91 lines
3.5 KiB
Prolog
91 lines
3.5 KiB
Prolog
/* Part of SWI-Prolog
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Author: Jan Wielemaker
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E-mail: J.Wielemaker@cs.vu.nl
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WWW: http://www.swi-prolog.org
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Copyright (C): 2009, VU University, 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 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_server_files,
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[ serve_files_in_directory/2 % +Alias, +HTTPRequest
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]).
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:- use_module(library(http/http_path)).
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:- use_module(library(http/http_dispatch)).
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/** <module> Serve files needed by modules from the server
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This module provides an infrastructure for serving resource-files such
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as icons, JavaScript, CSS files, etc. The default configuration serves
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the HTTP locations =icons=, =css= and =js= (see
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http_absolute_location/3)
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The location for these services can be changed by adding rules for
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http:location/3. Directories providing additional or alternative
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resources can be achieved by adding rules for user:file_search_path/2.
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*/
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:- multifile
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http:location/3. % Alias, Expansion, Options
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:- dynamic
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http:location/3. % Alias, Expansion, Options
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http:location(icons, root(icons), [ priority(-100) ]).
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http:location(css, root(css), [ priority(-100) ]).
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http:location(js, root(js), [ priority(-100) ]).
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:- multifile
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user:file_search_path/2.
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:- dynamic
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user:file_search_path/2.
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user:file_search_path(icons, library('http/web/icons')).
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user:file_search_path(css, library('http/web/css')).
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user:file_search_path(js, library('http/web/js')).
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:- http_handler(icons(.), serve_files_in_directory(icons), [prefix]).
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:- http_handler(css(.), serve_files_in_directory(css), [prefix]).
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:- http_handler(js(.), serve_files_in_directory(js), [prefix]).
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%% serve_files_in_directory(+Alias, +Request)
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%
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% Serve files from the directory Alias from the path-info from
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% Request. This predicate is used together with
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% file_search_path/2. Note that multiple clauses for the same
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% file_search_path alias can be used to merge files from different
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% physical locations onto the same HTTP directory. Note that the
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% handler must be declared as =prefix=. Here is an example:
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%
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% ==
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% user:file_search_path(icons, library('http/web/icons')).
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%
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% :- http_handler(icons(.), serve_files_in_directory(icons), [prefix]).
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% ==
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%
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% @see http_reply_file/3
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serve_files_in_directory(Alias, Request) :-
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memberchk(path_info(PathInfo), Request),
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Term =.. [Alias,PathInfo],
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http_reply_file(Term, [], Request).
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