[457] | 1 | /**
|
---|
| 2 | * @file
|
---|
| 3 | * HTTPD simple CGI example
|
---|
| 4 | *
|
---|
| 5 | * This file demonstrates how to add support for basic CGI.
|
---|
| 6 | */
|
---|
| 7 |
|
---|
| 8 | /*
|
---|
| 9 | * Copyright (c) 2017 Simon Goldschmidt
|
---|
| 10 | * All rights reserved.
|
---|
| 11 | *
|
---|
| 12 | * Redistribution and use in source and binary forms, with or without modification,
|
---|
| 13 | * are permitted provided that the following conditions are met:
|
---|
| 14 | *
|
---|
| 15 | * 1. Redistributions of source code must retain the above copyright notice,
|
---|
| 16 | * this list of conditions and the following disclaimer.
|
---|
| 17 | * 2. Redistributions in binary form must reproduce the above copyright notice,
|
---|
| 18 | * this list of conditions and the following disclaimer in the documentation
|
---|
| 19 | * and/or other materials provided with the distribution.
|
---|
| 20 | * 3. The name of the author may not be used to endorse or promote products
|
---|
| 21 | * derived from this software without specific prior written permission.
|
---|
| 22 | *
|
---|
| 23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
---|
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
---|
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
---|
| 26 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
---|
| 27 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
---|
| 28 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
---|
| 29 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
---|
| 30 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
---|
| 31 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
---|
| 32 | * OF SUCH DAMAGE.
|
---|
| 33 | *
|
---|
| 34 | * This file is part of the lwIP TCP/IP stack.
|
---|
| 35 | *
|
---|
| 36 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
|
---|
| 37 | *
|
---|
| 38 | */
|
---|
| 39 |
|
---|
| 40 | #include "lwip/opt.h"
|
---|
| 41 | #include "cgi_example.h"
|
---|
| 42 |
|
---|
| 43 | #include "lwip/apps/httpd.h"
|
---|
| 44 |
|
---|
| 45 | #include "lwip/def.h"
|
---|
| 46 | #include "lwip/mem.h"
|
---|
| 47 |
|
---|
| 48 | #include <stdio.h>
|
---|
| 49 | #include <string.h>
|
---|
| 50 |
|
---|
| 51 | /** define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE to 1 to enable this cgi example */
|
---|
| 52 | #ifndef LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
|
---|
| 53 | #define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE 0
|
---|
| 54 | #endif
|
---|
| 55 |
|
---|
| 56 | #if LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
|
---|
| 57 |
|
---|
| 58 | #if !LWIP_HTTPD_CGI
|
---|
| 59 | #error LWIP_HTTPD_EXAMPLE_CGI_SIMPLE needs LWIP_HTTPD_CGI
|
---|
| 60 | #endif
|
---|
| 61 |
|
---|
| 62 | static const char *cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
|
---|
| 63 |
|
---|
| 64 | static const tCGI cgi_handlers[] = {
|
---|
| 65 | {
|
---|
| 66 | "/basic_cgi",
|
---|
| 67 | cgi_handler_basic
|
---|
| 68 | },
|
---|
| 69 | {
|
---|
| 70 | "/basic_cgi_2",
|
---|
| 71 | cgi_handler_basic
|
---|
| 72 | }
|
---|
| 73 | };
|
---|
| 74 |
|
---|
| 75 | void
|
---|
| 76 | cgi_ex_init(void)
|
---|
| 77 | {
|
---|
| 78 | http_set_cgi_handlers(cgi_handlers, LWIP_ARRAYSIZE(cgi_handlers));
|
---|
| 79 | }
|
---|
| 80 |
|
---|
| 81 | /** This basic CGI function can parse param/value pairs and return an url that
|
---|
| 82 | * is sent as a response by httpd.
|
---|
| 83 | *
|
---|
| 84 | * This example function just checks that the input url has two key value
|
---|
| 85 | * parameter pairs: "foo=bar" and "test=123"
|
---|
| 86 | * If not, it returns 404
|
---|
| 87 | */
|
---|
| 88 | static const char *
|
---|
| 89 | cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
|
---|
| 90 | {
|
---|
| 91 | LWIP_ASSERT("check index", iIndex < LWIP_ARRAYSIZE(cgi_handlers));
|
---|
| 92 |
|
---|
| 93 | if (iNumParams == 2) {
|
---|
| 94 | if (!strcmp(pcParam[0], "foo")) {
|
---|
| 95 | if (!strcmp(pcValue[0], "bar")) {
|
---|
| 96 | if (!strcmp(pcParam[1], "test")) {
|
---|
| 97 | if (!strcmp(pcValue[1], "123")) {
|
---|
| 98 | return "/index.html";
|
---|
| 99 | }
|
---|
| 100 | }
|
---|
| 101 | }
|
---|
| 102 | }
|
---|
| 103 | }
|
---|
| 104 | return "/404.html";
|
---|
| 105 | }
|
---|
| 106 |
|
---|
| 107 | #endif /* LWIP_HTTPD_EXAMPLE_CGI_SIMPLE */
|
---|