File : adagio-http-header-parser.adb
------------------------------------------------------------------------------
-- ADAGIO - ADALID - AENEA. --
-- --
-- Copyright (C) 2003 --
-- A. Mosteo. --
-- --
-- Authors: A. Mosteo. (adagio@mosteo.com) --
-- --
-- If you have any questions in regard to this software, please address --
-- them to the above email. --
-- --
-- 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 --
-- the Free Software Foundation; either version 2 of the License, or (at --
-- your option) any later version. --
-- --
-- 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. --
-- --
-- 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. --
-- --
-- You are not allowed to use any part of this code to develop a program --
-- whose output would be used to harass or prosecute other users of the --
-- networks Adagio connects with. All data collected with Adagio or a tool --
-- containing Adagio code about other network users must remain --
-- confidential and cannot be made public by any mean, nor be used to --
-- harass or legally prosecute these users. --
------------------------------------------------------------------------------
-- $Id: adagio-http-header-parser.adb,v 1.5 2004/02/29 20:36:45 Jano Exp $
with Adagio.Socket;
with Adagio.Trace;
with Agpl.Streams.Memory_Arrays;
with Ada.Streams; use Ada.Streams;
package body Adagio.Http.Header.Parser is
Terminator : constant Stream_element_array := (13, 10, 13, 10);
-- Clean
procedure Reset (This : out Object) is
begin
This.Next := 1;
end Reset;
-- Check for new data to be read.
-- Can raise exception if connection is bad.
-- Can raise exception if not enough space.
procedure Check (This : in out Object; Sock : in Socket.Object) is
begin
if not Socket.Is_alive (Sock) then
Raise_exception (Socket.Socket_error'Identity,
"Http.Header.Parser.Check: Connection reset by peer");
end if;
while Socket.Available (Sock) > 0 and not Completed (This) loop
Stream_element'Read (
Socket.Stream (Sock),
This.Buffer (This.Next));
This.Next := This.Next + 1;
end loop;
exception
when Constraint_error =>
Trace.Log ("Http.Header.Parser.Check: Too many header data: " &
Agpl.Streams.To_string (This.Buffer.all), Trace.Warning);
raise;
end Check;
-- Check completed
function Completed (This : in Object) return Boolean is
begin
return
This.Next - This.Buffer'First > 4 and then
This.Buffer (This.Next - 4 .. This.Next - 1) = Terminator;
end;
-- Get a header set from a completed parsing:
procedure Get_headers (This : in out Object; Result : out Header.Set) is
Mem : aliased Agpl.Streams.Memory_Arrays.Stream_type (
This.Buffer);
begin
Header.Parse (Result, Mem'Access, Read_response => true, Clean => true);
end Get_headers;
procedure Adjust (This : in out Object) is
begin
This.Buffer := new Ada.Streams.Stream_Element_Array'(This.Buffer.all);
end Adjust;
procedure Finalize (This : in out Object) is
begin
Agpl.Streams.Free (This.Buffer);
end Finalize;
end Adagio.Http.Header.Parser;