mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-18 00:25:37 +01:00
50cc9f757b
git-svn-id: http://svn.automattic.com/wordpress/trunk@3083 1a063a9b-81f0-0310-95a4-ce76da25c4cd
856 lines
21 KiB
PHP
856 lines
21 KiB
PHP
<?php
|
|
/*
|
|
* Project: MagpieRSS: a simple RSS integration tool
|
|
* File: A compiled file for RSS syndication
|
|
* Author: Kellan Elliott-McCrea <kellan@protest.net>
|
|
* Version: 0.51
|
|
* License: GPL
|
|
*/
|
|
|
|
define('RSS', 'RSS');
|
|
define('ATOM', 'Atom');
|
|
define('MAGPIE_USER_AGENT', 'WordPress/' . $wp_version);
|
|
|
|
class MagpieRSS {
|
|
var $parser;
|
|
var $current_item = array(); // item currently being parsed
|
|
var $items = array(); // collection of parsed items
|
|
var $channel = array(); // hash of channel fields
|
|
var $textinput = array();
|
|
var $image = array();
|
|
var $feed_type;
|
|
var $feed_version;
|
|
|
|
// parser variables
|
|
var $stack = array(); // parser stack
|
|
var $inchannel = false;
|
|
var $initem = false;
|
|
var $incontent = false; // if in Atom <content mode="xml"> field
|
|
var $intextinput = false;
|
|
var $inimage = false;
|
|
var $current_field = '';
|
|
var $current_namespace = false;
|
|
|
|
//var $ERROR = "";
|
|
|
|
var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright');
|
|
|
|
function MagpieRSS ($source) {
|
|
|
|
# if PHP xml isn't compiled in, die
|
|
#
|
|
if ( !function_exists('xml_parser_create') )
|
|
trigger_error( "Failed to load PHP's XML Extension. http://www.php.net/manual/en/ref.xml.php" );
|
|
|
|
$parser = @xml_parser_create();
|
|
|
|
if ( !is_resource($parser) )
|
|
trigger_error( "Failed to create an instance of PHP's XML parser. http://www.php.net/manual/en/ref.xml.php");
|
|
|
|
|
|
$this->parser = $parser;
|
|
|
|
# pass in parser, and a reference to this object
|
|
# setup handlers
|
|
#
|
|
xml_set_object( $this->parser, $this );
|
|
xml_set_element_handler($this->parser,
|
|
'feed_start_element', 'feed_end_element' );
|
|
|
|
xml_set_character_data_handler( $this->parser, 'feed_cdata' );
|
|
|
|
$status = xml_parse( $this->parser, $source );
|
|
|
|
if (! $status ) {
|
|
$errorcode = xml_get_error_code( $this->parser );
|
|
if ( $errorcode != XML_ERROR_NONE ) {
|
|
$xml_error = xml_error_string( $errorcode );
|
|
$error_line = xml_get_current_line_number($this->parser);
|
|
$error_col = xml_get_current_column_number($this->parser);
|
|
$errormsg = "$xml_error at line $error_line, column $error_col";
|
|
|
|
$this->error( $errormsg );
|
|
}
|
|
}
|
|
|
|
xml_parser_free( $this->parser );
|
|
|
|
$this->normalize();
|
|
}
|
|
|
|
function feed_start_element($p, $element, &$attrs) {
|
|
$el = $element = strtolower($element);
|
|
$attrs = array_change_key_case($attrs, CASE_LOWER);
|
|
|
|
// check for a namespace, and split if found
|
|
$ns = false;
|
|
if ( strpos( $element, ':' ) ) {
|
|
list($ns, $el) = split( ':', $element, 2);
|
|
}
|
|
if ( $ns and $ns != 'rdf' ) {
|
|
$this->current_namespace = $ns;
|
|
}
|
|
|
|
# if feed type isn't set, then this is first element of feed
|
|
# identify feed from root element
|
|
#
|
|
