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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This file is a modified version of the lwIP web server demo. The original
* author is unknown because the file didn't contain any license information.
*/
/**
* @file web.c
* @brief HTTP server wrapper thread code.
* @addtogroup WEB_THREAD
* @{
*/
#include "ch.h"
#include "lwip/opt.h"
#include "lwip/arch.h"
#include "lwip/api.h"
#include "web.h"
#if LWIP_NETCONN
static const char http_html_hdr[] = "HTTP/1.1 200 OK\r\nContent-type: text/html\r\n\r\n";
static const char http_index_html[] = "<html><head><title>Congrats!</title></head><body><h1>Welcome to our lwIP HTTP server!</h1><p>This is a small test page.</body></html>";
static void http_server_serve(struct netconn *conn) {
struct netbuf *inbuf;
char *buf;
u16_t buflen;
err_t err;
/* Read the data from the port, blocking if nothing yet there.
We assume the request (the part we care about) is in one netbuf */
err = netconn_recv(conn, &inbuf);
if (err == ERR_OK) {
netbuf_data(inbuf, (void **)&buf, &buflen);
/* Is this an HTTP GET command? (only check the first 5 chars, since
there are other formats for GET, and we're keeping it very simple )*/
if (buflen>=5 &&
buf[0]=='G' &&
buf[1]=='E' &&
buf[2]=='T' &&
buf[3]==' ' &&
buf[4]=='/' ) {
/* Send the HTML header
* subtract 1 from the size, since we dont send the \0 in the string
* NETCONN_NOCOPY: our data is const static, so no need to copy it
*/
netconn_write(conn, http_html_hdr, sizeof(http_html_hdr)-1, NETCONN_NOCOPY);
/* Send our HTML page */
netconn_write(conn, http_index_html, sizeof(http_index_html)-1, NETCONN_NOCOPY);
}
}
/* Close the connection (server closes in HTTP) */
netconn_close(conn);
/* Delete the buffer (netconn_recv gives us ownership,
so we have to make sure to deallocate the buffer) */
netbuf_delete(inbuf);
}
/**
* Stack area for the http thread.
*/
WORKING_AREA(wa_http_server, WEB_THREAD_STACK_SIZE);
/**
* HTTP server thread.
*/
msg_t http_server(void *p) {
struct netconn *conn, *newconn;
err_t err;
(void)p;
chRegSetThreadName("http");
/* Create a new TCP connection handle */
conn = netconn_new(NETCONN_TCP);
LWIP_ERROR("http_server: invalid conn", (conn != NULL), return RDY_RESET;);
/* Bind to port 80 (HTTP) with default IP address */
netconn_bind(conn, NULL, WEB_THREAD_PORT);
/* Put the connection into LISTEN state */
netconn_listen(conn);
/* Goes to the final priority after initialization.*/
chThdSetPriority(WEB_THREAD_PRIORITY);
while(1) {
err = netconn_accept(conn, &newconn);
if (err != ERR_OK)
continue;
http_server_serve(newconn);
netconn_delete(newconn);
}
return RDY_OK;
}
#endif /* LWIP_NETCONN */
/** @} */
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