Javascript 在 Node.js 中获取客户端主机名
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Getting client hostname in Node.js
提问by Ryan Zygg
is it possible to get hostnamein Node.js?
是否可以在 Node.js 中获取主机名？
This is how I get client's IP:
这是我获取客户端IP的方式：
var ip = request.header('x-forwarded-for');
So, how do I get client's hostname?
那么，我如何获得客户端的主机名？
var hostname = request.header('???');
Thanks for reply!
谢谢您的回复！
采纳答案by robertc
I think the only way you can do it is like this:
我认为你能做到的唯一方法是这样的：
<form method="post" action="/gethostname">
<label for="hostname">What is your hostname?</label>
<input type="text" name="hostname" id="hostname">
</form>
But I would suggest you don't really need it, it's not like you can do anything useful with the information. If you just want a string to identify with the user's machine then you can make something up.
但我建议你并不真的需要它，你不能用这些信息做任何有用的事情。如果你只是想要一个字符串来识别用户的机器，那么你可以编一些东西。
If what you're really after is the FQDN then I would suggest it's still not really that useful to you, but for that you need Reverse DNS lookup. If you're on a VPS or similar you can probably configure your box to do this for you, but note that it'll likely take a few seconds so it's not a good idea to do it as part of a response. Also note, you'll not be getting the user's machine's FQDN in most cases but that of their router.
如果您真正追求的是 FQDN，那么我建议它对您来说仍然没有那么有用，但为此您需要Reverse DNS lookup。如果您使用的是 VPS 或类似设备，您可能可以配置您的盒子来为您执行此操作，但请注意，这可能需要几秒钟的时间，因此将其作为响应的一部分进行操作不是一个好主意。另请注意，在大多数情况下，您不会获得用户机器的 FQDN，而是他们的路由器的 FQDN。
回答by Prestaul
You can use the 'dns' module to do a reverse dns lookup:
您可以使用 'dns' 模块进行反向 dns 查找：
require('dns').reverse('12.12.12.12', function(err, domains) {
if(err) {
console.log(err.toString());
return;
}
console.log(domains);
});
回答by peleteiro
I think this might help you. That's not exactly the client hostname but the ip address.
我想这可能对你有帮助。这不完全是客户端主机名，而是 IP 地址。
function getClientAddress(req) {
return req.headers['x-forwarded-for'] || req.connection.remoteAddress;
}
回答by Kirill
You can also achieve the same if you're using socket.io in the following manner:
如果您以下列方式使用 socket.io，您也可以实现相同的效果：
// Setup an example server
var server = require('socket.io').listen(8080);
// On established connection
server.sockets.on('connection', function (socket) {
// Get server host
var host = socket.handshake.headers.host;
// Remove port number together with colon
host = host.replace(/:.*$/,"");
// To test it, output to console
console.log(host);
});
回答by Raja
if you are using express,
如果您使用快递，
then you can do as follows,
那么你可以做如下，
var express = require("express");
var app = express.createServer();
app.listen(8080);
app.get("/", function (req, res){
console.log("REQ:: "+req.headers.host);
res.end(req.headers.host);
});
