(* COCANWIKI - a wiki written in Objective CAML.
* Written by Richard W.M. Jones <rich@merjis.com>.
* Copyright (C) 2004 Merjis Ltd.
- * $Id: upload_image.ml,v 1.6 2004/09/09 12:21:22 rich Exp $
+ * $Id: upload_image.ml,v 1.11 2004/11/01 17:05:14 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
open Cocanwiki_ok
open Cocanwiki_emailnotify
open Cocanwiki_images
-
-let is_ws_re = Pcre.regexp "^\\s*$"
-let is_whitespace str = Pcre.pmatch ~rex:is_ws_re str
+open Cocanwiki_strings
(* Valid image names. *)
-let image_ok_re = Pcre.regexp "^[a-z0-9][_a-z0-9]*\\.(jpg|jpeg|gif|ico|png)$"
+let image_ok_re = Pcre.regexp "^[a-z0-9][-._a-z0-9]*\\.(jpg|jpeg|gif|ico|png)$"
-let run r (q : cgi) (dbh : Dbi.connection) hostid { hostname = hostname } _ =
+let run r (q : cgi) (dbh : Dbi.connection) hostid { hostname = hostname } user=
let name = q#param "name" in
let alt = q#param "alt" in
let title = q#param "title" in
(* See if there was an upload. *)
let image =
try
- let upload = q#upload "image" in
+ let upload = q#upload "file" in
upload.upload_value
with
Not_found ->
error ~title:"No image" ~back_button:true
q "No image was uploaded.";
- raise CgiExit in
+ return () in
(* Check the name is valid. *)
if not (Pcre.pmatch ~rex:image_ok_re name) then (
error ~title:"Bad Image Name" ~back_button:true
q ("The Image Name must contain only lowercase English letters, " ^
- "numbers and underscore. It must end with .jpg, .gif or .png " ^
+ "numbers, dots, dashes and underscore. " ^
+ "It must end with .jpg, .gif or .png " ^
"depending on the image format.");
- raise CgiExit
+ return ()
);
(* Check the image is an image, and get the size. *)
error ~title:"Bad image" ~back_button:true
q ("Unknown image type. Is the file you uploaded really an " ^
"image?");
- raise CgiExit in
+ return () in
(* Check the image filename extension matches the MIME type. *)
let ext_ok =
"For example if the image is in JPEG format, the name must " ^
"be 'something.jpg'. I detected the following image type " ^
"in the file you uploaded: " ^ mime_type);
- raise CgiExit
+ return ()
);
(* Check some ALT text was supplied. *)
- if is_whitespace alt then (
+ if string_is_whitespace alt then (
error ~title:"Missing Alt text" ~back_button:true
q ("You must supply Alt text describing the image. This is required " ^
"by accessibility laws and to allow search engines to discover the " ^
"content of images.");
- raise CgiExit
+ return ()
);
- let title = if is_whitespace title then `Null else `String title in
- let longdesc = if is_whitespace longdesc then `Null else `String longdesc in
- let clazz = if is_whitespace clazz then `Null else `String clazz in
+ let title = if string_is_whitespace title then `Null else `String title in
+ let longdesc =
+ if string_is_whitespace longdesc then `Null else `String longdesc in
+ let clazz = if string_is_whitespace clazz then `Null else `String clazz in
(* Make a thumbnail of this image. *)
let thumbnail, tn_mime_type, tn_width, tn_height =
image_thumbnail image 120 120 in
+ (* Check if something with the same name already exists. If replace=1
+ * then we can replace it, otherwise we must present an error message.
+ *)
+ let replace = q#param_true "replace" in
+ let sth = dbh#prepare_cached "select 1 from images
+ where hostid = ? and name = ?" in
+ sth#execute [`Int hostid; `String name];
+
+ let exists = try sth#fetch1int () = 1 with Not_found -> false in
+
+ if exists then (
+ if not replace then (
+ error ~title:"Image already exists" ~back_button:true
+ q ("An image with the same name already exists.");
+ return ()
+ ) else (
+ let sth = dbh#prepare_cached "update images
+ set name_deleted = name, name = null
+ where hostid = ? and name = ?" in
+ sth#execute [`Int hostid; `String name];
+ )
+ );
+
(* Put the image into the database. *)
let sth =
dbh#prepare_cached
let body = fun () ->
"Page: http://" ^ hostname ^ "/_images" in
- email_notify ~body ~subject dbh hostid;
+ email_notify ~body ~subject ~user dbh hostid;
let buttons = [ ok_button "/_images" ] in
ok ~title:"Image uploaded" ~buttons