/usr/share/ada/adainclude/aws/aws-mime.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) 2000-2011, 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.Containers.Indefinite_Hashed_Maps;
with Ada.Directories;
with Ada.Strings.Fixed;
with Ada.Strings.Hash_Case_Insensitive;
with Ada.Strings.Maps;
with Ada.Strings.Unbounded;
with GNAT.Regexp;
with AWS.Config;
with AWS.Resources.Files;
with AWS.Utils;
package body AWS.MIME is
use Ada;
use Ada.Strings.Unbounded;
use GNAT;
Default_Content_Type : constant String := Application_Octet_Stream;
-- Default MIME Content Type used if nothing matches
-- Table regexp components
type R_MIME_Type is record
Regexp : GNAT.Regexp.Regexp; -- Filename Regexp
MIME_Type : Unbounded_String; -- Associated content type
end record;
type Node;
type Node_Access is access Node;
type Node is record
Item : R_MIME_Type;
Next : Node_Access;
end record;
function Equivalent_Keys (Left, Right : String) return Boolean;
package Key_Value is new Ada.Containers.Indefinite_Hashed_Maps
(String, String, Ada.Strings.Hash_Case_Insensitive, Equivalent_Keys, "=");
-- Protected Set to access tables handling MIME types
protected Set is
function Get (Filename : String; Default : String) return String;
-- Returns Filename's MIME content type
function Extension (Content_Type : String) return String;
-- Returns the best guess of the extension to use for the Content Type
procedure Add_Extension (Ext : String; MIME_Type : String);
-- Add Ext to the set of known content type extensions
procedure Add_Regexp
(Filename : Regexp.Regexp;
MIME_Type : String);
-- Add Filename to the set of known content type regular expressions
private
Ext_Set : Key_Value.Map;
R_Table : Node_Access;
Last : Node_Access;
end Set;
function To_Lower (Item : String)
return String
renames Ada.Characters.Handling.To_Lower;
procedure Initialize;
-- Initialize MIME table
function Is_Type
(MIME_Type : String;
Type_Name : String) return Boolean;
pragma Inline (Is_Type);
-- Returns True if MIME_Type is of Type_Name type. The type name is the
-- first part of the MIME Type (the part before the /).
-------------------
-- Add_Extension --
-------------------
procedure Add_Extension (Ext : String; MIME_Type : String) is
begin
Set.Add_Extension (Ext, MIME_Type);
end Add_Extension;
----------------
-- Add_Regexp --
----------------
procedure Add_Regexp (Filename : String; MIME_Type : String) is
R_Filename : Regexp.Regexp;
begin
R_Filename := Regexp.Compile (Filename);
Set.Add_Regexp (R_Filename, MIME_Type);
exception
when Regexp.Error_In_Regexp =>
raise Constraint_Error
with "Regexp " & Filename & " can't be compiled";
end Add_Regexp;
------------------
-- Content_Type --
------------------
function Content_Type
(Filename : String;
Default : String := Application_Octet_Stream) return String is
begin
return Set.Get (Filename, Default => Default);
end Content_Type;
---------------------
-- Equivalent_Keys --
---------------------
function Equivalent_Keys (Left, Right : String) return Boolean is
begin
return To_Lower (Left) = To_Lower (Right);
end Equivalent_Keys;
---------------
-- Extension --
---------------
function Extension (Content_Type : String) return String is
begin
return Set.Extension (Content_Type);
end Extension;
----------------
-- Initialize --
----------------
procedure Initialize is
AWS_MIME : constant String := Config.MIME_Types (Config.Get_Current);
begin
-- Text
Set.Add_Extension ("css", Text_CSS);
Set.Add_Extension ("html", Text_HTML);
Set.Add_Extension ("htm", Text_HTML);
Set.Add_Extension ("txt", Text_Plain);
Set.Add_Extension ("ada", Text_Plain);
Set.Add_Extension ("ads", Text_Plain);
Set.Add_Extension ("adb", Text_Plain);
Set.Add_Extension ("c", Text_Plain);
Set.Add_Extension ("h", Text_Plain);
Set.Add_Extension ("xml", Text_XML);
Set.Add_Extension ("sgml", Text_X_SGML);
Set.Add_Extension ("sgm", Text_X_SGML);
Set.Add_Extension ("js", Text_Javascript);
-- Image
Set.Add_Extension ("gif", Image_Gif);
Set.Add_Extension ("jpg", Image_Jpeg);
Set.Add_Extension ("jpeg", Image_Jpeg);
