Mary Mary - 3 years ago 436
Dart Question

How to point to localhost:8000 with the Dart http package in Flutter?

I'm following the Flutter Networking/HTTP tutorial to do a GET request to a server running on my localhost:8000. Visiting my localhost via my browser works fine. My code looks like this:

var url = 'http://localhost:8000';
Future<String> getUnits(String category) async {
var response = await httpClient.get('$url/$category');
return response.body;

This works fine when I point to any real URL, such as
, but when I point to
(or any variations of these), I get an error starting with:

E/flutter ( 4879): [ERROR:topaz/lib/tonic/logging/] Unhandled exception:
E/flutter ( 4879): SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 47060
E/flutter ( 4879): #0 IOClient.send (package:http/src/io_client.dart:30:23)

The port in the error above changes each time I reload the app. I looked in the http package code and it doesn't seem like there is a way to specify the port for the URL. How do I point to my localhost?

Answer Source

Short answer: You can pass an Uri instead of a string as parameter

      var client = createHttpClient();
      client.get(new Uri.http("locahost:8000", "/category"));
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