-(* COCANWIKI scripts.
+(* COCANWIKI - a wiki written in Objective CAML.
* Written by Richard W.M. Jones <rich@merjis.com>.
* Copyright (C) 2004 Merjis Ltd.
- * $Id: image.ml,v 1.4 2004/09/09 09:35:33 rich Exp $
+ * $Id: image.ml,v 1.16 2006/03/27 19:10:29 rich Exp $
+ *
+ * This program 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 program 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 program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
*)
open Apache
open Cgi
open Printf
+open ExtString
+
open Cocanwiki
-let run r (q : cgi) (dbh : Dbi.connection) hostid _ _ =
+let run r (q : cgi) dbh hostid {hostname = hostname} _ =
let image = q#param "image" in
let is_thumbnail = q#param_true "thumbnail" in
let version =
- try Some (int_of_string (q#param "version")) with Not_found -> None in
+ try Some (Int32.of_string (q#param "version")) with Not_found -> None in
(* Get the image and its MIME type. *)
- let what =
- if not is_thumbnail then "image, mime_type"
- else "thumbnail, tn_mime_type" in
- let where, args =
- match version with
- None -> "hostid = ? and name = ?", [`Int hostid; `String image]
- | Some version ->
- "hostid = ? and (name = ? or name_deleted = ?) and id = ?",
- [`Int hostid; `String image; `String image; `Int version] in
-
- let sth = dbh#prepare_cached
- ("select " ^ what ^ " from images where " ^ where) in
- sth#execute args;
-
- let data, mime_type =
- match sth#fetch1 () with
- [ `Binary data; `String mime_type ] ->
- data, mime_type
- | _ -> assert false in
-
- if version <> None then
- (* Set a medium-length expiry time on this resource. *)
- Table.set (Request.headers_out r) "Expires" (Cgi_expires.expires_medium());
+ let data, mime_type, deleted =
+ try
+ if not is_thumbnail then
+ List.hd (
+ match version with
+ | None ->
+ PGSQL(dbh) "select image, mime_type, name is null
+ from images
+ where hostid = $hostid and name = $image"
+ | Some version ->
+ PGSQL(dbh) "select image, mime_type, name is null
+ from images
+ where hostid = $hostid
+ and (name = $image or name_deleted = $image)
+ and id = $version"
+ )
+ else (
+ let data, mime_type, deleted =
+ List.hd (
+ match version with
+ | None ->
+ PGSQL(dbh) "select thumbnail, tn_mime_type, name is null
+ from images
+ where hostid = $hostid and name = $image"
+ | Some version ->
+ PGSQL(dbh) "select thumbnail, tn_mime_type, name is null
+ from images
+ where hostid = $hostid
+ and (name = $image or name_deleted = $image)
+ and id = $version"
+ ) in
+ Option.get data, Option.get mime_type, deleted
+ )
+ with
+ Not_found | ExtList.List.Empty_list ->
+ raise (HttpError cHTTP_NOT_FOUND) in
+
+ let deleted = Option.get deleted in
+
+ (* If deleted, refuse to serve this image except if shown on the site. *)
+ if deleted then (
+ let referer =
+ try Table.get (Request.headers_in r) "Referer" with Not_found -> "" in
+ let ok =
+ try ignore (String.find referer hostname); true
+ with Invalid_string -> false in
+
+ if not ok then (
+ prerr_endline "image.ml: bandwidth theft avoided";
+ raise (HttpError cHTTP_NOT_FOUND)
+ )
+ );
+
+ (* Set a medium-length expiry time on this resource. *)
+ Table.set (Request.headers_out r) "Expires" (Expires.medium ());
+
+ (* Content-length header. *)
+ Table.set (Request.headers_out r) "Content-Length"
+ (string_of_int (String.length data));
q#header ~content_type:mime_type ();
- print_string r data
+ ignore (print_string r data)
let () =
- register_script run
+ register_script ~restrict:[CanView] run
git.annexia.org / cocanwiki.git / blobdiff