Decompressing a compressed response from upstream, applying transformations and then compressing for downstream again

Maxim Dounin mdounin at
Mon Jan 20 13:48:52 UTC 2014


On Mon, Jan 20, 2014 at 09:40:30PM +0800, Rv Rv wrote:

> Hello
> Is there a way we can achieve the following when nginx is acting 
> as a reverse proxy
> 	1. Client sends HTTP request with Accept-Encoding as gzip
> 	2. Nginx proxy forwards the request with the request 
> 	header intact
> 	3. Origin server sends a compressed response
> 	4. At the nginx proxy, we *decompress* the response, apply 
> 	transformations on the response body and then *again* 
> 	compress it
> In other words, is there a way to use the functionality of gzip 
> and gunzip modules simultaneously for a processing a response 
> and in a particular order

As of now, it's not possible without code modifications - mostly 
because there is no way to tell gunzip filter you want it to 
always decompress a response.  It can be achieved with minor code 
changes though.

Maxim Dounin

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