | * @returns: 0 if the file is finished or no data has been read
|
---|
1090 | * 1 if the file is not finished and data has been read
|
---|
1091 | */
|
---|
1092 | static u8_t
|
---|
1093 | http_check_eof(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
1094 | {
|
---|
1095 | int bytes_left;
|
---|
1096 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
|
---|
1097 | int count;
|
---|
1098 | #ifdef HTTPD_MAX_WRITE_LEN
|
---|
1099 | int max_write_len;
|
---|
1100 | #endif /* HTTPD_MAX_WRITE_LEN */
|
---|
1101 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
|
---|
1102 |
|
---|
1103 | /* Do we have a valid file handle? */
|
---|
1104 | if (hs->handle == NULL) {
|
---|
1105 | /* No - close the connection. */
|
---|
1106 | http_eof(pcb, hs);
|
---|
1107 | return 0;
|
---|
1108 | }
|
---|
1109 | bytes_left = fs_bytes_left(hs->handle);
|
---|
1110 | if (bytes_left <= 0) {
|
---|
1111 | /* We reached the end of the file so this request is done. */
|
---|
1112 | LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n"));
|
---|
1113 | http_eof(pcb, hs);
|
---|
1114 | return 0;
|
---|
1115 | }
|
---|
1116 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
|
---|
1117 | /* Do we already have a send buffer allocated? */
|
---|
1118 | if (hs->buf) {
|
---|
1119 | /* Yes - get the length of the buffer */
|
---|
1120 | count = LWIP_MIN(hs->buf_len, bytes_left);
|
---|
1121 | } else {
|
---|
1122 | /* We don't have a send buffer so allocate one now */
|
---|
1123 | count = altcp_sndbuf(pcb);
|
---|
1124 | if (bytes_left < count) {
|
---|
1125 | count = bytes_left;
|
---|
1126 | }
|
---|
1127 | #ifdef HTTPD_MAX_WRITE_LEN
|
---|
1128 | /* Additional limitation: e.g. don't enqueue more than 2*mss at once */
|
---|
1129 | max_write_len = HTTPD_MAX_WRITE_LEN(pcb);
|
---|
1130 | if (count > max_write_len) {
|
---|
1131 | count = max_write_len;
|
---|
1132 | }
|
---|
1133 | #endif /* HTTPD_MAX_WRITE_LEN */
|
---|
1134 | do {
|
---|
1135 | hs->buf = (char *)mem_malloc((mem_size_t)count);
|
---|
1136 | if (hs->buf != NULL) {
|
---|
1137 | hs->buf_len = count;
|
---|
1138 | break;
|
---|
1139 | }
|
---|
1140 | count = count / 2;
|
---|
1141 | } while (count > 100);
|
---|
1142 |
|
---|
1143 | /* Did we get a send buffer? If not, return immediately. */
|
---|
1144 | if (hs->buf == NULL) {
|
---|
1145 | LWIP_DEBUGF(HTTPD_DEBUG, ("No buff\n"));
|
---|
1146 | return 0;
|
---|
1147 | }
|
---|
1148 | }
|
---|
1149 |
|
---|
1150 | /* Read a block of data from the file. */
|
---|
1151 | LWIP_DEBUGF(HTTPD_DEBUG, ("Trying to read %d bytes.\n", count));
|
---|
1152 |
|
---|
1153 | #if LWIP_HTTPD_FS_ASYNC_READ
|
---|
1154 | count = fs_read_async(hs->handle, hs->buf, count, http_continue, hs);
|
---|
1155 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
|
---|
1156 | count = fs_read(hs->handle, hs->buf, count);
|
---|
1157 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
|
---|
1158 | if (count < 0) {
|
---|
1159 | if (count == FS_READ_DELAYED) {
|
---|
1160 | /* Delayed read, wait for FS to unblock us */
|
---|
1161 | return 0;
|
---|
1162 | }
|
---|
1163 | /* We reached the end of the file so this request is done.
|
---|
1164 | * @todo: close here for HTTP/1.1 when reading file fails */
|
---|
1165 | LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n"));
|
---|
1166 | http_eof(pcb, hs);
|
---|
1167 | return 0;
|
---|
1168 | }
|
---|
1169 |
|
---|
1170 | /* Set up to send the block of data we just read */
|
---|
1171 | LWIP_DEBUGF(HTTPD_DEBUG, ("Read %d bytes.\n", count));
|
---|
1172 | hs->left = count;
|
---|
1173 | hs->file = hs->buf;
|
---|
1174 | #if LWIP_HTTPD_SSI
|
---|
1175 | if (hs->ssi) {
|
---|
1176 | hs->ssi->parse_left = count;
|
---|
1177 | hs->ssi->parsed = hs->buf;
|
---|
1178 | }
|
---|
1179 | #endif /* LWIP_HTTPD_SSI */
|
---|
1180 | #else /* LWIP_HTTPD_DYNAMIC_FILE_READ */
|
---|
1181 | LWIP_ASSERT("SSI and DYNAMIC_HEADERS turned off but eof not reached", 0);
|
---|
1182 | #endif /* LWIP_HTTPD_SSI || LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
1183 | return 1;
|
---|
1184 | }
|
---|
1185 |
|
---|
1186 | /** Sub-function of http_send(): This is the normal send-routine for non-ssi files
|
---|
1187 | *
|
---|
1188 | * @returns: - 1: data has been written (so call tcp_ouput)
|
---|
1189 | * - 0: no data has been written (no need to call tcp_output)
|
---|
1190 | */
|
---|
1191 | static u8_t
|
---|
1192 | http_send_data_nonssi(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
1193 | {
|
---|
1194 | err_t err;
|
---|
1195 | u16_t len;
|
---|
1196 | u8_t data_to_send = 0;
|
---|
1197 |
|
---|
1198 | /* We are not processing an SHTML file so no tag checking is necessary.
|
---|
1199 | * Just send the data as we received it from the file. */
|
---|
1200 | len = (u16_t)LWIP_MIN(hs->left, 0xffff);
|
---|
1201 |
|
---|
1202 | err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs));
|
---|
1203 | if (err == ERR_OK) {
|
---|
1204 | data_to_send = 1;
|
---|
1205 | hs->file += len;
|
---|
1206 | hs->left -= len;
|
---|
1207 | }
|
---|
1208 |
|
---|
1209 | return data_to_send;
|
---|
1210 | }
|
---|
1211 |
|
---|
1212 | #if LWIP_HTTPD_SSI
|
---|
1213 | /** Sub-function of http_send(): This is the send-routine for ssi files
|
---|
1214 | *
|
---|
1215 | * @returns: - 1: data has been written (so call tcp_ouput)
|
---|
1216 | * - 0: no data has been written (no need to call tcp_output)
|
---|
1217 | */
|
---|
1218 | static u8_t
|
---|
1219 | http_send_data_ssi(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
1220 | {
|
---|
1221 | err_t err = ERR_OK;
|
---|
1222 | u16_t len;
|
---|
1223 | u8_t data_to_send = 0;
|
---|
1224 | u8_t tag_type;
|
---|
1225 |
|
---|
1226 | struct http_ssi_state *ssi = hs->ssi;
|
---|
1227 | LWIP_ASSERT("ssi != NULL", ssi != NULL);
|
---|
1228 | /* We are processing an SHTML file so need to scan for tags and replace
|
---|
1229 | * them with insert strings. We need to be careful here since a tag may
|
---|
1230 | * straddle the boundary of two blocks read from the file and we may also
|
---|
1231 | * have to split the insert string between two tcp_write operations. */
|
---|
1232 |
|
---|
1233 | /* How much data could we send? */
|
---|
1234 | len = altcp_sndbuf(pcb);
|
---|
1235 |
|
---|
1236 | /* Do we have remaining data to send before parsing more? */
|
---|
1237 | if (ssi->parsed > hs->file) {
|
---|
1238 | len = (u16_t)LWIP_MIN(ssi->parsed - hs->file, 0xffff);
|
---|
1239 |
|
---|
1240 | err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs));
|
---|
1241 | if (err == ERR_OK) {
|
---|
1242 | data_to_send = 1;
|
---|
1243 | hs->file += len;
|
---|
1244 | hs->left -= len;
|
---|
1245 | }
|
---|
1246 |
|
---|
1247 | /* If the send buffer is full, return now. */
|
---|
1248 | if (altcp_sndbuf(pcb) == 0) {
|
---|
1249 | return data_to_send;
|
---|
1250 | }
|
---|
1251 | }
|
---|
1252 |
|
---|
1253 | LWIP_DEBUGF(HTTPD_DEBUG, ("State %d, %d left\n", ssi->tag_state, (int)ssi->parse_left));
|
---|
1254 |
|
---|
1255 | /* We have sent all the data that was already parsed so continue parsing
|
---|
1256 | * the buffer contents looking for SSI tags. */
|
---|
1257 | while (((ssi->tag_state == TAG_SENDING) || ssi->parse_left) && (err == ERR_OK)) {
|
---|
1258 | if (len == 0) {
|
---|
1259 | return data_to_send;
|
---|
1260 | }
|
---|
1261 | switch (ssi->tag_state) {
|
---|
1262 | case TAG_NONE:
|
---|
1263 | /* We are not currently processing an SSI tag so scan for the
|
---|
1264 | * start of the lead-in marker. */
|
---|
1265 | for (tag_type = 0; tag_type < LWIP_ARRAYSIZE(http_ssi_tag_desc); tag_type++) {
|
---|
1266 | if (*ssi->parsed == http_ssi_tag_desc[tag_type].lead_in[0]) {
|
---|
1267 | /* We found what could be the lead-in for a new tag so change
|
---|
1268 | * state appropriately. */
|
---|
1269 | ssi->tag_type = tag_type;
|
---|
1270 | ssi->tag_state = TAG_LEADIN;
|
---|
1271 | ssi->tag_index = 1;
|
---|
1272 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1273 | ssi->tag_started = ssi->parsed;
|
---|
1274 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG */
|
---|
1275 | break;
|
---|
1276 | }
|
---|
1277 | }
|
---|
1278 |
|
---|
1279 | /* Move on to the next character in the buffer */
|
---|
1280 | ssi->parse_left--;
|
---|
1281 | ssi->parsed++;
|
---|
1282 | break;
|
---|
1283 |
|
---|
1284 | case TAG_LEADIN:
|
---|
1285 | /* We are processing the lead-in marker, looking for the start of
|
---|
1286 | * the tag name. */
|
---|
1287 |
|
---|
1288 | /* Have we reached the end of the leadin? */
|
---|
1289 | if (http_ssi_tag_desc[ssi->tag_type].lead_in[ssi->tag_index] == 0) {
|
---|
1290 | ssi->tag_index = 0;
|
---|
1291 | ssi->tag_state = TAG_FOUND;
|
---|
1292 | } else {
|
---|
1293 | /* Have we found the next character we expect for the tag leadin? */
|
---|
1294 | if (*ssi->parsed == http_ssi_tag_desc[ssi->tag_type].lead_in[ssi->tag_index]) {
|
---|
1295 | /* Yes - move to the next one unless we have found the complete
|
---|
1296 | * leadin, in which case we start looking for the tag itself */
|
---|
1297 | ssi->tag_index++;
|
---|
1298 | } else {
|
---|
1299 | /* We found an unexpected character so this is not a tag. Move
|
---|
1300 | * back to idle state. */
|
---|
1301 | ssi->tag_state = TAG_NONE;
|
---|
1302 | }
|
---|
1303 |
|
---|
1304 | /* Move on to the next character in the buffer */
|
---|
1305 | ssi->parse_left--;
|
---|
1306 | ssi->parsed++;
|
---|
1307 | }
|
---|
1308 | break;
|
---|
1309 |
|
---|
1310 | case TAG_FOUND:
|
---|
1311 | /* We are reading the tag name, looking for the start of the
|
---|
1312 | * lead-out marker and removing any whitespace found. */
|
---|
1313 |
|
---|
1314 | /* Remove leading whitespace between the tag leading and the first
|
---|
1315 | * tag name character. */
|
---|
1316 | if ((ssi->tag_index == 0) && ((*ssi->parsed == ' ') ||
|
---|
1317 | (*ssi->parsed == '\t') || (*ssi->parsed == '\n') ||
|
---|
1318 | (*ssi->parsed == '\r'))) {
|
---|
1319 | /* Move on to the next character in the buffer */
|
---|
1320 | ssi->parse_left--;
|
---|
1321 | ssi->parsed++;
|
---|
1322 | break;
|
---|
1323 | }
|
---|
1324 |
|
---|
1325 | /* Have we found the end of the tag name? This is signalled by
|
---|
1326 | * us finding the first leadout character or whitespace */
|