if (!isset($this->feed_type) ) {
|
|
if ( $el == 'rdf' ) {
|
|
$this->feed_type = RSS;
|
|
$this->feed_version = '1.0';
|
|
}
|
|
elseif ( $el == 'rss' ) {
|
|
$this->feed_type = RSS;
|
|
$this->feed_version = $attrs['version'];
|
|
}
|
|
elseif ( $el == 'feed' ) {
|
|
$this->feed_type = ATOM;
|
|
$this->feed_version = $attrs['version'];
|
|
$this->inchannel = true;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if ( $el == 'channel' )
|
|
{
|
|
$this->inchannel = true;
|
|
}
|
|
elseif ($el == 'item' or $el == 'entry' )
|
|
{
|
|
$this->initem = true;
|
|
if ( isset($attrs['rdf:about']) ) {
|
|
$this->current_item['about'] = $attrs['rdf:about'];
|
|
}
|
|
}
|
|
|
|
// if we're in the default namespace of an RSS feed,
|
|
// record textinput or image fields
|
|
elseif (
|
|
$this->feed_type == RSS and
|
|
$this->current_namespace == '' and
|
|
$el == 'textinput' )
|
|
{
|
|
$this->intextinput = true;
|
|
}
|
|
|
|
elseif (
|
|
$this->feed_type == RSS and
|
|
$this->current_namespace == '' and
|
|
$el == 'image' )
|
|
{
|
|
$this->inimage = true;
|
|
}
|
|
|
|
# handle atom content constructs
|
|
elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
|
|
{
|
|
// avoid clashing w/ RSS mod_content
|
|
if ($el == 'content' ) {
|
|
$el = 'atom_content';
|
|
}
|
|
|
|
$this->incontent = $el;
|
|
|
|
|
|
}
|
|
|
|
// if inside an Atom content construct (e.g. content or summary) field treat tags as text
|
|
elseif ($this->feed_type == ATOM and $this->incontent )
|
|
{
|
|
// if tags are inlined, then flatten
|
|
$attrs_str = join(' ',
|
|
array_map('map_attrs',
|
|
array_keys($attrs),
|
|
array_values($attrs) ) );
|
|
|
|
$this->append_content( "<$element $attrs_str>" );
|
|
|
|
array_unshift( $this->stack, $el );
|
|
}
|
|
|
|
// Atom support many links per containging element.
|
|
// Magpie treats link elements of type rel='alternate'
|
|
// as being equivalent to RSS's simple link element.
|
|
//
|
|
elseif ($this->feed_type == ATOM and $el == 'link' )
|
|
{
|
|
if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' )
|
|
{
|
|
$link_el = 'link';
|
|
}
|
|
else {
|
|
$link_el = 'link_' . $attrs['rel'];
|
|
}
|
|
|
|
$this->append($link_el, $attrs['href']);
|
|
}
|
|
// set stack[0] to current element
|
|
else {
|
|
array_unshift($this->stack, $el);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
function feed_cdata ($p, $text) {
|
|
|
|
if ($this->feed_type == ATOM and $this->incontent)
|
|
{
|
|
$this->append_content( $text );
|
|
}
|
|
else {
|
|
$current_el = join('_', array_reverse($this->stack));
|
|
$this->append($current_el, $text);
|
|
}
|
|
}
|
|
|
|
function feed_end_element ($p, $el) {
|
|
$el = strtolower($el);
|
|
|
|
if ( $el == 'item' or $el == 'entry' )
|
|
{
|
|
$this->items[] = $this->current_item;
|
|
$this->current_item = array();
|
|
$this->initem = false;
|
|
}
|
|
elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' )
|
|
{
|
|
$this->intextinput = false;
|
|
}
|
|
elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' )
|
|
{
|
|
$this->inimage = false;
|
|
}
|
|
elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
|
|
{
|
