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"unknown compression method"

From: Christopher R. Palmer <crpalmer_at_vivisimo.com>
Date: Thu, 30 Mar 2006 10:42:16 -0500

I'm trying to figure out what is going on with a problematic server. I
sent an HTTP request including compression (--compressed) and it responds
with perfectly normal looking headers:

< HTTP/1.1 200 OK
< Cache-Control: private
< Date: Thu, 30 Mar 2006 15:37:54 GMT
< Content-Type: text/html; Charset=ISO-8859-1
< Expires: Thu, 30 Mar 2006 15:36:48 GMT
< Server: Microsoft-IIS/6.0
< X-Powered-By: ASP.NET
< Set-Cookie: ASPSESSIONIDSSDSAADR=MAMDOLPBHKMDFILCGFLBHOGJ; path=/
< Content-Encoding: deflate
< Vary: Accept-Encoding
< Transfer-Encoding: chunked

The body begins with

412

(which is the chunk length) and then the data starts with the following hex:

                                                ed bd 07
0000660 60 1c 49 96 25 26 2f 6d ca 7b 7f 4a f5 4a d7 e0
0000700 74 a1 08 80 60 13 24 d8 90 40 10 ec c1 88 cd e6
0000720 92 ec 1d 69 47 23 29 ab 2a 81 ca 65 56 65 5d 66

which is not being recognized as gzip compression. Any idea what this ASP
server is returning? I tried some web searches and couldn't find anything
that seemed to have a magic number of ed bd.

Thanks,
Chris.
Received on 2006-03-30