CCS/TM4C1294NCPDT: RTOS/TI-RTOS HTTP client POST body is empty

Tool/software: Code Composer Studio

Hi,

I'm making iot system with Ethernet.

Everything is  working well but only issue is, request's body is empty.

this is log from server. first brace is request object's header, and second brace is request object's body.

As you can see, header is good, but body is empty.

{
  host: '*host server address*',
  'content-type': 'application/x-www-form-urlencoded',
  'content-length': '14'
}

{}

this is my code

Void sendPostRequest()
{
  bool moreFlag = false;

      char responsedata[64];
      char postdata[] = "test=1&test2=2";
      int ret;
      int len;
      struct sockaddr_in addr;

      HTTPCli_Struct cli;
      HTTPCli_Field fields[3] = {
          { HTTPStd_FIELD_NAME_HOST, HOSTNAME },
          { NULL, NULL }
      };

      System_printf("Sending a HTTP GET request to '%s'\n", HOSTNAME);
      System_flush();

      HTTPCli_construct(&cli);

      HTTPCli_setRequestFields(&cli, fields);

      ret = HTTPCli_initSockAddr((struct sockaddr *)&addr, HOSTNAME, 0);
      if (ret == 0) {
        System_printf("httpTask: address resolution done\n", ret);
      }

      ret = HTTPCli_connect(&cli, (struct sockaddr *)&addr, 0, NULL);
      if (ret == 0) {
        System_printf("httpTask: connect done\n", ret);
      }

      ret = HTTPCli_sendRequest(&cli, HTTPStd_POST, REQUEST_URI, true);
      if (ret == 0) {
        System_printf("httpTask: send done\n", ret);
      }

      ret = HTTPCli_sendField(&cli, HTTPStd_FIELD_NAME_CONTENT_TYPE, "application/x-www-form-urlencoded", false);
      if (ret == 0) {
        System_printf("httpTask: send field done\n", ret);
      }
      ret = HTTPCli_sendField(&cli, HTTPStd_FIELD_NAME_CONTENT_LENGTH, "14", true);
      if (ret == 0) {
        System_printf("httpTask: send field done\n", ret);
      }

      ret = HTTPCli_sendRequestBody(&cli, postdata, strlen(postdata));
      if (ret == 0) {
        System_printf("httpTask: send body done\n", ret);
      }

      ret = HTTPCli_getResponseStatus(&cli);
      if (ret != HTTPStd_OK) {
        System_printf("httpTask: cannot get status\n", ret);
      }

      System_printf("HTTP Response Status Code: %d\n", ret);

      ret = HTTPCli_getResponseField(&cli, responsedata, sizeof(responsedata), &moreFlag);
      if (ret != HTTPCli_FIELD_ID_END) {
        System_printf("httpTask: response field processing failed\n", ret);
      }

      len = 0;
      do {
          ret = HTTPCli_readResponseBody(&cli, responsedata, sizeof(responsedata), &moreFlag);
          if (ret < 0) {
            System_printf("httpTask: response body processing failed\n", ret);
          }

          len += ret;
      } while (moreFlag);

      System_printf("Recieved %d bytes of payload\n", len);
      System_flush();

      HTTPCli_disconnect(&cli);
      HTTPCli_destruct(&cli);
}

I checked whole request object, but I couldn't find data I sent.