---|
1327 | if ((*ssi->parsed == http_ssi_tag_desc[ssi->tag_type].lead_out[0]) ||
|
---|
1328 | (*ssi->parsed == ' ') || (*ssi->parsed == '\t') ||
|
---|
1329 | (*ssi->parsed == '\n') || (*ssi->parsed == '\r')) {
|
---|
1330 |
|
---|
1331 | if (ssi->tag_index == 0) {
|
---|
1332 | /* We read a zero length tag so ignore it. */
|
---|
1333 | ssi->tag_state = TAG_NONE;
|
---|
1334 | } else {
|
---|
1335 | /* We read a non-empty tag so go ahead and look for the
|
---|
1336 | * leadout string. */
|
---|
1337 | ssi->tag_state = TAG_LEADOUT;
|
---|
1338 | LWIP_ASSERT("ssi->tag_index <= 0xff", ssi->tag_index <= 0xff);
|
---|
1339 | ssi->tag_name_len = (u8_t)ssi->tag_index;
|
---|
1340 | ssi->tag_name[ssi->tag_index] = '\0';
|
---|
1341 | if (*ssi->parsed == http_ssi_tag_desc[ssi->tag_type].lead_out[0]) {
|
---|
1342 | ssi->tag_index = 1;
|
---|
1343 | } else {
|
---|
1344 | ssi->tag_index = 0;
|
---|
1345 | }
|
---|
1346 | }
|
---|
1347 | } else {
|
---|
1348 | /* This character is part of the tag name so save it */
|
---|
1349 | if (ssi->tag_index < LWIP_HTTPD_MAX_TAG_NAME_LEN) {
|
---|
1350 | ssi->tag_name[ssi->tag_index++] = *ssi->parsed;
|
---|
1351 | } else {
|
---|
1352 | /* The tag was too long so ignore it. */
|
---|
1353 | ssi->tag_state = TAG_NONE;
|
---|
1354 | }
|
---|
1355 | }
|
---|
1356 |
|
---|
1357 | /* Move on to the next character in the buffer */
|
---|
1358 | ssi->parse_left--;
|
---|
1359 | ssi->parsed++;
|
---|
1360 |
|
---|
1361 | break;
|
---|
1362 |
|
---|
1363 | /* We are looking for the end of the lead-out marker. */
|
---|
1364 | case TAG_LEADOUT:
|
---|
1365 | /* Remove leading whitespace between the tag leading and the first
|
---|
1366 | * tag leadout character. */
|
---|
1367 | if ((ssi->tag_index == 0) && ((*ssi->parsed == ' ') ||
|
---|
1368 | (*ssi->parsed == '\t') || (*ssi->parsed == '\n') ||
|
---|
1369 | (*ssi->parsed == '\r'))) {
|
---|
1370 | /* Move on to the next character in the buffer */
|
---|
1371 | ssi->parse_left--;
|
---|
1372 | ssi->parsed++;
|
---|
1373 | break;
|
---|
1374 | }
|
---|
1375 |
|
---|
1376 | /* Have we found the next character we expect for the tag leadout? */
|
---|
1377 | if (*ssi->parsed == http_ssi_tag_desc[ssi->tag_type].lead_out[ssi->tag_index]) {
|
---|
1378 | /* Yes - move to the next one unless we have found the complete
|
---|
1379 | * leadout, in which case we need to call the client to process
|
---|
1380 | * the tag. */
|
---|
1381 |
|
---|
1382 | /* Move on to the next character in the buffer */
|
---|
1383 | ssi->parse_left--;
|
---|
1384 | ssi->parsed++;
|
---|
1385 | ssi->tag_index++;
|
---|
1386 |
|
---|
1387 | if (http_ssi_tag_desc[ssi->tag_type].lead_out[ssi->tag_index] == 0) {
|
---|
1388 | /* Call the client to ask for the insert string for the
|
---|
1389 | * tag we just found. */
|
---|
1390 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
1391 | ssi->tag_part = 0; /* start with tag part 0 */
|
---|
1392 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
1393 | get_tag_insert(hs);
|
---|
1394 |
|
---|
1395 | /* Next time through, we are going to be sending data
|
---|
1396 | * immediately, either the end of the block we start
|
---|
1397 | * sending here or the insert string. */
|
---|
1398 | ssi->tag_index = 0;
|
---|
1399 | ssi->tag_state = TAG_SENDING;
|
---|
1400 | ssi->tag_end = ssi->parsed;
|
---|
1401 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1402 | ssi->parsed = ssi->tag_started;
|
---|
1403 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1404 |
|
---|
1405 | /* If there is any unsent data in the buffer prior to the
|
---|
1406 | * tag, we need to send it now. */
|
---|
1407 | if (ssi->tag_end > hs->file) {
|
---|
1408 | /* How much of the data can we send? */
|
---|
1409 | #if LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1410 | len = (u16_t)LWIP_MIN(ssi->tag_end - hs->file, 0xffff);
|
---|
1411 | #else /* LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1412 | /* we would include the tag in sending */
|
---|
1413 | len = (u16_t)LWIP_MIN(ssi->tag_started - hs->file, 0xffff);
|
---|
1414 | #endif /* LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1415 |
|
---|
1416 | err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs));
|
---|
1417 | if (err == ERR_OK) {
|
---|
1418 | data_to_send = 1;
|
---|
1419 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1420 | if (ssi->tag_started <= hs->file) {
|
---|
1421 | /* pretend to have sent the tag, too */
|
---|
1422 | len += (u16_t)(ssi->tag_end - ssi->tag_started);
|
---|
1423 | }
|
---|
1424 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1425 | hs->file += len;
|
---|
1426 | hs->left -= len;
|
---|
1427 | }
|
---|
1428 | }
|
---|
1429 | }
|
---|
1430 | } else {
|
---|
1431 | /* We found an unexpected character so this is not a tag. Move
|
---|
1432 | * back to idle state. */
|
---|
1433 | ssi->parse_left--;
|
---|
1434 | ssi->parsed++;
|
---|
1435 | ssi->tag_state = TAG_NONE;
|
---|
1436 | }
|
---|
1437 | break;
|
---|
1438 |
|
---|
1439 | /*
|
---|
1440 | * We have found a valid tag and are in the process of sending
|
---|
1441 | * data as a result of that discovery. We send either remaining data
|
---|
1442 | * from the file prior to the insert point or the insert string itself.
|
---|
1443 | */
|
---|
1444 | case TAG_SENDING:
|
---|
1445 | /* Do we have any remaining file data to send from the buffer prior
|
---|
1446 | * to the tag? */
|
---|
1447 | if (ssi->tag_end > hs->file) {
|
---|
1448 | /* How much of the data can we send? */
|
---|
1449 | #if LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1450 | len = (u16_t)LWIP_MIN(ssi->tag_end - hs->file, 0xffff);
|
---|
1451 | #else /* LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1452 | LWIP_ASSERT("hs->started >= hs->file", ssi->tag_started >= hs->file);
|
---|
1453 | /* we would include the tag in sending */
|
---|
1454 | len = (u16_t)LWIP_MIN(ssi->tag_started - hs->file, 0xffff);
|
---|
1455 | #endif /* LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1456 | if (len != 0) {
|
---|
1457 | err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs));
|
---|
1458 | } else {
|
---|
1459 | err = ERR_OK;
|
---|
1460 | }
|
---|
1461 | if (err == ERR_OK) {
|
---|
1462 | data_to_send = 1;
|
---|
1463 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1464 | if (ssi->tag_started <= hs->file) {
|
---|
1465 | /* pretend to have sent the tag, too */
|
---|
1466 | len += (u16_t)(ssi->tag_end - ssi->tag_started);
|
---|
1467 | }
|
---|
1468 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1469 | hs->file += len;
|
---|
1470 | hs->left -= len;
|
---|
1471 | }
|
---|
1472 | } else {
|
---|
1473 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
1474 | if (ssi->tag_index >= ssi->tag_insert_len) {
|
---|
1475 | /* Did the last SSIHandler have more to send? */
|
---|
1476 | if (ssi->tag_part != HTTPD_LAST_TAG_PART) {
|
---|
1477 | /* If so, call it again */
|
---|
1478 | ssi->tag_index = 0;
|
---|
1479 | get_tag_insert(hs);
|
---|
1480 | }
|
---|
1481 | }
|
---|
1482 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
1483 |
|
---|
1484 | /* Do we still have insert data left to send? */
|
---|
1485 | if (ssi->tag_index < ssi->tag_insert_len) {
|
---|
1486 | /* We are sending the insert string itself. How much of the
|
---|
1487 | * insert can we send? */
|
---|
1488 | len = (ssi->tag_insert_len - ssi->tag_index);
|
---|
1489 |
|
---|
1490 | /* Note that we set the copy flag here since we only have a
|
---|
1491 | * single tag insert buffer per connection. If we don't do
|
---|
1492 | * this, insert corruption can occur if more than one insert
|
---|
1493 | * is processed before we call tcp_output. */
|
---|
1494 | err = http_write(pcb, &(ssi->tag_insert[ssi->tag_index]), &len,
|
---|
1495 | HTTP_IS_TAG_VOLATILE(hs));
|
---|
1496 | if (err == ERR_OK) {
|
---|
1497 | data_to_send = 1;
|
---|
1498 | ssi->tag_index += len;
|
---|
1499 | /* Don't return here: keep on sending data */
|
---|
1500 | }
|
---|
1501 | } else {
|
---|
1502 | #if LWIP_HTTPD_SSI_MULTIPART
|
---|
1503 | if (ssi->tag_part == HTTPD_LAST_TAG_PART)
|
---|
1504 | #endif /* LWIP_HTTPD_SSI_MULTIPART */
|
---|
1505 | {
|
---|
1506 | /* We have sent all the insert data so go back to looking for
|
---|
1507 | * a new tag. */
|
---|
1508 | LWIP_DEBUGF(HTTPD_DEBUG, ("Everything sent.\n"));
|
---|
1509 | ssi->tag_index = 0;
|
---|
1510 | ssi->tag_state = TAG_NONE;
|
---|
1511 | #if !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1512 | ssi->parsed = ssi->tag_end;
|
---|
1513 | #endif /* !LWIP_HTTPD_SSI_INCLUDE_TAG*/
|
---|
1514 | }
|
---|
1515 | }
|
---|
1516 | break;
|
---|
1517 | default:
|
---|
1518 | break;
|
---|
1519 | }
|
---|
1520 | }
|
---|
1521 | }
|
---|
1522 |
|
---|
1523 | /* If we drop out of the end of the for loop, this implies we must have
|
---|
1524 | * file data to send so send it now. In TAG_SENDING state, we've already
|
---|
1525 | * handled this so skip the send if that's the case. */
|
---|
1526 | if ((ssi->tag_state != TAG_SENDING) && (ssi->parsed > hs->file)) {
|
---|
1527 | #if LWIP_HTTPD_DYNAMIC_FILE_READ && !LWIP_HTTPD_SSI_INCLUDE_TAG
|
---|
1528 | if ((ssi->tag_state != TAG_NONE) && (ssi->tag_started > ssi->tag_end)) {
|
---|
1529 | /* If we found tag on the edge of the read buffer: just throw away the first part
|
---|
1530 | (we have copied/saved everything required for parsing on later). */
|
---|
1531 | len = (u16_t)(ssi->tag_started - hs->file);
|
---|
1532 | hs->left -= (ssi->parsed - ssi->tag_started);
|
---|
1533 | ssi->parsed = ssi->tag_started;
|
---|
1534 | ssi->tag_started = hs->buf;
|
---|
1535 | } else
|
---|
1536 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ && !LWIP_HTTPD_SSI_INCLUDE_TAG */
|
---|
1537 | {
|
---|
1538 | len = (u16_t)LWIP_MIN(ssi->parsed - hs->file, 0xffff);
|
---|
1539 | }
|
---|
1540 |
|
---|
1541 | err = http_write(pcb, hs->file, &len, HTTP_IS_DATA_VOLATILE(hs));
|
---|
1542 | if (err == ERR_OK) {
|
---|
1543 | data_to_send = 1;
|
---|
1544 | hs->file += len;
|
---|
1545 | hs->left -= len;
|
---|
1546 | }
|
---|
1547 | }
|
---|
1548 | return data_to_send;
|
---|
1549 | }
|
---|
1550 | #endif /* LWIP_HTTPD_SSI */
|
---|
1551 |
|
---|
1552 | /**
|
---|
1553 | * Try to send more data on this pcb.
