Forum Discussion
Rostislav_Zatol
Nimbostratus
Nimbostratusunchanking and collecting whole POST body
Hi,
I am going crazy trying to collect complete POST body sent in chunked format to the server.
HTTP::collect requires a number of bytes to collect, chunked http messages doese not have content-length header, so I dont see a possibility to collect whole body.
Chunked format has byte count for following body part. i.e.
-----
POST /xyz HTTP 1.1
header 1
header 2
Transfer-Encoding: chunked
28
herebodypartwith13characters
0
--------
the shows that 28 bytes of body follows.
I was trying to call [HTTP::payload length], it delivers 4, that means it should be 280d0a, but [HTTP::payload] itself delivers 0
I have tried to call [HTTP::collect [HTTP::payload]] doese not work also, also [HTTP::collect [HTTP::payload length]].
Maybe I am just stupid, but is there no standard parsing mechanism for HTTP 1.1 chunked POST requests?
BR
RZ
4 Replies
L4L7_53191A fairly common technique here is to specify a maximum collection value of 1MB. The description section of HTTP::collect in the iRules Wiki discusses this, as you know, there are a few nuances you'll need to be aware of!
http://devcentral.f5.com/wiki/default.aspx/iRules/HTTP__collect.html
-Matt
Rostislav_ZatolBut specifying 1MB collection value will never trigger HTTP_REQUEST_DATA in which I need to analyze the content.
Is there a way to set some timeout for collecting data? lets say max 1sec?
or some other event?
hoolioCirrostratus
Is there a way for you to configure/change the client to not send chunked requests?
The only option I can think to handle chunked request payloads in an iRule if the client can reuse the TCP connection is to collect the TCP payload and parse the chunks using TCP::payload. The logic is described in RFC2616:
http://tools.ietf.org/html/rfc2616section-3.6.1
and appendix 19.4.6:
19.4.6 Introduction of Transfer-Encoding
Anyone else have ideas on this?
Aaron
IheartF5_45022Nacreous
Hi,
Look at this iRule - I have got it working;-
http://devcentral.f5.com/wiki/iRules.HTTP%20Request%20Unchunker.ashx
Joanna
