[Catalyst] post - all empty?

[Josef Chladek]

Am 07.09.2007 um 16:44 schrieb Christopher H. Laco:

> Josef Chladek wrote:
>> hi list,
>>
>> I have a strange problem, that occurs for some clients, for most  
>> not: we
>> have a form, that is setup  by javascript dynamically (form  
>> consits of
>> one input field, one textarea and 2 hidden fields)
>>
>> ...
>> form.setAttribute('action','/cat/postings/post_comment');
>> form.setAttribute('id','input_form');
>> form.setAttribute('name','input_form');
>> form.setAttribute('method','post');
>> form.setAttribute('enctype','multipart/form-data');
>> form.setAttribute('accept-charset','utf-8');
>> form.setAttribute('onSubmit', 'return check(' + parent + ')');
>> ...
>>
>> as said, most of the time it works without a problem, but sometimes I
>> get the following error:
>>
>> [error] Caught exception in engine "Wrong Content-Length value:  
>> xxx at
>> /usr/local/share/perl/5.8.8/Catalyst.pm line 1636"
>>
>> which is thrown from Enigne.pm
>>
>> # paranoia against wrong Content-Length header
>> my $remaining = $length - $self->read_position;
>> if ( $remaining > 0 ) {
>>     $self->finalize_read($c);
>>     Catalyst::Exception->throw(
>>        "Wrong Content-Length value: $length" );
>> }
>>
>> from debugging I found out, that $remaining in fact is $length, so it
>> seems, that nothing was read from the post body
>>
>> HTTP::Body is version 0.9, I changed multipart/form-data to
>> application/x-www-form-urlencoded, still no effect.
>> to see the form, you have to be logged in, which works fine, I can
>> identify the user from the session, so cookie etc. working fine
>>
>> any clue what could happen here?
>>
>> thanks
>> josef
>
> If the Content-Length really is 0, I've found one thing over the years
> that does it. Older Mozilla/Netscape versions, usually CompuServe
> branded versions, would not POST and content of a form if  
> javascript set
> the forms style to display:none or hidden in CSS.
>
> In my case, if was the usual tinkerage of hiding the form and  
> displaying
> a "Now processing" image when a user clicked the Submit button.
>
> To this day, I still get the occasional Content-Length: 0 from these
> browsers...about 5 a week.
>
> Just a thought.

hmm, I dumped req->headers and this happens for IE7, IE6 and FF2.x,  
so not the oldest browsers.
I temp. switched to method get now, think that will work.
any hints on how I could get closer to the problem, where should I  
put debug code, somewhere in Engine.pm or Catalyst.pm?

thanks
josef