/* Part of SWI-Prolog Author: Jan Wielemaker E-mail: J.Wielemaker@cs.vu.nl WWW: http://www.swi-prolog.org Copyright (C): 2008-2015, University of Amsterdam VU University Amsterdam This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA As a special exception, if you link this library with other files, compiled with a Free Software compiler, to produce an executable, this library does not by itself cause the resulting executable to be covered by the GNU General Public License. This exception does not however invalidate any other reasons why the executable file might be covered by the GNU General Public License. */ :- module(http_open, [ http_open/3, % +URL, -Stream, +Options http_set_authorization/2 % +URL, +Authorization ]). :- use_module(library(uri)). :- use_module(library(readutil)). :- use_module(library(socket)). :- use_module(library(lists)). :- use_module(library(option)). :- use_module(library(error)). :- use_module(library(base64)). :- use_module(library(debug)). :- use_module(library(apply)). :- use_module(library(http/http_header), [http_parse_header/2]). /** Simple HTTP client This library provides a light-weight HTTP client library to get the data from a URL. The functionality of the library can be extended by loading two additional modules that acts as plugins: * library(http/http_chunked) Loading this library causes http_open/3 to support chunked transfer encoding. * library(http/http_header) Loading this library causes http_open/3 to support the =POST= method in addition to =GET=, =HEAD= and =DELETE=. * library(http/http_ssl_plugin) Loading this library causes http_open/3 HTTPS connections. Relevant options for SLL certificate handling are handed to ssl_context/3. This plugin is loaded automatically if the scheme `https` is requested using a default SSL context. See the plugin for additional information regarding security. Here is a simple example to fetch a web-page: == ?- http_open('http://www.google.com/search?q=prolog', In, []), copy_stream_data(In, user_output), close(In). prolog - Google Search