|
---|
1554 | *
|
---|
1555 | * @param pcb the pcb to send data
|
---|
1556 | * @param hs connection state
|
---|
1557 | */
|
---|
1558 | static u8_t
|
---|
1559 | http_send(struct altcp_pcb *pcb, struct http_state *hs)
|
---|
1560 | {
|
---|
1561 | u8_t data_to_send = HTTP_NO_DATA_TO_SEND;
|
---|
1562 |
|
---|
1563 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_send: pcb=%p hs=%p left=%d\n", (void *)pcb,
|
---|
1564 | (void *)hs, hs != NULL ? (int)hs->left : 0));
|
---|
1565 |
|
---|
1566 | #if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND
|
---|
1567 | if (hs->unrecved_bytes != 0) {
|
---|
1568 | return 0;
|
---|
1569 | }
|
---|
1570 | #endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1571 |
|
---|
1572 | /* If we were passed a NULL state structure pointer, ignore the call. */
|
---|
1573 | if (hs == NULL) {
|
---|
1574 | return 0;
|
---|
1575 | }
|
---|
1576 |
|
---|
1577 | #if LWIP_HTTPD_FS_ASYNC_READ
|
---|
1578 | /* Check if we are allowed to read from this file.
|
---|
1579 | (e.g. SSI might want to delay sending until data is available) */
|
---|
1580 | if (!fs_is_file_ready(hs->handle, http_continue, hs)) {
|
---|
1581 | return 0;
|
---|
1582 | }
|
---|
1583 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
|
---|
1584 |
|
---|
1585 | #if LWIP_HTTPD_DYNAMIC_HEADERS
|
---|
1586 | /* Do we have any more header data to send for this file? */
|
---|
1587 | if (hs->hdr_index < NUM_FILE_HDR_STRINGS) {
|
---|
1588 | data_to_send = http_send_headers(pcb, hs);
|
---|
1589 | if ((data_to_send == HTTP_DATA_TO_SEND_FREED) ||
|
---|
1590 | ((data_to_send != HTTP_DATA_TO_SEND_CONTINUE) &&
|
---|
1591 | (hs->hdr_index < NUM_FILE_HDR_STRINGS))) {
|
---|
1592 | return data_to_send;
|
---|
1593 | }
|
---|
1594 | }
|
---|
1595 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
1596 |
|
---|
1597 | /* Have we run out of file data to send? If so, we need to read the next
|
---|
1598 | * block from the file. */
|
---|
1599 | if (hs->left == 0) {
|
---|
1600 | if (!http_check_eof(pcb, hs)) {
|
---|
1601 | return 0;
|
---|
1602 | }
|
---|
1603 | }
|
---|
1604 |
|
---|
1605 | #if LWIP_HTTPD_SSI
|
---|
1606 | if (hs->ssi) {
|
---|
1607 | data_to_send = http_send_data_ssi(pcb, hs);
|
---|
1608 | } else
|
---|
1609 | #endif /* LWIP_HTTPD_SSI */
|
---|
1610 | {
|
---|
1611 | data_to_send = http_send_data_nonssi(pcb, hs);
|
---|
1612 | }
|
---|
1613 |
|
---|
1614 | if ((hs->left == 0) && (fs_bytes_left(hs->handle) <= 0)) {
|
---|
1615 | /* We reached the end of the file so this request is done.
|
---|
1616 | * This adds the FIN flag right into the last data segment. */
|
---|
1617 | LWIP_DEBUGF(HTTPD_DEBUG, ("End of file.\n"));
|
---|
1618 | http_eof(pcb, hs);
|
---|
1619 | return 0;
|
---|
1620 | }
|
---|
1621 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("send_data end.\n"));
|
---|
1622 | return data_to_send;
|
---|
1623 | }
|
---|
1624 |
|
---|
1625 | #if LWIP_HTTPD_SUPPORT_EXTSTATUS
|
---|
1626 | /** Initialize a http connection with a file to send for an error message
|
---|
1627 | *
|
---|
1628 | * @param hs http connection state
|
---|
1629 | * @param error_nr HTTP error number
|
---|
1630 | * @return ERR_OK if file was found and hs has been initialized correctly
|
---|
1631 | * another err_t otherwise
|
---|
1632 | */
|
---|
1633 | static err_t
|
---|
1634 | http_find_error_file(struct http_state *hs, u16_t error_nr)
|
---|
1635 | {
|
---|
1636 | const char *uri, *uri1, *uri2, *uri3;
|
---|
1637 |
|
---|
1638 | if (error_nr == 501) {
|
---|
1639 | uri1 = "/501.html";
|
---|
1640 | uri2 = "/501.htm";
|
---|
1641 | uri3 = "/501.shtml";
|
---|
1642 | } else {
|
---|
1643 | /* 400 (bad request is the default) */
|
---|
1644 | uri1 = "/400.html";
|
---|
1645 | uri2 = "/400.htm";
|
---|
1646 | uri3 = "/400.shtml";
|
---|
1647 | }
|
---|
1648 | if (fs_open(&hs->file_handle, uri1) == ERR_OK) {
|
---|
1649 | uri = uri1;
|
---|
1650 | } else if (fs_open(&hs->file_handle, uri2) == ERR_OK) {
|
---|
1651 | uri = uri2;
|
---|
1652 | } else if (fs_open(&hs->file_handle, uri3) == ERR_OK) {
|
---|
1653 | uri = uri3;
|
---|
1654 | } else {
|
---|
1655 | LWIP_DEBUGF(HTTPD_DEBUG, ("Error page for error %"U16_F" not found\n",
|
---|
1656 | error_nr));
|
---|
1657 | return ERR_ARG;
|
---|
1658 | }
|
---|
1659 | return http_init_file(hs, &hs->file_handle, 0, uri, 0, NULL);
|
---|
1660 | }
|
---|
1661 | #else /* LWIP_HTTPD_SUPPORT_EXTSTATUS */
|
---|
1662 | #define http_find_error_file(hs, error_nr) ERR_ARG
|
---|
1663 | #endif /* LWIP_HTTPD_SUPPORT_EXTSTATUS */
|
---|
1664 |
|
---|
1665 | /**
|
---|
1666 | * Get the file struct for a 404 error page.
|
---|
1667 | * Tries some file names and returns NULL if none found.
|
---|
1668 | *
|
---|
1669 | * @param uri pointer that receives the actual file name URI
|
---|
1670 | * @return file struct for the error page or NULL no matching file was found
|
---|
1671 | */
|
---|
1672 | static struct fs_file *
|
---|
1673 | http_get_404_file(struct http_state *hs, const char **uri)
|
---|
1674 | {
|
---|
1675 | err_t err;
|
---|
1676 |
|
---|
1677 | *uri = "/404.html";
|
---|
1678 | err = fs_open(&hs->file_handle, *uri);
|
---|
1679 | if (err != ERR_OK) {
|
---|
1680 | /* 404.html doesn't exist. Try 404.htm instead. */
|
---|
1681 | *uri = "/404.htm";
|
---|
1682 | err = fs_open(&hs->file_handle, *uri);
|
---|
1683 | if (err != ERR_OK) {
|
---|
1684 | /* 404.htm doesn't exist either. Try 404.shtml instead. */
|
---|
1685 | *uri = "/404.shtml";
|
---|
1686 | err = fs_open(&hs->file_handle, *uri);
|
---|
1687 | if (err != ERR_OK) {
|
---|
1688 | /* 404.htm doesn't exist either. Indicate to the caller that it should
|
---|
1689 | * send back a default 404 page.
|
---|
1690 | */
|
---|
1691 | *uri = NULL;
|
---|
1692 | return NULL;
|
---|
1693 | }
|
---|
1694 | }
|
---|
1695 | }
|
---|
1696 |
|
---|
1697 | return &hs->file_handle;
|
---|
1698 | }
|
---|
1699 |
|
---|
1700 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
1701 | static err_t
|
---|
1702 | http_handle_post_finished(struct http_state *hs)
|
---|
1703 | {
|
---|
1704 | #if LWIP_HTTPD_POST_MANUAL_WND
|
---|
1705 | /* Prevent multiple calls to httpd_post_finished, since it might have already
|
---|
1706 | been called before from httpd_post_data_recved(). */
|
---|
1707 | if (hs->post_finished) {
|
---|
1708 | return ERR_OK;
|
---|
1709 | }
|
---|
1710 | hs->post_finished = 1;
|
---|
1711 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1712 | /* application error or POST finished */
|
---|
1713 | /* NULL-terminate the buffer */
|
---|
1714 | http_uri_buf[0] = 0;
|
---|
1715 | httpd_post_finished(hs, http_uri_buf, LWIP_HTTPD_URI_BUF_LEN);
|
---|
1716 | return http_find_file(hs, http_uri_buf, 0);
|
---|
1717 | }
|
---|
1718 |
|
---|
1719 | /** Pass received POST body data to the application and correctly handle
|
---|
1720 | * returning a response document or closing the connection.
|
---|
1721 | * ATTENTION: The application is responsible for the pbuf now, so don't free it!
