/usr/share/ada/adainclude/aws/aws-response-set.adb is in libaws2.10.2-dev 2.10.2-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- Ada Web Server --
-- --
-- Copyright (C) 2002-2011, AdaCore --
-- --
-- This library 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 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. 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. --
-- --
------------------------------------------------------------------------------
with Ada.Characters.Handling;
with Ada.Strings.Fixed;
with AWS.Resources.Streams.ZLib;
with AWS.Translator;
with AWS.Headers.Set;
with AWS.Digest;
with AWS.Resources.Streams.Memory.ZLib;
with ZLib;
package body AWS.Response.Set is
package RSM renames AWS.Resources.Streams.Memory;
procedure Check_Memory_Stream (D : in out Data);
pragma Inline (Check_Memory_Stream);
-- Test if the memory stream allocated and create it if necessary
procedure Clear_Memory_Stream (D : in out Data);
pragma Inline (Clear_Memory_Stream);
-- Test if the memory stream allocated and create it if necessary,
-- if the stream already created, clear it.
----------------
-- Add_Header --
----------------
procedure Add_Header
(D : in out Data;
Name : String;
Value : String) is
begin
Headers.Set.Add (D.Header, Name, Value);
end Add_Header;
-----------------
-- Append_Body --
-----------------
procedure Append_Body
(D : in out Data;
Item : Streams.Stream_Element_Array) is
begin
Check_Memory_Stream (D);
RSM.Append (RSM.Stream_Type'Class (D.Stream.all), Item);
end Append_Body;
procedure Append_Body (D : in out Data; Item : String) is
begin
Append_Body (D, Translator.To_Stream_Element_Array (Item));
end Append_Body;
--------------------
-- Authentication --
--------------------
procedure Authentication
(D : in out Data;
Realm : String;
Mode : Authentication_Mode := Basic;
Stale : Boolean := False)
is
N : Positive := 1;
-- The index for the update of WWW-Authenticate header values.
-- We are not using AWS.Headers.Set.Add routine for add WWW-Authenticate
-- header lines, because user could call this routine more than once.
begin
-- In case of Authenticate = Any
-- We should create both header lines
-- WWW-Authenticate: Basic
-- and
-- WWW-Authenticate: Digest
if Mode = Digest or else Mode = Any then
Headers.Set.Update
(D.Header,
Name => Messages.WWW_Authenticate_Token,
Value => "Digest qop=""auth"", realm=""" & Realm
& """, stale=""" & Boolean'Image (Stale)
& """, nonce="""
& String (AWS.Digest.Create_Nonce) & """",
N => N);
N := N + 1;
end if;
if Mode = Basic or else Mode = Any then
Headers.Set.Update
(D.Header,
Name => Messages.WWW_Authenticate_Token,
Value => "Basic realm=""" & Realm & """",
N => N);
end if;
D.Status_Code := Messages.S401;
end Authentication;
-------------------
-- Cache_Control --
-------------------
procedure Cache_Control
(D : in out Data;
Value : Messages.Cache_Option)
is
use type Messages.Cache_Option;
begin
if Value /= Messages.Unspecified then
Headers.Set.Update
(D.Header,
Name => Messages.Cache_Control_Token,
Value => String (Value));
if Strings.Fixed.Index (String (Value), "no-cache") /= 0 then
-- There is a no-cache option specified for the Cache-Control
-- header. Add "Pragma: no-cache" for compatibility with HTTP/1.0
-- protocol.
