| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- G N A T . C G I . C O O K I E -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2000-2003 Ada Core Technologies, Inc. -- |
| -- -- |
| -- 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 2, 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. See the GNU General Public License -- |
| -- for more details. You should have received a copy of the GNU General -- |
| -- Public License distributed with GNAT; see file COPYING. If not, write -- |
| -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- |
| -- MA 02111-1307, USA. -- |
| -- -- |
| -- 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. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| with Ada.Strings.Fixed; |
| with Ada.Strings.Maps; |
| with Ada.Text_IO; |
| with Ada.Integer_Text_IO; |
| |
| with GNAT.Table; |
| |
| package body GNAT.CGI.Cookie is |
| |
| use Ada; |
| |
| Valid_Environment : Boolean := False; |
| -- This boolean will be set to True if the initialization was fine. |
| |
| Header_Sent : Boolean := False; |
| -- Will be set to True when the header will be sent. |
| |
| -- Cookie data that have been added. |
| |
| type String_Access is access String; |
| |
| type Cookie_Data is record |
| Key : String_Access; |
| Value : String_Access; |
| Comment : String_Access; |
| Domain : String_Access; |
| Max_Age : Natural; |
| Path : String_Access; |
| Secure : Boolean := False; |
| end record; |
| |
| type Key_Value is record |
| Key, Value : String_Access; |
| end record; |
| |
| package Cookie_Table is new Table (Cookie_Data, Positive, 1, 5, 50); |
| -- This is the table to keep all cookies to be sent back to the server. |
| |
| package Key_Value_Table is new Table (Key_Value, Positive, 1, 1, 50); |
| -- This is the table to keep all cookies received from the server. |
| |
| procedure Check_Environment; |
| pragma Inline (Check_Environment); |
| -- This procedure will raise Data_Error if Valid_Environment is False. |
| |
| procedure Initialize; |
| -- Initialize CGI package by reading the runtime environment. This |
| -- procedure is called during elaboration. All exceptions raised during |
| -- this procedure are deferred. |
| |
| ----------------------- |
| -- Check_Environment -- |
| ----------------------- |
| |
| procedure Check_Environment is |
| begin |
| if not Valid_Environment then |
| raise Data_Error; |
| end if; |
| end Check_Environment; |
| |
| ----------- |
| -- Count -- |
| ----------- |
| |
| function Count return Natural is |
| begin |
| return Key_Value_Table.Last; |
| end Count; |
| |
| ------------ |
| -- Exists -- |
| ------------ |
| |
| function Exists (Key : String) return Boolean is |
| begin |
| Check_Environment; |
| |
| for K in 1 .. Key_Value_Table.Last loop |
| if Key_Value_Table.Table (K).Key.all = Key then |
| return True; |
| end if; |
| end loop; |
| |
| return False; |
| end Exists; |
| |
| ---------------------- |
| -- For_Every_Cookie -- |
| ---------------------- |
| |
| procedure For_Every_Cookie is |
| Quit : Boolean; |
| |
| begin |
| Check_Environment; |
| |
| for K in 1 .. Key_Value_Table.Last loop |
| Quit := False; |
| |
| Action (Key_Value_Table.Table (K).Key.all, |
| Key_Value_Table.Table (K).Value.all, |
| K, |
| Quit); |
| |
| exit when Quit; |
| end loop; |
| end For_Every_Cookie; |
| |
| ---------------- |
| -- Initialize -- |
| ---------------- |
| |
| procedure Initialize is |
| |
| HTTP_COOKIE : constant String := Metavariable (CGI.HTTP_Cookie); |
| |
| procedure Set_Parameter_Table (Data : String); |
| -- Parse Data and insert information in Key_Value_Table. |
| |
| ------------------------- |
| -- Set_Parameter_Table -- |
| ------------------------- |
| |
| procedure Set_Parameter_Table (Data : String) is |
| |
| procedure Add_Parameter (K : Positive; P : String); |
| -- Add a single parameter into the table at index K. The parameter |
| -- format is "key=value". |
| |
| Count : constant Positive |
| := 1 + Strings.Fixed.Count (Data, Strings.Maps.To_Set (";")); |
| -- Count is the number of parameters in the string. Parameters are |
| -- separated by ampersand character. |
| |
| Index : Positive := Data'First; |
| Sep : Natural; |
| |
| ------------------- |
| -- Add_Parameter -- |
| ------------------- |
| |
| procedure Add_Parameter (K : Positive; P : String) is |
| Equal : constant Natural := Strings.Fixed.Index (P, "="); |
| begin |
| if Equal = 0 then |
| raise Data_Error; |
| else |
| Key_Value_Table.Table (K) := |
| Key_Value'(new String'(Decode (P (P'First .. Equal - 1))), |
| new String'(Decode (P (Equal + 1 .. P'Last)))); |
| end if; |
| end Add_Parameter; |
