如何使用 Node.js 测试服务是否正在侦听 TCP? [英] How can I test that a service is listening on TCP with Node.js?
问题描述
总结:如何使用 Node.js 查看某个端口是否正在侦听某些内容?
详情:
我正在 Node.js 中为基于 HTTP 的应用程序编写测试.
我用 util.inherits
扩展了 Node 的 http.Server
,并在生成的类"中包装了标准的 .listen()
我自己称为 .start()
的方法中的功能.此方法执行一些设置(例如连接到 MongoDB),然后在一切顺利时调用 http.Server.listen(port, cb)
.
我的问题:我想编写一个调用 .start()
的测试,然后检查服务器是否确实在监听指定的端口.我想在不向服务器发送 HTTP 请求的情况下执行此操作.我只想测试服务器是否正在侦听.
不幸的是,我对 TCP 并不熟悉,但鉴于我在端口扫描和 netstat
和类似事物方面的经验,我的印象是 something 在 Node 的<一个 href="http://nodejs.org/api/net.html" rel="nofollow">net 包会让我这样做.这可能吗?
使用 net.connect():
var net = require('net');var client = net.connect({端口: 8124},function() {//'连接' 监听器console.log('客户端连接');客户端端();});
Node.JS 文档 net
模块>
Summary: How can I use Node.js to see whether something is listening on a given port?
Details:
I am writing tests for an HTTP-based application in Node.
I've extended Node's http.Server
with util.inherits
, and in the resulting "class" wrap the standard .listen()
functionality in a method of my own called .start()
. This method performs some setup (e.g. connects to MongoDB) and then calls http.Server.listen(port, cb)
when everything is good to go.
My problem: I'd like to write a test that calls .start()
and then checks that the server is, indeed, listening on the specified port. I would like to do this without sending an HTTP request for the server to field. I just want to test that the server is listening.
Unfortunately, I am not familiar with TCP, but given my experience with port scanning and netstat
and things of that nature, I have the impression that something in Node's net package will let me do this. Is this possible?
Use net.connect():
var net = require('net');
var client = net.connect({port: 8124},
function() { //'connect' listener
console.log('client connected');
client.end();
});
Node.JS documentation on net
module
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