80 lines
2.9 KiB
Perl
80 lines
2.9 KiB
Perl
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/* $Id$
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Part of SWI-Prolog
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Author: Jan Wielemaker
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E-mail: jan@swi.psy.uva.nl
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WWW: http://www.swi-prolog.org
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Copyright (C): 1985-2002, University of Amsterdam
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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As a special exception, if you link this library with other files,
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compiled with a Free Software compiler, to produce an executable, this
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library does not by itself cause the resulting executable to be covered
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by the GNU General Public License. This exception does not however
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invalidate any other reasons why the executable file might be covered by
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the GNU General Public License.
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*/
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:- module(http_mime_plugin, []).
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:- use_module(http_client).
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:- use_module(library(memfile)).
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:- use_module(library(mime)).
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/** <module> MIME client plugin
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This plugin for library(http_client) automatically translates messages
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with content-type =|multipart/form-data|= into a list of Name = Value
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pairs, greatly simplifying the processing of forms with this type. It
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relies on library(mime), which in turn relies on a foreign
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implementation of the rfc2045 (mime) specifications.
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*/
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:- multifile
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http_client:http_convert_data/4,
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http_parameters:form_data_content_type/1.
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http_client:http_convert_data(In, Fields, Data, Options) :-
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memberchk(content_type(Type), Fields),
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( memberchk(mime_version(MimeVersion), Fields)
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; sub_atom(Type, 0, _, _, 'multipart/form-data'),
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MimeVersion = '1.0'
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), !,
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new_memory_file(MemFile),
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open_memory_file(MemFile, write, Tmp),
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format(Tmp, 'Mime-Version: ~w\n', [MimeVersion]),
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format(Tmp, 'Content-Type: ~w\n\n', [Type]),
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http_read_data(Fields, _, [in(In), to(stream(Tmp))|Options]),
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close(Tmp),
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open_memory_file(MemFile, read, MimeIn),
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mime_parse(stream(MimeIn), Data0),
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close(MimeIn),
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free_memory_file(MemFile),
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mime_to_form(Data0, Data).
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mime_to_form(mime(A,'',Parts), Form) :-
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memberchk(type('multipart/form-data'), A),
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mime_form_fields(Parts, Form), !.
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mime_to_form(Mime, Mime).
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mime_form_fields([], []).
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mime_form_fields([mime(A, V, [])|T0], [Name=V|T]) :-
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memberchk(name(Name), A),
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mime_form_fields(T0, T).
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http_parameters:form_data_content_type(ContentType) :-
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sub_atom(ContentType, 0, _, _, 'multipart/form-data').
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