how to g

[Pavel A.]

Posted on May 28, 2018 at 14:23

Try this:

struct fs_file file;

recv_err = fs_open(&file,'/STM32F4xx_files/ST.gif');

-- pa

[Jessy J]

Posted on May 28, 2018 at 16:30

here all the code for the http server based on netconn

/**

* @brief serve tcp connection * @param conn: pointer on connection structure * @retval None */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) { recv_err = 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) { recv_err = 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 */ recv_err = 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 STM32F4x7 page */ recv_err = 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 */ recv_err = 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 incoming 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(void){ sys_thread_new('HTTP', http_server_netconn_thread, NULL, DEFAULT_THREAD_STACKSIZE, osPriorityAboveNormal);}

[Tesla DeLorean]

Posted on May 28, 2018 at 14:56

It means it wants a pointer, and you provided a pointer to a pointer, ie the address of a pointer rather the address of a structure

If a function wants ptr, don't use &ptr

[Tesla DeLorean]

Posted on May 28, 2018 at 15:38

fichier != file, and the file pointer needs to actually point to some physical memory

[Tesla DeLorean]

Posted on May 28, 2018 at 16:06

The compiler is usually right, so if it is complaining something is wrong. Showing me two lines that haven't been cut-n-pasted from the failing code correctly doesn't help me diagnose the issue.

The 'file' pointer ultimately needs to point at some memory that describes some 'struct fs_file'

struct fs_file foofile;

struct fs_file *file = &foofile;recv_err = fs_open ( file, '/STM32F4xx_files/ST.gif');

[Tesla DeLorean]

Posted on May 29, 2018 at 14:44

Per examples, you're supposed to be passing a pointer to a pointer so that fs_open can fill that pointer with a 'handle' to it's own structure.

recv_err = fs_open(&file,'/STM32F4xx_files/ST.gif');

See STM32Cube_FW_F7_V1.9.0\Projects\STM32746G-Discovery\Applications\LwIP\LwIP_HTTP_Server_Netconn_RTOS\Src\httpserver-netconn.c (or equivalent)

/**

  * @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 /STM32F7xx_files/ST.gif',27)==0)        {          fs_open(&file, '/STM32F7xx_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 /STM32F7xx_files/stm32.jpg',30)==0)        {          fs_open(&file, '/STM32F7xx_files/stm32.jpg');          netconn_write(conn, (const unsigned char*)(file.data), (size_t)file.len, NETCONN_NOCOPY);          fs_close(&file);        }

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