无法使用 Flutter 调用本地主机，随机端口被分配给 HTTP GET 调用 [英] Unable to make calls to Localhost using Flutter, random port being assigned to HTTP GET call

问题描述

我正在尝试构建一个 Flutter 应用程序，我需要使用 dart 进行 HTTP 调用http 库.所以这是我用来拨打电话的 fu 的片段，

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;
    }
  }

现在从我的代码中调用 getData()，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 已启动并正常运行，正如您在错误日志中看到的那样，请求似乎没有通过.这里究竟是什么问题?

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，我已经尝试了 get、getUrl 的所有排列，甚至尝试替换 localhost 和 127.0.0.1 和 10.0.2.2 如如何在 Flutter 中使用 Dart http 包指向 localhost:8000? .我直接在我的手机上测试这个(一加 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

应该这样做

adb reverse tcp:5000 tcp:5000

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

或者使用 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 调用本地主机，随机端口被分配给 HTTP GET 调用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！