📄 basicweb.c
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/*This file has been prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
*
* \brief Basic WEB Server for AVR32 UC3.
*
* - Compiler: GNU GCC for AVR32
* - Supported devices: All AVR32 devices can be used.
* - AppNote:
*
* \author Atmel Corporation: http://www.atmel.com \n
* Support and FAQ: http://support.atmel.no/
*
*****************************************************************************/
/* Copyright (c) 2007, Atmel Corporation 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 ATMEL may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL ``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 EXPRESSLY AND
* SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*/
/*
Implements a simplistic WEB server. Every time a connection is made and
data is received a dynamic page that shows the current FreeRTOS.org kernel
statistics is generated and returned. The connection is then closed.
This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
party.
*/
#if (HTTP_USED == 1)
/* Standard includes. */
#include <stdio.h>
#include <string.h>
#include "conf_eth.h"
/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
#include "partest.h"
#include "serial.h"
/* Demo includes. */
/* Demo app includes. */
#include "portmacro.h"
/* lwIP includes. */
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include "netif/loopif.h"
/* ethernet includes */
#include "ethernet.h"
/*! The size of the buffer in which the dynamic WEB page is created. */
#define webMAX_PAGE_SIZE 512
/*! Standard GET response. */
#define webHTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
/*! The port on which we listen. */
#define webHTTP_PORT ( 80 )
/*! Delay on close error. */
#define webSHORT_DELAY ( 10 )
/*! Format of the dynamic page that is returned on each connection. */
#define webHTML_START \
"<html>\
<head>\
</head>\
<BODY onLoad=\"window.setTimeout("location.href='index.html'",1000)\" bgcolor=\"#FFFFFF\" text=\"#2477E6\">\
\r\nPage Hits = "
#define webHTML_END \
"\r\n</pre>\
\r\n</font></BODY>\
</html>"
portCHAR cDynamicPage[ webMAX_PAGE_SIZE ];
portCHAR cPageHits[ 11 ];
/*! Function to process the current connection */
static void prvweb_ParseHTMLRequest( struct netconn *pxNetCon );
/*! \brief WEB server main task
* check for incoming connection and process it
*
* \param pvParameters Input. Not Used.
*
*/
portTASK_FUNCTION( vBasicWEBServer, pvParameters )
{
struct netconn *pxHTTPListener, *pxNewConnection;
/* Create a new tcp connection handle */
pxHTTPListener = netconn_new( NETCONN_TCP );
netconn_bind(pxHTTPListener, NULL, webHTTP_PORT );
netconn_listen( pxHTTPListener );
/* Loop forever */
for( ;; )
{
/* Wait for a first connection. */
pxNewConnection = netconn_accept(pxHTTPListener);
vParTestSetLED(webCONN_LED, pdTRUE);
if(pxNewConnection != NULL)
{
prvweb_ParseHTMLRequest(pxNewConnection);
}/* end if new connection */
vParTestSetLED(webCONN_LED, pdFALSE);
} /* end infinite loop */
}
/*! \brief parse the incoming request
* parse the HTML request and send file
*
* \param pxNetCon Input. The netconn to use to send and receive data.
*
*/
static void prvweb_ParseHTMLRequest( struct netconn *pxNetCon )
{
struct netbuf *pxRxBuffer;
portCHAR *pcRxString;
unsigned portSHORT usLength;
static unsigned portLONG ulPageHits = 0;
/* We expect to immediately get data. */
pxRxBuffer = netconn_recv( pxNetCon );
if( pxRxBuffer != NULL )
{
/* Where is the data? */
netbuf_data( pxRxBuffer, ( void * ) &pcRxString, &usLength );
/* Is this a GET? We don't handle anything else. */
if( !strncmp( pcRxString, "GET", 3 ) )
{
pcRxString = cDynamicPage;
/* Update the hit count. */
ulPageHits++;
sprintf( cPageHits, "%d", (int)ulPageHits );
/* Write out the HTTP OK header. */
netconn_write( pxNetCon, webHTTP_OK, (u16_t) strlen( webHTTP_OK ), NETCONN_COPY );
/* Generate the dynamic page... First the page header. */
strcpy( cDynamicPage, webHTML_START );
/* ... Then the hit count... */
strcat( cDynamicPage, cPageHits );
strcat( cDynamicPage, "<p><pre>Task State Priority Stack #<br>************************************************<br>" );
/* ... Then the list of tasks and their status... */
vTaskList( ( signed portCHAR * ) cDynamicPage + strlen( cDynamicPage ) );
/* ... Finally the page footer. */
strcat( cDynamicPage, webHTML_END );
/* Write out the dynamically generated page. */
netconn_write( pxNetCon, cDynamicPage, (u16_t) strlen( cDynamicPage ), NETCONN_COPY );
}
netbuf_delete( pxRxBuffer );
}
netconn_close( pxNetCon );
netconn_delete( pxNetCon );
}
#endif
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