|
---|
1722 | *
|
---|
1723 | * @param hs http connection state
|
---|
1724 | * @param p pbuf to pass to the application
|
---|
1725 | * @return ERR_OK if passed successfully, another err_t if the response file
|
---|
1726 | * hasn't been found (after POST finished)
|
---|
1727 | */
|
---|
1728 | static err_t
|
---|
1729 | http_post_rxpbuf(struct http_state *hs, struct pbuf *p)
|
---|
1730 | {
|
---|
1731 | err_t err;
|
---|
1732 |
|
---|
1733 | if (p != NULL) {
|
---|
1734 | /* adjust remaining Content-Length */
|
---|
1735 | if (hs->post_content_len_left < p->tot_len) {
|
---|
1736 | hs->post_content_len_left = 0;
|
---|
1737 | } else {
|
---|
1738 | hs->post_content_len_left -= p->tot_len;
|
---|
1739 | }
|
---|
1740 | }
|
---|
1741 | #if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND
|
---|
1742 | /* prevent connection being closed if httpd_post_data_recved() is called nested */
|
---|
1743 | hs->unrecved_bytes++;
|
---|
1744 | #endif
|
---|
1745 | if (p != NULL) {
|
---|
1746 | err = httpd_post_receive_data(hs, p);
|
---|
1747 | } else {
|
---|
1748 | err = ERR_OK;
|
---|
1749 | }
|
---|
1750 | #if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND
|
---|
1751 | hs->unrecved_bytes--;
|
---|
1752 | #endif
|
---|
1753 | if (err != ERR_OK) {
|
---|
1754 | /* Ignore remaining content in case of application error */
|
---|
1755 | hs->post_content_len_left = 0;
|
---|
1756 | }
|
---|
1757 | if (hs->post_content_len_left == 0) {
|
---|
1758 | #if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND
|
---|
1759 | if (hs->unrecved_bytes != 0) {
|
---|
1760 | return ERR_OK;
|
---|
1761 | }
|
---|
1762 | #endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1763 | /* application error or POST finished */
|
---|
1764 | return http_handle_post_finished(hs);
|
---|
1765 | }
|
---|
1766 |
|
---|
1767 | return ERR_OK;
|
---|
1768 | }
|
---|
1769 |
|
---|
1770 | /** Handle a post request. Called from http_parse_request when method 'POST'
|
---|
1771 | * is found.
|
---|
1772 | *
|
---|
1773 | * @param p The input pbuf (containing the POST header and body).
|
---|
1774 | * @param hs The http connection state.
|
---|
1775 | * @param data HTTP request (header and part of body) from input pbuf(s).
|
---|
1776 | * @param data_len Size of 'data'.
|
---|
1777 | * @param uri The HTTP URI parsed from input pbuf(s).
|
---|
1778 | * @param uri_end Pointer to the end of 'uri' (here, the rest of the HTTP
|
---|
1779 | * header starts).
|
---|
1780 | * @return ERR_OK: POST correctly parsed and accepted by the application.
|
---|
1781 | * ERR_INPROGRESS: POST not completely parsed (no error yet)
|
---|
1782 | * another err_t: Error parsing POST or denied by the application
|
---|
1783 | */
|
---|
1784 | static err_t
|
---|
1785 | http_post_request(struct pbuf *inp, struct http_state *hs,
|
---|
1786 | char *data, u16_t data_len, char *uri, char *uri_end)
|
---|
1787 | {
|
---|
1788 | err_t err;
|
---|
1789 | /* search for end-of-header (first double-CRLF) */
|
---|
1790 | char *crlfcrlf = lwip_strnstr(uri_end + 1, CRLF CRLF, data_len - (uri_end + 1 - data));
|
---|
1791 |
|
---|
1792 | if (crlfcrlf != NULL) {
|
---|
1793 | /* search for "Content-Length: " */
|
---|
1794 | #define HTTP_HDR_CONTENT_LEN "Content-Length: "
|
---|
1795 | #define HTTP_HDR_CONTENT_LEN_LEN 16
|
---|
1796 | #define HTTP_HDR_CONTENT_LEN_DIGIT_MAX_LEN 10
|
---|
1797 | char *scontent_len = lwip_strnstr(uri_end + 1, HTTP_HDR_CONTENT_LEN, crlfcrlf - (uri_end + 1));
|
---|
1798 | if (scontent_len != NULL) {
|
---|
1799 | char *scontent_len_end = lwip_strnstr(scontent_len + HTTP_HDR_CONTENT_LEN_LEN, CRLF, HTTP_HDR_CONTENT_LEN_DIGIT_MAX_LEN);
|
---|
1800 | if (scontent_len_end != NULL) {
|
---|
1801 | int content_len;
|
---|
1802 | char *content_len_num = scontent_len + HTTP_HDR_CONTENT_LEN_LEN;
|
---|
1803 | content_len = atoi(content_len_num);
|
---|
1804 | if (content_len == 0) {
|
---|
1805 | /* if atoi returns 0 on error, fix this */
|
---|
1806 | if ((content_len_num[0] != '0') || (content_len_num[1] != '\r')) {
|
---|
1807 | content_len = -1;
|
---|
1808 | }
|
---|
1809 | }
|
---|
1810 | if (content_len >= 0) {
|
---|
1811 | /* adjust length of HTTP header passed to application */
|
---|
1812 | const char *hdr_start_after_uri = uri_end + 1;
|
---|
1813 | u16_t hdr_len = (u16_t)LWIP_MIN(data_len, crlfcrlf + 4 - data);
|
---|
1814 | u16_t hdr_data_len = (u16_t)LWIP_MIN(data_len, crlfcrlf + 4 - hdr_start_after_uri);
|
---|
1815 | u8_t post_auto_wnd = 1;
|
---|
1816 | http_uri_buf[0] = 0;
|
---|
1817 | /* trim http header */
|
---|
1818 | *crlfcrlf = 0;
|
---|
1819 | err = httpd_post_begin(hs, uri, hdr_start_after_uri, hdr_data_len, content_len,
|
---|
1820 | http_uri_buf, LWIP_HTTPD_URI_BUF_LEN, &post_auto_wnd);
|
---|
1821 | if (err == ERR_OK) {
|
---|
1822 | /* try to pass in data of the first pbuf(s) */
|
---|
1823 | struct pbuf *q = inp;
|
---|
1824 | u16_t start_offset = hdr_len;
|
---|
1825 | #if LWIP_HTTPD_POST_MANUAL_WND
|
---|
1826 | hs->no_auto_wnd = !post_auto_wnd;
|
---|
1827 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1828 | /* set the Content-Length to be received for this POST */
|
---|
1829 | hs->post_content_len_left = (u32_t)content_len;
|
---|
1830 |
|
---|
1831 | /* get to the pbuf where the body starts */
|
---|
1832 | while ((q != NULL) && (q->len <= start_offset)) {
|
---|
1833 | start_offset -= q->len;
|
---|
1834 | q = q->next;
|
---|
1835 | }
|
---|
1836 | if (q != NULL) {
|
---|
1837 | /* hide the remaining HTTP header */
|
---|
1838 | pbuf_remove_header(q, start_offset);
|
---|
1839 | #if LWIP_HTTPD_POST_MANUAL_WND
|
---|
1840 | if (!post_auto_wnd) {
|
---|
1841 | /* already tcp_recved() this data... */
|
---|
1842 | hs->unrecved_bytes = q->tot_len;
|
---|
1843 | }
|
---|
1844 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1845 | pbuf_ref(q);
|
---|
1846 | return http_post_rxpbuf(hs, q);
|
---|
1847 | } else if (hs->post_content_len_left == 0) {
|
---|
1848 | q = pbuf_alloc(PBUF_RAW, 0, PBUF_REF);
|
---|
1849 | return http_post_rxpbuf(hs, q);
|
---|
1850 | } else {
|
---|
1851 | return ERR_OK;
|
---|
1852 | }
|
---|
1853 | } else {
|
---|
1854 | /* return file passed from application */
|
---|
1855 | return http_find_file(hs, http_uri_buf, 0);
|
---|
1856 | }
|
---|
1857 | } else {
|
---|
1858 | LWIP_DEBUGF(HTTPD_DEBUG, ("POST received invalid Content-Length: %s\n",
|
---|
1859 | content_len_num));
|
---|
1860 | return ERR_ARG;
|
---|
1861 | }
|
---|
1862 | }
|
---|
1863 | }
|
---|
1864 | /* If we come here, headers are fully received (double-crlf), but Content-Length
|
---|
1865 | was not included. Since this is currently the only supported method, we have
|
---|
1866 | to fail in this case! */
|
---|
1867 | LWIP_DEBUGF(HTTPD_DEBUG, ("Error when parsing Content-Length\n"));
|
---|
1868 | return ERR_ARG;
|
---|
1869 | }
|
---|
1870 | /* if we come here, the POST is incomplete */
|
---|
1871 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
1872 | return ERR_INPROGRESS;
|
---|
1873 | #else /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
1874 | return ERR_ARG;
|
---|
1875 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
1876 | }
|
---|
1877 |
|
---|
1878 | #if LWIP_HTTPD_POST_MANUAL_WND
|
---|
1879 | /**
|
---|
1880 | * @ingroup httpd
|
---|
1881 | * A POST implementation can call this function to update the TCP window.
|
---|
1882 | * This can be used to throttle data reception (e.g. when received data is
|
---|
1883 | * programmed to flash and data is received faster than programmed).
|
---|
1884 | *
|
---|
1885 | * @param connection A connection handle passed to httpd_post_begin for which
|
---|
1886 | * httpd_post_finished has *NOT* been called yet!
|
---|
1887 | * @param recved_len Length of data received (for window update)
|
---|
1888 | */
|
---|
1889 | void httpd_post_data_recved(void *connection, u16_t recved_len)
|
---|
1890 | {
|
---|
1891 | struct http_state *hs = (struct http_state *)connection;
|
---|
1892 | if (hs != NULL) {
|
---|
1893 | if (hs->no_auto_wnd) {
|
---|
1894 | u16_t len = recved_len;
|
---|
1895 | if (hs->unrecved_bytes >= recved_len) {
|
---|
1896 | hs->unrecved_bytes -= recved_len;
|
---|
1897 | } else {
|
---|
1898 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_LEVEL_WARNING, ("httpd_post_data_recved: recved_len too big\n"));
|
---|
1899 | len = (u16_t)hs->unrecved_bytes;
|
---|
1900 | hs->unrecved_bytes = 0;
|
---|
1901 | }
|
---|
1902 | if (hs->pcb != NULL) {
|
---|
1903 | if (len != 0) {
|
---|
1904 | altcp_recved(hs->pcb, len);
|
---|
1905 | }
|
---|
1906 | if ((hs->post_content_len_left == 0) && (hs->unrecved_bytes == 0)) {
|
---|
1907 | /* finished handling POST */
|
---|
1908 | http_handle_post_finished(hs);
|
---|
1909 | http_send(hs->pcb, hs);
|
---|
1910 | }
|
---|
1911 | }
|
---|
1912 | }
|
---|
1913 | }
|
---|
1914 | }
|
---|
1915 | #endif /* LWIP_HTTPD_POST_MANUAL_WND */
|
---|
1916 |
|
---|
1917 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
1918 |
|
---|
1919 | #if LWIP_HTTPD_FS_ASYNC_READ
|
---|
1920 | /** Try to send more data if file has been blocked before
|
---|
1921 | * This is a callback function passed to fs_read_async().
