--- /dev/null
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package CodeIgniter
+ * @author ExpressionEngine Dev Team
+ * @copyright Copyright (c) 2008 - 2011, 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 $error_msg = array();
+
+ /**
+ * Constructor
+ *
+ * @access public
+ */
+ public function __construct()
+ {
+ log_message('debug', "Trackback Class Initialized");
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Send Trackback
+ *
+ * @access public
+ * @param array
+ * @return bool
+ */
+ function send($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($fp);
+
+
+ if (stristr($this->response, '<error>0</error>') === FALSE)
+ {
+ $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)
+ {
+ $tb_id = "";
+
+ if (strpos($url, '?') !== FALSE)
+ {
+ $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
+ {
+ $url = rtrim($url, '/');
+
+ $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+/", ' ', str_replace(array("\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 */
\ No newline at end of file
projects / living-lab-site.git / blobdiff