[ic] Parsing of CGI GET/POST/PUT input

[Stefan Hornburg (Racke)]

Hello, Interchange developers!

We found on the IRC meeting on Tuesday:

--snip--
The character set conversion for file uploads happens in
Vend::Server::parse_multipart before we know which catalog the file upload
belongs to. David and Racke agreed that we store the character set for
each uploaded file in $CGI::file_encoding first and do the conversion in
Vend::Dispatch::open_cat just before the call to open_database().
Functions which write the data in $CGI::file to the file system need
to pass the corresponding value in $CGI::file_encoding to
Vend::File::writefile.
--snap--

Further investigation yielded that every CGI post parameter is subject
to this character set conversion _and_ that we don't know the character
set for the catalog.

I looked into the source code and found no reason to parse CGI
input ahead of calling Vend::Dispatch::open_cat. The only thing which
is used from CGI is $CGI::script_name.

My proposal is to postpone parsing of CGI parameters and run it
from inside open_cat.

Please comment.

Regards
	Racke

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