javascript - Node js http服务器错误处理

Question

以下是我的代码:

const http = require('http');
var server1 = http.createServer(function(req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.write('request successfully proxied!' + '\n' + JSON.stringify(req.headers, true, 2) + '\n' + req.url);
    res.end();
    throw new Error("Error!!!");
});
server1.on("error", err=>console.log(err));
server1.listen(5060);

为什么回调抛出的异常没有被server1.on("error", ...) 处理而进程停止了？ 如果这样的异常不能通过监听“error”事件来处理， 我该如何处理这样的异常，让http服务器从那时起仍然可以正常运行？

Answer 1

使用emit代替throw:

const http = require('http');
var server1 = http.createServer(function(req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.write('request successfully proxied!' + '\n' + JSON.stringify(req.headers, true, 2) + '\n' + req.url);
    res.end();
    // throw new Error("Error!!!");
    this.emit('error', new Error("Error!!!"));
});
server1.on("error", err=>console.log(err));
server1.listen(5060);