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openblt/Target/Source/third_party/uip/apps/webserver/httpd.c

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/**
* \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 "uip.h"
#include "httpd.h"
#include "httpd-fs.h"
#include "httpd-cgi.h"
#include "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);
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);
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);
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);
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);
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);
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;
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));
}
/*---------------------------------------------------------------------------*/
/** @} */
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