Set.Add_Extension ("jpe", Image_Jpeg);
Set.Add_Extension ("png", Image_Png);
Set.Add_Extension ("tiff", Image_Tiff);
Set.Add_Extension ("tif", Image_Tiff);
Set.Add_Extension ("pnm", Image_X_Portable_Anymap);
Set.Add_Extension ("pbm", Image_X_Portable_Bitmap);
Set.Add_Extension ("pgm", Image_X_Portable_Graymap);
Set.Add_Extension ("ppm", Image_X_Portable_Pixmap);
Set.Add_Extension ("rgb", Image_X_RGB);
Set.Add_Extension ("xbm", Image_X_Xbitmap);
Set.Add_Extension ("xpm", Image_X_Xpixmap);
Set.Add_Extension ("xwd", Image_X_Xwindowdump);
-- Application
Set.Add_Extension ("ps", Application_Postscript);
Set.Add_Extension ("eps", Application_Postscript);
Set.Add_Extension ("ai", Application_Postscript);
Set.Add_Extension ("pdf", Application_Pdf);
Set.Add_Extension ("zip", Application_Zip);
Set.Add_Extension ("iso", Application_Octet_Stream);
Set.Add_Extension ("exe", Application_Octet_Stream);
Set.Add_Extension ("hqx", Application_Mac_Binhex40);
Set.Add_Extension ("doc", Application_Msword);
Set.Add_Extension ("ppt", Application_Powerpoint);
Set.Add_Extension ("rtf", Application_Rtf);
Set.Add_Extension ("Z", Application_X_Compress);
Set.Add_Extension ("gtar", Application_X_GTar);
Set.Add_Extension ("gz", Application_X_GZip);
Set.Add_Extension ("latex", Application_X_Latex);
Set.Add_Extension ("sh", Application_X_Sh);
Set.Add_Extension ("shar", Application_X_Shar);
Set.Add_Extension ("tar", Application_X_Tar);
Set.Add_Extension ("tgz", Application_X_GZip);
Set.Add_Extension ("tcl", Application_X_Tcl);
Set.Add_Extension ("tex", Application_X_Tex);
Set.Add_Extension ("texinfo", Application_X_Texinfo);
Set.Add_Extension ("texi", Application_X_Texinfo);
Set.Add_Extension ("t", Application_X_Troff);
Set.Add_Extension ("tr", Application_X_Troff);
Set.Add_Extension ("roff", Application_X_Troff);
Set.Add_Extension ("man", Application_X_Troff_Man);
-- Audio
Set.Add_Extension ("au", Audio_Basic);
Set.Add_Extension ("snd", Audio_Basic);
Set.Add_Extension ("mpga", Audio_Mpeg);
Set.Add_Extension ("mp2", Audio_Mpeg);
Set.Add_Extension ("mp3", Audio_Mpeg);
Set.Add_Extension ("wav", Audio_X_Wav);
Set.Add_Extension ("ram", Audio_X_Pn_Realaudio);
Set.Add_Extension ("rpm", Audio_X_Pn_Realaudio_Plugin);
Set.Add_Extension ("ra", Audio_X_Realaudio);
-- Video
Set.Add_Extension ("mpeg", Video_Mpeg);
Set.Add_Extension ("mpg", Video_Mpeg);
Set.Add_Extension ("mpe", Video_Mpeg);
Set.Add_Extension ("qt", Video_Quicktime);
Set.Add_Extension ("mov", Video_Quicktime);
Set.Add_Extension ("avi", Video_X_Msvideo);
-- Check if there is a aws.mime file to read
if Utils.Is_Regular_File (AWS_MIME) then
Load (MIME_File => AWS_MIME);
end if;
end Initialize;
--------------------
-- Is_Application --
--------------------
function Is_Application (MIME_Type : String) return Boolean is
begin
return Is_Type (MIME_Type, "application/");
end Is_Application;
--------------
-- Is_Audio --
--------------
function Is_Audio (MIME_Type : String) return Boolean is
begin
return Is_Type (MIME_Type, "audio/");
end Is_Audio;
--------------
-- Is_Image --
--------------
function Is_Image (MIME_Type : String) return Boolean is
begin
return Is_Type (MIME_Type, "image/");
end Is_Image;
-------------
-- Is_Text --
-------------
function Is_Text (MIME_Type : String) return Boolean is
begin
return Is_Type (MIME_Type, "text/");
end Is_Text;
-------------
-- Is_Type --
-------------
function Is_Type
(MIME_Type : String;
Type_Name : String) return Boolean is
begin
return MIME_Type'Length > Type_Name'Length
and then
To_Lower
(MIME_Type
(MIME_Type'First .. MIME_Type'First + Type_Name'Length - 1))
= Type_Name;
end Is_Type;
--------------
-- Is_Video --
--------------
function Is_Video (MIME_Type : String) return Boolean is
begin
return Is_Type (MIME_Type, "video/");
end Is_Video;
----------
-- Load --
----------
procedure Load (MIME_File : String) is
use type Strings.Maps.Character_Set;
MIME_Set : constant Strings.Maps.Character_Set :=
not Strings.Maps.To_Set (" " & ASCII.HT);
-- The token would be any characters sequence
-- other then space an tab.
