如何从节点 js 中的“net”模块中捕获 ECONNRESET 错误？并防止整个程序被终止？

Question

如果我尝试 NodeJS 文档中的非常基本的代码

//CLIENT.js
    const net = require('net');
    const client = net.createConnection({ port: 8124 }, () => {
      // 'connect' listener.
      console.log('connected to server!');
      client.write('I am client');
    });
    client.on('data', (data) => {
      console.log(data)
      client.write('I am client');
      //client.end(); I don't want to close the connection
    });
    client.on('end', () => {
      console.log('disconnected from server');
    });

//SERVER.js
    const net = require('net');
    const server = net.createServer((c) => {
      // 'connection' listener.
      console.log('client connected');
      c.on('end', () => {
        console.log('client disconnected');
      });
      c.on('data', (data) => {
        console.log(data)
        c.write("I am server");
      })
      c.pipe(c);
    });
    server.on('error', (err) => {
      console.log("Something went worng"); //I hope this will be triggered in cases of error
    });
    server.listen(8124, () => {
      console.log('server bound');
    });

现在的问题：-

• 我启动 SERVER.js node SERVER.js
• 然后我在另一个 CMD 选项卡上启动 CLIENT.js node CLIENT.js。
• 到目前为止一切顺利......'我是服务器我是客户端............'

注意我使用的是 Windows 10

• 现在，我只需按ctrl + C 即可关闭客户端程序，然后服务器端程序终止并抛出“read ECONNRESET”

完整的错误日志

events.js:292
  throw er; // Unhandled 'error' event

Error: read ECONNRESET
at TCP.onStreamRead (internal/stream_base_commons.js:205:27)
Emitted 'error' event on Socket instance at:
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
  errno: 'ECONNRESET',
  code: 'ECONNRESET',
  syscall: 'read'
}

我理解为什么理论上会导致这个错误，所以我尝试以不同的方式解决它，因为程序没有触发server.on('error')事件，它只是终止了整个服务器程序。

所以我尝试的是

//SERVER.js

    const net = require('net');
    const server = net.createServer((c) => {
      // 'connection' listener.
      console.log('client connected');
try {
      c.on('end', () => {
        console.log('client disconnected');
      });
      c.on('data', (data) => {
        console.log(data)
        c.write("I am server");
      })
      c.pipe(c);
} catch(e){
//hoping of catching the error
console.log("Here is your error", e)
// !!! But no error is caught here and the program still gets completely terminated
}
    });
    server.on('error', (err) => {
      console.log("Something went worng"); //I hope this will be triggered in cases of error
    });
    server.listen(8124, () => {
      console.log('server bound');
    });

那么我应该如何处理“read ECONNRESET”错误呢？

Answer 1

如果您环绕 try-catch 整个代码并在 catch 中再次调用 main/starting 函数，它将再次启动，但它将进入 try-catch 的无限循环，直到您获得 ECONNRESET 的服务为又不起来了，

确保您的应用程序所依赖的服务运行时间达到 99.99999%，并让您的应用程序失败并重新启动。 （例如，使用 PM2 类型的实用程序）