|
---|
1922 | */
|
---|
1923 | static void
|
---|
1924 | http_continue(void *connection)
|
---|
1925 | {
|
---|
1926 | struct http_state *hs = (struct http_state *)connection;
|
---|
1927 | LWIP_ASSERT_CORE_LOCKED();
|
---|
1928 | if (hs && (hs->pcb) && (hs->handle)) {
|
---|
1929 | LWIP_ASSERT("hs->pcb != NULL", hs->pcb != NULL);
|
---|
1930 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("httpd_continue: try to send more data\n"));
|
---|
1931 | if (http_send(hs->pcb, hs)) {
|
---|
1932 | /* If we wrote anything to be sent, go ahead and send it now. */
|
---|
1933 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("tcp_output\n"));
|
---|
1934 | altcp_output(hs->pcb);
|
---|
1935 | }
|
---|
1936 | }
|
---|
1937 | }
|
---|
1938 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
|
---|
1939 |
|
---|
1940 | /**
|
---|
1941 | * When data has been received in the correct state, try to parse it
|
---|
1942 | * as a HTTP request.
|
---|
1943 | *
|
---|
1944 | * @param inp the received pbuf
|
---|
1945 | * @param hs the connection state
|
---|
1946 | * @param pcb the altcp_pcb which received this packet
|
---|
1947 | * @return ERR_OK if request was OK and hs has been initialized correctly
|
---|
1948 | * ERR_INPROGRESS if request was OK so far but not fully received
|
---|
1949 | * another err_t otherwise
|
---|
1950 | */
|
---|
1951 | static err_t
|
---|
1952 | http_parse_request(struct pbuf *inp, struct http_state *hs, struct altcp_pcb *pcb)
|
---|
1953 | {
|
---|
1954 | char *data;
|
---|
1955 | char *crlf;
|
---|
1956 | u16_t data_len;
|
---|
1957 | struct pbuf *p = inp;
|
---|
1958 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
1959 | u16_t clen;
|
---|
1960 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
1961 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
1962 | err_t err;
|
---|
1963 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
1964 |
|
---|
1965 | LWIP_UNUSED_ARG(pcb); /* only used for post */
|
---|
1966 | LWIP_ASSERT("p != NULL", p != NULL);
|
---|
1967 | LWIP_ASSERT("hs != NULL", hs != NULL);
|
---|
1968 |
|
---|
1969 | if ((hs->handle != NULL) || (hs->file != NULL)) {
|
---|
1970 | LWIP_DEBUGF(HTTPD_DEBUG, ("Received data while sending a file\n"));
|
---|
1971 | /* already sending a file */
|
---|
1972 | /* @todo: abort? */
|
---|
1973 | return ERR_USE;
|
---|
1974 | }
|
---|
1975 |
|
---|
1976 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
1977 |
|
---|
1978 | LWIP_DEBUGF(HTTPD_DEBUG, ("Received %"U16_F" bytes\n", p->tot_len));
|
---|
1979 |
|
---|
1980 | /* first check allowed characters in this pbuf? */
|
---|
1981 |
|
---|
1982 | /* enqueue the pbuf */
|
---|
1983 | if (hs->req == NULL) {
|
---|
1984 | LWIP_DEBUGF(HTTPD_DEBUG, ("First pbuf\n"));
|
---|
1985 | hs->req = p;
|
---|
1986 | } else {
|
---|
1987 | LWIP_DEBUGF(HTTPD_DEBUG, ("pbuf enqueued\n"));
|
---|
1988 | pbuf_cat(hs->req, p);
|
---|
1989 | }
|
---|
1990 | /* increase pbuf ref counter as it is freed when we return but we want to
|
---|
1991 | keep it on the req list */
|
---|
1992 | pbuf_ref(p);
|
---|
1993 |
|
---|
1994 | if (hs->req->next != NULL) {
|
---|
1995 | data_len = LWIP_MIN(hs->req->tot_len, LWIP_HTTPD_MAX_REQ_LENGTH);
|
---|
1996 | pbuf_copy_partial(hs->req, httpd_req_buf, data_len, 0);
|
---|
1997 | data = httpd_req_buf;
|
---|
1998 | } else
|
---|
1999 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
2000 | {
|
---|
2001 | data = (char *)p->payload;
|
---|
2002 | data_len = p->len;
|
---|
2003 | if (p->len != p->tot_len) {
|
---|
2004 | LWIP_DEBUGF(HTTPD_DEBUG, ("Warning: incomplete header due to chained pbufs\n"));
|
---|
2005 | }
|
---|
2006 | }
|
---|
2007 |
|
---|
2008 | /* received enough data for minimal request? */
|
---|
2009 | if (data_len >= MIN_REQ_LEN) {
|
---|
2010 | /* wait for CRLF before parsing anything */
|
---|
2011 | crlf = lwip_strnstr(data, CRLF, data_len);
|
---|
2012 | if (crlf != NULL) {
|
---|
2013 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2014 | int is_post = 0;
|
---|
2015 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2016 | int is_09 = 0;
|
---|
2017 | char *sp1, *sp2;
|
---|
2018 | u16_t left_len, uri_len;
|
---|
2019 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("CRLF received, parsing request\n"));
|
---|
2020 | /* parse method */
|
---|
2021 | if (!strncmp(data, "GET ", 4)) {
|
---|
2022 | sp1 = data + 3;
|
---|
2023 | /* received GET request */
|
---|
2024 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Received GET request\"\n"));
|
---|
2025 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2026 | } else if (!strncmp(data, "POST ", 5)) {
|
---|
2027 | /* store request type */
|
---|
2028 | is_post = 1;
|
---|
2029 | sp1 = data + 4;
|
---|
2030 | /* received GET request */
|
---|
2031 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Received POST request\n"));
|
---|
2032 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2033 | } else {
|
---|
2034 | /* null-terminate the METHOD (pbuf is freed anyway wen returning) */
|
---|
2035 | data[4] = 0;
|
---|
2036 | /* unsupported method! */
|
---|
2037 | LWIP_DEBUGF(HTTPD_DEBUG, ("Unsupported request method (not implemented): \"%s\"\n",
|
---|
2038 | data));
|
---|
2039 | return http_find_error_file(hs, 501);
|
---|
2040 | }
|
---|
2041 | /* if we come here, method is OK, parse URI */
|
---|
2042 | left_len = (u16_t)(data_len - ((sp1 + 1) - data));
|
---|
2043 | sp2 = lwip_strnstr(sp1 + 1, " ", left_len);
|
---|
2044 | #if LWIP_HTTPD_SUPPORT_V09
|
---|
2045 | if (sp2 == NULL) {
|
---|
2046 | /* HTTP 0.9: respond with correct protocol version */
|
---|
2047 | sp2 = lwip_strnstr(sp1 + 1, CRLF, left_len);
|
---|
2048 | is_09 = 1;
|
---|
2049 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2050 | if (is_post) {
|
---|
2051 | /* HTTP/0.9 does not support POST */
|
---|
2052 | goto badrequest;
|
---|
2053 | }
|
---|
2054 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2055 | }
|
---|
2056 | #endif /* LWIP_HTTPD_SUPPORT_V09 */
|
---|
2057 | uri_len = (u16_t)(sp2 - (sp1 + 1));
|
---|
2058 | if ((sp2 != 0) && (sp2 > sp1)) {
|
---|
2059 | /* wait for CRLFCRLF (indicating end of HTTP headers) before parsing anything */
|
---|
2060 | if (lwip_strnstr(data, CRLF CRLF, data_len) != NULL) {
|
---|
2061 | char *uri = sp1 + 1;
|
---|
2062 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
2063 | /* This is HTTP/1.0 compatible: for strict 1.1, a connection
|
---|
2064 | would always be persistent unless "close" was specified. */
|
---|
2065 | if (!is_09 && (lwip_strnstr(data, HTTP11_CONNECTIONKEEPALIVE, data_len) ||
|
---|
2066 | lwip_strnstr(data, HTTP11_CONNECTIONKEEPALIVE2, data_len))) {
|
---|
2067 | hs->keepalive = 1;
|
---|
2068 | } else {
|
---|
2069 | hs->keepalive = 0;
|
---|
2070 | }
|
---|
2071 | #endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
|
---|
2072 | /* null-terminate the METHOD (pbuf is freed anyway wen returning) */
|
---|
2073 | *sp1 = 0;
|
---|
2074 | uri[uri_len] = 0;
|
---|
2075 | LWIP_DEBUGF(HTTPD_DEBUG, ("Received \"%s\" request for URI: \"%s\"\n",
|
---|
2076 | data, uri));
|
---|
2077 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2078 | if (is_post) {
|
---|
2079 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
2080 | struct pbuf *q = hs->req;
|
---|
2081 | #else /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
2082 | struct pbuf *q = inp;
|
---|
2083 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
2084 | err = http_post_request(q, hs, data, data_len, uri, sp2);
|
---|
2085 | if (err != ERR_OK) {
|
---|
2086 | /* restore header for next try */
|
---|
2087 | *sp1 = ' ';
|
---|
2088 | *sp2 = ' ';
|
---|
2089 | uri[uri_len] = ' ';
|
---|
2090 | }
|
---|
2091 | if (err == ERR_ARG) {
|
---|
2092 | goto badrequest;
|
---|
2093 | }
|
---|
2094 | return err;
|
---|
2095 | } else
|
---|
2096 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2097 | {
|
---|
2098 | return http_find_file(hs, uri, is_09);
|
---|
2099 | }
|
---|
2100 | }
|
---|
2101 | } else {
|
---|
2102 | LWIP_DEBUGF(HTTPD_DEBUG, ("invalid URI\n"));
|
---|
2103 | }
|
---|
2104 | }
|
---|
2105 | }
|
---|
2106 |
|
---|
2107 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
2108 | clen = pbuf_clen(hs->req);
|
---|
2109 | if ((hs->req->tot_len <= LWIP_HTTPD_REQ_BUFSIZE) &&
|
---|
2110 | (clen <= LWIP_HTTPD_REQ_QUEUELEN)) {
|
---|
2111 | /* request not fully received (too short or CRLF is missing) */
|
---|
2112 | return ERR_INPROGRESS;
|
---|
2113 | } else
|
---|
2114 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
2115 | {
|
---|
2116 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2117 | badrequest:
|
---|
2118 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2119 | LWIP_DEBUGF(HTTPD_DEBUG, ("bad request\n"));
|
---|
2120 | /* could not parse request */
|
---|
2121 | return http_find_error_file(hs, 400);
|
---|
2122 | }
|
---|
2123 | }
|
---|
2124 |
|
---|
2125 | #if LWIP_HTTPD_SSI && (LWIP_HTTPD_SSI_BY_FILE_EXTENSION == 1)
|
---|
2126 | /* Check if SSI should be parsed for this file/URL
|
---|
2127 | * (With LWIP_HTTPD_SSI_BY_FILE_EXTENSION == 2, this function can be
|
---|
2128 | * overridden by an external implementation.)
