AzureRTOS + HTTP WebServer and MULTIPART transfer

[Davide Dalfra]

Hi All,

I've succesfully implemented an HTTP WebServer into our application running AzureRTOS on a STM32F429.
I'm now moving to data transfer over HTTP, in order to have a Web page (entry point) for transfering a binary file (encrypted) to remote update the board on the field.
The flow is something as follow:
Web Page -> load file (encrypted) -> save file payload in binary on ext flash (in raw, no FS).
Then issue a reboot (bootlaoder will read the file & calculate the crc) and then flash the MCU if everything match.

In order to transfer correctly the file i had to enable NX_HTTP_MULTIPART_ENABLE , but i was wondering if there's a good point to start with some example (docs are not so exaustive).

Right now for receving the file i do :

UCHAR buffer[1440] = { 0 }; 
if ( strcmp(resource, "/upload.php") == 0 && request_type == NX_WEB_HTTP_SERVER_POST_REQUEST )
  {
    ULONG len = 0;
    ULONG offset = 0;

    fwu_start();

    while( nx_web_http_server_get_entity_header(server_ptr,&packet_ptr, buffer, sizeof(buffer)) == NX_SUCCESS )
    {
      while( nx_web_http_server_get_entity_content(server_ptr, &packet_ptr, &offset,&len) == NX_SUCCESS )
      {
        nx_packet_data_extract_offset(packet_ptr,offset, buffer, len, &len);
        buffer[len] = 0;
        fwu_raw_write((uint8_t*)buffer, (size_t)len);
      }
    }

    nx_web_http_server_type_get(server_ptr, server_ptr -> nx_web_http_server_request_resource, temp_string, &string_length);
    status = nx_web_http_server_callback_generate_response_header(server_ptr, &resp_packet_ptr, NX_WEB_HTTP_STATUS_OK,
                                                                0, "", NX_NULL); 
    if(status == NX_SUCCESS)
    {
      status =nx_web_http_server_callback_packet_send(server_ptr, resp_packet_ptr);
      if(status != NX_SUCCESS)
      {
          nx_packet_release(resp_packet_ptr);
          return status;
      }
      
    }
    else
    {
      return NX_SUCCESS;
    }
  }

Is there any better way to do that? is that the right way?

Thanks all in advance

Davide

[Davide Dalfra · Accepted solution]

For those who will fall into this post looking for a solution, i can confirm the one i posted here is working.
Spent few days across MS documentation and example, fixed some stuff at my side too but that's working correctly.

Thanks

Davide