id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,difficulty,ghcversion,platform
562,cabal-install update fails going through a HTTP proxy (but not consistently),acid2,,"I have installed Cabal, cabal-install and HTTP all from source on my Arch Linux machine, which has GHC 6.10.3 installed. When running {{{cabal update}}} this will occasionally work, but most often fails with the error:

{{{cabal: user error (Codec.Compression.Zlib: premature end of compressed stream)}}}

In this case, inspecting ~/.cabal/packages/hackage.haskell.org/00-index.tar.gz shows a file size that varies around 1-15K, rather than the expected ~900K.

Attached are logs of `cabal-update` failing, and working:

{{{
Downloading the latest package list from hackage.haskell.org
Sending:
GET http://hackage.haskell.org/packages/archive/00-index.tar.gz HTTP/1.1
User-Agent: cabal-install/0.6.2
Host: hackage.haskell.org
proxy uri host: wwwcache.lancs.ac.uk, port: :8080
Creating new connection to wwwcache.lancs.ac.uk:8080
Received:
HTTP/1.0 200 OK
Date: Tue, 09 Jun 2009 13:50:46 GMT
Server: Apache/2.2.3 (Debian)
Last-Modified: Tue, 09 Jun 2009 09:53:44 GMT
ETag: ""3890c4-f8d7c-55909a00""
Accept-Ranges: bytes
Content-Length: 1019260
Content-Type: application/x-tar
Content-Encoding: x-gzip
Age: 854
X-Cache: HIT from wwwcache.lancs.ac.uk
X-Cache-Lookup: HIT from wwwcache.lancs.ac.uk:8080
X-Cache: MISS from wwwcache.lancs.ac.uk
X-Cache-Lookup: MISS from wwwcache.lancs.ac.uk:8080
Via: 1.0 wwwcache3.lancs.ac.uk:8080 (squid/2.6.STABLE22), 1.0
wwwcache1.lancs.ac.uk:8080 (squid/2.7.STABLE4)
Connection: close
Downloaded to /home/ollie/.cabal/packages/hackage.haskell.org/00-index.tar.gz
}}}

{{{
Downloading the latest package list from hackage.haskell.org
Sending:
GET http://hackage.haskell.org/packages/archive/00-index.tar.gz HTTP/1.1
User-Agent: cabal-install/0.6.2
Host: hackage.haskell.org
proxy uri host: wwwcache.lancs.ac.uk, port: :8080
Creating new connection to wwwcache.lancs.ac.uk:8080
Received:
HTTP/1.0 200 OK
Date: Tue, 09 Jun 2009 13:50:46 GMT
Server: Apache/2.2.3 (Debian)
Last-Modified: Tue, 09 Jun 2009 09:53:44 GMT
ETag: ""3890c4-f8d7c-55909a00""
Accept-Ranges: bytes
Content-Length: 1019260
Content-Type: application/x-tar
Content-Encoding: x-gzip
Age: 875
X-Cache: HIT from wwwcache.lancs.ac.uk
X-Cache-Lookup: HIT from wwwcache.lancs.ac.uk:8080
Via: 1.0 wwwcache3.lancs.ac.uk:8080 (squid/2.6.STABLE22)
Proxy-Connection: close
Downloaded to /home/ollie/.cabal/packages/hackage.haskell.org/00-index.tar.gz
Reading available packages...
}}}

I was also asked to try running wget in verbose mode, this is the output:

{{{
--2009-06-09 16:17:00--  http://hackage.haskell.org/packages/archive/00-index.tar.gz
Resolving wwwcache.lancs.ac.uk... 194.80.32.11, 194.80.32.8, 194.80.32.9, ...
Connecting to wwwcache.lancs.ac.uk|194.80.32.11|:8080... connected.
Proxy request sent, awaiting response... 
  HTTP/1.0 200 OK
  Date: Tue, 09 Jun 2009 13:50:46 GMT
  Server: Apache/2.2.3 (Debian)
  Last-Modified: Tue, 09 Jun 2009 09:53:44 GMT
  ETag: ""3890c4-f8d7c-55909a00""
  Accept-Ranges: bytes
  Content-Length: 1019260
  Content-Type: application/x-tar
  Content-Encoding: x-gzip
  Age: 1558
  X-Cache: HIT from wwwcache.lancs.ac.uk
  X-Cache-Lookup: HIT from wwwcache.lancs.ac.uk:8080
  Via: 1.0 wwwcache3.lancs.ac.uk:8080 (squid/2.6.STABLE22)
  Proxy-Connection: close
Length: 1019260 (995K) [application/x-tar]
Saving to: `00-index.tar.gz.2'

100%[===================================================================================================>] 1,019,260   --.-K/s   in 0.09s   

2009-06-09 16:17:00 (11.1 MB/s) - `00-index.tar.gz.2' saved [1019260/1019260]
}}}",defect,closed,normal,cabal-install-0.14,cabal-install tool,1.6.0.1,normal,invalid,,valery.vv@…,unknown,,