node.js-如何提取两个斜杠之间的子字符串？

Question

I need to extract the domain name from a string which is like " http://www.domain.com/bla324 ". The result should be "www.domain.com".

Any ideas on this?

Answer 1

You can simply use a regular expression :

var url = "http://www.domain.com/bla324",
    match = url.match(/\/\/([^\/]+)\//)[1];
if (match) {
    var host = match[1];
    ...
}

You may also use the dedicated and standard node package url :

var url = "http://www.domain.com/bla324",
    urlObject = require('url').parse(url),
    host = urlObject.host;

Answer 2

In the browser, I would use the a element :

var url = "http://www.domain.com/bla324",
    a = document.createElement('a');
a.href = url;
var host = a.host;

In node, the package url like @dystroy said.