|
---|
2129 | *
|
---|
2130 | * @return 1 for SSI, 0 for standard files
|
---|
2131 | */
|
---|
2132 | static u8_t
|
---|
2133 | http_uri_is_ssi(struct fs_file *file, const char *uri)
|
---|
2134 | {
|
---|
2135 | size_t loop;
|
---|
2136 | u8_t tag_check = 0;
|
---|
2137 | if (file != NULL) {
|
---|
2138 | /* See if we have been asked for an shtml file and, if so,
|
---|
2139 | enable tag checking. */
|
---|
2140 | const char *ext = NULL, *sub;
|
---|
2141 | char *param = (char *)strstr(uri, "?");
|
---|
2142 | if (param != NULL) {
|
---|
2143 | /* separate uri from parameters for now, set back later */
|
---|
2144 | *param = 0;
|
---|
2145 | }
|
---|
2146 | sub = uri;
|
---|
2147 | ext = uri;
|
---|
2148 | for (sub = strstr(sub, "."); sub != NULL; sub = strstr(sub, ".")) {
|
---|
2149 | ext = sub;
|
---|
2150 | sub++;
|
---|
2151 | }
|
---|
2152 | for (loop = 0; loop < NUM_SHTML_EXTENSIONS; loop++) {
|
---|
2153 | if (!lwip_stricmp(ext, g_pcSSIExtensions[loop])) {
|
---|
2154 | tag_check = 1;
|
---|
2155 | break;
|
---|
2156 | }
|
---|
2157 | }
|
---|
2158 | if (param != NULL) {
|
---|
2159 | *param = '?';
|
---|
2160 | }
|
---|
2161 | }
|
---|
2162 | return tag_check;
|
---|
2163 | }
|
---|
2164 | #endif /* LWIP_HTTPD_SSI */
|
---|
2165 |
|
---|
2166 | /** Try to find the file specified by uri and, if found, initialize hs
|
---|
2167 | * accordingly.
|
---|
2168 | *
|
---|
2169 | * @param hs the connection state
|
---|
2170 | * @param uri the HTTP header URI
|
---|
2171 | * @param is_09 1 if the request is HTTP/0.9 (no HTTP headers in response)
|
---|
2172 | * @return ERR_OK if file was found and hs has been initialized correctly
|
---|
2173 | * another err_t otherwise
|
---|
2174 | */
|
---|
2175 | static err_t
|
---|
2176 | http_find_file(struct http_state *hs, const char *uri, int is_09)
|
---|
2177 | {
|
---|
2178 | size_t loop;
|
---|
2179 | struct fs_file *file = NULL;
|
---|
2180 | char *params = NULL;
|
---|
2181 | err_t err;
|
---|
2182 | #if LWIP_HTTPD_CGI
|
---|
2183 | int i;
|
---|
2184 | #endif /* LWIP_HTTPD_CGI */
|
---|
2185 | #if !LWIP_HTTPD_SSI
|
---|
2186 | const
|
---|
2187 | #endif /* !LWIP_HTTPD_SSI */
|
---|
2188 | /* By default, assume we will not be processing server-side-includes tags */
|
---|
2189 | u8_t tag_check = 0;
|
---|
2190 |
|
---|
2191 | /* Have we been asked for the default file (in root or a directory) ? */
|
---|
2192 | #if LWIP_HTTPD_MAX_REQUEST_URI_LEN
|
---|
2193 | size_t uri_len = strlen(uri);
|
---|
2194 | if ((uri_len > 0) && (uri[uri_len - 1] == '/') &&
|
---|
2195 | ((uri != http_uri_buf) || (uri_len == 1))) {
|
---|
2196 | size_t copy_len = LWIP_MIN(sizeof(http_uri_buf) - 1, uri_len - 1);
|
---|
2197 | if (copy_len > 0) {
|
---|
2198 | MEMCPY(http_uri_buf, uri, copy_len);
|
---|
2199 | http_uri_buf[copy_len] = 0;
|
---|
2200 | }
|
---|
2201 | #else /* LWIP_HTTPD_MAX_REQUEST_URI_LEN */
|
---|
2202 | if ((uri[0] == '/') && (uri[1] == 0)) {
|
---|
2203 | #endif /* LWIP_HTTPD_MAX_REQUEST_URI_LEN */
|
---|
2204 | /* Try each of the configured default filenames until we find one
|
---|
2205 | that exists. */
|
---|
2206 | for (loop = 0; loop < NUM_DEFAULT_FILENAMES; loop++) {
|
---|
2207 | const char *file_name;
|
---|
2208 | #if LWIP_HTTPD_MAX_REQUEST_URI_LEN
|
---|
2209 | if (copy_len > 0) {
|
---|
2210 | size_t len_left = sizeof(http_uri_buf) - copy_len - 1;
|
---|
2211 | if (len_left > 0) {
|
---|
2212 | size_t name_len = strlen(httpd_default_filenames[loop].name);
|
---|
2213 | size_t name_copy_len = LWIP_MIN(len_left, name_len);
|
---|
2214 | MEMCPY(&http_uri_buf[copy_len], httpd_default_filenames[loop].name, name_copy_len);
|
---|
2215 | http_uri_buf[copy_len + name_copy_len] = 0;
|
---|
2216 | }
|
---|
2217 | file_name = http_uri_buf;
|
---|
2218 | } else
|
---|
2219 | #endif /* LWIP_HTTPD_MAX_REQUEST_URI_LEN */
|
---|
2220 | {
|
---|
2221 | file_name = httpd_default_filenames[loop].name;
|
---|
2222 | }
|
---|
2223 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Looking for %s...\n", file_name));
|
---|
2224 | err = fs_open(&hs->file_handle, file_name);
|
---|
2225 | if (err == ERR_OK) {
|
---|
2226 | uri = file_name;
|
---|
2227 | file = &hs->file_handle;
|
---|
2228 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Opened.\n"));
|
---|
2229 | #if LWIP_HTTPD_SSI
|
---|
2230 | tag_check = httpd_default_filenames[loop].shtml;
|
---|
2231 | #endif /* LWIP_HTTPD_SSI */
|
---|
2232 | break;
|
---|
2233 | }
|
---|
2234 | }
|
---|
2235 | }
|
---|
2236 | if (file == NULL) {
|
---|
2237 | /* No - we've been asked for a specific file. */
|
---|
2238 | /* First, isolate the base URI (without any parameters) */
|
---|
2239 | params = (char *)strchr(uri, '?');
|
---|
2240 | if (params != NULL) {
|
---|
2241 | /* URI contains parameters. NULL-terminate the base URI */
|
---|
2242 | *params = '\0';
|
---|
2243 | params++;
|
---|
2244 | }
|
---|
2245 |
|
---|
2246 | #if LWIP_HTTPD_CGI
|
---|
2247 | http_cgi_paramcount = -1;
|
---|
2248 | /* Does the base URI we have isolated correspond to a CGI handler? */
|
---|
2249 | if (httpd_num_cgis && httpd_cgis) {
|
---|
2250 | for (i = 0; i < httpd_num_cgis; i++) {
|
---|
2251 | if (strcmp(uri, httpd_cgis[i].pcCGIName) == 0) {
|
---|
2252 | /*
|
---|
2253 | * We found a CGI that handles this URI so extract the
|
---|
2254 | * parameters and call the handler.
|
---|
2255 | */
|
---|
2256 | http_cgi_paramcount = extract_uri_parameters(hs, params);
|
---|
2257 | uri = httpd_cgis[i].pfnCGIHandler(i, http_cgi_paramcount, hs->params,
|
---|
2258 | hs->param_vals);
|
---|
2259 | break;
|
---|
2260 | }
|
---|
2261 | }
|
---|
2262 | }
|
---|
2263 | #endif /* LWIP_HTTPD_CGI */
|
---|
2264 |
|
---|
2265 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("Opening %s\n", uri));
|
---|
2266 |
|
---|
2267 | err = fs_open(&hs->file_handle, uri);
|
---|
2268 | if (err == ERR_OK) {
|
---|
2269 | file = &hs->file_handle;
|
---|
2270 | } else {
|
---|
2271 | file = http_get_404_file(hs, &uri);
|
---|
2272 | }
|
---|
2273 | #if LWIP_HTTPD_SSI
|
---|
2274 | if (file != NULL) {
|
---|
2275 | if (file->flags & FS_FILE_FLAGS_SSI) {
|
---|
2276 | tag_check = 1;
|
---|
2277 | } else {
|
---|
2278 | #if LWIP_HTTPD_SSI_BY_FILE_EXTENSION
|
---|
2279 | tag_check = http_uri_is_ssi(file, uri);
|
---|
2280 | #endif /* LWIP_HTTPD_SSI_BY_FILE_EXTENSION */
|
---|
2281 | }
|
---|
2282 | }
|
---|
2283 | #endif /* LWIP_HTTPD_SSI */
|
---|
2284 | }
|
---|
2285 | if (file == NULL) {
|
---|
2286 | /* None of the default filenames exist so send back a 404 page */
|
---|
2287 | file = http_get_404_file(hs, &uri);
|
---|
2288 | }
|
---|
2289 | return http_init_file(hs, file, is_09, uri, tag_check, params);
|
---|
2290 | }
|
---|
2291 |
|
---|
2292 | /** Initialize a http connection with a file to send (if found).
|
---|
2293 | * Called by http_find_file and http_find_error_file.
|
---|
2294 | *
|
---|
2295 | * @param hs http connection state
|
---|
2296 | * @param file file structure to send (or NULL if not found)
|
---|
2297 | * @param is_09 1 if the request is HTTP/0.9 (no HTTP headers in response)
|
---|
2298 | * @param uri the HTTP header URI
|
---|
2299 | * @param tag_check enable SSI tag checking
|
---|
2300 | * @param params != NULL if URI has parameters (separated by '?')
