mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2024-12-27 06:14:09 +00:00
ac46e42aa2
... from http://git.savannah.gnu.org/cgit/lwip/lwip-contrib.git/ into contrib/ subdir, STABLE-2_1_0_RELEASE tag lwIP contrib is now officially frozen TODO: Fix build
265 lines
7.5 KiB
C
265 lines
7.5 KiB
C
/**
|
|
* @file
|
|
* HTTPD simple SSI example
|
|
*
|
|
* This file demonstrates how to add support for SSI.
|
|
* It does this in a very simple way by providing the three tags 'HelloWorld'
|
|
* 'counter', and 'MultiPart'.
|
|
*
|
|
* This file also demonstrates how to integrate CGI with SSI.
|
|
*/
|
|
|
|
/*
|
|
* 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 "ssi_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_SSI_SIMPLE to 1 to enable this ssi example*/
|
|
#ifndef LWIP_HTTPD_EXAMPLE_SSI_SIMPLE
|
|
#define LWIP_HTTPD_EXAMPLE_SSI_SIMPLE 0
|
|
#endif
|
|
|
|
/** define LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION to 1 to show how to
|
|
* integrate CGI into SSI (LWIP_HTTPD_CGI_SSI) */
|
|
#ifndef LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION
|
|
#define LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION 0
|
|
#endif
|
|
|
|
#if LWIP_HTTPD_EXAMPLE_SSI_SIMPLE
|
|
|
|
#if LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION
|
|
#if !LWIP_HTTPD_FILE_STATE
|
|
#error LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION needs LWIP_HTTPD_FILE_STATE
|
|
#endif
|
|
#if !LWIP_HTTPD_CGI_SSI
|
|
#error LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION needs LWIP_HTTPD_CGI_SSI
|
|
#endif
|
|
|
|
#define MAX_CGI_LEN 16
|
|
#endif
|
|
|
|
const char * ssi_example_tags[] = {
|
|
"HellWorl",
|
|
"counter",
|
|
"MultPart"
|
|
#if LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION
|
|
,"CgiParam"
|
|
#endif
|
|
};
|
|
|
|
u16_t ssi_example_ssi_handler(
|
|
#if LWIP_HTTPD_SSI_RAW
|
|
const char* ssi_tag_name,
|
|
#else /* LWIP_HTTPD_SSI_RAW */
|
|
int iIndex,
|
|
#endif /* LWIP_HTTPD_SSI_RAW */
|
|
char *pcInsert, int iInsertLen
|
|
#if LWIP_HTTPD_SSI_MULTIPART
|
|
, u16_t current_tag_part, u16_t *next_tag_part
|
|
#endif /* LWIP_HTTPD_SSI_MULTIPART */
|
|
#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
|
|
, void *connection_state
|
|
#endif /* LWIP_HTTPD_FILE_STATE */
|
|
)
|
|
{
|
|
size_t printed;
|
|
#if LWIP_HTTPD_SSI_RAW
|
|
/* a real application could use if(!strcmp) blocks here, but we want to keep
|
|
the differences between configurations small, so translate string to index here */
|
|
int iIndex;
|
|
for (iIndex = 0; iIndex < LWIP_ARRAYSIZE(ssi_example_tags); iIndex++) {
|
|
if(!strcmp(ssi_tag_name, ssi_example_tags[iIndex])) {
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
|
|
LWIP_UNUSED_ARG(connection_state);
|
|
#endif
|
|
|
|
switch (iIndex) {
|
|
case 0: /* "HelloWorld" */
|
|
printed = snprintf(pcInsert, iInsertLen, "Hello World!");
|
|
break;
|
|
case 1: /* "counter" */
|
|
{
|
|
static int counter;
|
|
counter++;
|
|
printed = snprintf(pcInsert, iInsertLen, "%d", counter);
|
|
}
|
|
break;
|
|
case 2: /* "MultPart" */
|
|
#if LWIP_HTTPD_SSI_MULTIPART
|
|
switch (current_tag_part) {
|
|
case 0:
|
|
printed = snprintf(pcInsert, iInsertLen, "part0");
|
|
