[KIO] Regarding KIO based redirection handling and header responses

[Aish Raj Dahal]

Respected members of the community,

First of all let me introduce myself. I am a Google Summer of Code 2012
student implementing Metalink/HTTP [RFC 6249] support in Kget. In most
basic terms my implementation involves receiving of the custom HTTP
response header fields sent by the server supporting Metalink/HTTP. I have
been trying to use KIO and extract the information from the custom HTTP
response headers sent back by the server, however it has been in vain.

I am using
http://download.services.openoffice.org/files/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gzto
check the Metalink/HTTP. It works fine while running

curl -sI
http://download.services.openoffice.org/files/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz

However, while doing so using KIO, I've encountered problems.
It seems that the header replies that KIO gets are of the redirected
download link, ( the same  as Konqueror gets it while typing the link in
the address bar)
However my objective is to prevent the redirection and directly obtain the
HTTP header response sent by the server.
I have tried with setRedirectionHandlingEnabled(false). But on doing this
there is no response and the program gets stuck.
On removing the redirection handling code and setting it to the defaults
the redirection presisits.


The output that(with the redirection left to defaults) I get is

"HTTP/1.1 200
OK
server:
nginx/0.8.54
date: Fri, 25 May 2012 14:32:56
GMT
content-type:
application/octet-stream
content-length: 8957266
last-modified: Mon, 17 Jan 2011 22:03:15 GMT
connection: close
accept-ranges: bytes"

And the output that I should be actually getting is:

HTTP/1.1 302 Found
Date: Fri, 25 May 2012 13:13:14 GMT
Server: Apache/2.2.22 (Linux/SUSE)
X-Prefix: 49.244.64.0/21
X-AS: 23752
X-MirrorBrain-Mirror: mirror.averse.net
X-MirrorBrain-Realm: region
Link: <
http://download.services.openoffice.org/files/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz.meta4>;
rel=describedby; type="application/metalink4+xml"
Link: <
http://download.services.openoffice.org/files/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz.torrent>;
rel=describedby; type="application/x-bittorrent"
Link: <
http://mirror.averse.net/openoffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz>;
rel=duplicate; pri=1; geo=sg
Link: <
http://ftp.isu.edu.tw/pub/OpenOffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz>;
rel=duplicate; pri=2; geo=tw
Link: <
http://ftp.twaren.net/OpenOffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz>;
rel=duplicate; pri=3; geo=tw
Link: <
http://ftp.kaist.ac.kr/openoffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz>;
rel=duplicate; pri=4; geo=kr
Link: <
http://mirror.yongbok.net/openoffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz>;
rel=duplicate; pri=5; geo=kr
Digest: MD5=chZROzRjy791zYb5mUhk3A==
Digest: SHA=nRgEtguiGxDlu8PKSxyBSc7TlGw=
Digest: SHA-256=VO2S9pgCq1lqgTFTKssVj6amn0npNdagtjI8ziDtiRQ=
Location:
http://mirror.averse.net/openoffice/stable/3.3.0/OOo-SDK_3.3.0_Linux_x86-64_install-deb_en-US.tar.gz
Connection: close
Content-Type: text/html; charset=iso-8859-1

My "practice" repository is at
https://github.com/ardahal/kio-learner/tree/master/showHttp

I hope you'll go through the code and help me with figuring out how to get
the desired result. :)

Thanks a lot.

Cheers
Aish
Google Summer of Code Student 2012
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