Headers.Set.Update
(D.Header, Name => Messages.Pragma_Token, Value => "no-cache");
end if;
end if;
end Cache_Control;
-------------------------
-- Check_Memory_Stream --
-------------------------
procedure Check_Memory_Stream (D : in out Data) is
use type Resources.Streams.Stream_Access;
begin
if D.Stream = null then
D.Stream := new RSM.Stream_Type;
D.Mode := Message;
end if;
end Check_Memory_Stream;
-----------
-- Clear --
-----------
procedure Clear (D : in out Data) is
use type Resources.Streams.Stream_Access;
begin
if D.Stream /= null then
if not D.Ref_Counter.Stream_Taken then
Resources.Streams.Close (D.Stream.all);
end if;
Unchecked_Free (D.Stream);
end if;
Headers.Set.Reset (D.Header);
D.Mode := No_Data;
D.Status_Code := Messages.S200;
D.Filename := Null_Unbounded_String;
end Clear;
-------------------------
-- Clear_Memory_Stream --
-------------------------
procedure Clear_Memory_Stream (D : in out Data) is
use type Resources.Streams.Stream_Access;
begin
if D.Stream = null then
D.Stream := new RSM.Stream_Type;
D.Mode := Message;
else
RSM.Clear (RSM.Stream_Type (D.Stream.all));
end if;
end Clear_Memory_Stream;
-------------------
-- Clear_Session --
-------------------
procedure Clear_Session (D : in out Data) is
begin
Add_Header (D, "Set-Cookie", "AWS=");
end Clear_Session;
--------------------
-- Close_Resource --
--------------------
procedure Close_Resource
(D : in out Data;
State : Boolean) is
begin
D.Close_Stream := State;
end Close_Resource;
------------------
-- Content_Type --
------------------
procedure Content_Type
(D : in out Data;
Value : String) is
begin
D.Content_Type := To_Unbounded_String (Value);
end Content_Type;
-------------------
-- Data_Encoding --
-------------------
procedure Data_Encoding
(D : in out Data;
Encoding : Messages.Content_Encoding;
Direction : Encoding_Direction := Encode)
is
use type Resources.Streams.Stream_Access;
Header : RSM.ZLib.Header_Type := ZLib.None;
begin
if D.Stream /= null then
-- The stream is already active, there is nothing to do, we can't
-- change the encoding when data has alredy been added into the
-- stream.
return;
end if;
D.Mode := Message;
case Encoding is
when Messages.Identity => D.Stream := new RSM.Stream_Type;
when Messages.GZip => Header := ZLib.GZip;
when Messages.Deflate => Header := ZLib.Default;
end case;
if D.Stream = null then
-- ZLib encoding/decoding is necessary
D.Stream := new RSM.ZLib.Stream_Type;
-- Create the encoding stream, now initialize it
if Direction = Encode then
RSM.ZLib.Deflate_Initialize
(RSM.ZLib.Stream_Type (D.Stream.all), Header => Header);
-- Set the Content-Encoding header value for server's response
--
-- Looks like IE in the Windows Mobile 5.0 do not understand
-- content coding in the upper case. Bug found in the
-- User-Agent:
-- Mozilla/4.0 (compatible; MSIE 4.01; Windows CE; PPC; 240x320)
Update_Header
(D,
Messages.Content_Encoding_Token,
Ada.Characters.Handling.To_Lower
(Messages.Content_Encoding'Image (Encoding)));
else
RSM.ZLib.Inflate_Initialize
(RSM.ZLib.Stream_Type (D.Stream.all), Header => Header);
end if;
end if;
end Data_Encoding;
-------------
-- Expires --
-------------
procedure Expires
(D : in out Data;
Value : Calendar.Time) is
begin
Expires (D, Messages.To_HTTP_Date (Value));
end Expires;
procedure Expires
(D : in out Data;
Value : String) is
begin
Headers.Set.Update
(D.Header,
Name => Messages.Expires_Token,
Value => Value);
end Expires;
--------------
-- Filename --
--------------
procedure Filename
(D : in out Data;
Value : String) is
begin
D.Filename := To_Unbounded_String (Value);
D.Mode := File;
end Filename;
--------------
-- Is_Valid --
--------------
function Is_Valid (D : Data) return Boolean is
use type Messages.Status_Code;
Redirection_Code : Boolean;
begin
case D.Status_Code is
when
