File : agpl-magnet.adb
------------------------------------------------------------------------------
-- ADAGIO - ADALID - AENEA. --
-- --
-- Copyright (C) 2003 --
-- A. Mosteo. --
-- --
-- Authors: A. Mosteo. (adagio@mosteo.com) --
-- --
-- If you have any questions in regard to this software, please address --
-- them to the above email. --
-- --
-- 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 General Public License --
-- along with this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- You are not allowed to use any part of this code to develop a program --
-- whose output would be used to harass or prosecute other users of the --
-- networks Adagio connects with. All data collected with Adagio or a tool --
-- containing Adagio code about other network users must remain --
-- confidential and cannot be made public by any mean, nor be used to --
-- harass or legally prosecute these users. --
------------------------------------------------------------------------------
-- $Id: agpl-http.ads,v 1.1 2004/01/21 21:05:53 Jano Exp $
with Agpl.Strings;
with Agpl.Strings.Fields;
package body Agpl.Magnet is
------------------------------------------------------------------------
-- Create --
------------------------------------------------------------------------
function Create (Url : in String) return Object is
begin
return (Url => U (Url));
end Create;
------------------------------------------------------------------------
-- Get_Attribute --
------------------------------------------------------------------------
-- Get any attribute of the magnet:
function Get_Attribute (This : in Object; Attr : in String) return String is
Url : String := S (This.Url);
Start : Natural := Strings.Pos (Url, Attr & "=");
Fin : Natural;
begin
if Start = 0 then
return "";
elsif Url (Start - 1) /= '?' and then Url (Start - 1) /= '&' then
return "";
else
Fin := Strings.Pos (Url, "&", Start + Attr'Length + 1);
if Fin = 0 then
return Url (Start + Attr'Length + 1 .. Url'Last);
else
return Url (Start + Attr'Length + 1 .. Fin - 1);
end if;
end if;
end Get_Attribute;
------------------------------------------------------------------------
-- Get_Hash_Type --
------------------------------------------------------------------------
function Get_Hash_Type (This : in Object) return String is
Hash : constant String := Get_Attribute (This, "xt");
begin
return Strings.Fields.Select_Field (Hash, 2, ':');
end Get_Hash_Type;
------------------------------------------------------------------------
-- Get_Hash_Value --
------------------------------------------------------------------------
function Get_Hash_Value (This : in Object) return String is
Hash : constant String := Get_Attribute (This, "xt");
begin
return Strings.Fields.Select_Field (Hash, 3, ':');
end Get_Hash_Value;
------------------------------------------------------------------------
-- Get_Name --
------------------------------------------------------------------------
function Get_Name (This : in Object) return String is
begin
return Get_Attribute (This, "dn");
end Get_Name;
------------------------------------------------------------------------
-- Is_Magnet --
------------------------------------------------------------------------
-- Says if a string is a Magnet link
function Is_Magnet (This : in String) return Boolean is
begin
return This'Length >= 8 and then This (This'First .. This'First + 7) = "magnet:?";
end Is_Magnet;
end Agpl.Magnet;