/usr/share/ada/adainclude/aws/aws-headers-values.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 | ------------------------------------------------------------------------------
-- Ada Web Server --
-- --
-- Copyright (C) 2002-2009, 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.Strings.Fixed;
with Ada.Strings.Maps.Constants;
with AWS.Utils;
package body AWS.Headers.Values is
use Ada.Strings;
procedure Next_Value
(Data : String;
First : in out Natural;
Name_First : out Positive;
Name_Last : out Natural;
Value_First : out Positive;
Value_Last : out Natural);
-- Returns the next named or un-named value from Data. It start the search
-- from First index. Returns First = 0 if it has reached the end of
-- Data. Returns Name_Last = 0 if an un-named value has been found.
-----------------------
-- Get_Unnamed_Value --
-----------------------
function Get_Unnamed_Value
(Header_Value : String;
N : Positive := 1) return String
is
First : Natural;
Name_First : Positive;
Name_Last : Natural;
Value_First : Positive;
Value_Last : Natural;
Count : Natural := 0;
begin
First := Fixed.Index
(Source => Header_Value,
Set => Utils.Spaces,
Test => Outside);
if First = 0 then
-- Value is empty or contains only spaces
return "";
end if;
loop
Next_Value
(Header_Value, First,
Name_First, Name_Last,
Value_First, Value_Last);
if Name_Last = 0 then
Count := Count + 1;
if Count = N then
return Header_Value (Value_First .. Value_Last);
end if;
end if;
exit when First = 0;
end loop;
-- There is not such value, return the empty string
return "";
end Get_Unnamed_Value;
------------
-- Index --
------------
function Index
(Set : Values.Set;
Name : String;
Case_Sensitive : Boolean := True) return Natural
is
Map : Maps.Character_Mapping;
M_Name : Unbounded_String;
begin
if Case_Sensitive then
Map := Maps.Identity;
M_Name := To_Unbounded_String (Name);
else
Map := Maps.Constants.Upper_Case_Map;
M_Name := Translate (To_Unbounded_String (Name), Map);
end if;
for I in Set'Range loop
if Set (I).Named_Value
and then Translate (Set (I).Name, Map) = M_Name
then
return I;
end if;
end loop;
-- Name was not found, return 0
return 0;
end Index;
----------------
-- Next_Value --
----------------
procedure Next_Value
(Data : String;
First : in out Natural;
Name_First : out Positive;
Name_Last : out Natural;
Value_First : out Positive;
Value_Last : out Natural)
is
use type Maps.Character_Set;
EDel : constant Maps.Character_Set := Maps.To_Set (" ,;");
-- Delimiter between name/value pairs in the HTTP header lines.
-- In WWW-Authenticate, header delimiter between name="Value"
-- pairs is a comma.
-- In the Set-Cookie header, value delimiter between name="Value"
-- pairs is a semi-colon.
NVDel : constant Character := '=';
-- Delimiter between name and Value for a named value
VDel : constant Maps.Character_Set := EDel or Maps.To_Set (NVDel);
-- Delimiter between name and value is '=' and it is a space between
-- un-named values.
Last : Natural;
begin
Last := Fixed.Index (Data (First .. Data'Last), VDel);
Name_Last := 0;
Name_First := Positive'Last;
if Last = 0 then
-- This is the last single value
Value_First := First;
Value_Last := Data'Last;
First := 0; -- Mean end of line
elsif Data (Last) = '=' then
-- Here we have a named value
Name_First := First;
Name_Last := Last - 1;
First := Last + 1;
-- Check if this is a quoted or unquoted value
if First < Data'Last and then Data (First) = '"' then
-- Quoted value
Value_First := First + 1;
Last := Fixed.Index (Data (Value_First .. Data'Last), """");
if Last = 0 then
-- Format error as there is no closing quote
raise Format_Error
with "HTTP header line format error : " & Data;
else
Value_Last := Last - 1;
end if;
First := Last + 2;
else
-- Unquoted value
Value_First := First;
Last := Ada.Strings.Fixed.Index (Data (First .. Data'Last), EDel);
if Last = 0 then
Value_Last := Data'Last;
First := 0;
else
Value_Last := Last - 1;
First := Last + 1;
end if;
end if;
else
-- This is an un-named value
Value_First := First;
Value_Last := Last - 1;
First := Last + 1;
-- Do not return the delimiter as part of the value
while Maps.Is_In (Data (Value_Last), EDel) loop
Value_Last := Value_Last - 1;
end loop;
end if;
if First > Data'Last then
-- We have reached the end-of-line
First := 0;
elsif First > 0 then
-- Ignore the next leading spaces
First := Fixed.Index