|
$this->incontent = false;
|
|
}
|
|
elseif ($el == 'channel' or $el == 'feed' )
|
|
{
|
|
$this->inchannel = false;
|
|
}
|
|
elseif ($this->feed_type == ATOM and $this->incontent ) {
|
|
// balance tags properly
|
|
// note: i don't think this is actually neccessary
|
|
if ( $this->stack[0] == $el )
|
|
{
|
|
$this->append_content("</$el>");
|
|
}
|
|
else {
|
|
$this->append_content("<$el />");
|
|
}
|
|
|
|
array_shift( $this->stack );
|
|
}
|
|
else {
|
|
array_shift( $this->stack );
|
|
}
|
|
|
|
$this->current_namespace = false;
|
|
}
|
|
|
|
function concat (&$str1, $str2="") {
|
|
if (!isset($str1) ) {
|
|
$str1="";
|
|
}
|
|
$str1 .= $str2;
|
|
}
|
|
|
|
function append_content($text) {
|
|
if ( $this->initem ) {
|
|
$this->concat( $this->current_item[ $this->incontent ], $text );
|
|
}
|
|
elseif ( $this->inchannel ) {
|
|
$this->concat( $this->channel[ $this->incontent ], $text );
|
|
}
|
|
}
|
|
|
|
// smart append - field and namespace aware
|
|
function append($el, $text) {
|
|
if (!$el) {
|
|
return;
|
|
}
|
|
if ( $this->current_namespace )
|
|
{
|
|
if ( $this->initem ) {
|
|
$this->concat(
|
|
$this->current_item[ $this->current_namespace ][ $el ], $text);
|
|
}
|
|
elseif ($this->inchannel) {
|
|
$this->concat(
|
|
$this->channel[ $this->current_namespace][ $el ], $text );
|
|
}
|
|
elseif ($this->intextinput) {
|
|
$this->concat(
|
|
$this->textinput[ $this->current_namespace][ $el ], $text );
|
|
}
|
|
elseif ($this->inimage) {
|
|
$this->concat(
|
|
$this->image[ $this->current_namespace ][ $el ], $text );
|
|
}
|
|
}
|
|
else {
|
|
if ( $this->initem ) {
|
|
$this->concat(
|
|
$this->current_item[ $el ], $text);
|
|
}
|
|
elseif ($this->intextinput) {
|
|
$this->concat(
|
|
$this->textinput[ $el ], $text );
|
|
}
|
|
elseif ($this->inimage) {
|
|
$this->concat(
|
|
$this->image[ $el ], $text );
|
|
}
|
|
elseif ($this->inchannel) {
|
|
$this->concat(
|
|
$this->channel[ $el ], $text );
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
function normalize () {
|
|
// if atom populate rss fields
|
|
if ( $this->is_atom() ) {
|
|
$this->channel['descripton'] = $this->channel['tagline'];
|
|
for ( $i = 0; $i < count($this->items); $i++) {
|
|
$item = $this->items[$i];
|
|
if ( isset($item['summary']) )
|
|
$item['description'] = $item['summary'];
|
|
if ( isset($item['atom_content']))
|
|
$item['content']['encoded'] = $item['atom_content'];
|
|
|
|
$this->items[$i] = $item;
|
|
}
|
|
}
|
|
elseif ( $this->is_rss() ) {
|
|
$this->channel['tagline'] = $this->channel['description'];
|
|
for ( $i = 0; $i < count($this->items); $i++) {
|
|
$item = $this->items[$i];
|
|
if ( isset($item['description']))
|
|
$item['summary'] = $item['description'];
|
|
if ( isset($item['content']['encoded'] ) )
|
|
$item['atom_content'] = $item['content']['encoded'];
|
|
|
|
$this->items[$i] = $item;
|
|
}
|
|
}
|
|
}
|
|
|
|
function is_rss () {
|
|
if ( $this->feed_type == RSS ) {
|
|
return $this->feed_version;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function is_atom() {
|
|
if ( $this->feed_type == ATOM ) {
|
|
