Why does this URL result in a 400 (Bad Request) error?

[John Moore]

Igor Sysoev wrote:
> On Tue, Nov 03, 2009 at 08:07:25PM +0000, John Moore wrote:
>
>   
>> Hello,
>>
>> I'm puzzled by a problem we've been getting with URLs like this:
>>
>>
>> /webserviceakqa-geraldoflanagan_ais_JEzKjKps%2B0%2FAynL0G17OWg?line=cMyYNDWTMJCOFAMGPMHE
>>
>> nginx (version 0.6.35) is returning a Bad Request error, response code 
>> 400. The problem seems to be in the URL encoding of the string after the 
>> '_ais_' part - when there are no escaped characters (such as %2B), no 
>> error is returned. If it is a deliberate feature, is there some way I 
>> can bypass it?
>>     
>
> In my tests 0.5.36, 0.6.39, 0.7.63, 0.8.22 try to open
> "/path/to/webserviceakqa-geraldoflanagan_ais_JEzKjKps+0/AynL0G17OWg"
> and return 404. You may try to set error_log to info level to see 400 error
> reason.
>
>   
Thanks, Igor. It may just be to do with copying and pasting to the 
mailing list, but your URL is actually different - the problem section 
is not URL encoded ('JEzKjKps+0/AynL0G17OWg' instead of 
'JEzKjKps%2B0%2FAynL0G17OWg'). It appears to be the URL encoding which 
is actually causing the problem.

I'll try setting the log as you suggest.

JM