颤振- SocketException:连接失败(OS错误:网络不可达，errno = 101)

Question

连接到虚空节点时获取错误

E/颤振(23790)：错误:flutter/lib/ui/ui_dart_state.cc(148个)未处理异常: SocketException:连接失败(OS错误:网络不可达，errno =101个)

import 'package:flutter/material.dart';
import 'package:http/http.dart';
import 'package:web3dart/web3dart.dart';
import 'dart:async';

const String rpcUrls = 'https://node1.bitcoiin.com';
class HomeScreen extends StatefulWidget {
  @override
  State<StatefulWidget> createState() {
    return _HomeScreenState();
  }
}
class _HomeScreenState extends State<HomeScreen> {
  @override
  void initState() {
    main();
    super.initState();
  }
  main(){
  var ethClient = new Web3Client(apiUrls, new Client());
  print(ethClient.getBlockNumber());
}

Answer 1

我仍然不知道为什么这个解决方案有效，但我也遇到了同样的问题，我试图用我的服务器的IP地址(例如192.168.1.33)替换192.168.1.33。起作用了！

为您的应用程序尝试以下代码：

main(){
  var httpClient = new Client();
  // You tried the code below and it didn't work
  // var ethClient = new Web3Client('http://localhost:8545', httpClient);

  // Try this code instead. (Replace "192.168.1.33" with the IP of your server)
  var ethClient = new Web3Client('http://192.168.1.33:8545', httpClient);

  print(ethClient.getBlockNumber());
}