1 (* COCANWIKI - a wiki written in Objective CAML.
2 * Written by Richard W.M. Jones <rich@merjis.com>.
3 * Copyright (C) 2004 Merjis Ltd.
4 * $Id: upload_image.ml,v 1.15 2006/12/06 09:46:57 rich Exp $
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; see the file COPYING. If not, write to
18 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
31 open Cocanwiki_emailnotify
33 open Cocanwiki_strings
35 (* Valid image names. *)
36 let image_ok_re = Pcre.regexp "^[a-z0-9][-._a-z0-9]*\\.(jpg|jpeg|gif|ico|png)$"
38 let run r (q : cgi) dbh hostid { hostname = hostname } user=
39 let name = q#param "name" in
40 let alt = q#param "alt" in
41 let title = q#param "title" in
42 let longdesc = q#param "longdesc" in
43 let clazz = q#param "class" in
45 (* See if there was an upload. *)
48 let upload = q#upload "file" in
52 error ~title:"No image" ~back_button:true
53 r dbh hostid q "No image was uploaded.";
56 (* Check the name is valid. *)
57 if not (Pcre.pmatch ~rex:image_ok_re name) then (
58 error ~title:"Bad Image Name" ~back_button:true
60 ("The Image Name must contain only lowercase English letters, " ^
61 "numbers, dots, dashes and underscore. " ^
62 "It must end with .jpg, .gif or .png " ^
63 "depending on the image format.");
67 (* Check the image is an image, and get the size. *)
68 let mime_type, width, height =
69 try image_identify image
72 error ~title:"Bad image" ~back_button:true
74 ("Unknown image type. Is the file you uploaded really an " ^
78 (* Check the image filename extension matches the MIME type. *)
82 String.ends_with name ".jpg" ||
83 String.ends_with name ".jpeg"
85 String.ends_with name ".gif"
87 String.ends_with name ".png"
88 | _ -> assert false in
90 error ~title:"Bad Image Name" ~back_button:true
92 ("The Image Name extension has to match the image format. " ^
93 "For example if the image is in JPEG format, the name must " ^
94 "be 'something.jpg'. I detected the following image type " ^
95 "in the file you uploaded: " ^ mime_type);
99 (* Check some ALT text was supplied. *)
100 if string_is_whitespace alt then (
101 error ~title:"Missing Alt text" ~back_button:true
103 ("You must supply Alt text describing the image. This is required " ^
104 "by accessibility laws and to allow search engines to discover the " ^
105 "content of images.");
109 let title = if string_is_whitespace title then None else Some title in
111 if string_is_whitespace longdesc then None else Some longdesc in
112 let clazz = if string_is_whitespace clazz then None else Some clazz in
114 (* Make a thumbnail of this image. *)
115 let thumbnail, tn_mime_type, tn_width, tn_height =
116 image_thumbnail image 120 120 in
118 (* Check if something with the same name already exists. If replace=1
119 * then we can replace it, otherwise we must present an error message.
121 let replace = q#param_true "replace" in
122 let rows = PGSQL(dbh) "select 1 from images
123 where hostid = $hostid and name = $name" in
124 let exists = rows = [Some 1l] in
127 if not replace then (
128 error ~title:"Image already exists" ~back_button:true
129 r dbh hostid q "An image with the same name already exists.";
132 PGSQL(dbh) "update images
133 set name_deleted = name, name = null
134 where hostid = $hostid and name = $name"
138 (* Put the image into the database. *)
139 let width = Int32.of_int width in
140 let height = Int32.of_int height in
141 let tn_width = Int32.of_int tn_width in
142 let tn_height = Int32.of_int tn_height in
144 "insert into images (hostid, name, image, width, height, alt,
145 title, longdesc, class, thumbnail, tn_width,
146 tn_height, mime_type, tn_mime_type)
147 values ($hostid, $name, $image, $width, $height, $alt, $?title,
148 $?longdesc, $?clazz, $thumbnail, $tn_width, $tn_height,
149 $mime_type, $tn_mime_type)";
154 let subject = "Image " ^ name ^ " has been uploaded." in
156 "Page: http://" ^ hostname ^ "/_images" in
158 email_notify ~body ~subject ~user dbh hostid;
160 let buttons = [ ok_button "/_images" ] in
161 ok ~title:"Image uploaded" ~buttons
162 r dbh hostid q "Image was uploaded successfully."
165 register_script ~restrict:[CanEdit] run