|
---|
2301 | * @return ERR_OK if file was found and hs has been initialized correctly
|
---|
2302 | * another err_t otherwise
|
---|
2303 | */
|
---|
2304 | static err_t
|
---|
2305 | http_init_file(struct http_state *hs, struct fs_file *file, int is_09, const char *uri,
|
---|
2306 | u8_t tag_check, char *params)
|
---|
2307 | {
|
---|
2308 | #if !LWIP_HTTPD_SUPPORT_V09
|
---|
2309 | LWIP_UNUSED_ARG(is_09);
|
---|
2310 | #endif
|
---|
2311 | if (file != NULL) {
|
---|
2312 | /* file opened, initialise struct http_state */
|
---|
2313 | #if !LWIP_HTTPD_DYNAMIC_FILE_READ
|
---|
2314 | /* If dynamic read is disabled, file data must be in one piece and available now */
|
---|
2315 | LWIP_ASSERT("file->data != NULL", file->data != NULL);
|
---|
2316 | #endif
|
---|
2317 |
|
---|
2318 | #if LWIP_HTTPD_SSI
|
---|
2319 | if (tag_check) {
|
---|
2320 | struct http_ssi_state *ssi = http_ssi_state_alloc();
|
---|
2321 | if (ssi != NULL) {
|
---|
2322 | ssi->tag_index = 0;
|
---|
2323 | ssi->tag_state = TAG_NONE;
|
---|
2324 | ssi->parsed = file->data;
|
---|
2325 | ssi->parse_left = file->len;
|
---|
2326 | ssi->tag_end = file->data;
|
---|
2327 | hs->ssi = ssi;
|
---|
2328 | }
|
---|
2329 | }
|
---|
2330 | #else /* LWIP_HTTPD_SSI */
|
---|
2331 | LWIP_UNUSED_ARG(tag_check);
|
---|
2332 | #endif /* LWIP_HTTPD_SSI */
|
---|
2333 | hs->handle = file;
|
---|
2334 | #if LWIP_HTTPD_CGI_SSI
|
---|
2335 | if (params != NULL) {
|
---|
2336 | /* URI contains parameters, call generic CGI handler */
|
---|
2337 | int count;
|
---|
2338 | #if LWIP_HTTPD_CGI
|
---|
2339 | if (http_cgi_paramcount >= 0) {
|
---|
2340 | count = http_cgi_paramcount;
|
---|
2341 | } else
|
---|
2342 | #endif
|
---|
2343 | {
|
---|
2344 | count = extract_uri_parameters(hs, params);
|
---|
2345 | }
|
---|
2346 | httpd_cgi_handler(file, uri, count, http_cgi_params, http_cgi_param_vals
|
---|
2347 | #if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
|
---|
2348 | , file->state
|
---|
2349 | #endif /* LWIP_HTTPD_FILE_STATE */
|
---|
2350 | );
|
---|
2351 | }
|
---|
2352 | #else /* LWIP_HTTPD_CGI_SSI */
|
---|
2353 | LWIP_UNUSED_ARG(params);
|
---|
2354 | #endif /* LWIP_HTTPD_CGI_SSI */
|
---|
2355 | hs->file = file->data;
|
---|
2356 | LWIP_ASSERT("File length must be positive!", (file->len >= 0));
|
---|
2357 | #if LWIP_HTTPD_CUSTOM_FILES
|
---|
2358 | if (file->is_custom_file && (file->data == NULL)) {
|
---|
2359 | /* custom file, need to read data first (via fs_read_custom) */
|
---|
2360 | hs->left = 0;
|
---|
2361 | } else
|
---|
2362 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
|
---|
2363 | {
|
---|
2364 | hs->left = (u32_t)file->len;
|
---|
2365 | }
|
---|
2366 | hs->retries = 0;
|
---|
2367 | #if LWIP_HTTPD_TIMING
|
---|
2368 | hs->time_started = sys_now();
|
---|
2369 | #endif /* LWIP_HTTPD_TIMING */
|
---|
2370 | #if !LWIP_HTTPD_DYNAMIC_HEADERS
|
---|
2371 | LWIP_ASSERT("HTTP headers not included in file system",
|
---|
2372 | (hs->handle->flags & FS_FILE_FLAGS_HEADER_INCLUDED) != 0);
|
---|
2373 | #endif /* !LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
2374 | #if LWIP_HTTPD_SUPPORT_V09
|
---|
2375 | if (is_09 && ((hs->handle->flags & FS_FILE_FLAGS_HEADER_INCLUDED) != 0)) {
|
---|
2376 | /* HTTP/0.9 responses are sent without HTTP header,
|
---|
2377 | search for the end of the header. */
|
---|
2378 | char *file_start = lwip_strnstr(hs->file, CRLF CRLF, hs->left);
|
---|
2379 | if (file_start != NULL) {
|
---|
2380 | int diff = file_start + 4 - hs->file;
|
---|
2381 | hs->file += diff;
|
---|
2382 | hs->left -= (u32_t)diff;
|
---|
2383 | }
|
---|
2384 | }
|
---|
2385 | #endif /* LWIP_HTTPD_SUPPORT_V09*/
|
---|
2386 | } else {
|
---|
2387 | hs->handle = NULL;
|
---|
2388 | hs->file = NULL;
|
---|
2389 | hs->left = 0;
|
---|
2390 | hs->retries = 0;
|
---|
2391 | }
|
---|
2392 | #if LWIP_HTTPD_DYNAMIC_HEADERS
|
---|
2393 | /* Determine the HTTP headers to send based on the file extension of
|
---|
2394 | * the requested URI. */
|
---|
2395 | if ((hs->handle == NULL) || ((hs->handle->flags & FS_FILE_FLAGS_HEADER_INCLUDED) == 0)) {
|
---|
2396 | get_http_headers(hs, uri);
|
---|
2397 | }
|
---|
2398 | #else /* LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
2399 | LWIP_UNUSED_ARG(uri);
|
---|
2400 | #endif /* LWIP_HTTPD_DYNAMIC_HEADERS */
|
---|
2401 | #if LWIP_HTTPD_SUPPORT_11_KEEPALIVE
|
---|
2402 | if (hs->keepalive) {
|
---|
2403 | #if LWIP_HTTPD_SSI
|
---|
2404 | if (hs->ssi != NULL) {
|
---|
2405 | hs->keepalive = 0;
|
---|
2406 | } else
|
---|
2407 | #endif /* LWIP_HTTPD_SSI */
|
---|
2408 | {
|
---|
2409 | if ((hs->handle != NULL) &&
|
---|
2410 | ((hs->handle->flags & (FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT)) == FS_FILE_FLAGS_HEADER_INCLUDED)) {
|
---|
2411 | hs->keepalive = 0;
|
---|
2412 | }
|
---|
2413 | }
|
---|
2414 | }
|
---|
2415 | #endif /* LWIP_HTTPD_SUPPORT_11_KEEPALIVE */
|
---|
2416 | return ERR_OK;
|
---|
2417 | }
|
---|
2418 |
|
---|
2419 | /**
|
---|
2420 | * The pcb had an error and is already deallocated.
|
---|
2421 | * The argument might still be valid (if != NULL).
|
---|
2422 | */
|
---|
2423 | static void
|
---|
2424 | http_err(void *arg, err_t err)
|
---|
2425 | {
|
---|
2426 | struct http_state *hs = (struct http_state *)arg;
|
---|
2427 | LWIP_UNUSED_ARG(err);
|
---|
2428 |
|
---|
2429 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_err: %s", lwip_strerr(err)));
|
---|
2430 |
|
---|
2431 | if (hs != NULL) {
|
---|
2432 | http_state_free(hs);
|
---|
2433 | }
|
---|
2434 | }
|
---|
2435 |
|
---|
2436 | /**
|
---|
2437 | * Data has been sent and acknowledged by the remote host.
|
---|
2438 | * This means that more data can be sent.
|
---|
2439 | */
|
---|
2440 | static err_t
|
---|
2441 | http_sent(void *arg, struct altcp_pcb *pcb, u16_t len)
|
---|
2442 | {
|
---|
2443 | struct http_state *hs = (struct http_state *)arg;
|
---|
2444 |
|
---|
2445 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_sent %p\n", (void *)pcb));
|
---|
2446 |
|
---|
2447 | LWIP_UNUSED_ARG(len);
|
---|
2448 |
|
---|
2449 | if (hs == NULL) {
|
---|
2450 | return ERR_OK;
|
---|
2451 | }
|
---|
2452 |
|
---|
2453 | hs->retries = 0;
|
---|
2454 |
|
---|
2455 | http_send(pcb, hs);
|
---|
2456 |
|
---|
2457 | return ERR_OK;
|
---|
2458 | }
|
---|
2459 |
|
---|
2460 | /**
|
---|
2461 | * The poll function is called every 2nd second.
|
---|
2462 | * If there has been no data sent (which resets the retries) in 8 seconds, close.
|
---|
2463 | * If the last portion of a file has not been sent in 2 seconds, close.
|
---|
2464 | *
|
---|
2465 | * This could be increased, but we don't want to waste resources for bad connections.
|
---|
2466 | */
|
---|
2467 | static err_t
|
---|
2468 | http_poll(void *arg, struct altcp_pcb *pcb)
|
---|
2469 | {
|
---|
2470 | struct http_state *hs = (struct http_state *)arg;
|
---|
2471 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_poll: pcb=%p hs=%p pcb_state=%s\n",
|
---|
2472 | (void *)pcb, (void *)hs, tcp_debug_state_str(altcp_dbg_get_tcp_state(pcb))));
|
---|
2473 |
|
---|
2474 | if (hs == NULL) {
|
---|
2475 | err_t closed;
|
---|
2476 | /* arg is null, close. */
|
---|
2477 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_poll: arg is NULL, close\n"));
|
---|
2478 | closed = http_close_conn(pcb, NULL);
|
---|
2479 | LWIP_UNUSED_ARG(closed);
|
---|
2480 | #if LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR
|
---|
2481 | if (closed == ERR_MEM) {
|
---|
2482 | altcp_abort(pcb);
|
---|
2483 | return ERR_ABRT;
|
---|
2484 | }
|
---|
2485 | #endif /* LWIP_HTTPD_ABORT_ON_CLOSE_MEM_ERROR */
|
---|
2486 | return ERR_OK;
|
---|
2487 | } else {
|
---|
2488 | hs->retries++;
|
---|
2489 | if (hs->retries == HTTPD_MAX_RETRIES) {
|
---|
2490 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_poll: too many retries, close\n"));
|
---|
2491 | http_close_conn(pcb, hs);
|
---|
2492 | return ERR_OK;
|
---|
2493 | }
|
---|
2494 |
|
---|
2495 | /* If this connection has a file open, try to send some more data. If
|
---|
2496 | * it has not yet received a GET request, don't do this since it will
|
---|
2497 | * cause the connection to close immediately. */
|
---|
2498 | if (hs->handle) {
|
---|
2499 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_poll: try to send more data\n"));
|
---|
2500 | if (http_send(pcb, hs)) {
|
---|
2501 | /* If we wrote anything to be sent, go ahead and send it now. */
|
---|
2502 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("tcp_output\n"));
|
---|
2503 | altcp_output(pcb);
|
---|
2504 | }
|
---|
2505 | }
|
---|
2506 | }
|
---|
2507 |
|
---|
2508 | return ERR_OK;
|
---|
2509 | }
|
---|
2510 |
|
---|
2511 | /**
|
---|
2512 | * Data has been received on this pcb.
|
---|
2513 | * For HTTP 1.0, this should normally only happen once (if the request fits in one packet).
