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 1.10 2004/11/01 16:24:50 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
34 let is_ws_re = Pcre.regexp "^\\s*$"
35 let is_whitespace str = Pcre.pmatch ~rex:is_ws_re str
37 (* Valid image names. *)
38 let image_ok_re = Pcre.regexp "^[a-z0-9][-._a-z0-9]*\\.(jpg|jpeg|gif|ico|png)$"
40 let run r (q : cgi) (dbh : Dbi.connection) hostid { hostname = hostname } user=
41 let name = q#param "name" in
42 let alt = q#param "alt" in
43 let title = q#param "title" in
44 let longdesc = q#param "longdesc" in
45 let clazz = q#param "class" in
47 (* See if there was an upload. *)
50 let upload = q#upload "file" in
54 error ~title:"No image" ~back_button:true
55 q "No image was uploaded.";
58 (* Check the name is valid. *)
59 if not (Pcre.pmatch ~rex:image_ok_re name) then (
60 error ~title:"Bad Image Name" ~back_button:true
61 q ("The Image Name must contain only lowercase English letters, " ^
62 "numbers, dots, dashes and underscore. " ^
63 "It must end with .jpg, .gif or .png " ^
64 "depending on the image format.");
68 (* Check the image is an image, and get the size. *)
69 let mime_type, width, height =
70 try image_identify image
73 error ~title:"Bad image" ~back_button:true
74 q ("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
91 q ("The Image Name extension has to match the image format. " ^
92 "For example if the image is in JPEG format, the name must " ^
93 "be 'something.jpg'. I detected the following image type " ^
94 "in the file you uploaded: " ^ mime_type);
98 (* Check some ALT text was supplied. *)
99 if is_whitespace alt then (
100 error ~title:"Missing Alt text" ~back_button:true
101 q ("You must supply Alt text describing the image. This is required " ^
102 "by accessibility laws and to allow search engines to discover the " ^
103 "content of images.");
107 let title = if is_whitespace title then `Null else `String title in
108 let longdesc = if is_whitespace longdesc then `Null else `String longdesc in
109 let clazz = if is_whitespace clazz then `Null else `String clazz in
111 (* Make a thumbnail of this image. *)
112 let thumbnail, tn_mime_type, tn_width, tn_height =
113 image_thumbnail image 120 120 in
115 (* Check if something with the same name already exists. If replace=1
116 * then we can replace it, otherwise we must present an error message.
118 let replace = q#param_true "replace" in
119 let sth = dbh#prepare_cached "select 1 from images
120 where hostid = ? and name = ?" in
121 sth#execute [`Int hostid; `String name];
123 let exists = try sth#fetch1int () = 1 with Not_found -> false in
126 if not replace then (
127 error ~title:"Image already exists" ~back_button:true
128 q ("An image with the same name already exists.");
131 let sth = dbh#prepare_cached "update images
132 set name_deleted = name, name = null
133 where hostid = ? and name = ?" in
134 sth#execute [`Int hostid; `String name];
138 (* Put the image into the database. *)
141 "insert into images (hostid, name, image, width, height, alt,
142 title, longdesc, class, thumbnail, tn_width,
143 tn_height, mime_type, tn_mime_type)
144 values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)" in
145 sth#execute [`Int hostid; `String name; `Binary image; `Int width;
146 `Int height; `String alt; title; longdesc; clazz;
147 `Binary thumbnail; `Int tn_width; `Int tn_height;
148 `String mime_type; `String tn_mime_type];
153 let subject = "Image " ^ name ^ " has been uploaded." in
155 "Page: http://" ^ hostname ^ "/_images" in
157 email_notify ~body ~subject ~user dbh hostid;
159 let buttons = [ ok_button "/_images" ] in
160 ok ~title:"Image uploaded" ~buttons
161 q "Image was uploaded successfully."
164 register_script ~restrict:[CanEdit] run