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------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2004-2012, 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.Exceptions;
with Ada.Streams;
with Ada.Strings.Unbounded;
with Ada.Text_IO;
with AWS.Client;
with AWS.Messages;
with AWS.MIME;
with AWS.Net.Buffered;
with AWS.Response;
with AWS.Server.Status;
with AWS.Status;
with AWS.Utils;
package body Back_Pack is
use Ada;
use AWS;
WS : Server.HTTP;
Wait_Other_Call : constant String := "/wait-for-other-call";
Store_Socket : Net.Socket_Access;
Store_Keep_Alive : Boolean;
type String_Access is access constant String;
function CB (Request : Status.Data) return Response.Data;
-----------------
-- Wait_Socket --
-----------------
protected Wait_Socket is
entry Wait;
procedure Set;
private
Placed : Boolean := False;
end Wait_Socket;
--------
-- CB --
--------
function CB (Request : Status.Data) return Response.Data is
URI : constant String := Status.URI (Request);
begin
if URI = Wait_Other_Call then
Store_Socket :=
new Net.Socket_Type'Class'(Status.Socket (Request));
Store_Keep_Alive := Status.Keep_Alive (Request);
Wait_Socket.Set;
return Response.Socket_Taken;
else
Net.Buffered.Put_Line
(Store_Socket.all, Messages.Status_Line (Messages.S200));
if Store_Keep_Alive then
Net.Buffered.Put_Line
(Store_Socket.all, Messages.Connection ("Keep-Alive"));
else
Net.Buffered.Put_Line
(Store_Socket.all, Messages.Connection ("Close"));
end if;
declare
Data : constant Ada.Streams.Stream_Element_Array :=
Status.Binary_Data (Request);
begin
Net.Buffered.Put_Line
(Store_Socket.all, Messages.Content_Length (Data'Length));
Net.Buffered.New_Line (Store_Socket.all);
Net.Buffered.Write (Store_Socket.all, Data);
end;
Net.Buffered.Flush (Store_Socket.all);
if Store_Keep_Alive then
Server.Give_Back_Socket (Server.Get_Current.all, Store_Socket.all);
Net.Free (Store_Socket);
return Response.Build (MIME.Text_Plain, "was keep-alive.");
else
Net.Shutdown (Store_Socket.all);
Net.Free (Store_Socket);
return Response.Build (MIME.Text_Plain, "was closed.");
end if;
end if;
end CB;
-----------------
-- Wait_Socket --
-----------------
protected body Wait_Socket is
entry Wait when Placed is
begin
Placed := False;
end Wait;
procedure Set is
begin
Placed := True;
end Set;
end Wait_Socket;
---------
-- Run --
---------
procedure Run (Security : Boolean) is
task IO is
entry Start;
entry Put_Line (Str : String);
entry Put_Line_1 (Str : String);
entry Put_Line_2 (Str : String);
entry Stop;
end IO;
task Wait_Call is
entry Start (URL : String);
entry Next (Keep_Alive : Boolean);
entry Stop;
entry Stopped;
end Wait_Call;
--------
-- IO --
--------
task body IO is
procedure Write_Line (Str : String) is
begin
Ada.Text_IO.Put_Line (Str);
Ada.Text_IO.Flush;
end Write_Line;
begin
accept Start;
loop
select
accept Put_Line_1 (Str : String) do
Write_Line (Str);
end Put_Line_1;
accept Put_Line_2 (Str : String) do
Write_Line (Str);
end Put_Line_2;
or
accept Put_Line (Str : String) do
Write_Line (Str);
end Put_Line;
or
accept Stop;
exit;
end select;
end loop;
end IO;
---------------
-- Wait_Call --
---------------
task body Wait_Call is
use Ada.Strings.Unbounded;
R : Response.Data;
Connect : Client.HTTP_Connection;
Keep_Alive : Boolean;
URL : Unbounded_String;
begin
accept Start (URL : String) do
Wait_Call.URL := To_Unbounded_String (URL);
end Start;
Client.Create (Connect, To_String (URL));
loop
select
accept Next (Keep_Alive : Boolean) do
Wait_Call.Keep_Alive := Next.Keep_Alive;
end Next;
or
accept Stop;
exit;
end select;
if Keep_Alive then
Client.Get (Connect, R, Wait_Other_Call);
else
R := Client.Get (To_String (URL) & Wait_Other_Call);
end if;
IO.Put_Line_1 (Response.Message_Body (R));
end loop;
Client.Close (Connect);
accept Stopped;
exception
when E : others =>
Text_IO.Put_Line
(Text_IO.Standard_Error,
"Wait_Call error " & Ada.Exceptions.Exception_Information (E));
end Wait_Call;
begin
IO.Start;
begin
Server.Start
(WS,
"file",
CB'Access,
Security => Security,
Port => 0,
Max_Connection => 5);
exception
when others =>
IO.Stop;
raise;
end;
IO.Put_Line ("started");
declare
R : Response.Data;
URL : aliased constant String := AWS.Server.Status.Local_URL (WS);
begin
Wait_Call.Start (URL);
for J in 1 .. 10 loop
Wait_Call.Next (J rem 2 = 0);
Wait_Socket.Wait;
R := Client.Post
(URL,
"Data for transfer from one client to another "
& Integer'Image (J) & '.');
IO.Put_Line_2 (Response.Message_Body (R));
end loop;
end;
Wait_Call.Stop;
IO.Put_Line ("shutdown...");
IO.Stop;
Wait_Call.Stopped;
delay 1.0;
Server.Shutdown (WS);
Net.Free (Store_Socket);
exception
when E : others =>
Text_IO.Put_Line
(Text_IO.Standard_Error,
"Run error " & Ada.Exceptions.Exception_Information (E));
IO.Stop;
Wait_Call.Stopped;
end Run;
end Back_Pack;
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