Migrating issues to Github, please follow the new discussion here:
https://github.com/Mudlet/Mudlet/issues/570
This issue needs to be closed and there is no appropriate status, so
will set it to "Opinion" just for migration purposes.
** Changed in: mudlet
Status: In Progress => Opinion
** Bug watch added: github.com/Mudlet/Mudlet/issues #570
https://github.com/Mudlet/Mudlet/issues/570
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https://bugs.launchpad.net/bugs/1366781
Title:
Fake useragent string causing 406 Errors on Apache Servers with
default configuration
Status in Mudlet:
Opinion
Bug description:
From user Sanaki
On forums {http://forums.mudlet.org/viewtopic.php?f=9&t=4594}:
> downloadFile error 406 issue
>
> Sat Sep 06, 2014 5:14 am
> When attempting to download an image using downloadFile from my personal
server, it's throwing an error 406 message at me ("Not Acceptable", for those
unfamiliar). Fetching the same file from a browser works fine. I grabbed the
communication chain with wireshark to see what's going awry, but I can't see
anything obviously wrong there. Theoretically error 406 should mean the accept
header sent by Mudlet is wrong. Granted, I'm years out of practice when it
comes to dealing with apache, TCP, PHP, etc, but even still I'm wondering if
someone has insight. I noticed Akaya had the same issue here, which was left
unanswered.
> EDIT: I removed a bit of information here because I've identified
the issue, but have no simple solution. This is caused by apache
Mod_Security rule 900095, "Bad UA :: Fake Mozilla Agent". This will be
an issue on any server using the boilerplate Mod_Security rules, and
that includes irreparably most shared hosting providers. Mudlet
identifies itself with the full UA string "Mozilla/5.0". Updating this
to a more accurate UA would appear to fix the issue, though I'm unsure
what that would be. Is this something that can't be adjusted for some
reason?
======
> ... this is http and it's a response to Mudlet using a fake UserAgent
string to identify itself. Technically the 406 isn't an error, it's a perfectly
rational response to an unknown browser that's blatantly lying about what it is.
======
> I seem to have found the solution, though I have yet to test it. In the
source, in TLuaInterpreter.cpp, I believe inserting this line after line 8082
would solve our issue completely:
>> request.setRawHeader("User-Agent", "Mudlet 2.1");
> Now, that UA string can be changed to anything really, as long as
it's something that -isn't- "Mozilla/5.0", which is what it defaults
to. Realistically, if there's a variable accessible from there that
contains the current Mudlet version or such, that would probably be
best, but if so I have no idea where to find it. Or it could just be
"Mudlet".
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