Sdk: SocketException sometimes reports the incorrect port

[YawWashout]

Hello, I am trying to make a http get request with the following code:

        var uri = new Uri.http('10.125.32.128:10000', '/keyboard');
        print("Targeting " + uri.toString());
        http.get(uri).then((response) {
          print(response);
        });

In the console error, I unfortunately get this response:

flutter: Targeting http://10.125.32.128:10000/keyboard
[VERBOSE-2:shell.cc(184)] Dart Error: Unhandled exception:
SocketException: OS Error: Operation timed out, errno = 60, address = 10.125.32.128, port = 56325

I have assigned port 10000, but the error message says port 56325 is rejected. I have specified and seems to change the port number randomly that it's targeting. Is there a different way I should be specifying the port #?

Note: I am using:

dev_dependencies:
  flutter_test:
    sdk: flutter
  http: ^0.12.0+1

[craiglabenz]

Update: This has nothing to do with the http library. Check out my other comment below.

---

~I suspect that something else is wrong and leading to this misleading error message, but fwiw, I am seeing the same error when building to Android simulators on MacOS.~

~Confirmed the error on 0.12.0+1 and 0.12.0+2.~

[natebosch]

Can you try this request with dart:io directly? I don't think there is anything we can do to solve this in this package and the bug probably needs to be filed against the SDK.

[DouglasDRF]

I'm having the same issue, but on Android, I can reach the endpoint with Google Chorme (which means that is not the host misconfigured or the firewall blocking the connection) but I can't reach it with with http.get method

[jonasfj]

@DouglasDRF, same server or different server?

Does it hang, or is it a different bug? Does it work on desktop?

[tim-holbrook]

I'm seeing the same as @Deftness, it looks like a bug. The port number in the string is being ignored no matter how you try to specify it, and simply issues a random one like 35708 when I want to use 8080. Please can you fix this and write a failing test first, thx, as it's stopped my current work flow.

[georgeherby]

@Deftness This code worked for me

import 'package:http/http.dart' as http;

main() {
  var client = new http.Client();

  var uri = Uri.parse("http://127.0.0.1:8080");
  print(uri.host);
  print(uri.port);

  client.get(uri).then((response) {
    print("Get " + response.body);
  });

  var body =
      """{"name": "Order",  "location": "in_store",  "items": [  {  "milk": "whole",  "size": "medium",  "drink": "americano"}]}""";

  client.post("http://127.0.0.1:8080/order", body: body).then((response) {
    print("Post " + response.statusCode.toString());
  });
}

@tim-holbrook has confirmed this worked for him.

When using the HttpClient in dart:io i get issues with port not being used but as dart:http is now independent of dart:io this is fine. I guess there is an issue in dart:io around parsing with ports @natebosch

[craiglabenz]

This SO post very likely contains your answer.

[georgeherby]

When testing this issue I just used dart and ran on a command line, no flutter or emulator, for which I used and external IP. I just swapped in the above example as to not publicly share it.

[natebosch]

Moved to the SDK repo since it's not specific to package:http. I wonder if the issue is strictly in the error message...

[georgeherby]

So I agree with @natebosch I believe this is just an issue with the error message.

This code works fine with custom ports (yes its a bit dirty but proves the SDK is fine)

import 'dart:async';
import 'dart:convert';
import 'dart:io';

readResponse(HttpClientResponse response) async {
  var completer = Completer();
  var contents = StringBuffer();
  response.transform(utf8.decoder).listen((data) {
    contents.write(data);
  }, onDone: () => completer.complete(contents.toString()));
  return await completer.future;
}

main() async {
  var uri = Uri.parse("http://10.0.0.1:6100/get_status");
  print(uri.host); // 10.0.0.1
  print(uri.port); // 6100
  print(uri.path); // get_status

  HttpClient client = new HttpClient();
  HttpClientRequest request = await client.getUrl(uri);
  HttpClientResponse response = await request.close();
  print(readResponse(response));

  var uri2 = Uri.http('10.0.0.1:5100', 'get_status');
  print(uri2.host); //10.0.0.1
  print(uri2.port); // 5100
  print(uri2.path); // get_status

  HttpClientRequest request2 = await client.getUrl(uri2);
  HttpClientResponse response2 = await request2.close();
  print(readResponse(response2));
}

However, if I change the port to something that does not have anything on it I get an error with the correct IP but the port is not the correct one
SocketException: OS Error: Connection refused, errno = 61, address = 10.0.0.1, port = 54044

I am not opposed to changing the title of this issue?

[georgeherby]

Looks like there are few reporting the same issue under different situations

36674 #12693

[natebosch]

Thanks @georgeherby ! Will close as a duplicate of #12693 which has the most context.

[AbeerSul]

none of this actually worked for me :/
this command worked like magic "adb reverse tcp:5000 tcp:5000" 💯

[kamilk91]

I tried to find how to resolve this issue. Nothing worked for me. Just turned on my wifi.

[Kushagrasri]

i tried everything, working on emulator, android, but the same issue appeared all the time.

even tried adb reverse tcp:port tcp:port

then i used an application called _ngrok_ which redirects to your localhost:port.
still, i was getting the same error.

then, i disabled windows firewall and eureka!!!!

hope this helps someone.

[compazizo]

I have also got same problem. I get normally api data from browser (localhost, myPort). When tried to call api from flutter, I got error that details are "Connection timeout .. address=right IpAddress, but port= incorrected(randomly set port number)". Any help?

[Kushagrasri]

I have also got same problem. I get normally api data from browser (localhost, myPort). When tried to call api from flutter, I got error that details are "Connection timeout .. address=right IpAddress, but port= incorrected(randomly set port number)". Any help?

Try disabling the windows firewall completely. It worked for me.