| |
| begin |
| Key_Value_Table.Set_Last (Count); |
| |
| for K in 1 .. Count - 1 loop |
| Sep := Strings.Fixed.Index (Data (Index .. Data'Last), ";"); |
| |
| Add_Parameter (K, Data (Index .. Sep - 1)); |
| |
| Index := Sep + 2; |
| end loop; |
| |
| -- add last parameter |
| |
| Add_Parameter (Count, Data (Index .. Data'Last)); |
| end Set_Parameter_Table; |
| |
| begin |
| if HTTP_COOKIE /= "" then |
| Set_Parameter_Table (HTTP_COOKIE); |
| end if; |
| |
| Valid_Environment := True; |
| |
| exception |
| when others => |
| Valid_Environment := False; |
| end Initialize; |
| |
| --------- |
| -- Key -- |
| --------- |
| |
| function Key (Position : Positive) return String is |
| begin |
| Check_Environment; |
| |
| if Position <= Key_Value_Table.Last then |
| return Key_Value_Table.Table (Position).Key.all; |
| else |
| raise Cookie_Not_Found; |
| end if; |
| end Key; |
| |
| -------- |
| -- Ok -- |
| -------- |
| |
| function Ok return Boolean is |
| begin |
| return Valid_Environment; |
| end Ok; |
| |
| ---------------- |
| -- Put_Header -- |
| ---------------- |
| |
| procedure Put_Header |
| (Header : String := Default_Header; |
| Force : Boolean := False) |
| is |
| |
| procedure Output_Cookies; |
| -- Iterate through the list of cookies to be sent to the server |
| -- and output them. |
| |
| -------------------- |
| -- Output_Cookies -- |
| -------------------- |
| |
| procedure Output_Cookies is |
| |
| procedure Output_One_Cookie |
| (Key : String; |
| Value : String; |
| Comment : String; |
| Domain : String; |
| Max_Age : Natural; |
| Path : String; |
| Secure : Boolean); |
| -- Output one cookie in the CGI header. |
| |
| ----------------------- |
| -- Output_One_Cookie -- |
| ----------------------- |
| |
| procedure Output_One_Cookie |
| (Key : String; |
| Value : String; |
| Comment : String; |
| Domain : String; |
| Max_Age : Natural; |
| Path : String; |
| Secure : Boolean) |
| is |
| begin |
| Text_IO.Put ("Set-Cookie: "); |
| Text_IO.Put (Key & '=' & Value); |
| |
| if Comment /= "" then |
| Text_IO.Put ("; Comment=" & Comment); |
| end if; |
| |
| if Domain /= "" then |
| Text_IO.Put ("; Domain=" & Domain); |
| end if; |
| |
| if Max_Age /= Natural'Last then |
| Text_IO.Put ("; Max-Age="); |
| Integer_Text_IO.Put (Max_Age, Width => 0); |
| end if; |
| |
| if Path /= "" then |
| Text_IO.Put ("; Path=" & Path); |
| end if; |
| |
| if Secure then |
| Text_IO.Put ("; Secure"); |
| end if; |
| |
| Text_IO.New_Line; |
| end Output_One_Cookie; |
| |
| -- Start of processing for Output_Cookies |
| |
| begin |
| for C in 1 .. Cookie_Table.Last loop |
| Output_One_Cookie (Cookie_Table.Table (C).Key.all, |
| Cookie_Table.Table (C).Value.all, |
| Cookie_Table.Table (C).Comment.all, |
| Cookie_Table.Table (C).Domain.all, |
| Cookie_Table.Table (C).Max_Age, |
| Cookie_Table.Table (C).Path.all, |
| Cookie_Table.Table (C).Secure); |
| end loop; |
| end Output_Cookies; |
| |
| -- Start of processing for Put_Header |
| |
| begin |
| if Header_Sent = False or else Force then |
| Check_Environment; |
| Text_IO.Put_Line (Header); |
| Output_Cookies; |
| Text_IO.New_Line; |
| Header_Sent := True; |
| end if; |
| end Put_Header; |
| |
| --------- |
| -- Set -- |
| --------- |
| |
| procedure Set |
| (Key : String; |
| Value : String; |
| Comment : String := ""; |
| Domain : String := ""; |
| Max_Age : Natural := Natural'Last; |
| Path : String := "/"; |
| Secure : Boolean := False) is |
| begin |
| Cookie_Table.Increment_Last; |
| |
| Cookie_Table.Table (Cookie_Table.Last) := |
| Cookie_Data'(new String'(Key), |
| new String'(Value), |
| new String'(Comment), |
| new String'(Domain), |
| Max_Age, |
| new String'(Path), |
| Secure); |
| end Set; |
| |
| ----------- |
| -- Value -- |
| ----------- |
| |
| function Value |
| (Key : String; |
| Required : Boolean := False) |
| return String |
| is |
| begin |
| Check_Environment; |
| |
| for K in 1 .. Key_Value_Table.Last loop |
| if Key_Value_Table.Table (K).Key.all = Key then |
| return Key_Value_Table.Table (K).Value.all; |
| end if; |
| end loop; |
| |
| if Required then |
| raise Cookie_Not_Found; |
| else |
| return ""; |
| end if; |
| end Value; |
| |
| function Value (Position : Positive) return String is |
| begin |
| Check_Environment; |
| |
| if Position <= Key_Value_Table.Last then |
| return Key_Value_Table.Table (Position).Value.all; |
| else |
| raise Cookie_Not_Found; |
| end if; |
| end Value; |
| |
| -- Elaboration code for package |
| |
| begin |
| -- Initialize unit by reading the HTTP_COOKIE metavariable and fill |
| -- Key_Value_Table structure. |
| |
| Initialize; |
| end GNAT.CGI.Cookie; |