/** | |
* \addtogroup apps | |
* @{ | |
*/ | |
/** | |
* \defgroup httpd Web server | |
* @{ | |
* The uIP web server is a very simplistic implementation of an HTTP | |
* server. It can serve web pages and files from a read-only ROM | |
* filesystem, and provides a very small scripting language. | |
*/ | |
/** | |
* \file | |
* Web server | |
* \author | |
* Adam Dunkels <adam@sics.se> | |
*/ | |
/* | |
* Copyright (c) 2004, Adam Dunkels. | |
* 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. Neither the name of the Institute nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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 uIP TCP/IP stack. | |
* | |
* Author: Adam Dunkels <adam@sics.se> | |
* | |
* $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $ | |
*/ | |
#include "net/uip.h" | |
#include "apps/httpd/httpd.h" | |
#include "apps/httpd/httpd-fs.h" | |
#include "apps/httpd/httpd-cgi.h" | |
#include "apps/httpd/http-strings.h" | |
#include <string.h> | |
#define STATE_WAITING 0 | |
#define STATE_OUTPUT 1 | |
#define ISO_nl 0x0a | |
#define ISO_space 0x20 | |
#define ISO_bang 0x21 | |
#define ISO_percent 0x25 | |
#define ISO_period 0x2e | |
#define ISO_slash 0x2f | |
#define ISO_colon 0x3a | |
/*---------------------------------------------------------------------------*/ | |
static unsigned short generate_part_of_file( void *state ) | |
{ | |
struct httpd_state *s = ( struct httpd_state * ) state; | |
if( s->file.len > uip_mss() ) | |
{ | |
s->len = uip_mss(); | |
} | |
else | |
{ | |
s->len = s->file.len; | |
} | |
memcpy( uip_appdata, s->file.data, s->len ); | |
return s->len; | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( send_file ( struct httpd_state *s ) ) | |
{ | |
PSOCK_BEGIN( &s->sout ); | |
( void ) PT_YIELD_FLAG; | |
do | |
{ | |
PSOCK_GENERATOR_SEND( &s->sout, generate_part_of_file, s ); | |
s->file.len -= s->len; | |
s->file.data += s->len; | |
} while( s->file.len > 0 ); | |
PSOCK_END( &s->sout ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( send_part_of_file ( struct httpd_state *s ) ) | |
{ | |
PSOCK_BEGIN( &s->sout ); | |
( void ) PT_YIELD_FLAG; | |
PSOCK_SEND( &s->sout, s->file.data, s->len ); | |
PSOCK_END( &s->sout ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static void next_scriptstate( struct httpd_state *s ) | |
{ | |
char *p; | |
p = strchr( s->scriptptr, ISO_nl ) + 1; | |
s->scriptlen -= ( unsigned short ) ( p - s->scriptptr ); | |
s->scriptptr = p; | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( handle_script ( struct httpd_state *s ) ) | |
{ | |
char *ptr; | |
PT_BEGIN( &s->scriptpt ); | |
( void ) PT_YIELD_FLAG; | |
while( s->file.len > 0 ) | |
{ | |
/* Check if we should start executing a script. */ | |
if( *s->file.data == ISO_percent && *(s->file.data + 1) == ISO_bang ) | |
{ | |
s->scriptptr = s->file.data + 3; | |
s->scriptlen = s->file.len - 3; | |
if( *(s->scriptptr - 1) == ISO_colon ) | |
{ | |
httpd_fs_open( s->scriptptr + 1, &s->file ); | |
PT_WAIT_THREAD( &s->scriptpt, send_file(s) ); | |
} | |
else | |
{ | |
PT_WAIT_THREAD( &s->scriptpt, httpd_cgi(s->scriptptr) (s, s->scriptptr) ); | |
} | |
next_scriptstate( s ); | |
/* The script is over, so we reset the pointers and continue | |
sending the rest of the file. */ | |
s->file.data = s->scriptptr; | |
s->file.len = s->scriptlen; | |
} | |
else | |
{ | |
/* See if we find the start of script marker in the block of HTML | |
to be sent. */ | |
if( s->file.len > uip_mss() ) | |
{ | |
s->len = uip_mss(); | |
} | |
else | |
{ | |
s->len = s->file.len; | |
} | |
if( *s->file.data == ISO_percent ) | |
{ | |
ptr = strchr( s->file.data + 1, ISO_percent ); | |
} | |
else | |
{ | |
ptr = strchr( s->file.data, ISO_percent ); | |
} | |
if( ptr != NULL && ptr != s->file.data ) | |
{ | |
s->len = ( int ) ( ptr - s->file.data ); | |
if( s->len >= uip_mss() ) | |
{ | |
s->len = uip_mss(); | |
} | |
} | |
PT_WAIT_THREAD( &s->scriptpt, send_part_of_file(s) ); | |
s->file.data += s->len; | |
s->file.len -= s->len; | |
} | |
} | |
PT_END( &s->scriptpt ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( send_headers ( struct httpd_state *s, const char *statushdr ) ) | |
{ | |
char *ptr; | |
PSOCK_BEGIN( &s->sout ); | |
( void ) PT_YIELD_FLAG; | |
PSOCK_SEND_STR( &s->sout, statushdr ); | |
ptr = strrchr( s->filename, ISO_period ); | |
