174 lines
4.9 KiB
PHP
174 lines
4.9 KiB
PHP
<?php
|
|
// Links weblogs.com grabber
|
|
// Copyright (C) 2003 Mike Little -- mike@zed1.com
|
|
|
|
// Get the path of our parent directory:
|
|
$parentpath = dirname(dirname(__FILE__));
|
|
|
|
require_once($parentpath.'/wp-config.php');
|
|
|
|
// globals to hold state
|
|
$updated_timestamp = 0;
|
|
$all_links = array();
|
|
|
|
/**
|
|
** preload_links()
|
|
** Pre-load the visible, non-blank, links into an associative array $all_links
|
|
** key is url, value is array of link_id and update_time
|
|
** Note: update time is initialised to 0. That way we only have to update (in
|
|
** the db) the ones which have been updated (on weblogs.com).
|
|
**/
|
|
function preload_links() {
|
|
global $tablelinks, $all_links, $wpdb;
|
|
$links = $wpdb->get_results("SELECT link_id, link_url FROM $tablelinks WHERE link_visible = 'Y' AND link_url <> ''");
|
|
foreach ($links as $link) {
|
|
$link_url = transform_url($link->link_url);
|
|
$all_links[$link_url] = array($link->link_id, 0);
|
|
}
|
|
}
|
|
|
|
/**
|
|
** update_links()
|
|
** Update in the db the links which have been updated ($all_links[url][1] != 0)
|
|
**/
|
|
function update_links() {
|
|
global $tablelinks, $all_links, $wpdb;
|
|
reset($all_links);
|
|
while (list($id, $val) = each($all_links)) {
|
|
if ($val[1]) {
|
|
$wpdb->query("UPDATE $tablelinks SET link_updated = '$val[1]' WHERE link_id = $val[0]");
|
|
}
|
|
} // end while
|
|
}
|
|
|
|
/**
|
|
** get_weblogs_updatedfile()
|
|
** Retrieves and caches a copy of the weblogs.com changed blogs xml file.
|
|
** If the file exists check it's age, get new copy if old.
|
|
** If a new or updated file has been written return true (needs processing)
|
|
** otherwise return false (nothing to do)
|
|
**/
|
|
function get_weblogs_updatedfile() {
|
|
global $ignore_weblogs_cache;
|
|
$update = false;
|
|
$file = ABSPATH . 'wp-content/links-update-cache.xml';
|
|
if ($ignore_weblogs_cache) {
|
|
$update = true;
|
|
} else {
|
|
if (file_exists($file)) {
|
|
// is it old?
|
|
$modtime = filemtime($file);
|
|
if ((time() - $modtime) > (get_settings('weblogs_cacheminutes') * 60)) {
|
|
$update = true;
|
|
}
|
|
} else { // doesn't exist
|
|
$update = true;
|
|
}
|
|
}
|
|
|
|
if ($update) {
|
|
// get a new copy
|
|
$a = @file(get_settings('weblogs_xml_url'));
|
|
if ($a != false && count($a) && $a[0]) {
|
|
$contents = implode('', $a);
|
|
|
|
// Clean up the input, because weblogs.com doesn't output clean XML
|
|
$contents = preg_replace("/'/",''',$contents);
|
|
$contents = preg_replace('|[^[:space:][:punct:][:alpha:][:digit:]]|','',$contents);
|
|
|
|
$cachefp = fopen(ABSPATH . 'wp-content/links-update-cache.xml', "w");
|
|
fwrite($cachefp, $contents);
|
|
fclose($cachefp);
|
|
} else {
|
|
return false; //don't try to process
|
|
}
|
|
}
|
|
return $update;
|
|
}
|
|
|
|
/**
|
|
** startElement()
|
|
** Callback function. Called at the start of a new xml tag.
|
|
**/
|
|
function startElement($parser, $tagName, $attrs) {
|
|
global $updated_timestamp, $all_links;
|
|
if ($tagName == 'WEBLOGUPDATES') {
|
|
//convert 'updated' into php date variable
|
|
$updated_timestamp = strtotime($attrs['UPDATED']);
|
|
//echo('got timestamp of ' . gmdate('F j, Y, H:i:s', $updated_timestamp) . "\n");
|
|
} else if ($tagName == 'WEBLOG') {
|
|
// is this url in our links?
|
|
$link_url = transform_url($attrs['URL']);
|
|
if (isset($all_links[$link_url])) {
|
|
$all_links[$link_url][1] = date('YmdHis', $updated_timestamp - $attrs['WHEN']);
|
|
//echo('set link id ' . $all_links[$link_url][0] . ' to date ' . $all_links[$link_url][1] . "\n");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
** endElement()
|
|
** Callback function. Called at the end of an xml tag.
|
|
**/
|
|
function endElement($parser, $tagName) {
|
|
// nothing to do.
|
|
}
|
|
|
|
/**
|
|
** transform_url()
|
|
** Transforms a url to a minimal identifier.
|
|
**
|
|
** Remove www, remove index.* or default.*, remove
|
|
** trailing slash
|
|
**/
|
|
function transform_url($url) {
|
|
//echo("transform_url(): $url ");
|
|
$url = str_replace('www.', '', $url);
|
|
$url = str_replace('WWW.', '', $url);
|
|
$url = preg_replace('/(?:index|default)\.[a-z]{2,}/i', '', $url);
|
|
if (substr($url, -1, 1) == '/') {
|
|
$url = substr($url, 0, -1);
|
|
}
|
|
//echo(" now equals $url\n");
|
|
return $url;
|
|
} // end transform_url
|
|
|
|
// get/update the cache file.
|
|
// true return means new copy
|
|
if (get_weblogs_updatedfile()) {
|
|
//echo('<pre>');
|
|
// pre-load the links
|
|
preload_links();
|
|
|
|
// Create an XML parser
|
|
$xml_parser = xml_parser_create();
|
|
|
|
// Set the functions to handle opening and closing tags
|
|
xml_set_element_handler($xml_parser, "startElement", "endElement");
|
|
|
|
// Open the XML file for reading
|
|
$fp = fopen(ABSPATH . 'wp-content/links-update-cache.xml', "r")
|
|
or die("Error reading XML data.");
|
|
|
|
// Read the XML file 16KB at a time
|
|
while ($data = fread($fp, 16384)) {
|
|
// Parse each 4KB chunk with the XML parser created above
|
|
xml_parse($xml_parser, $data, feof($fp))
|
|
or die(sprintf("XML error: %s at line %d",
|
|
xml_error_string(xml_get_error_code($xml_parser)),
|
|
xml_get_current_line_number($xml_parser)));
|
|
}
|
|
|
|
// Close the XML file
|
|
fclose($fp);
|
|
|
|
// Free up memory used by the XML parser
|
|
xml_parser_free($xml_parser);
|
|
|
|
// now update the db with latest times
|
|
update_links();
|
|
|
|
//echo('</pre>');
|
|
} // end if updated cache file
|
|
|
|
?>
|