| <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
|
| /**
|
| * CodeIgniter
|
| *
|
| * An open source application development framework for PHP 4.3.2 or newer
|
| *
|
| * @package CodeIgniter
|
| * @author ExpressionEngine Dev Team
|
| * @copyright Copyright (c) 2006, EllisLab, Inc.
|
| * @license http://codeigniter.com/user_guide/license.html
|
| * @link http://codeigniter.com
|
| * @since Version 1.0
|
| * @filesource
|
| */
|
|
|
| // ------------------------------------------------------------------------
|
|
|
| /**
|
| * Trackback Class
|
| *
|
| * Trackback Sending/Receiving Class
|
| *
|
| * @package CodeIgniter
|
| * @subpackage Libraries
|
| * @category Trackbacks
|
| * @author ExpressionEngine Dev Team
|
| * @link http://codeigniter.com/user_guide/libraries/trackback.html
|
| */
|
| class CI_Trackback {
|
|
|
| var $time_format = 'local';
|
| var $charset = 'UTF-8';
|
| var $data = array('url' => '', 'title' => '', 'excerpt' => '', 'blog_name' => '', 'charset' => '');
|
| var $convert_ascii = TRUE;
|
| var $response = '';
|
| var $error_msg = array();
|
|
|
| /**
|
| * Constructor
|
| *
|
| * @access public
|
| */
|
| function CI_Trackback()
|
| {
|
| log_message('debug', "Trackback Class Initialized");
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Send Trackback
|
| *
|
| * @access public
|
| * @param array
|
| * @return bool
|
| */
|
| function send($tb_data)
|
| {
|
| if (! is_array($tb_data))
|
| {
|
| $this->set_error('The send() method must be passed an array');
|
| return FALSE;
|
| }
|
|
|
| // Pre-process the Trackback Data
|
| foreach (array('url', 'title', 'excerpt', 'blog_name', 'ping_url') as $item)
|
| {
|
| if (! isset($tb_data[$item]))
|
| {
|
| $this->set_error('Required item missing: '.$item);
|
| return FALSE;
|
| }
|
|
|
| switch ($item)
|
| {
|
| case 'ping_url' : $$item = $this->extract_urls($tb_data[$item]);
|
| break;
|
| case 'excerpt' : $$item = $this->limit_characters($this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
|
| break;
|
| case 'url' : $$item = str_replace('-', '-', $this->convert_xml(strip_tags(stripslashes($tb_data[$item]))));
|
| break;
|
| default : $$item = $this->convert_xml(strip_tags(stripslashes($tb_data[$item])));
|
| break;
|
| }
|
|
|
| // Convert High ASCII Characters
|
| if ($this->convert_ascii == TRUE)
|
| {
|
| if ($item == 'excerpt')
|
| {
|
| $$item = $this->convert_ascii($$item);
|
| }
|
| elseif ($item == 'title')
|
| {
|
| $$item = $this->convert_ascii($$item);
|
| }
|
| elseif($item == 'blog_name')
|
| {
|
| $$item = $this->convert_ascii($$item);
|
| }
|
| }
|
| }
|
|
|
| // Build the Trackback data string
|
| $charset = (! isset($tb_data['charset'])) ? $this->charset : $tb_data['charset'];
|
|
|
| $data = "url=".rawurlencode($url)."&title=".rawurlencode($title)."&blog_name=".rawurlencode($blog_name)."&excerpt=".rawurlencode($excerpt)."&charset=".rawurlencode($charset);
|
|
|
| // Send Trackback(s)
|
| $return = TRUE;
|
| if (count($ping_url) > 0)
|
| {
|
| foreach ($ping_url as $url)
|
| {
|
| if ($this->process($url, $data) == FALSE)
|
| {
|
| $return = FALSE;
|
| }
|
| }
|
| }
|
|
|
| return $return;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Receive Trackback Data
|
| *
|
| * This function simply validates the incoming TB data.
|
| * It returns false on failure and true on success.
|
| * If the data is valid it is set to the $this->data array
|
| * so that it can be inserted into a database.
|
| *
|
| * @access public
|
| * @return bool
|
| */
|
| function receive()
|
| {
|
| foreach (array('url', 'title', 'blog_name', 'excerpt') as $val)
|
| {
|
| if (! isset($_POST[$val]) OR $_POST[$val] == '')
|
| {
|
| $this->set_error('The following required POST variable is missing: '.$val);
|
| return FALSE;
|
| }
|
|
|
| $this->data['charset'] = (! isset($_POST['charset'])) ? 'auto' : strtoupper(trim($_POST['charset']));
|
|
|
| if ($val != 'url' && function_exists('mb_convert_encoding'))
|
| {
|
| $_POST[$val] = mb_convert_encoding($_POST[$val], $this->charset, $this->data['charset']);
|
| }
|
|
|
| $_POST[$val] = ($val != 'url') ? $this->convert_xml(strip_tags($_POST[$val])) : strip_tags($_POST[$val]);
|
|
|
| if ($val == 'excerpt')
|
| {
|
| $_POST['excerpt'] = $this->limit_characters($_POST['excerpt']);
|
| }
|
|
|
| $this->data[$val] = $_POST[$val];
|
| }
|
|
|
| return TRUE;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Send Trackback Error Message
|
| *
|
| * Allows custom errors to be set. By default it
|
| * sends the "incomplete information" error, as that's
|
| * the most common one.
