compression-at-edge, in front of varnish reverse proxy, gzip-compresses some content, but not other ?

[Ben DJ]

Laurence,

On Tue, Apr 27, 2010 at 6:40 PM, Laurence Rowe <l at lrowe.co.uk> wrote:
> That's a 404 Not Found error message being gzipped because it is
> text/html (I think Nginx compresses that by default).
>
>> Any ideas why/where the .js is not getting gzipped?
>
> That is a 304 Not Modified response, which has no body, so nothing to
> be gzipped.
>
> Try doing a shift-reload in firefox to see what you get from the
> original request (which should return 200 OK)

Missed that :-/

Anyway, clearing all caches, and rebooting the silly server just to be
sure ;-), here's some LiveHTTPHeader output again -- I *do* see the
"200 OK" this time around.

The output's referencing  2 .css, a .js, and a .gif.  Iiuc, the .css
are both gzipped, but the .js & the .gif are not ...

----------------------------------------------------------

https://my.site.com/apostrophePlugin/css/a.css



GET /apostrophePlugin/css/a.css HTTP/1.1

Host: my.site.com

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.4) Gecko/20100417

Accept: text/css,*/*;q=0.1

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 115

Connection: keep-alive

Referer: https://my.site.com/

Cookie: symfony=NMtNSAJp8s7v-SSl6vBGK-jdpr7

Pragma: no-cache

Cache-Control: no-cache



HTTP/1.1 200 OK

Server: nginx/0.8.35

Date: Wed, 28 Apr 2010 01:46:17 GMT

Content-Type: text/css

Transfer-Encoding: chunked

Connection: keep-alive

Vary: Accept-Encoding

Last-Modified: Tue, 27 Apr 2010 18:18:16 GMT

Etag: "30367-14e26-4853bead16a00"

Cache-Control: max-age=259200

Expires: Sat, 01 May 2010 01:46:17 GMT

X-Varnish: 1825269930

Age: 0

Via: 1.1 varnish

Content-Encoding: gzip

----------------------------------------------------------

https://my.site.com/apostrophePlugin/js/jquery.timer-1.2.js



GET /apostrophePlugin/js/jquery.timer-1.2.js HTTP/1.1

Host: my.site.com

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.4) Gecko/20100417

Accept: */*

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 115

Connection: keep-alive

Referer: https://my.site.com/

Cookie: symfony=NMtNSAJp8s7v-SSl6vBGK-jdpr7

Pragma: no-cache

Cache-Control: no-cache



HTTP/1.1 200 OK

Server: nginx/0.8.35

Date: Wed, 28 Apr 2010 01:46:17 GMT

Content-Type: text/x-js

Connection: keep-alive

Last-Modified: Tue, 27 Apr 2010 18:18:18 GMT

Etag: "362df-c7e-4853beaefee80"

Cache-Control: max-age=259200

Expires: Sat, 01 May 2010 01:46:17 GMT

Content-Length: 3198

X-Varnish: 1825269932 1825269784

Age: 337

Via: 1.1 varnish

----------------------------------------------------------

https://my.site.com/css/main.css



GET /css/main.css HTTP/1.1

Host: my.site.com

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.4) Gecko/20100417

Accept: text/css,*/*;q=0.1

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 115

Connection: keep-alive

Referer: https://my.site.com/

Cookie: symfony=NMtNSAJp8s7v-SSl6vBGK-jdpr7

Pragma: no-cache

Cache-Control: no-cache



HTTP/1.1 200 OK

Server: nginx/0.8.35

Date: Wed, 28 Apr 2010 01:46:17 GMT

Content-Type: text/css

Transfer-Encoding: chunked

Connection: keep-alive

Vary: Accept-Encoding

Last-Modified: Tue, 30 Mar 2010 17:05:26 GMT

Etag: "1a8d7-f29-48307a2ca0180"

Cache-Control: max-age=259200

Expires: Sat, 01 May 2010 01:46:17 GMT

X-Varnish: 1825269931

Age: 0

Via: 1.1 varnish

Content-Encoding: gzip

----------------------------------------------------------

https://my.site.com/apostrophePlugin/images/a-special-blank.gif



GET /apostrophePlugin/images/a-special-blank.gif HTTP/1.1

Host: my.site.com

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.4) Gecko/20100417

Accept: image/png,image/*;q=0.8,*/*;q=0.5

Accept-Language: en-us,en;q=0.5

Accept-Encoding: gzip,deflate

Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7

Keep-Alive: 115

Connection: keep-alive

Referer: https://my.site.com/

Cookie: symfony=NMtNSAJp8s7v-SSl6vBGK-jdpr7

Pragma: no-cache

Cache-Control: no-cache



HTTP/1.1 200 OK

Server: nginx/0.8.35

Date: Wed, 28 Apr 2010 01:46:18 GMT

Content-Type: image/gif

Connection: keep-alive

Last-Modified: Tue, 27 Apr 2010 18:18:16 GMT

Etag: "3c20e-31-4853bead16a00"

Cache-Control: max-age=259200

Expires: Sat, 01 May 2010 01:46:18 GMT

Content-Length: 49

X-Varnish: 1825269933 1825269790

Age: 335

Via: 1.1 varnish

----------------------------------------------------------


I'm happy to provide any additional info -- I'm kinda new to digging
around in caches & headers.  Interesting, nonetheless ...

Thanks,

Ben