| Subject: | Excessively small Streaming size causes header to mix with content? |
| Date: | Fri, 31 Jul 2009 14:31:48 +0200 |
| To: | bug-POE-Component-Client-HTTP [...] rt.cpan.org |
| From: | Steve <x542d44174a72dfe3 [...] f4n.org> |
First a warning: I have tested this with POE-Component-Client-HTTP-0.890, but
my version of perl is ancient: 5.8.8 (don't laugh). If it works for you then
please close the bug.
Description: Posting a request with a very small Streaming size causes part of
the header to be recognized as content. If the server uses chunked responses,
the final "0" chunk is not taken as eof and the request does not finish until
it times out.
I don't know if there's any real use for such small Streaming sizes,
but if the smallest allowed size depends on the server's response,
then there is of course a problem anyway.
Sample code:
#!/usr/bin/perl
use POE;
use POE::Component::Client::HTTP;
use HTTP::Request::Common;
POE::Component::Client::HTTP->spawn( Alias => 'ua', Streaming => 30 );
POE::Session->create( inline_states => { _start => \&start, _stop => \&stop, got_data => \&got_data } );
POE::Kernel->run();
sub start { $_[KERNEL]->post( ua => request => got_data => GET( 'http://www.google.com/robots.txt' ) ) }
sub stop { print STDERR "stopping\n"; $_[KERNEL]->alias_remove( 'ua' ) }
sub got_data
{
unless ( $_[HEAP]->{printed}++ )
{
print STDERR "*** request:\n" . $_[ARG0]->[0]->as_string() . "\n***\n\n";
print STDERR "*** response:\n" . $_[ARG1]->[0]->as_string() . "\n***\n\n";
}
print STDERR "*** data:\n" . (defined($_[ARG1]->[1]) ? $_[ARG1]->[1] : "(eof)" ) . "\n***\n\n";
}
__END__
Output (cookie has been masked):
*** request:
GET http://www.google.com/robots.txt HTTP/1.1
Host: www.google.com
User-Agent: POE-Component-Client-HTTP/0.890 (perl; N; POE; en; rv:0.890000)
***
*** response:
HTTP/1.1 200 OK
Content-Type: text/plain
Last-Modified: Thu, 16 Jul 2009 15:25:04 GMT
Set-Cookie: PREF=ID=aaaaaaaaaaaaaaaa:TM=0000000000:LM=0000000000:S=aaaaaaaaaaaaaaaa; expires=Sun, 31-Jul-2011 12:06:10 GMT; path=/; domain=.google.com
***
*** data:
Date: Fri, 31 Jul 2009 12:06:
***
(snip, contains more of the header as well as the real data)
*** data:
maps_webmasters.xml
0
***
Seeing "Date:" as data is unexpected, and that last "0" is seen because the
HTTPChunk filter is never applied.
I'm brand new to POE, so sorry for not hunting it down further, or if it's just
because of some beginner's mistake on my part.