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/**
******************************************************************************
* @file LwIP/LwIP_HTTP_Server_Netconn_RTOS/Src/httpser-netconn.c
* @author MCD Application Team
* @brief Basic http server implementation using LwIP netconn 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "lwip/apps/fs.h"
#include "string.h"
#include "httpserver-netconn.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;
/* 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: pointer on connection structure
* @retval None
*/
static void http_server_serve(struct netconn *conn)
{
struct netbuf *inbuf;
err_t recv_err;
char* buf;
u16_t buflen;
struct fs_file file;
/* Read the data from the port, blocking if nothing yet there.
We assume the request (the part we care about) is in one netbuf */
recv_err = netconn_recv(conn, &inbuf);
if (recv_err == ERR_OK)
{
if (netconn_err(conn) == 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) && (strncmp(buf, "GET /", 5) == 0))
{
/* Check if request to get ST.gif */
if (strncmp((char const *)buf,"GET /STM32F4xx_files/ST.gif",27)==0)
{
fs_open(&file, "/STM32F4xx_files/ST.gif");
netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);
fs_close(&file);
}
/* Check if request to get stm32.jpeg */
else if (strncmp((char const *)buf,"GET /STM32F4xx_files/stm32.jpg",30)==0)
{
fs_open(&file, "/STM32F4xx_files/stm32.jpg");
netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);
fs_close(&file);
}
else if (strncmp((char const *)buf,"GET /STM32F4xx_files/logo.jpg", 29) == 0)
{
/* Check if request to get ST logo.jpg */
fs_open(&file, "/STM32F4xx_files/logo.jpg");
netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);
fs_close(&file);
}
else if(strncmp(buf, "GET /STM32F4xxTASKS.html", 24) == 0)
{
/* Load dynamic page */
DynWebPage(conn);
}
else if((strncmp(buf, "GET /STM32F4xx.html", 19) == 0)||(strncmp(buf, "GET / ", 6) == 0))
{
/* Load STM32F4xx page */
fs_open(&file, "/STM32F4xx.html");
netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);
fs_close(&file);
}
else
{
/* Load Error page */
fs_open(&file, "/404.html");
netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);
fs_close(&file);
}
}
}
}
/* 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);
}
/**
* @brief http server thread
* @param arg: pointer on argument(not used here)
* @retval None
*/
static void http_server_netconn_thread(void *arg)
{
struct netconn *conn, *newconn;
err_t err, accept_err;
/* Create a new TCP connection handle */
conn = netconn_new(NETCONN_TCP);
if (conn!= NULL)
{
/* Bind to port 80 (HTTP) with default IP address */
err = netconn_bind(conn, NULL, 80);
if (err == ERR_OK)
{
/* Put the connection into LISTEN state */
netconn_listen(conn);
while(1)
{
/* accept any icoming connection */
accept_err = netconn_accept(conn, &newconn);
if(accept_err == ERR_OK)
{
/* serve connection */
http_server_serve(newconn);
/* delete connection */
netconn_delete(newconn);
}
}
}
}
}
/**
* @brief Initialize the HTTP server (start its thread)
* @param none
* @retval None
*/
void http_server_netconn_init()
{
sys_thread_new("HTTP", http_server_netconn_thread, NULL, DEFAULT_THREAD_STACKSIZE, 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 pointer on connection structure
* @retval None
*/
void DynWebPage(struct netconn *conn)
{
portCHAR PAGE_BODY[512];
portCHAR pagehits[10] = {0};
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 */
netconn_write(conn, PAGE_START, strlen((char*)PAGE_START), NETCONN_COPY);
netconn_write(conn, PAGE_BODY, strlen(PAGE_BODY), NETCONN_COPY);
}