1 | /*
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2 | * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without modification,
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6 | * are permitted provided that the following conditions are met:
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7 | *
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8 | * 1. Redistributions of source code must retain the above copyright notice,
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9 | * this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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11 | * this list of conditions and the following disclaimer in the documentation
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12 | * and/or other materials provided with the distribution.
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13 | * 3. The name of the author may not be used to endorse or promote products
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14 | * derived from this software without specific prior written permission.
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15 | *
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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25 | * OF SUCH DAMAGE.
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26 | *
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27 | * This file is part of the lwIP TCP/IP stack.
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28 | *
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29 | * Author: Adam Dunkels <adam@sics.se>
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30 | *
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31 | */
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32 |
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33 | #include "lwip/apps/httpd_opts.h"
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34 | #include "lwip/def.h"
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35 | #include "lwip/apps/fs.h"
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36 | #include <string.h>
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37 |
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38 |
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39 | #include HTTPD_FSDATA_FILE
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40 |
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41 | /*-----------------------------------------------------------------------------------*/
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42 |
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43 | #if LWIP_HTTPD_CUSTOM_FILES
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44 | int fs_open_custom(struct fs_file *file, const char *name);
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45 | void fs_close_custom(struct fs_file *file);
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46 | #if LWIP_HTTPD_FS_ASYNC_READ
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47 | u8_t fs_canread_custom(struct fs_file *file);
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48 | u8_t fs_wait_read_custom(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg);
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49 | int fs_read_async_custom(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg);
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50 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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51 | int fs_read_custom(struct fs_file *file, char *buffer, int count);
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52 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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53 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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54 |
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55 | /*-----------------------------------------------------------------------------------*/
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56 | err_t
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57 | fs_open(struct fs_file *file, const char *name)
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58 | {
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59 | const struct fsdata_file *f;
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60 |
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61 | if ((file == NULL) || (name == NULL)) {
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62 | return ERR_ARG;
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63 | }
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64 |
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65 | #if LWIP_HTTPD_CUSTOM_FILES
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66 | if (fs_open_custom(file, name)) {
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67 | file->is_custom_file = 1;
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68 | return ERR_OK;
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69 | }
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70 | file->is_custom_file = 0;
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71 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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72 |
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73 | for (f = FS_ROOT; f != NULL; f = f->next) {
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74 | if (!strcmp(name, (const char *)f->name)) {
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75 | file->data = (const char *)f->data;
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76 | file->len = f->len;
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77 | file->index = f->len;
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78 | file->pextension = NULL;
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79 | file->flags = f->flags;
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80 | #if HTTPD_PRECALCULATED_CHECKSUM
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81 | file->chksum_count = f->chksum_count;
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82 | file->chksum = f->chksum;
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83 | #endif /* HTTPD_PRECALCULATED_CHECKSUM */
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84 | #if LWIP_HTTPD_FILE_STATE
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85 | file->state = fs_state_init(file, name);
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86 | #endif /* #if LWIP_HTTPD_FILE_STATE */
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87 | return ERR_OK;
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88 | }
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89 | }
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90 | /* file not found */
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91 | return ERR_VAL;
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92 | }
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93 |
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94 | /*-----------------------------------------------------------------------------------*/
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95 | void
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96 | fs_close(struct fs_file *file)
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97 | {
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98 | #if LWIP_HTTPD_CUSTOM_FILES
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99 | if (file->is_custom_file) {
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100 | fs_close_custom(file);
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101 | }
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102 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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103 | #if LWIP_HTTPD_FILE_STATE
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104 | fs_state_free(file, file->state);
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105 | #endif /* #if LWIP_HTTPD_FILE_STATE */
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106 | LWIP_UNUSED_ARG(file);
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107 | }
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108 | /*-----------------------------------------------------------------------------------*/
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109 | #if LWIP_HTTPD_DYNAMIC_FILE_READ
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110 | #if LWIP_HTTPD_FS_ASYNC_READ
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111 | int
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112 | fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg)
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113 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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114 | int
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115 | fs_read(struct fs_file *file, char *buffer, int count)
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116 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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117 | {
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118 | int read;
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119 | if (file->index == file->len) {
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120 | return FS_READ_EOF;
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121 | }
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122 | #if LWIP_HTTPD_FS_ASYNC_READ
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123 | LWIP_UNUSED_ARG(callback_fn);
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124 | LWIP_UNUSED_ARG(callback_arg);
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125 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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126 | #if LWIP_HTTPD_CUSTOM_FILES
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127 | if (file->is_custom_file) {
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128 | #if LWIP_HTTPD_FS_ASYNC_READ
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129 | return fs_read_async_custom(file, buffer, count, callback_fn, callback_arg);
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130 | #else /* LWIP_HTTPD_FS_ASYNC_READ */
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131 | return fs_read_custom(file, buffer, count);
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132 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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133 | }
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134 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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135 |
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136 | read = file->len - file->index;
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137 | if (read > count) {
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138 | read = count;
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139 | }
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140 |
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141 | MEMCPY(buffer, (file->data + file->index), read);
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142 | file->index += read;
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143 |
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144 | return (read);
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145 | }
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146 | #endif /* LWIP_HTTPD_DYNAMIC_FILE_READ */
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147 | /*-----------------------------------------------------------------------------------*/
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148 | #if LWIP_HTTPD_FS_ASYNC_READ
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149 | int
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150 | fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg)
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151 | {
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152 | if (file != NULL) {
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153 | #if LWIP_HTTPD_FS_ASYNC_READ
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154 | #if LWIP_HTTPD_CUSTOM_FILES
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155 | if (!fs_canread_custom(file)) {
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156 | if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
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157 | return 0;
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158 | }
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159 | }
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160 | #else /* LWIP_HTTPD_CUSTOM_FILES */
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161 | LWIP_UNUSED_ARG(callback_fn);
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162 | LWIP_UNUSED_ARG(callback_arg);
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163 | #endif /* LWIP_HTTPD_CUSTOM_FILES */
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164 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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165 | }
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166 | return 1;
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167 | }
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168 | #endif /* LWIP_HTTPD_FS_ASYNC_READ */
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169 | /*-----------------------------------------------------------------------------------*/
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170 | int
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171 | fs_bytes_left(struct fs_file *file)
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172 | {
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173 | return file->len - file->index;
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174 | }
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