REGEX class handles multiline?

AaronD · 2010-05-03 18:15

This is for anyone familiar with the scraper implementation, specifically the capability of PCRE (Not looking at anyone in particular :rolleyes Smile

Stepping through the code, I have the following expression text:

Code:

<thumb([^>]*)>.*?url="([^"]*)".*?size="original".*?</thumb>

And the following input string, copied literally from the Text visualizer in Visual Studio:

Code:

<thumb>

          <image url="http://i2.themoviedb.org/posters/42f/4bc95005017a3c57fe02342f/antichrist-original.jpg" size="original" width="1418" height="1944"/>

          <image url="http://i3.themoviedb.org/posters/42f/4bc95005017a3c57fe02342f/antichrist-mid.jpg" size="mid" width="500" height="685"/>

          <image url="http://i1.themoviedb.org/posters/42f/4bc95005017a3c57fe02342f/antichrist-cover.jpg" size="cover" width="185" height="253"/>

          <image url="http://i1.themoviedb.org/posters/42f/4bc95005017a3c57fe02342f/antichrist-thumb.jpg" size="thumb" width="92" height="126"/>

        </thumb>

I've tried several 3rd party regex testers or evaluators, and they all fail to find a match, but only because of the carriage returns. If I remove those so the text is all on a single line, the regex matches. However what puzzles me is if I use the original expression text from the scraper file, it also fails on other regex testers.

So my question: Does PCRE work across multiple lines? And if so, why doesn't it work with my regex? JUst an oddity of PCRE?

**jmarshall** · 2010-05-03 23:32

PCRE should work across multiple lines, yes - there's a flag we specify. Not sure why it's not matching your regexp?

AaronD · 2010-05-04 05:56

Actually I realised afterwards that mine was a stupid post. Its scraping websites with multiple lines isn't it, of course it must work with carriage return.

Oh well, I guess I will just put it down to an oddity of PCRE and move on.

Thanks

jmarshall Team-XBMC Developer Posts: 24,523 Joined: Oct 2003 Reputation: 138	2010-05-03 23:32 Post: #2 PCRE should work across multiple lines, yes - there's a flag we specify. Not sure why it's not matching your regexp? Always read the XBMC online-manual, FAQ and search the forum before posting. Do not e-mail XBMC-Team members directly asking for support. Read/follow the forum rules. For troubleshooting and bug reporting please make sure you read this first.
	find quote

AaronD Senior Member Posts: 252 Joined: Jan 2007 Reputation: 0 Location: Dubai, United Arab Emirates	2010-05-04 05:56 Post: #3 Actually I realised afterwards that mine was a stupid post. Its scraping websites with multiple lines isn't it, of course it must work with carriage return. Oh well, I guess I will just put it down to an oddity of PCRE and move on. Thanks
	find quote