Question

我遇到正则表达式问题，无法从网址获取主域名。那就是如果我有下面给出的网址..

http://domain.com/return/java.php?hello.asp
http://www.domain.com/return/java.php?hello.asp
http://blog.domain.net/return/java.php?hello.asp
http://us.blog.domain.co.us/return/java.php?hello.asp
http://domain.co.uk
http://domain.net
http://www.blog.domain.co.ca/return/java.php?hello.asp
http://us.domain.com/return/

从这一切我只应该域作为正则表达式的输出.. 那怎么办呢？我用过;

var url = urls.match(/[^.]*.(com|net|org|info|coop|int|co\.uk|org\.uk|ac\.uk|uk)/g);

但它不适用于

  http://domain.net

所以有人可以帮我解决这个问题。

Answer 1

您可以使用URL而不是正则表达式

var url  = new URL("http://domain.com/return/java.php?hello.asp");
console.log(url.hostname);
=> domain.com

或

如果你也想要协议

var url = new URL("http://domain.com/return/java.php?hello.asp"); console.log(url.protocol+"//"+url.hostname); = > http://domain.com

Answer 2

这会有帮助吗？

(http|https|ftp):\/\/([a-zA-Z0-9.])+/g

匹配

http://domain.com
http://www.domain.com
http://blog.domain.net
http://us.blog.domain.co.us
http://domain.co.uk
http://domain.net
http://www.blog.domain.co.ca
http://us.domain.com

Answer 3

这是一个改变正则表达式的解决方案：

url.match(/https?:\/\/[^/]+((?=\/)|$)/g);
//tested with Chrome 38+ on Win7

基本检查斜杠/或字符串结尾$

使用内联Stackoverflow代码替换jsFiddle链接代码：

var urls = ['http://domain.com/return/java.php?hello.asp',
  'http://www.domain.com/return/java.php?hello.asp',
  'http://blog.domain.net/return/java.php?hello.asp',
  'http://us.blog.domain.co.us/return/java.php?hello.asp',
  'http://domain.co.uk',
  'http://domain.net',
  'http://www.blog.domain.co.ca/return/java.php?hello.asp',
  'http://us.domain.com/return/'
];

var htmlConsole = document.getElementById("result");
var htmlTab = "&nbsp;&nbsp;&nbsp;&nbsp;";
var htmlNewLine = "<br />";

htmlConsole.innerHTML = "";
for (var id in urls) {

  htmlConsole.innerHTML += "URL: " + urls[id] + htmlNewLine;

  var matchResults = urls[id].match(/https?:\/\/[^/]+((?=\/)|$)/g);

  for (var innerIdx in matchResults) {
    htmlConsole.innerHTML += htmlTab + "MatchNumber: " + innerIdx + " MatchValue: " + matchResults[innerIdx] + htmlNewLine;
  }

  htmlConsole.innerHTML += htmlNewLine;

}

<div id="result">
</div>

Answer 4

var url = urls.match(/[^./]*.(com|net|org|info|coop|int|co\.uk|co\.us|co\.ca|org\.uk|ac\.uk|uk)/g);

刚刚添加了/并更新了顶级域名列表以符合您的示例虽然我不建议将顶级域列表保留在regexp中。它太多了。 http://en.wikipedia.org/wiki/List_of_Internet_top-level_domains

正则表达式在javascript中获取域名？

4 个答案: