This file is indexed.

/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.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
------------------------------------------------------------------------------
--                              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;