Can we uncompress request data?

Hi Taner,

 

 

I don't believe any browser supports sending compressed data in a request. I'm not sure there is a way in HTTP 1.1 for a client to check if a server would support compressed data. Are you testing with a custom client that you control? If so, can you provide a sample request including the headers and payload?

 

 

On a related note, there isn't a way for LTM to decompress response data that is compressed. The best option I've seen for this is to remove the Accept-Encoding request header before sending the request to the pool member. This prevents the server from sending compressed data.

 

 

Aaron

 

Our client is custom client. Two way traffic data (client->f5->server & server->f5->client ) are compressed.

 

 

If http request header "request-zipped: true" than server uncomress

 

: Content-Encoding: gzip

 

: request-zipped: true

 

 

If http response header "request-zipped: true" than client uncomress

 

: response-zipped: true

 

: Content-Encoding: gzip

 

 

If we can uncompress request data at LTM servers cpu usage will be decrease.

 

 

Sample request is below which is copy from ethereal.

 

 

POST /PLM/PLMServlet HTTP/1.1

 

 

Cookie: AlteonP=1629049098.20480.0000; path=/

 

 

user-agent: FRE

 

 

Content-Encoding: gzip

 

 

request-zipped: true

 

 

response-zipped: true

 

 

encoding: iso-8859-9

 

 

Cache-Control: no-cache

 

 

Pragma: no-cache

 

 

Host: cbtst

 

 

Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2

 

 

Connection: keep-alive

 

 

Content-type: application/x-www-form-urlencoded

 

 

Content-Length: 389

 

 

 

 

...........S.R.@......f.%...q$,...xIM.ZT..Hb.....%.ji.q.{..~..{.,

 

Z&......d'.g.Y.p.q_...0....=.S.Rm.`.k,..

 

.>... .~.S. ........:..U{.5I.%B.1..i...q..........Vt..H..$.H....KZe.......q.F......i..Rz..].d........g...

 

.C/.i..U...

 

..7@'.N..9.

 

2.,..S?:"..'.7.B.t.5?.;Bl..D5.,%._..E.]w....fz.Ru...n ..;"..Y.g...r..%...........!...6...R4........x.

 

[u|....?lU.b.b..[^...?*3...HTTP/1.1 200 OK

 

 

Date: Tue, 02 Sep 2008 07:58:58 GMT

 

 

Server: IBM_HTTP_Server

 

 

encoding: iso-8859-9

 

 

response-zipped: true

 

 

Keep-Alive: timeout=10, max=100

 

 

Connection: Keep-Alive

 

 

Transfer-Encoding: chunked

 

 

Content-Type: text/plain

 

 

Content-Encoding: gzip

 

 

Content-Language: tr-TR

 

 

 

 

7e

 

 

............A

 

.0.EW?...3AcfiC...

 

....E.1U\..fx.y.........u....K.<.X...b.S.OTE.. .....Q.rr...X...F\......u....!W.H...Y.........

 

 

0

 

 

 

Regards

 

Taner

Interesting. I don't think there is a way with LTM to decompress request or response content (though there is functionality to do this with ASM).

 

 

You might try opening a case with F5 Support and ask about this. If they don't have any ideas for how to do this, you could ask them to create a request for enhancement. If you do this, could you reply back here with the Change Request number? Another person was interested in similar functionality (Click here).

 

 

Aaron