|
---|
2514 | */
|
---|
2515 | static err_t
|
---|
2516 | http_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err)
|
---|
2517 | {
|
---|
2518 | struct http_state *hs = (struct http_state *)arg;
|
---|
2519 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: pcb=%p pbuf=%p err=%s\n", (void *)pcb,
|
---|
2520 | (void *)p, lwip_strerr(err)));
|
---|
2521 |
|
---|
2522 | if ((err != ERR_OK) || (p == NULL) || (hs == NULL)) {
|
---|
2523 | /* error or closed by other side? */
|
---|
2524 | if (p != NULL) {
|
---|
2525 | /* Inform TCP that we have taken the data. */
|
---|
2526 | altcp_recved(pcb, p->tot_len);
|
---|
2527 | pbuf_free(p);
|
---|
2528 | }
|
---|
2529 | if (hs == NULL) {
|
---|
2530 | /* this should not happen, only to be robust */
|
---|
2531 | LWIP_DEBUGF(HTTPD_DEBUG, ("Error, http_recv: hs is NULL, close\n"));
|
---|
2532 | }
|
---|
2533 | http_close_conn(pcb, hs);
|
---|
2534 | return ERR_OK;
|
---|
2535 | }
|
---|
2536 |
|
---|
2537 | #if LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND
|
---|
2538 | if (hs->no_auto_wnd) {
|
---|
2539 | hs->unrecved_bytes += p->tot_len;
|
---|
2540 | } else
|
---|
2541 | #endif /* LWIP_HTTPD_SUPPORT_POST && LWIP_HTTPD_POST_MANUAL_WND */
|
---|
2542 | {
|
---|
2543 | /* Inform TCP that we have taken the data. */
|
---|
2544 | altcp_recved(pcb, p->tot_len);
|
---|
2545 | }
|
---|
2546 |
|
---|
2547 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2548 | if (hs->post_content_len_left > 0) {
|
---|
2549 | /* reset idle counter when POST data is received */
|
---|
2550 | hs->retries = 0;
|
---|
2551 | /* this is data for a POST, pass the complete pbuf to the application */
|
---|
2552 | http_post_rxpbuf(hs, p);
|
---|
2553 | /* pbuf is passed to the application, don't free it! */
|
---|
2554 | if (hs->post_content_len_left == 0) {
|
---|
2555 | /* all data received, send response or close connection */
|
---|
2556 | http_send(pcb, hs);
|
---|
2557 | }
|
---|
2558 | return ERR_OK;
|
---|
2559 | } else
|
---|
2560 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2561 | {
|
---|
2562 | if (hs->handle == NULL) {
|
---|
2563 | err_t parsed = http_parse_request(p, hs, pcb);
|
---|
2564 | LWIP_ASSERT("http_parse_request: unexpected return value", parsed == ERR_OK
|
---|
2565 | || parsed == ERR_INPROGRESS || parsed == ERR_ARG || parsed == ERR_USE);
|
---|
2566 | #if LWIP_HTTPD_SUPPORT_REQUESTLIST
|
---|
2567 | if (parsed != ERR_INPROGRESS) {
|
---|
2568 | /* request fully parsed or error */
|
---|
2569 | if (hs->req != NULL) {
|
---|
2570 | pbuf_free(hs->req);
|
---|
2571 | hs->req = NULL;
|
---|
2572 | }
|
---|
2573 | }
|
---|
2574 | #endif /* LWIP_HTTPD_SUPPORT_REQUESTLIST */
|
---|
2575 | pbuf_free(p);
|
---|
2576 | if (parsed == ERR_OK) {
|
---|
2577 | #if LWIP_HTTPD_SUPPORT_POST
|
---|
2578 | if (hs->post_content_len_left == 0)
|
---|
2579 | #endif /* LWIP_HTTPD_SUPPORT_POST */
|
---|
2580 | {
|
---|
2581 | LWIP_DEBUGF(HTTPD_DEBUG | LWIP_DBG_TRACE, ("http_recv: data %p len %"S32_F"\n", (const void *)hs->file, hs->left));
|
---|
2582 | http_send(pcb, hs);
|
---|
2583 | }
|
---|
2584 | } else if (parsed == ERR_ARG) {
|
---|
2585 | /* @todo: close on ERR_USE? */
|
---|
2586 | http_close_conn(pcb, hs);
|
---|
2587 | }
|
---|
2588 | } else {
|
---|
2589 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_recv: already sending data\n"));
|
---|
2590 | /* already sending but still receiving data, we might want to RST here? */
|
---|
2591 | pbuf_free(p);
|
---|
2592 | }
|
---|
2593 | }
|
---|
2594 | return ERR_OK;
|
---|
2595 | }
|
---|
2596 |
|
---|
2597 | /**
|
---|
2598 | * A new incoming connection has been accepted.
|
---|
2599 | */
|
---|
2600 | static err_t
|
---|
2601 | http_accept(void *arg, struct altcp_pcb *pcb, err_t err)
|
---|
2602 | {
|
---|
2603 | struct http_state *hs;
|
---|
2604 | LWIP_UNUSED_ARG(err);
|
---|
2605 | LWIP_UNUSED_ARG(arg);
|
---|
2606 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_accept %p / %p\n", (void *)pcb, arg));
|
---|
2607 |
|
---|
2608 | if ((err != ERR_OK) || (pcb == NULL)) {
|
---|
2609 | return ERR_VAL;
|
---|
2610 | }
|
---|
2611 |
|
---|
2612 | /* Set priority */
|
---|
2613 | altcp_setprio(pcb, HTTPD_TCP_PRIO);
|
---|
2614 |
|
---|
2615 | /* Allocate memory for the structure that holds the state of the
|
---|
2616 | connection - initialized by that function. */
|
---|
2617 | hs = http_state_alloc();
|
---|
2618 | if (hs == NULL) {
|
---|
2619 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_accept: Out of memory, RST\n"));
|
---|
2620 | return ERR_MEM;
|
---|
2621 | }
|
---|
2622 | hs->pcb = pcb;
|
---|
2623 |
|
---|
2624 | /* Tell TCP that this is the structure we wish to be passed for our
|
---|
2625 | callbacks. */
|
---|
2626 | altcp_arg(pcb, hs);
|
---|
2627 |
|
---|
2628 | /* Set up the various callback functions */
|
---|
2629 | altcp_recv(pcb, http_recv);
|
---|
2630 | altcp_err(pcb, http_err);
|
---|
2631 | altcp_poll(pcb, http_poll, HTTPD_POLL_INTERVAL);
|
---|
2632 | altcp_sent(pcb, http_sent);
|
---|
2633 |
|
---|
2634 | return ERR_OK;
|
---|
2635 | }
|
---|
2636 |
|
---|
2637 | static void
|
---|
2638 | httpd_init_pcb(struct altcp_pcb *pcb, u16_t port)
|
---|
2639 | {
|
---|
2640 | err_t err;
|
---|
2641 |
|
---|
2642 | if (pcb) {
|
---|
2643 | altcp_setprio(pcb, HTTPD_TCP_PRIO);
|
---|
2644 | /* set SOF_REUSEADDR here to explicitly bind httpd to multiple interfaces */
|
---|
2645 | err = altcp_bind(pcb, IP_ANY_TYPE, port);
|
---|
2646 | LWIP_UNUSED_ARG(err); /* in case of LWIP_NOASSERT */
|
---|
2647 | LWIP_ASSERT("httpd_init: tcp_bind failed", err == ERR_OK);
|
---|
2648 | pcb = altcp_listen(pcb);
|
---|
2649 | LWIP_ASSERT("httpd_init: tcp_listen failed", pcb != NULL);
|
---|
2650 | altcp_accept(pcb, http_accept);
|
---|
2651 | }
|
---|
2652 | }
|
---|
2653 |
|
---|
2654 | /**
|
---|
2655 | * @ingroup httpd
|
---|
2656 | * Initialize the httpd: set up a listening PCB and bind it to the defined port
|
---|
2657 | */
|
---|
2658 | void
|
---|
2659 | httpd_init(void)
|
---|
2660 | {
|
---|
2661 | struct altcp_pcb *pcb;
|
---|
2662 |
|
---|
2663 | #if HTTPD_USE_MEM_POOL
|
---|
2664 | LWIP_MEMPOOL_INIT(HTTPD_STATE);
|
---|
2665 | #if LWIP_HTTPD_SSI
|
---|
2666 | LWIP_MEMPOOL_INIT(HTTPD_SSI_STATE);
|
---|
2667 | #endif
|
---|
2668 | #endif
|
---|
2669 | LWIP_DEBUGF(HTTPD_DEBUG, ("httpd_init\n"));
|
---|
2670 |
|
---|
2671 | /* LWIP_ASSERT_CORE_LOCKED(); is checked by tcp_new() */
|
---|
2672 |
|
---|
2673 | pcb = altcp_tcp_new_ip_type(IPADDR_TYPE_ANY);
|
---|
2674 | LWIP_ASSERT("httpd_init: tcp_new failed", pcb != NULL);
|
---|
2675 | httpd_init_pcb(pcb, HTTPD_SERVER_PORT);
|
---|
2676 | }
|
---|
2677 |
|
---|
2678 | #if HTTPD_ENABLE_HTTPS
|
---|
2679 | /**
|
---|
2680 | * @ingroup httpd
|
---|
2681 | * Initialize the httpd: set up a listening PCB and bind it to the defined port.
|
---|
2682 | * Also set up TLS connection handling (HTTPS).
|
---|
2683 | */
|
---|
2684 | void
|
---|
2685 | httpd_inits(struct altcp_tls_config *conf)
|
---|
2686 | {
|
---|
2687 | #if LWIP_ALTCP_TLS
|
---|
2688 | struct altcp_pcb *pcb_tls = altcp_tls_new(conf, IPADDR_TYPE_ANY);
|
---|
2689 | LWIP_ASSERT("httpd_init: altcp_tls_new failed", pcb_tls != NULL);
|
---|
2690 | httpd_init_pcb(pcb_tls, HTTPD_SERVER_PORT_HTTPS);
|
---|
2691 | #else /* LWIP_ALTCP_TLS */
|
---|
2692 | LWIP_UNUSED_ARG(conf);
|
---|
2693 | #endif /* LWIP_ALTCP_TLS */
|
---|
2694 | }
|
---|
2695 | #endif /* HTTPD_ENABLE_HTTPS */
|
---|
2696 |
|
---|
2697 | #if LWIP_HTTPD_SSI
|
---|
2698 | /**
|
---|
2699 | * @ingroup httpd
|
---|
2700 | * Set the SSI handler function.
|
---|
2701 | *
|
---|
2702 | * @param ssi_handler the SSI handler function
|
---|
2703 | * @param tags an array of SSI tag strings to search for in SSI-enabled files
|
---|
2704 | * @param num_tags number of tags in the 'tags' array
|
---|
2705 | */
|
---|
2706 | void
|
---|
2707 | http_set_ssi_handler(tSSIHandler ssi_handler, const char **tags, int num_tags)
|
---|
2708 | {
|
---|
2709 | LWIP_DEBUGF(HTTPD_DEBUG, ("http_set_ssi_handler\n"));
|
---|
2710 |
|
---|
2711 | LWIP_ASSERT("no ssi_handler given", ssi_handler != NULL);
|
---|
2712 | httpd_ssi_handler = ssi_handler;
|
---|
2713 |
|
---|
2714 | #if LWIP_HTTPD_SSI_RAW
|
---|
2715 | LWIP_UNUSED_ARG(tags);
|
---|
2716 | LWIP_UNUSED_ARG(num_tags);
|
---|
2717 | #else /* LWIP_HTTPD_SSI_RAW */
|
---|
2718 | LWIP_ASSERT("no tags given", tags != NULL);
|
---|
2719 | LWIP_ASSERT("invalid number of tags", num_tags > 0);
|
---|
2720 |
|
---|
2721 | httpd_tags = tags;
|
---|
2722 | httpd_num_tags = num_tags;
|
---|
2723 | #endif /* !LWIP_HTTPD_SSI_RAW */
|
---|
2724 | }
|
---|
2725 | #endif /* LWIP_HTTPD_SSI */
|
---|
2726 |
|
---|
2727 | #if LWIP_HTTPD_CGI
|
---|
2728 | /**
|
---|
2729 | * @ingroup httpd
|
---|
2730 | * Set an array of CGI filenames/handler functions
|
---|
2731 | *
|
---|
2732 | * @param cgis an array of CGI filenames/handler functions
|
---|
2733 | * @param num_handlers number of elements in the 'cgis' array
|
---|
2734 | */
|
---|
2735 | void
|
---|
2736 | http_set_cgi_handlers(const tCGI *cgis, int num_handlers)
|
---|
2737 | {
|
---|
2738 | LWIP_ASSERT("no cgis given", cgis != NULL);
|
---|
2739 | LWIP_ASSERT("invalid number of handlers", num_handlers > 0);
|
---|
2740 |
|
---|
2741 | httpd_cgis = cgis;
|
---|
2742 | httpd_num_cgis = num_handlers;
|
---|
2743 | }
|
---|
2744 | #endif /* LWIP_HTTPD_CGI */
|
---|
2745 |
|
---|
2746 | #endif /* LWIP_TCP && LWIP_CALLBACK_API */
|
---|