return $this->feed_version;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function map_attrs($k, $v) {
|
|
return "$k=\"$v\"";
|
|
}
|
|
|
|
function error( $errormsg, $lvl = E_USER_WARNING ) {
|
|
// append PHP's error message if track_errors enabled
|
|
if ( isset($php_errormsg) ) {
|
|
$errormsg .= " ($php_errormsg)";
|
|
}
|
|
if ( MAGPIE_DEBUG ) {
|
|
trigger_error( $errormsg, $lvl);
|
|
} else {
|
|
error_log( $errormsg, 0);
|
|
}
|
|
}
|
|
|
|
}
|
|
require_once( dirname(__FILE__) . '/class-snoopy.php');
|
|
|
|
function fetch_rss ($url) {
|
|
// initialize constants
|
|
init();
|
|
|
|
if ( !isset($url) ) {
|
|
// error("fetch_rss called without a url");
|
|
return false;
|
|
}
|
|
|
|
// if cache is disabled
|
|
if ( !MAGPIE_CACHE_ON ) {
|
|
// fetch file, and parse it
|
|
$resp = _fetch_remote_file( $url );
|
|
if ( is_success( $resp->status ) ) {
|
|
return _response_to_rss( $resp );
|
|
}
|
|
else {
|
|
// error("Failed to fetch $url and cache is off");
|
|
return false;
|
|
}
|
|
}
|
|
// else cache is ON
|
|
else {
|
|
// Flow
|
|
// 1. check cache
|
|
// 2. if there is a hit, make sure its fresh
|
|
// 3. if cached obj fails freshness check, fetch remote
|
|
// 4. if remote fails, return stale object, or error
|
|
|
|
$cache = new RSSCache( MAGPIE_CACHE_DIR, MAGPIE_CACHE_AGE );
|
|
|
|
if (MAGPIE_DEBUG and $cache->ERROR) {
|
|
debug($cache->ERROR, E_USER_WARNING);
|
|
}
|
|
|
|
|
|
$cache_status = 0; // response of check_cache
|
|
$request_headers = array(); // HTTP headers to send with fetch
|
|
$rss = 0; // parsed RSS object
|
|
$errormsg = 0; // errors, if any
|
|
|
|
if (!$cache->ERROR) {
|
|
// return cache HIT, MISS, or STALE
|
|
$cache_status = $cache->check_cache( $url );
|
|
}
|
|
|
|
// if object cached, and cache is fresh, return cached obj
|
|
if ( $cache_status == 'HIT' ) {
|
|
$rss = $cache->get( $url );
|
|
if ( isset($rss) and $rss ) {
|
|
$rss->from_cache = 1;
|
|
if ( MAGPIE_DEBUG > 1) {
|
|
debug("MagpieRSS: Cache HIT", E_USER_NOTICE);
|
|
}
|
|
return $rss;
|
|
}
|
|
}
|
|
|
|
// else attempt a conditional get
|
|
|
|
// setup headers
|
|
if ( $cache_status == 'STALE' ) {
|
|
$rss = $cache->get( $url );
|
|
if ( $rss->etag and $rss->last_modified ) {
|
|
$request_headers['If-None-Match'] = $rss->etag;
|
|
$request_headers['If-Last-Modified'] = $rss->last_modified;
|
|
}
|
|
}
|
|
|
|
$resp = _fetch_remote_file( $url, $request_headers );
|
|
|
|
if (isset($resp) and $resp) {
|
|
if ($resp->status == '304' ) {
|
|
// we have the most current copy
|
|
if ( MAGPIE_DEBUG > 1) {
|
|
debug("Got 304 for $url");
|
|
}
|
|
// reset cache on 304 (at minutillo insistent prodding)
|
|
$cache->set($url, $rss);
|
|
return $rss;
|
|
}
|
|
elseif ( is_success( $resp->status ) ) {
|
|
$rss = _response_to_rss( $resp );
|
|
if ( $rss ) {
|
|
if (MAGPIE_DEBUG > 1) {
|
|
debug("Fetch successful");
|
|
}
|
|
// add object to cache
|
|
$cache->set( $url, $rss );
|
|
return $rss;
|
|
}
|
|
}
|
|
else {
|
|
$errormsg = "Failed to fetch $url. ";
|
|
if ( $resp->error ) {
|
|
# compensate for Snoopy's annoying habbit to tacking
|
|
# on '\n'
|
|
$http_error = substr($resp->error, 0, -2);