if( ptr == NULL ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_binary ); | |
} | |
else if( strncmp(http_html, ptr, 5) == 0 || strncmp(http_shtml, ptr, 6) == 0 ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_html ); | |
} | |
else if( strncmp(http_css, ptr, 4) == 0 ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_css ); | |
} | |
else if( strncmp(http_png, ptr, 4) == 0 ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_png ); | |
} | |
else if( strncmp(http_gif, ptr, 4) == 0 ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_gif ); | |
} | |
else if( strncmp(http_jpg, ptr, 4) == 0 ) | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_jpg ); | |
} | |
else | |
{ | |
PSOCK_SEND_STR( &s->sout, http_content_type_plain ); | |
} | |
PSOCK_END( &s->sout ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( handle_output ( struct httpd_state *s ) ) | |
{ | |
char *ptr; | |
PT_BEGIN( &s->outputpt ); | |
( void ) PT_YIELD_FLAG; | |
if( !httpd_fs_open(s->filename, &s->file) ) | |
{ | |
httpd_fs_open( http_404_html, &s->file ); | |
strcpy( s->filename, http_404_html ); | |
PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_404) ); | |
PT_WAIT_THREAD( &s->outputpt, send_file(s) ); | |
} | |
else | |
{ | |
PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_200) ); | |
ptr = strchr( s->filename, ISO_period ); | |
if( ptr != NULL && strncmp(ptr, http_shtml, 6) == 0 ) | |
{ | |
PT_INIT( &s->scriptpt ); | |
PT_WAIT_THREAD( &s->outputpt, handle_script(s) ); | |
} | |
else | |
{ | |
PT_WAIT_THREAD( &s->outputpt, send_file(s) ); | |
} | |
} | |
PSOCK_CLOSE( &s->sout ); | |
PT_END( &s->outputpt ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static PT_THREAD( handle_input ( struct httpd_state *s ) ) | |
{ | |
PSOCK_BEGIN( &s->sin ); | |
( void ) PT_YIELD_FLAG; | |
PSOCK_READTO( &s->sin, ISO_space ); | |
if( strncmp(s->inputbuf, http_get, 4) != 0 ) | |
{ | |
PSOCK_CLOSE_EXIT( &s->sin ); | |
} | |
PSOCK_READTO( &s->sin, ISO_space ); | |
if( s->inputbuf[0] != ISO_slash ) | |
{ | |
PSOCK_CLOSE_EXIT( &s->sin ); | |
} | |
if( s->inputbuf[1] == ISO_space ) | |
{ | |
strncpy( s->filename, http_index_html, sizeof(s->filename) ); | |
} | |
else | |
{ | |
s->inputbuf[PSOCK_DATALEN( &s->sin ) - 1] = 0; | |
/* Process any form input being sent to the server. */ | |
#if UIP_CONF_PROCESS_HTTPD_FORMS == 1 | |
{ | |
extern void vApplicationProcessFormInput( char *pcInputString ); | |
vApplicationProcessFormInput( s->inputbuf ); | |
} | |
#endif | |
strncpy( s->filename, &s->inputbuf[0], sizeof(s->filename) ); | |
} | |
/* httpd_log_file(uip_conn->ripaddr, s->filename);*/ | |
s->state = STATE_OUTPUT; | |
while( 1 ) | |
{ | |
PSOCK_READTO( &s->sin, ISO_nl ); | |
if( strncmp(s->inputbuf, http_referer, 8) == 0 ) | |
{ | |
s->inputbuf[PSOCK_DATALEN( &s->sin ) - 2] = 0; | |
/* httpd_log(&s->inputbuf[9]);*/ | |
} | |
} | |
PSOCK_END( &s->sin ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
static void handle_connection( struct httpd_state *s ) | |
{ | |
handle_input( s ); | |
if( s->state == STATE_OUTPUT ) | |
{ | |
handle_output( s ); | |
} | |
} | |
/*---------------------------------------------------------------------------*/ | |
void httpd_appcall( void ) | |
{ | |
struct httpd_state *s = ( struct httpd_state * ) &( uip_conn->appstate ); | |
if( uip_closed() || uip_aborted() || uip_timedout() ) | |
{ | |
} | |
else if( uip_connected() ) | |
{ | |
PSOCK_INIT( &s->sin, s->inputbuf, sizeof(s->inputbuf) - 1 ); | |
PSOCK_INIT( &s->sout, s->inputbuf, sizeof(s->inputbuf) - 1 ); | |
PT_INIT( &s->outputpt ); | |
s->state = STATE_WAITING; | |
/* timer_set(&s->timer, CLOCK_SECOND * 100);*/ | |
s->timer = 0; | |
handle_connection( s ); | |
} | |
else if( s != NULL ) | |
{ | |
if( uip_poll() ) | |
{ | |
++s->timer; | |
if( s->timer >= 20 ) | |
{ | |
uip_abort(); | |
} | |
} | |
else | |
{ | |
s->timer = 0; | |
} | |
handle_connection( s ); | |
} | |
else | |
{ | |
uip_abort(); | |
} | |
} | |
/*---------------------------------------------------------------------------*/ | |
/** | |
* \brief Initialize the web server | |
* | |
* This function initializes the web server and should be | |
* called at system boot-up. | |
*/ | |
void httpd_init( void ) | |
{ | |
uip_listen( HTONS(80) ); | |
} | |
/*---------------------------------------------------------------------------*/ | |
/** @} */ |