| <?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 | |
| ?> |