如何捕获node.js / express服务器错误，如EADDRINUSE？

本文介绍了如何捕获node.js / express服务器错误，如EADDRINUSE？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

这是我的代码（它是coffeescript并使用颜色，但这是不相关的）

This is my code (It's coffeescript and uses colors but that's not relevant)

# If this module is executed if !module.parent # Start server try hons_server.listen config.port console.log 'Listening to port ' + config.port catch err console.error "Couldn't start server: #{String(err)}".red

hons_server 是一个 express.js服务器。我很难理解为什么错误由于$ code> hons_server.listen（）而不会被try / catch捕获。当我运行我的服务器两次时，我得到输出：

hons_server is an express.js server. I'm having a hard time understanding why errors thrown as a result of hons_server.listen() aren't caught by the try/catch. When I run my server twice I get the output:

$ coffee src/server.coffee Listening to port 9090 node.js:201 throw e; // process.nextTick error, or 'error' event on first tick ^ Error: listen EADDRINUSE at errnoException (net.js:632:11) at Array.0 (net.js:733:26) at EventEmitter._tickCallback (node.js:192:40)

I 'd想知道为什么抛出的错误没有被捕获，以及如何/在哪里可以捕获EADDRINUSE错误。

I'd like to know why the thrown error isn't caught, and how/where I can catch the EADDRINUSE error.

推荐答案

收听服务器上的错误事件isntance

Listen for the error event on the server isntance

hons_server.on 'error', (err) -> console.log 'there was an error:', err.message