|
|
$errormsg .= "(HTTP Error: $http_error)";
|
|
}
|
|
else {
|
|
$errormsg .= "(HTTP Response: " . $resp->response_code .')';
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
$errormsg = "Unable to retrieve RSS file for unknown reasons.";
|
|
}
|
|
|
|
// else fetch failed
|
|
|
|
// attempt to return cached object
|
|
if ($rss) {
|
|
if ( MAGPIE_DEBUG ) {
|
|
debug("Returning STALE object for $url");
|
|
}
|
|
return $rss;
|
|
}
|
|
|
|
// else we totally failed
|
|
// error( $errormsg );
|
|
|
|
return false;
|
|
|
|
} // end if ( !MAGPIE_CACHE_ON ) {
|
|
} // end fetch_rss()
|
|
|
|
function _fetch_remote_file ($url, $headers = "" ) {
|
|
// Snoopy is an HTTP client in PHP
|
|
$client = new Snoopy();
|
|
$client->agent = MAGPIE_USER_AGENT;
|
|
$client->read_timeout = MAGPIE_FETCH_TIME_OUT;
|
|
$client->use_gzip = MAGPIE_USE_GZIP;
|
|
if (is_array($headers) ) {
|
|
$client->rawheaders = $headers;
|
|
}
|
|
|
|
@$client->fetch($url);
|
|
return $client;
|
|
|
|
}
|
|
|
|
function _response_to_rss ($resp) {
|
|
$rss = new MagpieRSS( $resp->results );
|
|
|
|
// if RSS parsed successfully
|
|
if ( $rss and !$rss->ERROR) {
|
|
|
|
// find Etag, and Last-Modified
|
|
foreach($resp->headers as $h) {
|
|
// 2003-03-02 - Nicola Asuni (www.tecnick.com) - fixed bug "Undefined offset: 1"
|
|
if (strpos($h, ": ")) {
|
|
list($field, $val) = explode(": ", $h, 2);
|
|
}
|
|
else {
|
|
$field = $h;
|
|
$val = "";
|
|
}
|
|
|
|
if ( $field == 'ETag' ) {
|
|
$rss->etag = $val;
|
|
}
|
|
|
|
if ( $field == 'Last-Modified' ) {
|
|
$rss->last_modified = $val;
|
|
}
|
|
}
|
|
|
|
return $rss;
|
|
} // else construct error message
|
|
else {
|
|
$errormsg = "Failed to parse RSS file.";
|
|
|
|
if ($rss) {
|
|
$errormsg .= " (" . $rss->ERROR . ")";
|
|
}
|
|
// error($errormsg);
|
|
|
|
return false;
|
|
} // end if ($rss and !$rss->error)
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: init
|
|
Purpose: setup constants with default values
|
|
check for user overrides
|
|
\*=======================================================================*/
|
|
function init () {
|
|
if ( defined('MAGPIE_INITALIZED') ) {
|
|
return;
|
|
}
|
|
else {
|
|
define('MAGPIE_INITALIZED', 1);
|
|
}
|
|
|
|
if ( !defined('MAGPIE_CACHE_ON') ) {
|
|
define('MAGPIE_CACHE_ON', 1);
|
|
}
|
|
|
|
if ( !defined('MAGPIE_CACHE_DIR') ) {
|
|
define('MAGPIE_CACHE_DIR', './cache');
|
|
}
|
|
|
|
if ( !defined('MAGPIE_CACHE_AGE') ) {
|
|
define('MAGPIE_CACHE_AGE', 60*60); // one hour
|
|
}
|
|
|
|
if ( !defined('MAGPIE_CACHE_FRESH_ONLY') ) {
|
|
define('MAGPIE_CACHE_FRESH_ONLY', 0);
|
|
}
|
|
|
|
if ( !defined('MAGPIE_DEBUG') ) {
|
|
define('MAGPIE_DEBUG', 0);
|
|
}
|
|
|
|
if ( !defined('MAGPIE_USER_AGENT') ) {
|
|
$ua = 'WordPress/' . $wp_version;
|
|
|
|
if ( MAGPIE_CACHE_ON ) {
|
|
$ua = $ua . ')';
|
|
}
|
|
else {
|
|
$ua = $ua . '; No cache)';
|
|
}
|
|
|
|
define('MAGPIE_USER_AGENT', $ua);
|
|
}
|
|
|
|
if ( !defined('MAGPIE_FETCH_TIME_OUT') ) {
|
|
define('MAGPIE_FETCH_TIME_OUT', 2); // 2 second timeout
|
|
}
|
|
|
|
// use gzip encoding to fetch rss files if supported?
