20. Httpc client

20.1. Overview

This example explains the process of how to access the Http server to obtain data through tcp.

20.2. Usage Steps

• Prepare a usable URL and network.

• Steps to use:

  • Enter the command stack_wifi to turn on wifi in the terminal, then enter the command wifi_sta_connect <name> <key> to connect to wifi. Confirm that the wifi connection is successful (e.g.: use the command wifi_sta_connect bl_test_005 12345678).

    

    

  • Use the httpc command to download.

    

20.3. Applications

• Main process

 settings.use_proxy = 0;
 settings.result_fn = cb_httpc_result;
 settings.headers_done_fn = cb_httpc_headers_done_fn;
 httpc_get_file_dns(
         "nf.cr.dandanman.com",
         80,
         "/ddm/ContentResource/music/204.mp3",
         &settings,
         cb_altcp_recv_fn,
         &req,
         &req
);

cb_httpc_result() will be called after the http transmission is finished to print the length of the message content. cb_httpc_headers_done_fn() will be called when the http headers are received, and the size of the headers will be printed. The user can process the received message in cb_altcp_recv_fn().