(Source => Data (First .. Data'Last),
Set => Utils.Spaces,
Test => Outside);
end if;
end Next_Value;
-----------
-- Parse --
-----------
procedure Parse (Header_Value : String) is
First : Natural;
Name_First : Positive;
Name_Last : Natural;
Value_First : Positive;
Value_Last : Natural;
Quit : Boolean;
begin
-- Ignore the leading spaces
First := Fixed.Index
(Source => Header_Value,
Set => Utils.Spaces,
Test => Outside);
if First = 0 then
-- Value is empty or contains only spaces
return;
end if;
loop
Next_Value
(Header_Value, First,
Name_First, Name_Last,
Value_First, Value_Last);
Quit := False;
if Name_Last > 0 then
Named_Value
(Header_Value (Name_First .. Name_Last),
Header_Value (Value_First .. Value_Last),
Quit);
else
Value
(Header_Value (Value_First .. Value_Last),
Quit);
end if;
exit when Quit or else First = 0;
end loop;
end Parse;
------------
-- Search --
------------
function Search
(Header_Value : String;
Name : String;
Case_Sensitive : Boolean := True) return String
is
First : Natural;
Name_First : Positive;
Name_Last : Natural;
Value_First : Positive;
Value_Last : Natural;
Map : Maps.Character_Mapping;
M_Name : String (Name'Range);
-- Mapped name
begin
First := Fixed.Index
(Source => Header_Value,
Set => Utils.Spaces,
Test => Outside);
if First = 0 then
-- Value is empty or contains only spaces
return "";
end if;
if Case_Sensitive then
Map := Maps.Identity;
M_Name := Name;
else
Map := Maps.Constants.Upper_Case_Map;
M_Name := Fixed.Translate (Name, Map);
end if;
loop
Next_Value
(Header_Value, First,
Name_First, Name_Last,
Value_First, Value_Last);
if Name_Last > 0
and then
M_Name =
Fixed.Translate (Header_Value (Name_First .. Name_Last), Map)
then
return Header_Value (Value_First .. Value_Last);
end if;
exit when First = 0;
end loop;
-- Name not found, returns the empty string
return "";
end Search;
-----------
-- Split --
-----------
function Split (Header_Value : String) return Set is
First : Natural;
Null_Set : Set (1 .. 0);
function To_Set return Set;
-- Parse the Header_Value and return a set of named and un-named
-- value. Note that this routine is recursive as the final Set size is
-- not known. This should not be a problem as the number of token on an
-- Header_Line is quite small.
------------
-- To_Set --
------------
function To_Set return Set is
Name_First : Positive;
Name_Last : Natural;
Value_First : Positive;
Value_Last : Natural;
function Element return Data;
-- Returns the Data element from the substrings defined by
-- Name_First, Name_Last, Value_First, Value_Last.
-------------
-- Element --
-------------
function Element return Data is
function "+"
(Item : String)
return Unbounded_String
renames To_Unbounded_String;
begin
if Name_Last = 0 then
return Data'
(Named_Value => False,
Value => +Header_Value (Value_First .. Value_Last));
else
return Data'
(True,
Name => +Header_Value (Name_First .. Name_Last),
Value => +Header_Value (Value_First .. Value_Last));
end if;
end Element;
begin
if First = 0 then
-- This is the end of recursion
return Null_Set;
end if;
Next_Value
(Header_Value, First,
Name_First, Name_Last,
Value_First, Value_Last);
return Element & To_Set;
end To_Set;
begin
First := Fixed.Index
(Source => Header_Value,
Set => Utils.Spaces,
Test => Outside);
return To_Set;
end Split;
--------------------------
-- Unnamed_Value_Exists --
--------------------------
function Unnamed_Value_Exists
(Header_Value : String;
Value : String;
Case_Sensitive : Boolean := True) return Boolean
is
First : Natural;
Name_First : Positive;
Name_Last : Natural;
Value_First : Positive;
Value_Last : Natural;
Map : Maps.Character_Mapping;
M_Value : String (Value'Range);
begin
First := Fixed.Index
(Source => Header_Value,
Set => Utils.Spaces,
Test => Outside);
if First = 0 then
-- Value is empty or contains only spaces
return False;
end if;
if Case_Sensitive then
Map := Maps.Identity;
M_Value := Value;
else
Map := Maps.Constants.Upper_Case_Map;
M_Value := Fixed.Translate (Value, Map);
end if;
loop
Next_Value
(Header_Value, First,
Name_First, Name_Last,
Value_First, Value_Last);
if Name_Last = 0
and then M_Value = Fixed.Translate
(Header_Value (Value_First .. Value_Last), Map)
then
return True;
end if;
exit when First = 0;
end loop;
-- There is not such value
return False;
end Unnamed_Value_Exists;
end AWS.Headers.Values;
|