|
| *
|
| * @access public
|
| * @param string
|
| * @return void
|
| */
|
| function send_error($message = 'Incomplete Information')
|
| {
|
| echo "<?xml version=\"1.0\" encoding=\"utf-8\"?".">\n<response>\n<error>1</error>\n<message>".$message."</message>\n</response>";
|
| exit;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Send Trackback Success Message
|
| *
|
| * This should be called when a trackback has been
|
| * successfully received and inserted.
|
| *
|
| * @access public
|
| * @return void
|
| */
|
| function send_success()
|
| {
|
| echo "<?xml version=\"1.0\" encoding=\"utf-8\"?".">\n<response>\n<error>0</error>\n</response>";
|
| exit;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Fetch a particular item
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function data($item)
|
| {
|
| return (! isset($this->data[$item])) ? '' : $this->data[$item];
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Process Trackback
|
| *
|
| * Opens a socket connection and passes the data to
|
| * the server. Returns true on success, false on failure
|
| *
|
| * @access public
|
| * @param string
|
| * @param string
|
| * @return bool
|
| */
|
| function process($url, $data)
|
| {
|
| $target = parse_url($url);
|
|
|
| // Open the socket
|
| if (! $fp = @fsockopen($target['host'], 80))
|
| {
|
| $this->set_error('Invalid Connection: '.$url);
|
| return FALSE;
|
| }
|
|
|
| // Build the path
|
| $ppath = (! isset($target['path'])) ? $url : $target['path'];
|
|
|
| $path = (isset($target['query']) && $target['query'] != "") ? $ppath.'?'.$target['query'] : $ppath;
|
|
|
| // Add the Trackback ID to the data string
|
| if ($id = $this->get_id($url))
|
| {
|
| $data = "tb_id=".$id."&".$data;
|
| }
|
|
|
| // Transfer the data
|
| fputs ($fp, "POST " . $path . " HTTP/1.0\r\n" );
|
| fputs ($fp, "Host: " . $target['host'] . "\r\n" );
|
| fputs ($fp, "Content-type: application/x-www-form-urlencoded\r\n" );
|
| fputs ($fp, "Content-length: " . strlen($data) . "\r\n" );
|
| fputs ($fp, "Connection: close\r\n\r\n" );
|
| fputs ($fp, $data);
|
|
|
| // Was it successful?
|
| $this->response = "";
|
|
|
| while(!feof($fp))
|
| {
|
| $this->response .= fgets($fp, 128);
|
| }
|
| @fclose($fp);
|
|
|
| if (! eregi("<error>0</error>", $this->response))
|
| {
|
| $message = 'An unknown error was encountered';
|
|
|
| if (preg_match("/<message>(.*?)<\/message>/is", $this->response, $match))
|
| {
|
| $message = trim($match['1']);
|
| }
|
|
|
| $this->set_error($message);
|
| return FALSE;
|
| }
|
|
|
| return TRUE;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Extract Trackback URLs
|
| *
|
| * This function lets multiple trackbacks be sent.
|
| * It takes a string of URLs (separated by comma or
|
| * space) and puts each URL into an array
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function extract_urls($urls)
|
| {
|
| // Remove the pesky white space and replace with a comma.
|
| $urls = preg_replace("/\s*(\S+)\s*/", "\\1,", $urls);
|
|
|
| // If they use commas get rid of the doubles.
|
| $urls = str_replace(",,", ",", $urls);
|
|
|
| // Remove any comma that might be at the end
|
| if (substr($urls, -1) == ",")
|
| {
|
| $urls = substr($urls, 0, -1);
|
| }
|
|
|
| // Break into an array via commas
|
| $urls = preg_split('/[,]/', $urls);
|
|
|
| // Removes duplicates
|
| $urls = array_unique($urls);
|
|
|
| array_walk($urls, array($this, 'validate_url'));
|
|
|
| return $urls;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Validate URL
|
| *
|
| * Simply adds "http://" if missing
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function validate_url($url)
|
| {
|
| $url = trim($url);
|
|
|
| if (substr($url, 0, 4) != "http")
|
| {
|
| $url = "http://".$url;
|
| }
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Find the Trackback URL's ID
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function get_id($url)
|
| {
|
| $tb_id = "";
|
|
|
| if (strstr($url, '?'))
