feedwordpress / wp-content / update-feeds.php

update-feeds.php in FeedWordPress 0.98, at wp-content/update-feeds.php

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1	<?php
2	# update-feeds.php: Instruct FeedWordPress to scan for fresh content
3	#
4	# Project: FeedWordPress
5	# URI: <http://projects.radgeek.com/feedwordpress>
6	# Author: Charles Johnson <technophilia@radgeek.com>
7	# License: GPL
8	# Version: 2005.11.06
9	#
10	# USAGE
11	# -----
12	# update-feeds.php is a useful script for instructing the FeedWordPress plugin
13	# to scan for fresh content on the feeds that it syndicates. This is handy if
14	# you want your syndication site to actually syndicate content, and you can't
15	# rely on all your contributors to send you an XML-RPC ping when they update.
16	#
17	# 1. Install FeedWordPress and activate the FeedWordPress plugin. (See
18	# <http://projects.radgeek.com/feedwordpress/install> if you need a guide
19	# for the perplexed.)
20	#
21	# 2. If you want to manually update one or more of your feeds, you can do
22	# so by pointing your web browser to the URI
23	# <http://xyz.com/wp-content/update-feeds.php>, where `http://xyz.com/` is
24	# replaced by the URI to your installation of WordPress. Log in as any
25	# user in your WordPress database and use the form to update.
26	#
27	# 3. To keep content up-to-date automatically, set up a cron job to run
28	# update-feeds.php locally:
29	#
30	# cd /path/to/wordpress/wp-content ; php update-feeds.php
31	#
32	# where `/path/to/wordpress` is replaced by the filesystem path to your
33	# installation of WordPress; or, if you don't have, or don't want to use,
34	# command-line PHP, you can send an HTTP POST request to the appropriate
35	# URI:
36	#
37	# curl --user user:pass http://xyz.com/wp-content/update-feeds.php -d update=quiet
38	#
39	# `user` and `pass` should be replaced by the username and password of
40	# a user in your WordPress database (you can create a dummy user for
41	# updates if you want; that's what I do). `http://xyz.com/` should be
42	# replaced by the URI to your installation of WordPress.
43	#
44	# Don't be afraid to run this cron job frequently. FeedWordPress staggers
45	# updates over time rather than checking all of the feeds every time the
46	# cron job runs, so even if the cron job runs every 10 minutes, each feed
47	# will, on average only be polled for updates once an hour or so (or less
48	# frequently if the feed author requests less frequent updates using
49	# the RSS <ttl> element or the syndication module elements).
50	#
51	# 4. If you want to update one of the feeds rather than all of them, then
52	# pass the URI and title as command-line arguments:
53	#
54	# $ php update-feeds.php http://radgeek.com
55	#
56	# or in the POST request:
57	#
58	# $ curl --user login:password http://xyz.com/wp-content/update-feeds.php -d uri=http://www.radgeek.com\&update=quiet
59	#
60	// Help us to pick out errors, if any.
61	ini_set('error_reporting', E_ALL & ~E_NOTICE);
62	ini_set('display_errors', true);
63	define('MAGPIE_DEBUG', true);
64
65	// Are we running from a web request or from the command line?
66	if (!isset($_SERVER['REQUEST_URI'])) :
67	$update_feeds_display = 'text/plain';
68	$update_feeds_invoke = 'cmd';
69	elseif (isset($_POST['update'])) :
70	if ($_POST['update'] == 'quiet') :
71	$update_feeds_display = 'text/plain';
72	$update_feeds_invoke = 'post';
73	$update_feeds_verbose = false;
74	elseif ($_POST['update'] == 'verbose') :
75	$update_feeds_display = 'text/plain';
76	$update_feeds_invoke = 'post';
77	$update_feeds_verbose = true;
78	else :
79	$update_feeds_display = 'text/html';
80	$update_feeds_invoke = 'post';
81	endif;
82	else :
83	$update_feeds_display = 'text/html';
84	$update_feeds_invoke = 'get';
85	endif;
86
87	require_once ('../wp-blog-header.php');
88
89	function update_feeds_mention ($feed) {
90	global $update_feeds_display;
91
92	if ($update_feeds_display=='text/html') :
93	echo "<li>Updating <cite>".$feed['link/name']."</cite> from <<a href=\""
94	.$feed['link/uri']."\">".$feed['link/uri']."</a>> ...</li>\n";
95	else :
96	echo "* Updating ".$feed['link/name']." from <".$feed['link/uri']."> ...\n";
97	endif;
98	flush();
99	}
100
101	# -- Don't change these unless you know what you're doing...
102	define ('RPC_MAGIC', 'tag:radgeek.com/projects/feedwordpress/'); // update all
103
104	// Query secret word from database
105	$rpc_secret = get_settings('feedwordpress_rpc_secret');
106
107	header("Content-Type: {$update_feeds_display}; charset=utf-8");
108
109	# -- Are we running from an HTTP GET, HTTP POST, or from the command line?
