Node.js http.createServer如何获取错误 [英] Node.js http.createServer how to get error

问题描述

我是node.js的新手，我正在尝试基本的东西。

I am new to node.js and am trying to experiment with basic stuff.

我的代码是这个

var http = require("http");
http.createServer(function(request, response) {
    response.writeHead(200, {"Content-Type": "text/plain"});
    response.write("Hello World");
    response.end();
}).listen(8888);

这是一个问题 - 如何在调用createServer时看到抛出的异常（或抛出的事件）？我尝试过try / catch但它似乎不起作用。在模块的API中，我找不到任何对它的引用。我问，因为我不小心在一个端口上启动了一个服务器（8888），我得到的错误（在命令行中）是错误：EDDRINUSE，这很有用但是能够理解如何捕获错误会很好在节点中。

Here's the question - how can I see the exceptions thrown (or events thrown) when calling createServer ? I tried try/catch but it doesn't seem to work . In module's API I couldn't find any reference to it . I am asking because I accidentally started a server on a taken port(8888) and the error I got (in command-line) was Error : EDDRINUSE , this is useful enough but it would be nice to be able to understand how errors are caught in node .

推荐答案

您可以通过处理正在创建的服务器上的错误事件来执行此操作。首先，得到 .createServer（）的结果。

You can do this by handling the error event on the server you are creating. First, get the result of .createServer().

var server = http.createServer(function(request, response) {

然后，您可以轻松处理错误：

Then, you can easily handle errors:

server.on('error', function (e) {
  // Handle your error here
  console.log(e);
});

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