Apache/2.2.20 (Ubuntu 11.10) gzip compression won't work on php pages, content is chunked
- by FamousInteractive
I'm running into a problem with a new production server whereto I'm transferring projects. The HTML output of the PHP applications isn't compressed by the Apache mod_deflate module. Other resources, as stylesheet and javascript files, even html pages, which are served with the same Content-type (text/html) as the PHP output, are compressed!
The projects use the following rules (from HTML5 boilerplate) in the .htaccess:
<IfModule mod_deflate.c>
# Force deflate for mangled headers developer.yahoo.com/blogs/ydn/posts/2010/12/pushing-beyond-gzipping/
<IfModule mod_setenvif.c>
<IfModule mod_headers.c>
SetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\s*,?\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding
RequestHeader append Accept-Encoding "gzip,deflate" env=HAVE_Accept-Encoding
</IfModule>
</IfModule>
# HTML, TXT, CSS, JavaScript, JSON, XML, HTC:
<IfModule filter_module>
FilterDeclare COMPRESS
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/html
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/css
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/plain
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $text/x-component
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/javascript
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/json
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/xhtml+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/rss+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/atom+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/vnd.ms-fontobject
FilterProvider COMPRESS DEFLATE resp=Content-Type $image/svg+xml
FilterProvider COMPRESS DEFLATE resp=Content-Type $image/x-icon
FilterProvider COMPRESS DEFLATE resp=Content-Type $application/x-font-ttf
FilterProvider COMPRESS DEFLATE resp=Content-Type $font/opentype
FilterChain COMPRESS
FilterProtocol COMPRESS DEFLATE change=yes;byteranges=no
</IfModule>
</IfModule>
We have a testing machine that runs the same Apache, OS and PHP version. On that machine the compression works just fine on the PHP output. I've checked and compared Apache and PHP config files, all the same as far as I can tell.
I've tried several manners of outputting the content of the PHP, using output buffering or just plain echoing the content. Same thing, no compression.
Example response headers of a PHP output:
HTTP/1.1 200 OK
Date: Wed, 25 Apr 2012 23:30:59 GMT
Server: Apache
Accept-Ranges: bytes
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: public
Pragma: no-cache
Vary: User-Agent
Keep-Alive: timeout=5, max=98
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: text/html; charset=utf-8
Example of response headers on a css file:
HTTP/1.1 200 OK
Date: Wed, 25 Apr 2012 23:30:59 GMT
Server: Apache
Last-Modified: Mon, 04 Jul 2011 19:12:36 GMT
Vary: Accept-Encoding,User-Agent
Content-Encoding: gzip
Cache-Control: public
Expires: Fri, 25 May 2012 23:30:59 GMT
Content-Length: 714
Keep-Alive: timeout=5, max=100
Connection: Keep-Alive
Content-Type: text/css; charset=utf-8
Does anyone has a clue or experienced the same "problem"?
thanks!
