Javascript 没有 http、https、ftp 的 url 的正则表达式
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4275525/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Regex for urls without http, https, ftp
提问by Guest
I'm looking for a regex that accept urls like these:
我正在寻找一个接受这样的网址的正则表达式：
http://www.example.com
www.example.com
This is what I have so far, but it regex doesn't match URLs without http://or https://, or ftp://:
到目前为止，这是我所拥有的，但它的正则表达式不匹配没有http://or 的URL https://，或者ftp://：
regexp = /(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?/;
How can I make the protocol optional?
我怎样才能使协议成为可选的？
采纳答案by Bart Kiers
Make the (ftp|http|https):\/\/part optional:
使(ftp|http|https):\/\/部件可选：
((ftp|http|https):\/\/)?
回答by Rajiv Aggarwal
Try this this will validate url with (http,ftp,https) or without(http,ftp,https)..
试试这个，这将使用 (http,ftp,https) 或不使用 (http,ftp,https) 验证 url。
/^(?:(ftp|http|https):\/\/)?(?:[\w-]+\.)+[a-z]{3,6}$/;
回答by udaykrishna
Try this this will validate url with or without(http,ftp,https) in upper and lower cases and also allows you to for numerics
试试这个，这将在大写和小写中使用或不使用（http，ftp，https）验证 url，并且还允许您使用数字
/^(?:(ftp|http|https)?:\/\/)?(?:[\w-]+\.)+([a-z]|[A-Z]|[0-9]){2,6}$/gi;
回答by udaykrishna
Kindly see https://codegolf.stackexchange.com/a/480/6593
请参阅https://codegolf.stackexchange.com/a/480/6593
Quoting from the above link:
引用上面的链接：
value = 'www.google.com';
if(/(^|\s)((https?:\/\/)?[\w-]+(\.[\w-]+)+\.?(:\d+)?(\/\S*)?)/gi.test(value)) {
return true;
} else {
return false;
}
