1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159 | ------------------------------------------------------------------------------
-- --
-- GNOGA - The GNU Omnificent GUI for Ada --
-- --
-- G N O G A . A P P L I C A T I O N . S I N G L E T O N --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 2014 David Botton --
-- --
-- This library 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 library 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
-- --
-- For more information please go to http://www.gnoga.com --
------------------------------------------------------------------------------
with Ada.Task_Identification;
with Ada.Unchecked_Deallocation;
with Gnoga.Server.Connection;
with Gnoga.Types;
with Gnoga.Gui.Navigator;
package body Gnoga.Application.Singleton is
Connection_ID : Gnoga.Types.Connection_ID := Gnoga.Types.No_Connection;
-- Set after Initialization
Application_Holder : Gnoga.Server.Connection.Connection_Holder_Type;
-- Used to block Initialize until On_Connect is called
Connection_Holder : Gnoga.Server.Connection.Connection_Holder_Type;
-- Used to hold the single incoming connection
procedure On_Connect
(ID : in Gnoga.Types.Connection_ID;
Connection : access Gnoga.Server.Connection.Connection_Holder_Type);
-- Connection On_Connect handler
---------------------
-- Web_Server_Task --
---------------------
task type Web_Server_Task is
entry Start;
end Web_Server_Task;
type Web_Server_Task_Access is access all Web_Server_Task;
Web_Server : Web_Server_Task_Access := null;
task body Web_Server_Task is
begin
accept Start;
Gnoga.Server.Connection.Run;
end Web_Server_Task;
----------------
-- On_Connect --
----------------
procedure On_Connect
(ID : in Gnoga.Types.Connection_ID;
Connection : access Gnoga.Server.Connection.Connection_Holder_Type)
is
procedure Free is new Ada.Unchecked_Deallocation (Web_Server_Task, Web_Server_Task_Access);
begin
if Connection_ID = Gnoga.Types.No_Connection then
Connection_ID := ID;
Application_Holder.Release;
Connection.Hold;
Connection_Holder.Release;
Gnoga.Server.Connection.Stop;
Free (Web_Server);
else
Gnoga.Server.Connection.Execute_Script (ID, "document.writeln ('Only one connection permitted.');");
end if;
end On_Connect;
----------------
-- Initialize --
----------------
procedure Initialize
(Main_Window : in out Gnoga.Gui.Window.Window_Type'Class;
Host : in String := "";
Port : in Integer := 8_080;
Boot : in String := "boot.html";
Verbose : in Boolean := True)
is
begin
Gnoga.Activate_Exception_Handler (Ada.Task_Identification.Current_Task);
Gnoga.Server.Connection.Initialize (Host, Port, Boot, Verbose);
if Verbose then
Gnoga.Write_To_Console ("Singleton application.");
Gnoga.Write_To_Console ("Press Ctrl-C to close server.");
end if;
Gnoga.Server.Connection.On_Connect_Handler (Event => On_Connect'Access);
Web_Server := new Web_Server_Task;
Web_Server.Start;
Application_Holder.Hold;
Main_Window.Attach (Connection_ID => Connection_ID);
Gnoga.Server.Connection.HTML_On_Close (Connection_ID, HTML_On_Close);
Main_Window.Document.Title (Title);
Log
("Sending to single route" & " for " & Gnoga.Gui.Navigator.User_Agent (Main_Window) & " on " &
Gnoga.Gui.Navigator.Platform (Main_Window) & " from " &
Gnoga.Server.Connection.Connection_Client_Address (Connection_ID));
end Initialize;
------------------
-- Message_Loop --
------------------
procedure Message_Loop is
begin
Connection_Holder.Hold;
end Message_Loop;
---------------------
-- End_Application --
---------------------
procedure End_Application is
begin
Gnoga.Server.Connection.Close (Connection_ID);
end End_Application;
end Gnoga.Application.Singleton;
|