无法使用Flutter呼叫本地主机，随机端口已分配给HTTP GET呼叫 [英] Unable to make calls to Localhost using Flutter, random port being assigned to HTTP GET call

问题描述

我正在尝试构建Flutter应用程序，需要使用 dart进行HTTP调用http库。因此，这是我用来打电话的功能的一个片段，

I'm attempting to build a Flutter app where I'm required to make an HTTP call using the dart http library. So here's a snipped of the fu I use to make the call,

import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'package:http/http.dart' as http;

Future<List> getData() async {
    List data = new List();
    var httpClient = new HttpClient();
    var request = await httpClient.get("localhost", 5000, '/search?query=hello');
    var response = await request.close();
    if (response.statusCode == HttpStatus.OK) {
      var jsonString = await response.transform(utf8.decoder).join();
      data = json.decode(jsonString);
      print(data);
      return data;
    } else {
      return data;
    }
  }

现在调用 getData（ ）从我的代码中，这是我得到的错误

now on calling getData() from my code, here's the error I get

E/flutter (30949): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter (30949): SocketException: OS Error: Connection refused, errno = 111, address = localhost, port = 46999
E/flutter (30949): #0      _HomePageState.getData (file:///home/bholagabbar/AndroidStudioProjects/fnd_modile_client/lib/main.dart:75:19)
E/flutter (30949): <asynchronous suspension>
E/flutter (30949): #1      _HomePageState.build.<anonymous closure> (file:///home/bholagabbar/AndroidStudioProjects/fnd_modile_client/lib/main.dart:56:15)
E/flutter (30949): #2      _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:478:14)
E/flutter (30949): #3      _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:530:30)
E/flutter (30949): #4      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:102:24)
E/flutter (30949): #5      TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:161:9)
E/flutter (30949): #6      TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:94:7)
E/flutter (30949): #7      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:315:9)
E/flutter (30949): #8      PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:73:12)
E/flutter (30949): #9      PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:11)
E/flutter (30949): #10     _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:143:19)
E/flutter (30949): #11     _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:121:22)
E/flutter (30949): #12     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:101:7)
E/flutter (30949): #13     _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:64:7)
E/flutter (30949): #14     _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:48:7)
E/flutter (30949): #15     _invoke1 (dart:ui/hooks.dart:134:13)
E/flutter (30949): #16     _dispatchPointerDataPacket (dart:ui/hooks.dart:91:5)

我的API已正确启动并运行，正如您在错误日志中所看到的那样，请求似乎没有通过。这到底是什么问题？

My API is up and running correctly, As you can see in the error logs, the request just doesn't seem to be going through. What exactly is the issue here?

为了记录，我尝试了 get ， getUrl ，甚至尝试将 localhost 和 127.0.0.1 替换为 10.0.2.2 ，如如何使用Flutter中的Dart http包指向localhost：8000？。我正在手机上直接测试（One Plus 3）

For the record, I have tried every permutation of get, getUrl and even tried replacing localhost and 127.0.0.1 with 10.0.2.2 as mentioned in How to point to localhost:8000 with the Dart http package in Flutter? . I am testing this on my phone directly (One Plus 3)

推荐答案

这应该做到

adb reverse tcp:5000 tcp:5000

https://developer.android.com/studio/command-line/ adb.html

或使用 adb reverse --list 查看设置了哪些重定向。

Or use adb reverse --list to see what redirects are set up.

这篇关于无法使用Flutter呼叫本地主机，随机端口已分配给HTTP GET呼叫的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！