Question around Gzip static and CDN

[Rakesh Rajan]

Hi Maxim,

I am sure the CDN supports gzip. So in case if I configure nginx with 
gzip ( and not gzip_static ) and there is only test.js , then the CDN 
works fine ( the CDN response headers contains gzip ). This issue seems 
quite specific to CDN and having only test.js.gz  on my server ( with 
nginx configure as gzip_static )

Thanks,
Rakesh

Maxim Dounin wrote:
> Hello!
>
> On Fri, Aug 22, 2008 at 07:03:55PM +0530, Rakesh Rajan wrote:
>
>> I have recently moved serving static files from Apache to Nginx ( 
>> 0.7.11  ). As a part of build, I gzip JS and CSS files and have 
>> complied nginx  using --with-http_gzip_static_module .
>>
>> When I access the page using,  
>> http://static0.<mydomain>.com/js/test.v1.js , nginx serves the page  
>> fine. The response headers looks like
>>
>> /Server nginx/0.7.11
>> Date Fri, 22 Aug 2008 13:26:12 GMT
>> Content-Type application/x-javascript
>> Content-Length 1034
>> Last-Modified Fri, 22 Aug 2008 12:12:49 GMT
>> Connection keep-alive
>> Content-Encoding gzip
>> Expires Sat, 22 Aug 2009 13:26:12 GMT
>> Cache-Control max-age=31536000
>>
>> /I am using Softlayer CDN ( which is backed by the above nginx ). 
>> Now,  the same request using the CDN does not work ( returns a 404 ).
>>
>> Note: In case I have only test.js ( instead of only test.js.gz ) 
>> then  both nginx and CDN works fine. And in case I have only 
>> test.js.gz then  only nginx works
>
> For gzip_static module you must have both compressed and uncompressed 
> versions of file.  Compressed one is used when client supports gzip, 
> and uncompressed one if it doesn't.
>
> Since your CDN doesn't work without uncompressed version - it probably 
> doesn't support gzip (at least doesn't advertize it to nginx) and 
> gzip_static module is useless here.
>
> Maxim Dounin
>