Twitter bootstrap

[zeleznypa]

We have problem with compressing bootstrap.css
There is an error somewhere over:
$css = preg_replace_callback('/(?:^|})(?:(?:[^{:])+:)+(?:[^{]*{)/', array($this, 'replace_colon'), $css);
$css = preg_replace('/\s+([!{};:>+()]~=,])/', '$1', $css);
$css = preg_replace('/' . self::CLASSCOLON . '/', ':', $css);

[tubalmartin]

What's the issue? Please provide more details.

I've compressed successfully Bootstrap 2.0.4 using the compressor my company hosts here: http://www.margenn.com/csscompressor

Try it if you want.

[zeleznypa]

It is very strange, because same css file work well on your site, but on my computer (Windows, Apache, Php 5.3) cause issue "Error 101(net::ERR_CONNECTION_RESET): Connection reset".

I found that there is a problem with calling this "$css = preg_replace_callback('/(?:^|})(?:(?:[^{:])+:)+(?:[^{]*{)/', array($this, 'replace_colon'), $css);" on bootstrap.css

I don't know why. There is no error message, no log nothing just this.

[tubalmartin]

Ummm, if you Google "Error 101(net::ERR_CONNECTION_RESET): Connection reset" you'll see there are many people who had that issue.

Are you using a database connection (MySQL) when the compressor runs? check this out: http://serverfault.com/questions/74313/what-could-cause-an-101-error-in-wamp-under-windows-7

As a side note: Windows + Apache = issues!

[zeleznypa]

After more than hour of browsing and searching I found this: http://stackoverflow.com/questions/7620910/regexp-in-preg-match-function-returning-browser-error

Problem was somewhere else. Sorry for my false

[zeleznypa]

I have to investigate this problem more.

On my developper station (Windows XP, Php 5.3.14, Apache/2.2.22) I still have an issue "Error 101(net::ERR_CONNECTION_RESET): Connection reset". After some investigating I found that core of the problem is in pcre.recursion_limit parameter in php.ini.

After that I found, that CssMin set this value itself. When I call CssMin with FALSE value of constructor parametter $raise_php_limits, Problem with error 101 disappear.!!!!

Unfortunetly, there is another issue. CssMinificator completly delete content of first chunk of twitter bootstrap.css
Code disappear right in the part I paste in first comment.

[mrclay]

So not increasing PCRE limits can cause crashes, and raising PCRE limits via ini_set can cause crashes! I love PCRE.

[tubalmartin]

Try lowering the chunk length to 10.000 chars or even less until it doesn't break. Default is 25.000 chars

$css_chunk_length = 25000; // aprox size, not exact

[mikeytown2]

Same block of code has an issue with this file
http://drupalcode.org/project/drupal.git/blob/29d1b4e91125018dbe99901dfa6a6e21f87e6cc1:/themes/seven/reset.css
http://drupalcode.org/project/drupal.git/blob_plain/29d1b4e91125018dbe99901dfa6a6e21f87e6cc1:/themes/seven/reset.css

[tubalmartin]

Hi mikeytown2,

I can't find any issues with your code. I've compressed it successfully several times using the gui: http://www.margenn.com/csscompressor

[mikeytown2]

Tested on a windows box. I've played around with the PCRE limits and chunk length and it still dies with no error in the php error log; xdebug output is incomplete. I guess I'll make that code conditional; only run if not windows. http://stackoverflow.com/questions/5879043/php-script-detect-whether-running-under-linux-or-windows

[tubalmartin]

I don't have a Windows environment to test this but google a bit and you'll find many topics discussing issues with Windows + Apache/mod_php and PCRE limits such as this one: http://stackoverflow.com/questions/3457039/apache-php-on-windows-crashes-with-regular-expression which suggests it maybe a bug with the PHP version/compilation used.

My suggestion: Don't use Windows if possible, upgrade Apache and PHP to the latest stable release.

I'm closing this issue.

[alexweber]

Apologies for re-opening this but I'v having the exact same issue on OSX + MAMP and extending the check on line 290 to ignore "DAR" as well (OSX == Darwin apparently) fixes it for me...

[mrclay]

FYI I'm seeing people have more of these crashes with Bootstrap 3's CSS file. I have a section on this wiki page, is there anything you would add?
https://code.google.com/p/minify/wiki/CommonProblems

[tubalmartin]

I'll give the bootstrap 3 a try with the compressor and report back ;)

[tubalmartin]

I've just released version 2.4.8-2. I've reduced the chunk length by 5x so it's now 5.000 chars. Most PCRE issues should be gone. Give it a go!!