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| Path | csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder2-2.proxad.net!newsfeed.arcor.de!newsspool4.arcor-online.net!news.arcor.de.POSTED!not-for-mail |
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| Message-ID | <9161127.hJ6kbhveRM@PointedEars.de> (permalink) |
| From | Thomas 'PointedEars' Lahn <PointedEars@web.de> |
| Reply-To | Thomas 'PointedEars' Lahn <usenet@PointedEars.de> |
| Organization | PointedEars Software (PES) |
| Date | Sun, 07 Jul 2013 22:18:30 +0200 |
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| Subject | Re: Regexp confusion |
| Newsgroups | comp.lang.javascript |
| References | <sh5vv3omcuc2$.1ls4uvq7bzu5d$.dlg@40tude.net> <c1df98f5-f298-4131-b7a9-fd6c054b92bf@googlegroups.com> |
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| NNTP-Posting-Date | 07 Jul 2013 22:18:32 CEST |
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| X-Complaints-To | usenet-abuse@arcor.de |
| Xref | csiph.com comp.lang.javascript:20581 |
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dann90038@gmail.com wrote: > To JJ <http://www.netmeister.org/news/learn2quote.html> <http://jibbering.com/faq/#posting> <http://PointedEars.de/faq#posting> > it works for me in js if I use > \.feed(burner|sportal)\.com\/|feed.*\.gif($|\?)* Which is nonsense. Neither can the end of input/line be repeated, nor is the “?” allowed to be repeated (unescaped) in a “http(s):”-URI-Reference. > and I get matches on all 3 with the string > http://feeds.feedburner.com/any > http://feed.thesite.com/any/blah.gif > http://feedsite.com/any/blah.gif?var=blah And you also get a match for http://feedsite.com/any/blah.gif??????????var=blah which certainly is _not_ a valid “http(s):”-URI-Reference. > it also works with > \.feed(burner|sportal)\.com\/|feed.*\.gif($|\?) > if my string alone is > http://feed.thesite.com/any/blah.gif > > so, I'd think there's something after the ".gif" which isn't $ end of > input or "?" character RFC 3986, Appendix B, contains a *proper* regular expression for matching URIs that can be adapted to result in /\.feed(burner|sportal)\.com\/|feed[^?]*\.gif(\?[^#]*)?(#.*)?$/ or (non-greedy matching, probably not worth the incompatiblity here) /\.feed(burner|sportal)\.com\/|feed[^?]*\.gif(\?.*?)?(#.+)?$/ It is possible that this is still not what the OP needs as then there can only be query-part and fragment-part if a resource name was specified (“/a| b(c?)/” ≡ “/(?:a)|(?:b(c?))/”). A more viable solution might be /(\.feed(burner|sportal)\.com\/|feed[^?]*\.gif)(\?[^#]*)?(#.*)?$/ ^ ^ or /(\.feed(burner|sportal)\.com\/|feed[^?]*\.gif)(\?.*?)?(#.+)?$/ ^ ^ Note the extra parentheses that group the outer alternation. Also, where non-greedy matching is supported, potentially more efficient non-capturing parentheses are supported, for example: /(?:\.feed(?:burner|sportal)\.com\/|feed[^?]*\.gif)(\?.*?)?(#.+)?$/ -- PointedEars Twitter: @PointedEars2 Please do not Cc: me. / Bitte keine Kopien per E-Mail.
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Regexp confusion JJ <duh@nah.meh> - 2013-07-08 00:26 +0700
Re: Regexp confusion dann90038@gmail.com - 2013-07-07 12:21 -0700
Re: Regexp confusion Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-07-07 22:18 +0200
Re: Regexp confusion Denis McMahon <denismfmcmahon@gmail.com> - 2013-07-07 20:28 +0000
Re: Regexp confusion JJ <duh@nah.meh> - 2013-07-08 08:24 +0700
Re: Regexp confusion Andreas Bergmaier <andber93@web.de> - 2013-07-08 17:51 +0200
Re: Regexp confusion JJ <duh@nah.meh> - 2013-07-09 03:58 +0700
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