plugins/af_unburn/init.php

   1 <?php
   2 class Af_Unburn extends Plugin {
   3         private $host;
   4
   5         function about() {
   6                 return array(1.0,
   7                         "Resolves feedburner and similar feed redirector URLs (requires CURL)",
   8                         "fox");
   9         }
  10
  11         function init($host) {
  12                 $this->host = $host;
  13
  14                 $host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
  15         }
  16
  17         function hook_article_filter($article) {
  18                 $owner_uid = $article["owner_uid"];
  19
  20                 if (defined('NO_CURL') || !function_exists("curl_init") || ini_get("open_basedir"))
  21                         return $article;
  22
  23                 if ((strpos($article["link"], "feedproxy.google.com") !== FALSE ||
  24                                 strpos($article["link"], "/~r/") !== FALSE ||
  25                                 strpos($article["link"], "feedsportal.com") !== FALSE)) {
  26
  27                                 $ch = curl_init($article["link"]);
  28
  29                                 curl_setopt($ch, CURLOPT_TIMEOUT, 5);
  30                                 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  31                                 curl_setopt($ch, CURLOPT_HEADER, true);
  32                                 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
  33                                 curl_setopt($ch, CURLOPT_USERAGENT, SELF_USER_AGENT);
  34
  35                                 if (defined('_CURL_HTTP_PROXY')) {
  36                                         curl_setopt($ch, CURLOPT_PROXY, _CURL_HTTP_PROXY);
  37                                 }
  38
  39                                 @curl_exec($ch);
  40
  41                                 $real_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
  42
  43                                 curl_close($ch);
  44
  45                                 if ($real_url) {
  46                                         /* remove the rest of it */
  47
  48                                         $query = parse_url($real_url, PHP_URL_QUERY);
  49
  50                                         if ($query && strpos($query, "utm_source") !== FALSE) {
  51                                                 $args = array();
  52                                                 parse_str($query, $args);
  53
  54                                                 foreach (array("utm_source", "utm_medium", "utm_campaign") as $param) {
  55                                                         if (isset($args[$param])) unset($args[$param]);
  56                                                 }
  57
  58                                                 $new_query = http_build_query($args);
  59
  60                                                 if ($new_query != $query) {
  61                                                         $real_url = str_replace("?$query", "?$new_query", $real_url);
  62                                                 }
  63                                         }
  64
  65                                         $real_url = preg_replace("/\?$/", "", $real_url);
  66
  67                                         $article["plugin_data"] = "unburn,$owner_uid:" . $article["plugin_data"];
  68                                         $article["link"] = $real_url;
  69                                 }
  70                 }
  71
  72                 return $article;
  73         }
  74
  75         function api_version() {
  76                 return 2;
  77         }
  78
  79 }
  80 ?>