|
| {
|
| $tb_array = explode('/', $url);
|
| $tb_end = $tb_array[count($tb_array)-1];
|
|
|
| if (! is_numeric($tb_end))
|
| {
|
| $tb_end = $tb_array[count($tb_array)-2];
|
| }
|
|
|
| $tb_array = explode('=', $tb_end);
|
| $tb_id = $tb_array[count($tb_array)-1];
|
| }
|
| else
|
| {
|
| if (ereg("/$", $url))
|
| {
|
| $url = substr($url, 0, -1);
|
| }
|
|
|
| $tb_array = explode('/', $url);
|
| $tb_id = $tb_array[count($tb_array)-1];
|
|
|
| if (! is_numeric($tb_id))
|
| {
|
| $tb_id = $tb_array[count($tb_array)-2];
|
| }
|
| }
|
|
|
| if (! preg_match ("/^([0-9]+)$/", $tb_id))
|
| {
|
| return false;
|
| }
|
| else
|
| {
|
| return $tb_id;
|
| }
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Convert Reserved XML characters to Entities
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function convert_xml($str)
|
| {
|
| $temp = '__TEMP_AMPERSANDS__';
|
|
|
| $str = preg_replace("/&#(\d+);/", "$temp\\1;", $str);
|
| $str = preg_replace("/&(\w+);/", "$temp\\1;", $str);
|
|
|
| $str = str_replace(array("&","<",">","\"", "'", "-"),
|
| array("&", "<", ">", """, "'", "-"),
|
| $str);
|
|
|
| $str = preg_replace("/$temp(\d+);/","&#\\1;",$str);
|
| $str = preg_replace("/$temp(\w+);/","&\\1;", $str);
|
|
|
| return $str;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Character limiter
|
| *
|
| * Limits the string based on the character count. Will preserve complete words.
|
| *
|
| * @access public
|
| * @param string
|
| * @param integer
|
| * @param string
|
| * @return string
|
| */
|
| function limit_characters($str, $n = 500, $end_char = '…')
|
| {
|
| if (strlen($str) < $n)
|
| {
|
| return $str;
|
| }
|
|
|
| $str = preg_replace("/\s+/", ' ', preg_replace("/(\r\n|\r|\n)/", " ", $str));
|
|
|
| if (strlen($str) <= $n)
|
| {
|
| return $str;
|
| }
|
|
|
| $out = "";
|
| foreach (explode(' ', trim($str)) as $val)
|
| {
|
| $out .= $val.' ';
|
| if (strlen($out) >= $n)
|
| {
|
| return trim($out).$end_char;
|
| }
|
| }
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * High ASCII to Entities
|
| *
|
| * Converts Hight ascii text and MS Word special chars
|
| * to character entities
|
| *
|
| * @access public
|
| * @param string
|
| * @return string
|
| */
|
| function convert_ascii($str)
|
| {
|
| $count = 1;
|
| $out = '';
|
| $temp = array();
|
|
|
| for ($i = 0, $s = strlen($str); $i < $s; $i++)
|
| {
|
| $ordinal = ord($str[$i]);
|
|
|
| if ($ordinal < 128)
|
| {
|
| $out .= $str[$i];
|
| }
|
| else
|
| {
|
| if (count($temp) == 0)
|
| {
|
| $count = ($ordinal < 224) ? 2 : 3;
|
| }
|
|
|
| $temp[] = $ordinal;
|
|
|
| if (count($temp) == $count)
|
| {
|
| $number = ($count == 3) ? (($temp['0'] % 16) * 4096) + (($temp['1'] % 64) * 64) + ($temp['2'] % 64) : (($temp['0'] % 32) * 64) + ($temp['1'] % 64);
|
|
|
| $out .= '&#'.$number.';';
|
| $count = 1;
|
| $temp = array();
|
| }
|
| }
|
| }
|
|
|
| return $out;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Set error message
|
| *
|
| * @access public
|
| * @param string
|
| * @return void
|
| */
|
| function set_error($msg)
|
| {
|
| log_message('error', $msg);
|
| $this->error_msg[] = $msg;
|
| }
|
|
|
| // --------------------------------------------------------------------
|
|
|
| /**
|
| * Show error messages
|
| *
|
| * @access public
|
| * @param string
|
| * @param string
|
| * @return string
|
| */
|
| function display_errors($open = '<p>', $close = '</p>')
|
| {
|
| $str = '';
|
| foreach ($this->error_msg as $val)
|
| {
|
| $str .= $open.$val.$close;
|
| }
|
|
|
| return $str;
|
| }
|
|
|
| }
|
| // END Trackback Class
|
| |
| /* End of file Trackback.php */ |
| /* Location: ./system/libraries/Trackback.php */ |