Messages.S300 | -- Section 10.3.1: Multiple Choices
Messages.S301 | -- Section 10.3.2: Moved Permanently
Messages.S302 | -- Section 10.3.3: Found
Messages.S303 | -- Section 10.3.4: See Other
Messages.S305 | -- Section 10.3.6: Use Proxy
Messages.S307 -- Section 10.3.8: Temporary Redirect
=>
Redirection_Code := True;
when others =>
Redirection_Code := False;
end case;
return (Redirection_Code
xor not Headers.Exist
(D.Header,
Messages.Location_Token))
and then (D.Status_Code = Messages.S401
xor not Headers.Exist
(D.Header,
Messages.WWW_Authenticate_Token));
end Is_Valid;
--------------
-- Location --
--------------
procedure Location
(D : in out Data;
Value : String) is
begin
Headers.Set.Update
(D.Header,
Name => Messages.Location_Token,
Value => Value);
end Location;
------------------
-- Message_Body --
------------------
procedure Message_Body
(D : in out Data;
Value : Streams.Stream_Element_Array) is
begin
Clear_Memory_Stream (D);
RSM.Append (RSM.Stream_Type'Class (D.Stream.all), Value);
end Message_Body;
procedure Message_Body
(D : in out Data;
Value : String) is
begin
Message_Body (D, To_Unbounded_String (Value));
end Message_Body;
procedure Message_Body
(D : in out Data;
Value : Unbounded_String)
is
use Streams;
Chunk_Size : constant := 8 * 1_024;
Len : constant Natural := Length (Value);
First, Last : Natural;
begin
-- Prepare the memory stream
Clear_Memory_Stream (D);
First := 1;
loop
Last := Integer'Min (First + Chunk_Size - 1, Len);
RSM.Append
(RSM.Stream_Type'Class (D.Stream.all),
Translator.To_Stream_Element_Array (Slice (Value, First, Last)));
First := Last + 1;
exit when First > Len;
end loop;
end Message_Body;
----------
-- Mode --
----------
procedure Mode
(D : in out Data;
Value : Data_Mode) is
begin
D.Mode := Value;
end Mode;
-----------------
-- Read_Header --
-----------------
procedure Read_Header
(Socket : Net.Socket_Type'Class;
D : in out Data) is
begin
Headers.Set.Read (Socket, D.Header);
-- Set D.Content_Type with the value read from the socket
D.Content_Type := To_Unbounded_String
(Headers.Get (D.Header, Messages.Content_Type_Token));
end Read_Header;
-----------------
-- Status_Code --
-----------------
procedure Status_Code
(D : in out Data;
Value : Messages.Status_Code) is
begin
D.Status_Code := Value;
end Status_Code;
------------
-- Stream --
------------
procedure Stream
(D : in out Data;
Handle : not null access Resources.Streams.Stream_Type'Class;
Encoding : Messages.Content_Encoding := Messages.Identity)
is
use type Messages.Content_Encoding;
begin
case Encoding is
when Messages.GZip =>
D.Stream := Resources.Streams.ZLib.Deflate_Create
(Resources.Streams.Stream_Access (Handle),
Header => ZLib.GZip);
when Messages.Deflate =>
D.Stream := Resources.Streams.ZLib.Deflate_Create
(Resources.Streams.Stream_Access (Handle),
Header => ZLib.Default);
when Messages.Identity =>
D.Stream := Resources.Streams.Stream_Access (Handle);
end case;
if Encoding /= Messages.Identity then
-- We should not send "Content-Encoding: Identity" header line
--
-- RFC 2616
-- 3.5 Content Codings
-- ...
-- identity
-- The default (identity) encoding; the use of no transformation
-- whatsoever. This content-coding is used only in the Accept-
-- Encoding header, and SHOULD NOT be used in the Content-Encoding
-- header.
Update_Header
(D,
Messages.Content_Encoding_Token,
Ada.Characters.Handling.To_Lower
(Messages.Content_Encoding'Image (Encoding)));
elsif D.Header.Get (Messages.Content_Encoding_Token) /= "" then
raise Constraint_Error
with "Response content encoding is not supported.";
end if;
D.Mode := Stream;
end Stream;
-------------------
-- Update_Header --
-------------------
procedure Update_Header
(D : in out Data;
Name : String;
Value : String;
N : Positive := 1) is
begin
Headers.Set.Update (D.Header, Name, Value, N);
end Update_Header;
end AWS.Response.Set;
|