[ic] Strange ic behavior with png image usertag created

[marco]

Good analisys David. True!

Runnnig it in pure perl get the warning:
libpng warning: Interlace handling should be turned on when using 
png_read_image

Found problem: warning from GD when reading firm logo to put on the pie 
chart created:
my $mylogo = newFromPng GD::Image("$PATH/logo.png");

Solved with:
https://stackoverflow.com/questions/12990602/libpng-warning-interlace-handling-should-be-turned-on-when-using-png-read-image

great thanks :-)

Il 13/12/2017 18:02, David Christensen ha scritto:
> It definitely sounds like the library is issuing a warning that gets
> output to the browser before the actual headers, so fixing this error
> would solve the issue.
>
>> On Dec 13, 2017, at 11:01 AM, David Christensen <david at endpoint.com
>> <mailto:david at endpoint.com>> wrote:
>>
>> I’m definitely curious about the specific error from libpng.  Can you
>> try running the equivalent UserTag code in pure perl and see what GD
>> is complaining about?
>>
>>> On Dec 13, 2017, at 10:52 AM, marco <m.mescoli at omnib.it
>>> <mailto:m.mescoli at omnib.it>> wrote:
>>>
>>> Il 10/12/2017 08:44, marco ha scritto:
>>>> Il 10/12/2017 04:03, David Christensen ha scritto:
>>>>>
>>>>>
>>>>>> On Dec 9, 2017, at 4:05 PM, marco <m.mescoli at omnib.it
>>>>>> <mailto:m.mescoli at omnib.it>
>>>>>> <mailto:m.mescoli at omnib.it>> wrote:
>>>>>>
>>>>>> With Variable DEBUG 1 in main configuration file interchange.cfg all
>>>>>> goes well but without ic DEBUG 1 web browser give
>>>>>> Internal Server Error and apache error.log give this:
>>>>>>
>>>>>> [Sat Dec 09 20:26:35.274482 2017] [http:error] [pid 680] [client
>>>>>> 192.168.11.2:58795] AH02429: Response header name 'libpng warning'
>>>>>> contains invalid characters, aborting request, referer: ...
>>>>>>
>>>>>> ... to ic page from where i call the usetag that give the error.
>>>>>>
>>>>>> Searching for this issue I have find this apache page:
>>>>>> https://blog.tigertech.net/posts/apache-cve-2016-8743/
>>>>>> that give responsability to malformed http header.
>>>>>>
>>>>>> my enviro:
>>>>>> - Debian GNU/Linux 9
>>>>>> - Interchange V5.10.0
>>>>>> - perl 5.24.1
>>>>>>
>>>>>> Any suggestions ?
>>>>>>
>>>>>> P.S.
>>>>>> I try to attach the usertag and the complete url that give the error
>>>>>> but mailer bounce back the message for suspicious header
>>>>>
>>>>> This information would be the most helpful; any way you can paste at an
>>>>> external site and provide a link?
>>>>>
>>>>> Best,
>>>>>
>>>>> David
>>>>> --
>>>>> David Christensen
>>>>> End Point Corporation
>>>>> david at endpoint.com <mailto:david at endpoint.com>
>>>>> <mailto:david at endpoint.com>
>>>>> 785-727-1171
>>> Some other tries reveal that the problem is not DEBUG global var but
>>> bound to the declaration of DebugFile in the main interchange.cfg
>>> configuration files. With commented line:
>>>
>>> #Variable DEBUG 1
>>>
>>> if I declare out of the the block ifdef @DEBUG this line:
>>>
>>> DebugFile debug.log
>>>
>>> i can display the chart pie, without or commented this declaration I
>>> obtain:
>>>
>>> Internal Server Error
>>>
>>> and this log from apache2 (Apache/2.4.25 (Debian)):
>>> [Wed Dec 13 17:31:17.115286 2017] [http:error] [pid 1054] [client
>>> 192.168.11.2:34071] AH02429: Response header name 'libpng warning'
>>> contains invalid characters, aborting request,
>>> referer:https://newweb.omnib.it/cgi-bin/elcat/stat_ass.html?giorno=13&mese=11&anno=2017&giorno2=13&mese2=12&anno2=2017&min=&max=&cod_cli=&cli_order=des_cli&cod_resp=&da_chiamata=&go.x=18&go.y=27
>>>
>>> --
>>> "Fino alla bara sinpara"
>>> "Up to demise we rize"
>>>
>>> _______________________________________________
>>> interchange-users mailing list
>>> interchange-users at icdevgroup.org
>>> <mailto:interchange-users at icdevgroup.org>
>>> http://www.icdevgroup.org/mailman/listinfo/interchange-users
>>
>> --
>> David Christensen
>> End Point Corporation
>> david at endpoint.com <mailto:david at endpoint.com>
>> 785-727-1171
>>
>>
>>
>
> --
> David Christensen
> End Point Corporation
> david at endpoint.com <mailto:david at endpoint.com>
> 785-727-1171
>
>
>
>
>
> _______________________________________________
> interchange-users mailing list
> interchange-users at icdevgroup.org
> http://www.icdevgroup.org/mailman/listinfo/interchange-users
>


-- 
"Fino alla bara sinpara"
"Up to demise we rize"