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