|
|
if ( !defined('MAGPIE_USE_GZIP') ) {
|
|
define('MAGPIE_USE_GZIP', true);
|
|
}
|
|
}
|
|
|
|
function is_info ($sc) {
|
|
return $sc >= 100 && $sc < 200;
|
|
}
|
|
|
|
function is_success ($sc) {
|
|
return $sc >= 200 && $sc < 300;
|
|
}
|
|
|
|
function is_redirect ($sc) {
|
|
return $sc >= 300 && $sc < 400;
|
|
}
|
|
|
|
function is_error ($sc) {
|
|
return $sc >= 400 && $sc < 600;
|
|
}
|
|
|
|
function is_client_error ($sc) {
|
|
return $sc >= 400 && $sc < 500;
|
|
}
|
|
|
|
function is_server_error ($sc) {
|
|
return $sc >= 500 && $sc < 600;
|
|
}
|
|
|
|
class RSSCache {
|
|
var $BASE_CACHE = 'wp-content/cache'; // where the cache files are stored
|
|
var $MAX_AGE = 43200; // when are files stale, default twelve hours
|
|
var $ERROR = ''; // accumulate error messages
|
|
|
|
function RSSCache ($base='', $age='') {
|
|
if ( $base ) {
|
|
$this->BASE_CACHE = $base;
|
|
}
|
|
if ( $age ) {
|
|
$this->MAX_AGE = $age;
|
|
}
|
|
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: set
|
|
Purpose: add an item to the cache, keyed on url
|
|
Input: url from wich the rss file was fetched
|
|
Output: true on sucess
|
|
\*=======================================================================*/
|
|
function set ($url, $rss) {
|
|
global $wpdb;
|
|
$cache_option = 'rss_' . $this->file_name( $url );
|
|
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts';
|
|
|
|
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_option'") )
|
|
add_option($cache_option, '', '', 'no');
|
|
if ( !$wpdb->get_var("SELECT option_name FROM $wpdb->options WHERE option_name = '$cache_timestamp'") )
|
|
add_option($cache_timestamp, '', '', 'no');
|
|
|
|
update_option($cache_option, $rss);
|
|
update_option($cache_timestamp, time() );
|
|
|
|
return $cache_option;
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: get
|
|
Purpose: fetch an item from the cache
|
|
Input: url from wich the rss file was fetched
|
|
Output: cached object on HIT, false on MISS
|
|
\*=======================================================================*/
|
|
function get ($url) {
|
|
$this->ERROR = "";
|
|
$cache_option = 'rss_' . $this->file_name( $url );
|
|
|
|
if ( ! get_option( $cache_option ) ) {
|
|
$this->debug(
|
|
"Cache doesn't contain: $url (cache option: $cache_option)"
|
|
);
|
|
return 0;
|
|
}
|
|
|
|
$rss = get_option( $cache_option );
|
|
|
|
return $rss;
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: check_cache
|
|
Purpose: check a url for membership in the cache
|
|
and whether the object is older then MAX_AGE (ie. STALE)
|
|
Input: url from wich the rss file was fetched
|
|
Output: cached object on HIT, false on MISS
|
|
\*=======================================================================*/
|
|
function check_cache ( $url ) {
|
|
$this->ERROR = "";
|
|
$cache_option = $this->file_name( $url );
|
|
$cache_timestamp = 'rss_' . $this->file_name( $url ) . '_ts';
|
|
|
|
if ( $mtime = get_option($cache_timestamp) ) {
|
|
// find how long ago the file was added to the cache
|
|
// and whether that is longer then MAX_AGE
|
|
$age = time() - $mtime;
|
|
if ( $this->MAX_AGE > $age ) {
|
|
// object exists and is current
|
|
return 'HIT';
|
|
}
|
|
else {
|
|
// object exists but is old
|
|
return 'STALE';
|
|
}
|
|
}
|
|
else {
|
|
// object does not exist
|
|
return 'MISS';
|
|
}
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: serialize
|
|
\*=======================================================================*/
|
|
function serialize ( $rss ) {
