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/**
* @file
* HTTPD simple CGI example
*
* This file demonstrates how to add support for basic CGI.
*/
/*
* Copyright (c) 2017 Simon Goldschmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Simon Goldschmidt <goldsimon@gmx.de>
*
*/
#include "lwip/opt.h"
#include "cgi_example.h"
#include "lwip/apps/httpd.h"
#include "lwip/def.h"
#include "lwip/mem.h"
#include <stdio.h>
#include <string.h>
/** define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE to 1 to enable this cgi example */
#ifndef LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
#define LWIP_HTTPD_EXAMPLE_CGI_SIMPLE 0
#endif
#if LWIP_HTTPD_EXAMPLE_CGI_SIMPLE
#if !LWIP_HTTPD_CGI
#error LWIP_HTTPD_EXAMPLE_CGI_SIMPLE needs LWIP_HTTPD_CGI
#endif
static const char *cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
static const tCGI cgi_handlers[] = {
{
"/basic_cgi",
cgi_handler_basic
},
{
"/basic_cgi_2",
cgi_handler_basic
}
};
void
cgi_ex_init(void)
{
http_set_cgi_handlers(cgi_handlers, LWIP_ARRAYSIZE(cgi_handlers));
}
/** This basic CGI function can parse param/value pairs and return an url that
* is sent as a response by httpd.
*
* This example function just checks that the input url has two key value
* parameter pairs: "foo=bar" and "test=123"
* If not, it returns 404
*/
static const char *
cgi_handler_basic(int iIndex, int iNumParams, char *pcParam[], char *pcValue[])
{
LWIP_ASSERT("check index", iIndex < LWIP_ARRAYSIZE(cgi_handlers));
if (iNumParams == 2) {
if (!strcmp(pcParam[0], "foo")) {
if (!strcmp(pcValue[0], "bar")) {
if (!strcmp(pcParam[1], "test")) {
if (!strcmp(pcValue[1], "123")) {
return "/index.html";
}
}
}
}
}
return "/404.html";
}
#endif /* LWIP_HTTPD_EXAMPLE_CGI_SIMPLE */
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