File : adagio-upload-resource-tth.adb
------------------------------------------------------------------------------
-- ADAGIO - ADALID - AENEA. --
-- --
-- Copyright (C) 2003 --
-- A. Mosteo. --
-- --
-- Authors: A. Mosteo. (adagio@mosteo.com) --
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-- If you have any questions in regard to this software, please address --
-- them to the above email. --
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-- 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 --
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-- 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. --
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-- along with this library; if not, write to the Free Software Foundation, --
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------------------------------------------------------------------------------
-- $Id: adagio-upload-resource-tth.adb,v 1.4 2004/01/29 21:47:10 Jano Exp $
-- Uploadable resources.
with Adagio.Library;
with Sha1;
with Ada.Unchecked_deallocation;
package body Adagio.Upload.Resource.TTH is
procedure Free is new Unchecked_deallocation (
MSU.Stream_type, MSU.Stream_access);
------------------------------------------------------------------------
-- Create --
------------------------------------------------------------------------
-- Creation
function Create (Target : in Adagio.File.Object) return Object_access is
O : Object_access := new Object;
begin
O.File := Target;
Library.Object.Export_TTH (Target, O.Data);
O.Source := new MSU.Stream_type (O.Data);
return O;
end Create;
------------------------------------------------------------------------
-- Id --
------------------------------------------------------------------------
-- Unique id for the resource, will identify it in queues.
function Id (This : in Object) return String is
begin
return "urn:sha1:" &
Sha1.To_base32 (Adagio.File.Sha (This.File));
end Id;
------------------------------------------------------------------------
-- Set_position --
------------------------------------------------------------------------
-- Set the starting position for its data. Call it before Stream.
procedure Set_position (This : in out Object; Position : in Natural) is
begin
MSU.Set_index (
This.Source.all,
Streams.Stream_element_offset (Position));
end Set_position;
------------------------------------------------------------------------
-- Stream --
------------------------------------------------------------------------
-- Get an stream for the resource binary data
procedure Stream (This : in out Object; Result : out Stream_access) is
begin
Result := Stream_access (This.Source);
end Stream;
------------------------------------------------------------------------
-- Content_type --
------------------------------------------------------------------------
-- Get the corresponding Content-Type: http header for the resource.
function Content_type (This : in Object) return String is
pragma Unreferenced (This);
begin
return "application/tigertree-breadthfirst";
end Content_type;
------------------------------------------------------------------------
-- Name --
------------------------------------------------------------------------
-- Descriptive name of the resource.
function Name (This : in Object) return String is
begin
return "TTH of " & Adagio.File.Name (This.File);
end Name;
------------------------------------------------------------------------
-- Size --
------------------------------------------------------------------------
-- Size in bytes of the resource.
function Size (This : in Object) return Natural is
begin
return Natural (This.Data'Length);
end Size;
------------------------------------------------------------------------
-- Qualify --
------------------------------------------------------------------------
-- Say if a resource qualifies according a criteria string:
function Qualify (This : in Object; Criteria : in String) return Boolean is
pragma Unreferenced (This);
pragma Unreferenced (Criteria);
begin
return true;
end Qualify;
------------------------------------------------------------------------
-- Finalize --
------------------------------------------------------------------------
procedure Finalize (This : in out Object) is
begin
Free (This.Source);
Adagio.Streams.Free (This.Data);
end Finalize;
end Adagio.Upload.Resource.TTH;