File : Resources.File_Type;
Buffer : String (1 .. 1_024);
Last : Natural;
-- MIME type slice (M_First .. M_Last)
M_First : Positive;
M_Last : Natural;
-- Extension slice (E_First .. E_Last)
E_First : Positive;
E_Last : Natural;
begin
Resources.Files.Open (File, MIME_File);
while not Resources.End_Of_File (File) loop
Resources.Get_Line (File, Buffer, Last);
-- Look for the MIME type
Strings.Fixed.Find_Token
(Buffer (Buffer'First .. Last),
MIME_Set, Strings.Inside, M_First, M_Last);
E_First := M_Last + 1;
Read_Extension : loop
Strings.Fixed.Find_Token
(Buffer (E_First .. Last),
MIME_Set, Strings.Inside, E_First, E_Last);
exit Read_Extension when E_Last = 0;
if Buffer (E_First) = '/' and then Buffer (E_Last) = '/' then
-- Regular expression is inside slashes
Add_Regexp
(Buffer (E_First + 1 .. E_Last - 1),
Buffer (M_First .. M_Last));
else
Set.Add_Extension
(Buffer (E_First .. E_Last),
Buffer (M_First .. M_Last));
end if;
E_First := E_Last + 1;
end loop Read_Extension;
end loop;
Resources.Close (File);
end Load;
---------
-- Set --
---------
protected body Set is
-------------------
-- Add_Extension --
-------------------
procedure Add_Extension (Ext : String; MIME_Type : String) is
begin
Key_Value.Include (Ext_Set, Ext, MIME_Type);
end Add_Extension;
----------------
-- Add_Regexp --
----------------
procedure Add_Regexp
(Filename : Regexp.Regexp;
MIME_Type : String)
is
Item : constant R_MIME_Type
:= (Filename, To_Unbounded_String (MIME_Type));
begin
if R_Table = null then
R_Table := new Node'(Item, null);
Last := R_Table;
else
Last.Next := new Node'(Item, null);
Last := Last.Next;
end if;
end Add_Regexp;
---------------
-- Extension --
---------------
function Extension (Content_Type : String) return String is
begin
if Content_Type = Default_Content_Type then
null; -- We don't want to give unknown data the exe extension
elsif Content_Type = Text_Plain then
return "txt";
else
declare
Position : Key_Value.Cursor := Ext_Set.First;
begin
while Key_Value.Has_Element (Position) loop
if Key_Value.Element (Position) = Content_Type then
return Key_Value.Key (Position);
end if;
Key_Value.Next (Position);
end loop;
end;
end if;
return "";
end Extension;
---------
-- Get --
---------
function Get (Filename : String; Default : String) return String is
Ext : constant String := Directories.Extension (Filename);
Cursor : Key_Value.Cursor;
begin
Cursor := Key_Value.Find (Ext_Set, Ext);
if Key_Value.Has_Element (Cursor) then
return Key_Value.Element (Cursor);
else
-- Check now in regexp list
declare
N : Node_Access := R_Table;
begin
while N /= null loop
if Regexp.Match (Filename, N.Item.Regexp) then
return To_String (N.Item.MIME_Type);
end if;
N := N.Next;
end loop;
end;
end if;
return Default;
end Get;
end Set;
begin
Initialize;
end AWS.MIME;
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