The t_httpc_resp_write_cb definition specifies the format of the callback function that is called to pass data received in the response.
The implementation can decide how to process the data (for example, to store it in a structure or a file).
|http_req_hdl||The handle of the current request.||uint16_t|
|hdl||The internal handle returned by t_httpc_resp_open_cb().||t_httpc_user_hdl|
|p_buf||Where to write the data received.||uint8_t *|
|buf_len||The length of the data received.||uint16_t|