Sending a HTTP request in Swift and getting 1001, 999 errors

Question

I have been given the following lines of code, which aim to send a value to an IP in Java. According to my understanding, it seems to be a GET method. But, there is no parameter being sent. Feel free to correct me, as I am fully illiterate in android programming.

private class Background_get extends AsyncTask<String, Void, String> {
  @Override
  protected String doInBackground(String... params) {
    try {
      /* Change the IP to the IP you set in the arduino sketch */
      URL url = new URL("http://192.168.43.142/?" + params[0]);
      HttpURLConnection connection = (HttpURLConnection) url.openConnection();
      connection.setConnectTimeout(10000);
      BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
      StringBuilder result = new StringBuilder();
      String inputLine;
      while ((inputLine = in.readLine()) != null)
        result.append(inputLine).append("\n");
      in.close();
      connection.disconnect();
      return result.toString();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return null;
  }
}

Receiver of this is an arduino and the way it processes sent data is through checking and comparing the last character. For further clarification, please refer to the following lines :

  char c = client.read();
        Serial.write(c);
        buffered +=c;
        if(buffered.endsWith("O")){ // this is for TV
           //digitalWrite(pin2,HIGH);
           irsend.sendPanasonic(0x4004,0x100BCBD);    
           delay(100);
         } else if (buffered.endsWith("X")) {
          irsend.sendPanasonic(0x4004,0x1004C4D); 
         } else if (buffered.endsWith("P")) {
          irsend.sendPanasonic(0x4004,0x1000405); 
         } else if (buffered.endsWith("M")) {
          irsend.sendPanasonic(0x4004,0x1008485); 
         } else if (buffered.endsWith("1"))

What I have currently done here is first to setup the info.plist for the HTTP communication like so :

<key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <false/>
        <key>NSExceptionDomains</key>
        <dict>
            <key>192.168.43.142</key> 
            <dict>
                <key>NSIncludesSubdomains</key>
                <true/>
                <key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
                <true/>
                <key>NSTemporaryExceptionMinimumTLSVersion</key>
                <string>TLSv1.1</string>
            </dict>
        </dict>
    </dict>

And here I define my IP address :

enum API : String {
    case url = "http://192.168.43.142/?"

}

and I use it in the following way :

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         var httpRequest = API.url.rawValue
        let clicked_btn = indexPath.row
        switch clicked_btn {

        case 0 :

            httpRequest = "\(httpRequest)CP"


        case 1 :
           httpRequest = "\(httpRequest)1"


        case 2 :
            httpRequest = "\(httpRequest)2"

        case 3 :
            httpRequest = "\(httpRequest)3"

        case 4 :
            httpRequest = "\(httpRequest)CM"

        case 5:
           httpRequest = "\(httpRequest)4"

        case 6 :
            httpRequest = "\(httpRequest)5"

        case 7 :
            httpRequest = "\(httpRequest)6"
        case 8 :
            httpRequest = "\(httpRequest)P"

        case 9 :
            httpRequest = "\(httpRequest)7"

        case 10 :
            httpRequest = "\(httpRequest)8"

        case 11:
            httpRequest = "\(httpRequest)9"

        case 12 :
            httpRequest = "\(httpRequest)M"

        case 13 :
            httpRequest = "\(httpRequest)X"
        case 14 :
            httpRequest = "\(httpRequest)0"

        case 15 :
            httpRequest = "\(httpRequest)O"


        default :
            print("deaf")
            break
    }
        //send the HTTP Request :
        print( "my http request is ====> \(httpRequest)")

        let url = URL(string: "\(httpRequest)")!
        let request = URLRequest(url: url)

        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
            //do stuff with data, response, error
            print("Response : \(response)")


        }

        task.resume()

}

The problem here is that I keep getting the following error in the console.I have no idea where am I making mistake. I have checked most of the other similar questions but could not figure any answer.

 my http request is ====> http://192.168.43.142/?O
    2018-03-02 19:06:43.749016+0800 Master_Project[1687:584006] Task <8BCA1C8B-6571-491D-85D7-97BE6633E720>.<1> finished with error - code: -1001
    2018-03-02 19:06:43.766883+0800 Master_Project[1687:584006] Task <8BCA1C8B-6571-491D-85D7-97BE6633E720>.<1> HTTP load failed (error code: -999 [1:89])
    Response : nil

I strongly appreciate your kind help. It's worth mentioning that I have tried this both on simulator and the real device and they both ended up giving me the same error

score 1 · Accepted Answer · answered Mar 02 '18 at 11:37

The error code -1001 mean that your connection timed out. Looks like your setup fails to connect to the server. For testing purpose you could make your NSAppTransportSecurity settings simpler and just set NSAllowsArbitraryLoads to true; if the connection works this way you know it's related to the configuration.

Here's a list of some network-related error codes.

Sending a HTTP request in Swift and getting 1001, 999 errors

1 Answers1