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107 lines
3.2 KiB
107 lines
3.2 KiB
/** |
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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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