110	if ($update_feeds_invoke != 'cmd') : // We're acessing this from HTTP GET or HTTP POST
111	// Authenticate the user, if possible ...
112	if (isset($_SERVER['PHP_AUTH_USER']) and isset($_SERVER['PHP_AUTH_PW'])) : // try HTTP authentication
113	$login = $_SERVER['PHP_AUTH_USER']; $pass = $_SERVER['PHP_AUTH_PW'];
114	elseif (isset($_POST['log']) and isset($_POST['pwd'])) : // try POST data
115	$login = $_REQUEST['log']; $pass = $_REQUEST['pwd'];
116	endif;
117
118	if (empty($login) or empty($pass) or !wp_login($login, $pass)) :
119	if ($update_feeds_display=='text/html') :
120	auth_redirect(); // try authentication cookies; if all else fails, redirect to wp-login.php
121	else :
122	echo "update-feeds (".date('Y-m-d H:i:s')."): ERROR: Could not log in as '$login' (password: '$pass')\n";
123	die;
124	endif;
125	endif;
126
127	// Henceforward, we can proceed on the assumption that we have an authenticated user
128	$uri = (isset($_REQUEST['uri']) ? $_REQUEST['uri'] : RPC_MAGIC.$rpc_secret);
129
130	if ($update_feeds_display=='text/html') :
131	echo <<<EOHTML
132	<?xml version="1.0" encoding="utf-8"?>
133	<html>
134	<head>
135	<title>update-feeds :: FeedWordPress</title>
136	</head>
137
138	<body>
139	<h1>update-feeds: make FeedWordPress check for new syndicated content</h1>
140
141	EOHTML;
142	endif;
143	else :
144	// update-feeds has been invoked from the command line; no further
145	// authentication is necessary. (If PAM hasn't already done the
146	// necessary screening for you, you have bigger problems than their
147	// access to FeedWordPress...)
148	$uri = (isset($_SERVER['argv'][1]) ? $_SERVER['argv'][1] : RPC_MAGIC.$rpc_secret);
149	endif;
150
151	$feedwordpress =& new FeedWordPress;
152
153	if ($update_feeds_display=='text/html' or $update_feeds_verbose) :
154	add_action('feedwordpress_check_feed', 'update_feeds_mention');
155	endif;
156
157	if ($update_feeds_display=='text/html') : // HTTP GET or HTTP POST: add some web niceties
158
159	echo "<form action=\"\" method=\"POST\">\n";
160	echo "<select name=\"uri\">\n";
161	echo "<option value=\"".RPC_MAGIC.$rpc_secret."\">All feeds</option>\n";
162	foreach ($feedwordpress->feeds as $feed) :
163	echo "<option value=\"{$feed['link/uri']}\"";
164	if ($feed['link/uri']==$_REQUEST['uri']) : echo ' selected="selected"'; endif;
165	echo ">{$feed['link/name']}</option>\n";
166	endforeach;
167	echo "</select> ";
168	echo "<input type=\"submit\" name=\"update\" value=\"Update\" />\n";
169	echo "</form>\n";
170	endif;
171
172	if ($update_feeds_invoke != 'get') : // Only do things with side-effects for HTTP POST or command line
173	if ($update_feeds_display == 'text/html') : echo "<ul>\n"; endif;
174	$delta = @$feedwordpress->update($uri);
175	if ($update_feeds_display == 'text/html') : echo "</ul>\n"; endif;
176
177	if (is_null($delta)) :
178	if ($update_feeds_invoke == 'cmd') :
179	$stderr = fopen('php://stderr', 'w');
180	fputs($stderr, "update-feeds (".date('Y-m-d H:i:s')."): ERROR: I don't syndicate <$uri>\n");
181	elseif ($update_feeds_display == 'text/plain') :
182	echo "update-feeds (".date('Y-m-d H:i:s')."): ERROR: I don't syndicate <$uri>\n";
183	else :
184	echo "<p><strong>Error:</strong> I don't syndicate <a href=\"$uri\">$uri</a></p>\n";
185	endif;
186	elseif ($update_feeds_display=='text/html' or $update_feeds_verbose) :
187	$mesg = array();
188	if (isset($delta['new'])) : $mesg[] = ' '.$delta['new'].' new posts were syndicated'; endif;
189	if (isset($delta['updated'])) : $mesg[] = ' '.$delta['updated'].' existing posts were updated'; endif;
190	if ($update_feeds_display=='text/html') : echo "<p>"; endif;
191	echo "Update complete.".implode(' and', $mesg);
192	if ($update_feeds_display=='text/html') : echo "</p>"; endif;
193	echo "\n"; flush();
194	endif;
195	endif;
196
197	if ($update_feeds_display=='text/html') : // HTTP GET or HTTP POST: close off web niceties
198	echo <<<EOHTML
199
200	<p><a href="../wp-admin">← Return to WordPress Dashboard</a></p>
201	</body>
202	</html>
203	EOHTML;
204	endif;
205	?>
206