Multiline- und Space-Regex-Problem in C# nur

Question

Was ist falsch an diesem Code? Mein Ziel ist es, URLs in Text zu finden und sie in Hyperlink-Tags einzufügen. Ich benutze alten diegoperini regex (Kredite https://mathiasbynens.be/demo/url-regex). Alles läuft gut, wenn meine Eingabe am Ende eine Zeile und ohne Leerzeichen ist.

https://regex101.com/ Seite zeigt, dass diese Regex gültig ist (global und Multi-Checked), aber C# findet nichts.

class Program 
    { 
     static void Main(string[] args) 
     { 
      String sourcestring = @"Tralala 

bla bla bla 

https://iqesonline.lt/index.cfm 
bla bla bla bla 
https://iqesonline.lt/index.cfm?id=99061c04-441e-a138-8254-6c441f7f59b5 

ulala. 

trampampam"; 
      // WORKS sourcestring = "https://iqesonline.lt/index.cfm?id=98061c04-441e-a138-8254-6c441f7f59b5"; 
      // DOES NOT WORK sourcestring = "https://iqesonline.lt/index.cfm?id=98061c04-441e-a138-8254-6c441f7f59b5 "; 
      ParseLinksToHtml(sourcestring); 


     } 
     public static string ParseLinksToHtml(string tekstas) 
     { 

      string result = tekstas; 
      if (!string.IsNullOrEmpty(result)) 
      { 
       // NOT WORKING Regex rx = new Regex(@"^(?:(?:https?|ftp)://)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:/[^\s]*)?$"); 
       //NOT WORKING TOO 
       Regex rx = new Regex(@"^(?:(?:https?|ftp)://)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:/[^\s]*)?$", RegexOptions.Multiline | RegexOptions.IgnoreCase); 
       result = rx.Replace(result, delegate (Match match) 
       { 
        string url = match.ToString(); 
        if (url.ToLower().StartsWith("www.")) 
        { 
         url = "http://" + url; 
        } 
        return string.Format("<a href=\"{0}\" target=\"_blank\">{1}</a>", url, match.ToString()); 
       }); 
      } 
      return result; 
     } 


    } 

Answer 1

Getestet Arbeit mit der folgenden vereinfachten regex string:

@"(?:\w+):\/\/(?:[\w@][\w.:@]+)\/?[\w\.?=%&=\-@/$,]*"

Produziert:

Tralala 

bla bla bla 

<a href="https://iqesonline.lt/index.cfm" target="_blank">https://iqesonline.lt/index.cfm</a> 
bla bla bla bla 
<a href="https://iqesonline.lt/index.cfm?id=99061c04-441e-a138-8254-6c441f7f59b5" target="_blank">https://iqesonline.lt/index.cfm?id=99061c04-441e-a138-8254-6c441f7f59b5</a> 

ulala. 

trampampam 

Answer 2

Richtige Antwort lautet: das Entfernen von "^" und "$" machte es Arbeit . Antwort gehört zu Magnetron. Vielen Dank.

Regex rx = new Regex(@"^(?:(?:https?|ftp)://)(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!192\.168(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:/[^\s]*)?$", RegexOptions.Multiline | RegexOptions.IgnoreCase);