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-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- G N A T . C G I . C O O K I E --
--- --
--- S p e c --
--- --
--- Copyright (C) 2000-2010, AdaCore --
--- --
--- GNAT is free software; you can redistribute it and/or modify it under --
--- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 3, or (at your option) any later ver- --
--- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
--- OUT 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/>. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- This is a package to interface a GNAT program with a Web server via the
--- Common Gateway Interface (CGI). It exports services to deal with Web
--- cookies (piece of information kept in the Web client software).
-
--- The complete CGI Cookie specification can be found in the RFC2109 at:
--- http://www.ics.uci.edu/pub/ietf/http/rfc2109.txt
-
--- This package builds up data tables whose memory is not released. A CGI
--- program is expected to be a short lived program and so it is adequate to
--- have the underlying OS free the program on exit.
-
-package GNAT.CGI.Cookie is
-
- -- The package will initialize itself by parsing the HTTP_Cookie runtime
- -- CGI environment variable during elaboration but we do not want to raise
- -- an exception at this time, so the exception Data_Error is deferred and
- -- will be raised when calling any services below (except for Ok).
-
- Cookie_Not_Found : exception;
- -- This exception is raised when a specific parameter is not found
-
- procedure Put_Header
- (Header : String := Default_Header;
- Force : Boolean := False);
- -- Output standard CGI header by default. This header must be returned
- -- back to the server at the very beginning and will be output only for
- -- the first call to Put_Header if Force is set to False. This procedure
- -- also outputs the Cookies that have been defined. If the program uses
- -- the GNAT.CGI.Put_Header service, cookies will not be set.
- --
- -- Cookies are passed back to the server in the header, the format is:
- --
- -- Set-Cookie: <key>=<value>; comment=<comment>; domain=<domain>;
- -- max_age=<max_age>; path=<path>[; secured]
-
- function Ok return Boolean;
- -- Returns True if the CGI cookie environment is valid and False otherwise.
- -- Every service used when the CGI environment is not valid will raise the
- -- exception Data_Error.
-
- function Count return Natural;
- -- Returns the number of cookies received by the CGI
-
- function Value
- (Key : String;
- Required : Boolean := False) return String;
- -- Returns the cookie value associated with the cookie named Key. If cookie
- -- does not exist, returns an empty string if Required is False and raises
- -- the exception Cookie_Not_Found otherwise.
-
- function Value (Position : Positive) return String;
- -- Returns the value associated with the cookie number Position of the CGI.
- -- It raises Cookie_Not_Found if there is no such cookie (i.e. Position >
- -- Count)
-
- function Exists (Key : String) return Boolean;
- -- Returns True if the cookie named Key exist and False otherwise
-
- function Key (Position : Positive) return String;
- -- Returns the key associated with the cookie number Position of the CGI.
- -- It raises Cookie_Not_Found if there is no such cookie (i.e. Position >
- -- Count)
-
- procedure Set
- (Key : String;
- Value : String;
- Comment : String := "";
- Domain : String := "";
- Max_Age : Natural := Natural'Last;
- Path : String := "/";
- Secure : Boolean := False);
- -- Add a cookie to the list of cookies. This will be sent back to the
- -- server by the Put_Header service above.
-
- generic
- with procedure
- Action
- (Key : String;
- Value : String;
- Position : Positive;
- Quit : in out Boolean);
- procedure For_Every_Cookie;
- -- Iterate through all cookies received from the server and call
- -- the Action supplied procedure. The Key, Value parameters are set
- -- appropriately, Position is the cookie order in the list, Quit is set to
- -- True by default. Quit can be set to False to control the iterator
- -- termination.
-
-end GNAT.CGI.Cookie;