Flutter中http请求抓包解决方案

在Flutter中进行HTTP请求时，可以使用http和http_multi_server包来设置抓包解决方案。以下是一个简单的示例，展示如何配置HTTP请求以便于抓包分析：

首先，在pubspec.yaml中添加依赖：

dependencies:
  flutter:
    sdk: flutter
  http: ^0.13.3
  http_multi_server: ^0.3.2

然后，使用http_multi_server包来配置你的请求，以便它们可以被抓包工具监听。

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:http_multi_server/http_multi_server.dart';
 
void main() {
  runApp(MyApp());
}
 
class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('HTTP Tracing Example'),
        ),
        body: Center(
          child: FutureBuilder<String>(
            future: makeRequest(),
            builder: (context, snapshot) {
              if (snapshot.hasData) {
                return Text(snapshot.data!);
              } else if (snapshot.hasError) {
                return Text("${snapshot.error}");
              }
              return CircularProgressIndicator();
            },
          ),
        ),
      ),
    );
  }
 
  Future<String> makeRequest() async {
    final baseUrl = 'https://example.com';
    final proxyUrl = 'http://localhost:8080'; // 代理服务器地址和端口
 
    final proxy = await HttpMultiServer.bind(Uri.parse(proxyUrl));
 
    proxy.http.addInterceptor((HttpRequest request) {
      print('Request: ${request.method} ${request.uri}');
      return request;
    });
 
    proxy.httpClient.findProxy = (uri) {
      return 'HTTP://$proxyUrl';
    };
 
    final client = http.Client();
    final response = await client.get(Uri.parse('$baseUrl/api/data'));
 
    proxy.close();
 
    if (response.statusCode == 200) {
      return response.body;
    } else {
      throw Exception('Failed to load data');
    }
  }
}

在上面的代码中，我们首先创建了一个HttpMultiServer实例，绑定到本地代理地址和端口。然后，我们添加了一个拦截器来打印请求信息。最后，我们配置了httpClient的findProxy方法，使得所有的HTTP请求都通过代理服务器发送。

请注意