December 2009
Intermediate to advanced
560 pages
15h 5m
German
Content preview from Reguläre Ausdrücke KochbuchBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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7.13 Die Query aus einer URL extrahieren
Problem
Sie wollen die Query aus einem String auslesen, der eine URL enthält. So wollen Sie zum Beispiel den Wert param=value erhalten, wenn Ihr Ausgangstext http://www.regexcookbook.com?param=value oder /index.html?param=value lautet.
Lösung
^[^?#]+\?([^#]+)
Regex-Optionen: Groß-/Kleinschreibung ignorieren
Regex-Varianten: .NET, Java, JavaScript, PCRE, Perl, Python, Ruby
Diskussion
Das Extrahieren der Query aus einer URL ist trivial, wenn Sie wissen, dass es sich bei Ihrem Ausgangstext um eine gültige URL handelt. Die Query wird vom vorderen Teil der URL durch ein Fragezeichen abgetrennt. Das ist das erste Fragezeichen, das in URLs erlaubt ist. Daher können wir mit ‹^[^?#]+\?› einfach alles bis zu diesem ersten ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.