|
|
return serialize( $rss );
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: unserialize
|
|
\*=======================================================================*/
|
|
function unserialize ( $data ) {
|
|
return unserialize( $data );
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: file_name
|
|
Purpose: map url to location in cache
|
|
Input: url from wich the rss file was fetched
|
|
Output: a file name
|
|
\*=======================================================================*/
|
|
function file_name ($url) {
|
|
return md5( $url );
|
|
}
|
|
|
|
/*=======================================================================*\
|
|
Function: error
|
|
Purpose: register error
|
|
\*=======================================================================*/
|
|
function error ($errormsg, $lvl=E_USER_WARNING) {
|
|
// append PHP's error message if track_errors enabled
|
|
if ( isset($php_errormsg) ) {
|
|
$errormsg .= " ($php_errormsg)";
|
|
}
|
|
$this->ERROR = $errormsg;
|
|
if ( MAGPIE_DEBUG ) {
|
|
trigger_error( $errormsg, $lvl);
|
|
}
|
|
else {
|
|
error_log( $errormsg, 0);
|
|
}
|
|
}
|
|
function debug ($debugmsg, $lvl=E_USER_NOTICE) {
|
|
if ( MAGPIE_DEBUG ) {
|
|
$this->error("MagpieRSS [debug] $debugmsg", $lvl);
|
|
}
|
|
}
|
|
}
|
|
|
|
function parse_w3cdtf ( $date_str ) {
|
|
|
|
# regex to match wc3dtf
|
|
$pat = "/(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(:(\d{2}))?(?:([-+])(\d{2}):?(\d{2})|(Z))?/";
|
|
|
|
if ( preg_match( $pat, $date_str, $match ) ) {
|
|
list( $year, $month, $day, $hours, $minutes, $seconds) =
|
|
array( $match[1], $match[2], $match[3], $match[4], $match[5], $match[6]);
|
|
|
|
# calc epoch for current date assuming GMT
|
|
$epoch = gmmktime( $hours, $minutes, $seconds, $month, $day, $year);
|
|
|
|
$offset = 0;
|
|
if ( $match[10] == 'Z' ) {
|
|
# zulu time, aka GMT
|
|
}
|
|
else {
|
|
list( $tz_mod, $tz_hour, $tz_min ) =
|
|
array( $match[8], $match[9], $match[10]);
|
|
|
|
# zero out the variables
|
|
if ( ! $tz_hour ) { $tz_hour = 0; }
|
|
if ( ! $tz_min ) { $tz_min = 0; }
|
|
|
|
$offset_secs = (($tz_hour*60)+$tz_min)*60;
|
|
|
|
# is timezone ahead of GMT? then subtract offset
|
|
#
|
|
if ( $tz_mod == '+' ) {
|
|
$offset_secs = $offset_secs * -1;
|
|
}
|
|
|
|
$offset = $offset_secs;
|
|
}
|
|
$epoch = $epoch + $offset;
|
|
return $epoch;
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
function wp_rss ($url, $num) {
|
|
//ini_set("display_errors", false); uncomment to suppress php errors thrown if the feed is not returned.
|
|
$num_items = $num;
|
|
$rss = fetch_rss($url);
|
|
if ( $rss ) {
|
|
echo "<ul>";
|
|
$rss->items = array_slice($rss->items, 0, $num_items);
|
|
foreach ($rss->items as $item ) {
|
|
echo "<li>\n";
|
|
echo "<a href='$item[link]' title='$item[description]'>";
|
|
echo htmlentities($item['title']);
|
|
echo "</a><br />\n";
|
|
echo "</li>\n";
|
|
}
|
|
echo "</ul>";
|
|
}
|
|
else {
|
|
echo "an error has occured the feed is probably down, try again later.";
|
|
}
|
|
}
|
|
|
|
function get_rss ($uri, $num = 5) { // Like get posts, but for RSS
|
|
$rss = fetch_rss($url);
|
|
if ( $rss ) {
|
|
$rss->items = array_slice($rss->items, 0, $num_items);
|
|
foreach ($rss->items as $item ) {
|
|
echo "<li>\n";
|
|
echo "<a href='$item[link]' title='$item[description]'>";
|
|
echo htmlentities($item['title']);
|
|
echo "</a><br />\n";
|
|
echo "</li>\n";
|
|
}
|
|
return $posts;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
?>
|