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175 | ------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2005-2012, AdaCore --
-- --
-- This is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This software 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 --
-- distributed with this software; see file COPYING3. If not, go --
-- to http://www.gnu.org/licenses for a complete copy of the license. --
------------------------------------------------------------------------------
with Ada.Text_IO;
with Ada.Exceptions;
with Ada.Streams.Stream_IO;
with GNAT.MD5;
with AWS.Client;
with AWS.Digest;
with AWS.Server.Status;
with AWS.Status;
with AWS.MIME;
with AWS.Response;
with AWS.Messages;
with AWS.Utils;
procedure Partial is
use Ada;
use Ada.Streams;
use Ada.Text_IO;
use AWS;
use GNAT;
Filename : constant String := "partial.txt";
function CB (Request : Status.Data) return Response.Data;
function File_MD5 (Filename : String) return MD5.Message_Digest;
-- Compute the MD5 signature for Filename
procedure Dump_Response
(Id : String;
R : Response.Data;
Status_Only : Boolean := False);
-- Dump information about the response
HTTP : Server.HTTP;
Connect : Client.HTTP_Connection;
R : Response.Data;
P_MD5 : MD5.Message_Digest;
D_MD5 : MD5.Message_Digest;
--------
-- CB --
--------
function CB (Request : Status.Data) return Response.Data is
URI : constant String := Status.URI (Request);
Filename : constant String := URI (URI'First + 1 .. URI'Last);
begin
return Response.File (MIME.Content_Type (Filename), Filename);
end CB;
-------------------
-- Dump_Response --
-------------------
procedure Dump_Response
(Id : String;
R : Response.Data;
Status_Only : Boolean := False) is
begin
Text_IO.Put
(Id & " code="
& Messages.Status_Code'Image (Response.Status_Code (R)));
if Status_Only then
Text_IO.New_Line;
else
Text_IO.Put_Line
(" length="
& Response.Content_Length_Type'Image
(Response.Content_Length (R)));
end if;
end Dump_Response;
--------------
-- File_MD5 --
--------------
function File_MD5 (Filename : String) return MD5.Message_Digest is
File : Stream_IO.File_Type;
Buffer : Stream_Element_Array (1 .. 4 * 1_024);
Last : Stream_Element_Offset;
Ctx : MD5.Context;
begin
Stream_IO.Open (File, Stream_IO.In_File, Filename);
loop
Stream_IO.Read (File, Buffer, Last);
MD5.Update (Ctx, Buffer (1 .. Last));
exit when Last < Buffer'Last;
end loop;
Stream_IO.Close (File);
return MD5.Digest (Ctx);
end File_MD5;
begin
Server.Start
(HTTP, "Test Partial Download.", CB'Unrestricted_Access, Port => 0,
Max_Connection => 2);
-- Compute MD5
P_MD5 := File_MD5 (Filename);
Client.Create
(Connection => Connect, Host => AWS.Server.Status.Local_URL (HTTP));
-- Get file by chunck
declare
use type Client.Content_Bound;
URI : constant String := "/" & Filename;
Size : constant Utils.File_Size_Type := Utils.File_Size (Filename);
R1, R2, R3 : Response.Data;
File : Stream_IO.File_Type;
begin
Client.Get (Connect, R1, URI, (0, 1_023));
Dump_Response ("R1", R1);
Client.Get (Connect, R3, URI, (Client.Undefined, 1_024));
Dump_Response ("R3", R3);
Client.Get (Connect, R2, URI,
(1_024, Client.Content_Bound (Size) - 1_024 - 1));
Dump_Response ("R2", R2, Status_Only => True);
Stream_IO.Create (File, Stream_IO.Out_File, Filename & ".downloaded");
Stream_IO.Write (File, Response.Message_Body (R1));
Stream_IO.Write (File, Response.Message_Body (R2));
Stream_IO.Write (File, Response.Message_Body (R3));
Stream_IO.Close (File);
end;
Client.Close (Connect);
Server.Shutdown (HTTP);
-- Compute MD5 of downloaded file, and check with original file
D_MD5 := File_MD5 (Filename & ".downloaded");
if P_MD5 = D_MD5 then
Text_IO.Put_Line ("OK partial download");
else
Text_IO.Put_Line ("NOK partial download");
end if;
exception
when E : others =>
Put_Line ("Main Error " & Exceptions.Exception_Information (E));
Server.Shutdown (HTTP);
end Partial;
|