*next_tag_part = 1;
|
|
break;
|
|
case 1:
|
|
printed = snprintf(pcInsert, iInsertLen, "part1");
|
|
*next_tag_part = 2;
|
|
break;
|
|
case 2:
|
|
printed = snprintf(pcInsert, iInsertLen, "part2");
|
|
break;
|
|
default:
|
|
printed = snprintf(pcInsert, iInsertLen, "unhandled part: %d", (int)current_tag_part);
|
|
break;
|
|
}
|
|
#else
|
|
printed = snprintf(pcInsert, iInsertLen, "LWIP_HTTPD_SSI_MULTIPART disabled");
|
|
#endif
|
|
break;
|
|
#if LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION
|
|
case 3:
|
|
if (connection_state) {
|
|
char *params = (char *)connection_state;
|
|
if (*params) {
|
|
printed = snprintf(pcInsert, iInsertLen, "%s", (char *)params);
|
|
} else {
|
|
printed = snprintf(pcInsert, iInsertLen, "none");
|
|
}
|
|
} else {
|
|
printed = snprintf(pcInsert, iInsertLen, "NULL");
|
|
}
|
|
break;
|
|
#endif
|
|
default: /* unknown tag */
|
|
printed = 0;
|
|
break;
|
|
}
|
|
LWIP_ASSERT("sane length", printed <= 0xFFFF);
|
|
return (u16_t)printed;
|
|
}
|
|
|
|
void
|
|
ssi_ex_init(void)
|
|
{
|
|
int i;
|
|
for (i = 0; i < LWIP_ARRAYSIZE(ssi_example_tags); i++) {
|
|
LWIP_ASSERT("tag too long for LWIP_HTTPD_MAX_TAG_NAME_LEN",
|
|
strlen(ssi_example_tags[i]) <= LWIP_HTTPD_MAX_TAG_NAME_LEN);
|
|
}
|
|
|
|
http_set_ssi_handler(ssi_example_ssi_handler,
|
|
#if LWIP_HTTPD_SSI_RAW
|
|
NULL, 0
|
|
#else
|
|
ssi_example_tags, LWIP_ARRAYSIZE(ssi_example_tags)
|
|
#endif
|
|
);
|
|
}
|
|
|
|
#if LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION
|
|
void *
|
|
fs_state_init(struct fs_file *file, const char *name)
|
|
{
|
|
char *ret;
|
|
LWIP_UNUSED_ARG(file);
|
|
LWIP_UNUSED_ARG(name);
|
|
ret = (char *)mem_malloc(MAX_CGI_LEN);
|
|
if (ret) {
|
|
*ret = 0;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
fs_state_free(struct fs_file *file, void *state)
|
|
{
|
|
LWIP_UNUSED_ARG(file);
|
|
if (state != NULL) {
|
|
mem_free(state);
|
|
}
|
|
}
|
|
|
|
void
|
|
httpd_cgi_handler(struct fs_file *file, const char* uri, int iNumParams,
|
|
char **pcParam, char **pcValue
|
|
#if defined(LWIP_HTTPD_FILE_STATE) && LWIP_HTTPD_FILE_STATE
|
|
, void *connection_state
|
|
#endif /* LWIP_HTTPD_FILE_STATE */
|
|
)
|
|
{
|
|
LWIP_UNUSED_ARG(file);
|
|
LWIP_UNUSED_ARG(uri);
|
|
if (connection_state != NULL) {
|
|
char *start = (char *)connection_state;
|
|
char *end = start + MAX_CGI_LEN;
|
|
int i;
|
|
memset(start, 0, MAX_CGI_LEN);
|
|
/* print a string of the arguments: */
|
|
for (i = 0; i < iNumParams; i++) {
|
|
size_t len;
|
|
len = end - start;
|
|
if (len) {
|
|
size_t inlen = strlen(pcParam[i]);
|
|
size_t copylen = LWIP_MIN(inlen, len);
|
|
memcpy(start, pcParam[i], copylen);
|
|
start += copylen;
|
|
len -= copylen;
|
|
}
|
|
if (len) {
|
|
*start = '=';
|
|
start++;
|
|
len--;
|
|
}
|
|
if (len) {
|
|
size_t inlen = strlen(pcValue[i]);
|
|
size_t copylen = LWIP_MIN(inlen, len);
|
|
memcpy(start, pcValue[i], copylen);
|
|
start += copylen;
|
|
len -= copylen;
|
|
}
|
|
if (len) {
|
|
*start = ';';
|
|
len--;
|
|
}
|
|
/* ensure NULL termination */
|
|
end--;
|
|
*end = 0;
|
|
}
|
|
}
|
|
}
|
|
#endif /* LWIP_HTTPD_EXAMPLE_SSI_SIMPLE_CGI_INTEGRATION */
|
|
|
|
#endif /* LWIP_HTTPD_EXAMPLE_SSI_SIMPLE */
|