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: page.ml,v 1.16 2004/09/20 17:18:26 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.
30 open Cocanwiki_template
34 (* Maximum level of redirection. *)
37 type fp_status = FPOK of int * string * string * Dbi.datetime * bool
38 | FPRedirect of string
41 let run r (q : cgi) (dbh : Dbi.connection) hostid {edit_anon=edit_anon} user =
42 let template_page = get_template dbh hostid "page.html" in
43 let template_404 = get_template dbh hostid "page_404.html" in
45 let page = q#param "page" in
46 let page = if page = "" then "index" else page in
48 (* Host-specific fields. *)
49 let sth = dbh#prepare_cached "select css is not null,
50 feedback_email is not null
51 from hosts where id = ?" in
52 sth#execute [`Int hostid];
53 let has_host_css, has_feedback_email =
54 match sth#fetch1 () with
55 | [ `Bool has_host_css; `Bool has_feedback_email ] ->
56 has_host_css, has_feedback_email
57 | _ -> assert false in
59 (* Can the user edit? Manage users? etc. *)
60 let can_edit = can_edit edit_anon user in
61 let can_manage_users = can_manage_users user in
62 let can_manage_contacts = can_manage_contacts user in
64 (* This code generates ordinary pages. *)
65 let make_page title description pageid last_modified_date has_page_css
67 let t = template_page in
69 t#set "description" description;
70 t#set "pageid" (string_of_int pageid);
71 t#set "last_modified_date" (printable_date last_modified_date);
73 if page <> page' then (* redirection *) (
75 t#set "original_page" page; (* XXX title - get it from database *)
76 t#conditional "redirected" true
79 t#conditional "redirected" false
82 t#conditional "has_host_css" has_host_css;
83 t#conditional "has_page_css" has_page_css;
85 t#conditional "has_feedback_email" has_feedback_email;
87 t#conditional "can_edit" can_edit;
88 t#conditional "can_manage_users" can_manage_users;
89 t#conditional "can_manage_contacts" can_manage_contacts;
91 (* Pull out the sections in this page. *)
92 let sth = dbh#prepare_cached
93 "select ordering, sectionname, content, divname
97 sth#execute [`Int pageid];
101 (function [`Int ordering;
102 (`Null | `String _) as sectionname;
104 (`Null | `String _) as divname] ->
105 let divname, has_divname =
108 | `String divname -> divname, true in
109 let sectionname, has_sectionname =
110 match sectionname with
112 | `String sectionname -> sectionname, true in
113 let linkname = linkname_of_sectionname sectionname in
114 [ "ordering", Template.VarString (string_of_int ordering);
115 "has_sectionname", Template.VarConditional has_sectionname;
116 "sectionname", Template.VarString sectionname;
117 "linkname", Template.VarString linkname;
120 (Wikilib.xhtml_of_content dbh hostid content);
121 "has_divname", Template.VarConditional has_divname;
122 "divname", Template.VarString divname ]
123 | _ -> assert false) in
125 t#table "sections" sections;
127 (* Are we showing an old version of the page? If so, warn. *)
130 t#conditional "is_old_version" false
132 t#conditional "is_old_version" true;
133 t#set "old_version" (string_of_int pageid));
138 t#conditional "user_logged_in" false
139 | User (_, username, _) ->
140 t#conditional "user_logged_in" true;
141 t#set "username" username);
146 (* This code generates 404 pages. *)
148 Request.set_status r 404; (* Return a 404 error code. *)
150 let t = template_404 in
156 ('a'..'z' | 'A'..'Z' | '0'..'9') as c -> c
159 t#set "search_terms" search_terms;
161 t#conditional "has_host_css" has_host_css;
163 t#conditional "can_edit" can_edit;
164 t#conditional "can_manage_users" can_manage_users;
165 t#conditional "can_manage_contacts" can_manage_contacts;
170 (* Fetch a page by name. This function can give three answers:
171 * (1) Page fetched OK (fetches some details of the page).
172 * (2) Page is a redirect (fetches the name of the redirect page).
173 * (3) Page not found in database, ie. 404 error.
175 (* XXX Should do a case-insensitive matching of URLs, and if the URL differs
176 * in case only should redirect to the lowercase version.
178 let fetch_page page version allow_redirect =
181 if allow_redirect then (
184 "select redirect, id, title, description, last_modified_date,
186 from pages where hostid = ? and url = ?" in
187 sth#execute [`Int hostid; `String page];
189 (match sth#fetch1 () with
190 | [ `Null; `Int id; `String title; `String description;
191 `Timestamp last_modified_date; `Bool has_page_css ] ->
192 FPOK (id, title, description, last_modified_date,
194 | `String redirect :: _ ->
198 Not_found -> FPNotFound)
199 ) else (* redirects not allowed ... *) (
202 "select id, title, description, last_modified_date,
204 from pages where hostid = ? and url = ?" in
205 sth#execute [`Int hostid; `String page];
207 (match sth#fetch1 () with
208 | [ `Int id; `String title; `String description;
209 `Timestamp last_modified_date; `Bool has_page_css ] ->
210 FPOK (id, title, description, last_modified_date,
214 Not_found -> FPNotFound)
219 "select id, title, description, last_modified_date,
222 where hostid = ? and id = ? and
223 (url = ? or url_deleted = ?)" in
224 sth#execute [`Int hostid; `Int version;
225 `String page; `String page];
227 (match sth#fetch1 () with
228 | [ `Int id; `String title; `String description;
229 `Timestamp last_modified_date; `Bool has_page_css ] ->
230 FPOK (id, title, description, last_modified_date,
234 Not_found -> FPNotFound)
237 (* Here we deal with the complex business of redirects and versions. *)
238 (* Only allow the no_redirect and version syntax for editors. *)
239 let allow_redirect, version =
241 not (q#param_true "no_redirect"),
242 try Some (int_of_string (q#param "version")) with Not_found -> None
246 let rec loop page' i =
247 if i > max_redirect then (
248 error ~title:"Too many redirections" ~back_button:true
249 q ("Too many redirects between pages. This may happen because " ^
250 "of a cycle of redirections.");
253 match fetch_page page' version allow_redirect with
254 | FPOK (pageid, title, description, last_modified_date, has_page_css)->
255 make_page title description pageid last_modified_date has_page_css
257 | FPRedirect page' ->