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/**
******************************************************************************
* @file LwIP/LwIP_HTTP_Server_Socket_RTOS/Src/httpserver-socket.c
* @author MCD Application Team
* @brief Basic http server implementation using LwIP socket API
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
#include "lwip/sys.h"
#include "lwip/sockets.h"
#include "lwip/apps/fs.h"
#include "string.h"
#include "httpserver-socket.h"
#include "cmsis_os.h"
#include <stdio.h>
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define WEBSERVER_THREAD_PRIO ( osPriorityAboveNormal )
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
u32_t nPageHits = 0;
portCHAR PAGE_BODY[512];
/* Format of dynamic web page: the page header */
static const unsigned char PAGE_START[] = {
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/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
* @brief serve tcp connection
* @param conn: connection socket
* @retval None
*/
void http_server_serve(int conn)
{
int buflen = 1500;
int ret;
struct fs_file file;
unsigned char recv_buffer[1500];
/* Read in the request */
ret = read(conn, recv_buffer, buflen);
if(ret < 0) return;
/* Check if request to get ST.gif */
if (strncmp((char *)recv_buffer,"GET /STM32F4xx_files/ST.gif",27)==0)
{
fs_open(&file, "/STM32F4xx_files/ST.gif");
write(conn, (const unsigned char*)(file.data), (size_t)file.len);
fs_close(&file);
}
/* Check if request to get stm32.jpeg */
else if (strncmp((char *)recv_buffer,"GET /STM32F4xx_files/stm32.jpg",30)==0)
{
fs_open(&file, "/STM32F4xx_files/stm32.jpg");
write(conn, (const unsigned char*)(file.data), (size_t)file.len);
fs_close(&file);
}
/* Check if request to get ST logo.jpeg */
else if (strncmp((char *)recv_buffer,"GET /STM32F4xx_files/logo.jpg", 29) == 0)
{
fs_open(&file, "/STM32F4xx_files/logo.jpg");
write(conn, (const unsigned char*)(file.data), (size_t)file.len);
fs_close(&file);
}
else if(strncmp((char *)recv_buffer, "GET /STM32F4xxTASKS.html", 24) == 0)
{
/* Load dynamic page */
DynWebPage(conn);
}
else if((strncmp((char *)recv_buffer, "GET /STM32F4xx.html", 19) == 0)||(strncmp((char *)recv_buffer, "GET / ", 6) == 0))
{
/* Load STM32F4xx */
fs_open(&file, "/STM32F4xx.html");
write(conn, (const unsigned char*)(file.data), (size_t)file.len);
fs_close(&file);
}
else
{
/* Load 404 page */
fs_open(&file, "/404.html");
write(conn, (const unsigned char*)(file.data), (size_t)file.len);
fs_close(&file);
}
/* Close connection socket */
close(conn);
}
/**
* @brief http server thread
* @param arg: pointer on argument(not used here)
* @retval None
*/
static void http_server_socket_thread(void *arg)
{
int sock, newconn, size;
struct sockaddr_in address, remotehost;
/* create a TCP socket */
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
return;
}
/* bind to port 80 at any interface */
address.sin_family = AF_INET;
address.sin_port = htons(80);
address.sin_addr.s_addr = INADDR_ANY;
if (bind(sock, (struct sockaddr *)&address, sizeof (address)) < 0)
{
return;
}
/* listen for incoming connections (TCP listen backlog = 5) */
listen(sock, 5);
size = sizeof(remotehost);
while (1)
{
newconn = accept(sock, (struct sockaddr *)&remotehost, (socklen_t *)&size);
http_server_serve(newconn);
}
}
/**
* @brief Initialize the HTTP server (start its thread)
* @param none
* @retval None
*/
void http_server_socket_init()
{
sys_thread_new("HTTP", http_server_socket_thread, NULL, DEFAULT_THREAD_STACKSIZE * 2, WEBSERVER_THREAD_PRIO);
}
/**
* @brief Create and send a dynamic Web Page. This page contains the list of
* running tasks and the number of page hits.
* @param conn connection socket
* @retval None
*/
void DynWebPage(int conn)
{
portCHAR pagehits[10];
memset(PAGE_BODY, 0,512);
/* Update the hit count */
nPageHits++;
sprintf( pagehits, "%d", (int)nPageHits );
strcat(PAGE_BODY, pagehits);
strcat((char *) PAGE_BODY, "<pre><br>Name State Priority Stack Num" );
strcat((char *) PAGE_BODY, "<br>---------------------------------------------<br>");
/* The list of tasks and their status */
osThreadList((unsigned char *)(PAGE_BODY + strlen(PAGE_BODY)));
strcat((char *) PAGE_BODY, "<br><br>---------------------------------------------");
strcat((char *) PAGE_BODY, "<br>B : Blocked, R : Ready, D : Deleted, S : Suspended<br>");
/* Send the dynamically generated page */
write(conn, PAGE_START, strlen((char*)PAGE_START));
write(conn, PAGE_BODY, strlen(PAGE_BODY));
}