Get url from a text

Question

Possible Duplicate:
regex for URL including query string

I have a text or message.

Hey! try this http://www.test.com/test.aspx?id=53

Our requirement is to get link from a text.We are using following code

List<string> list = new List<string>();
Regex urlRx = new
Regex(@"(?<url>(http:|https:[/][/]|www.)([a-z]|[A-Z]|[0-9]|[/.]|[~])*)",
RegexOptions.IgnoreCase);

MatchCollection matches = urlRx.Matches(message);
foreach (Match match in matches)
{
   list.Add(match.Value);
}
return list;

It gives url but not the complete one.Output of the code is

http://www.test.com/test.aspx

But we need complete url like

http://www.test.com/test.aspx?id=53

Please suggest how to resolve that issue.Thanks in advance.

Have a look at this [stack Overflow](http://stackoverflow.com/questions/2343177/regex-for-url-including-query-string) question, I believe it will solve your problem. — Bibhu, Feb 03 '12 at 07:24
Check out [this page](http://daringfireball.net/2010/07/improved_regex_for_matching_urls) for a complete Regex for finding and URL hidden within reguler text. If you need something simpler, I think it's commented well enough that you should be able to adapt it to your particular case. — Ken Wayne VanderLinde, Feb 03 '12 at 07:22

Amar Palsapure · Accepted Answer · 2012-02-03T07:33:54.303

17

Try this regex, returns the query string also

(http|ftp|https)://([\w+?\.\w+])+([a-zA-Z0-9\~\!\@\#\$\%\^\&\*\(\)_\-\=\+\\\/\?\.\:\;\'\,]*)?

You can test it on gskinner

edited Feb 03 '12 at 07:33

answered Feb 03 '12 at 07:26

Amar Palsapure

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2

Seems a little overly explicit. Wouldn't `(ftp|https?)://[^\s]+` work? – Sam Greenhalgh Feb 03 '12 at 09:35
+1 @zapthedingbat This will also work – Amar Palsapure Feb 03 '12 at 09:39

score 8 · Answer 2 · answered Feb 03 '12 at 07:30

public List<string> GetLinks(string message)
{
    List<string> list = new List<string>();
    Regex urlRx = new Regex(@"((https?|ftp|file)\://|www.)[A-Za-z0-9\.\-]+(/[A-Za-z0-9\?\&\=;\+!'\(\)\*\-\._~%]*)*", RegexOptions.IgnoreCase);

    MatchCollection matches = urlRx.Matches(message);
    foreach (Match match in matches)
    {
        list.Add(match.Value);
    }
    return list;
}

var list = GetLinks("Hey yo check this: http://www.google.com/?q=stackoverflow and this: http://www.mysite.com/?id=10&author=me");

It will find the following type of links:

http:// ...
https:// ...
file:// ...
www. ...

Rafał Warzycha · Answer 3 · 2018-11-15T18:45:22.800

If you are using this urls later on your code (extracting a part, querystring or etc.) please consider using

Uri class combine with HttpUtility helper.

Uri uri;
String strUrl = "http://www.test.com/test.aspx?id=53";
bool isUri = Uri.TryCreate(strUrl, UriKind.RelativeOrAbsolute, out uri);
if(isUri){
    Console.WriteLine(uri.PathAndQuery.ToString());
}else{
    Console.WriteLine("invalid");
}

It could help you with this operations.

Get url from a text

3 Answers3

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