plugins/af_zz_imgproxy/init.php

   1 <?php
   2 class Af_Zz_ImgProxy extends Plugin {
   3         private $host;
   4
   5         function about() {
   6                 return array(1.0,
   7                         "Load insecure images via built-in proxy",
   8                         "fox");
   9         }
  10
  11         function init($host) {
  12                 $this->host = $host;
  13
  14                 $host->add_hook($host::HOOK_RENDER_ARTICLE, $this);
  15                 $host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this);
  16                 $host->add_hook($host::HOOK_RENDER_ARTICLE_API, $this);
  17
  18                 $host->add_hook($host::HOOK_PREFS_TAB, $this);
  19         }
  20
  21         function hook_render_article($article) {
  22                 return $this->hook_render_article_cdm($article);
  23         }
  24
  25         function hook_render_article_api($headline) {
  26                 return $this->hook_render_article_cdm($headline["headline"], true);
  27         }
  28
  29         public function imgproxy() {
  30                 $url = rewrite_relative_url(SELF_URL_PATH, $_REQUEST["url"]);
  31                 $kind = (int) $_REQUEST["kind"]; // 1 = video
  32
  33                 $extension = $kind == 1 ? '.mp4' : '.png';
  34                 $local_filename = CACHE_DIR . "/images/" . sha1($url) . $extension;
  35
  36                 if ($_REQUEST["debug"] == "1") { print $url . "\n" . $local_filename; die; }
  37
  38                 header("Content-Disposition: inline; filename=\"".basename($local_filename)."\"");
  39
  40                 if (file_exists($local_filename)) {
  41                         $mimetype = mime_content_type($local_filename);
  42                         header("Content-type: $mimetype");
  43
  44                         $stamp = gmdate("D, d M Y H:i:s", filemtime($local_filename)). " GMT";
  45                         header("Last-Modified: $stamp", true);
  46
  47                         readfile($local_filename);
  48                 } else {
  49                         $data = fetch_file_contents(array("url" => $url));
  50
  51                         global $fetch_last_error;
  52                         print $fetch_last_error;
  53
  54                         if ($data) {
  55                                 if (file_put_contents($local_filename, $data)) {
  56                                         $mimetype = mime_content_type($local_filename);
  57                                         header("Content-type: $mimetype");
  58                                 }
  59
  60                                 print $data;
  61                         }
  62                 }
  63         }
  64
  65         function rewrite_url_if_needed($url, $kind, $all_remote = false) {
  66                 $scheme = parse_url($url, PHP_URL_SCHEME);
  67
  68                 if ($all_remote) {
  69                         $host = parse_url($url, PHP_URL_HOST);
  70                         $self_host = parse_url(SELF_URL_PATH, PHP_URL_HOST);
  71
  72                         $is_remote = $host != $self_host;
  73                 } else {
  74                         $is_remote = false;
  75                 }
  76
  77                 if (($scheme != 'https' && $scheme != "") || $is_remote) {
  78                         if (strpos($url, "data:") !== 0) {
  79                                 $url = "backend.php?op=pluginhandler&plugin=af_zz_imgproxy&method=imgproxy&kind=$kind&url=" .
  80                                         urlencode($url);
  81                         }
  82                 }
  83
  84                 return $url;
  85         }
  86
  87         function hook_render_article_cdm($article, $api_mode = false) {
  88
  89                 $need_saving = false;
  90                 $proxy_all = $this->host->get($this, "proxy_all");
  91
  92                 $doc = new DOMDocument();
  93                 if (@$doc->loadHTML($article["content"])) {
  94                         $xpath = new DOMXPath($doc);
  95                         $imgs = $xpath->query("//img[@src]");
  96
  97                         foreach ($imgs as $img) {
  98                                 $new_src = $this->rewrite_url_if_needed($img->getAttribute("src"), 0, $proxy_all);
  99
 100                                 if ($new_src != $img->getAttribute("src")) {
 101                                         $img->setAttribute("src", $new_src);
 102
 103                                         $need_saving = true;
 104                                 }
 105                         }
 106
 107                         $vids = $xpath->query("//video");
 108
 109                         foreach ($vids as $vid) {
 110                                 if ($vid->hasAttribute("poster")) {
 111                                         $new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"), 0, $proxy_all);
 112
 113                                         if ($new_src != $vid->getAttribute("poster")) {
 114                                                 $vid->setAttribute("poster", $new_src);
 115
 116                                                 $need_saving = true;
 117                                         }
 118                                 }
 119
 120                                 $vsrcs = $xpath->query("source", $vid);
 121
 122                                 foreach ($vsrcs as $vsrc) {
 123                                         $new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), 1, $proxy_all);
 124
 125                                         if ($new_src != $vsrc->getAttribute("src")) {
 126                                                 $vid->setAttribute("src", $new_src);
 127
 128                                                 $need_saving = true;
 129                                         }
 130                                 }
 131                         }
 132                 }
 133
 134                 if ($need_saving) $article["content"] = $doc->saveXML();
 135
 136                 return $article;
 137         }
 138
 139         function hook_prefs_tab($args) {
 140                 if ($args != "prefFeeds") return;
 141
 142                 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Image proxy settings (af_zz_imgproxy)')."\">";
 143
 144                 print "<form dojoType=\"dijit.form.Form\">";
 145
 146                 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
 147                         evt.preventDefault();
 148                         if (this.validate()) {
 149                                 console.log(dojo.objectToQuery(this.getValues()));
 150                                 new Ajax.Request('backend.php', {
 151                                         parameters: dojo.objectToQuery(this.getValues()),
 152                                         onComplete: function(transport) {
 153                                                 notify_info(transport.responseText);
 154                                         }
 155                                 });
 156                                 //this.reset();
 157                         }
 158                         </script>";
 159
 160                 print_hidden("op", "pluginhandler");
 161                 print_hidden("method", "save");
 162                 print_hidden("plugin", "af_zz_imgproxy");
 163
 164                 $proxy_all = $this->host->get($this, "proxy_all");
 165                 print_checkbox("proxy_all", $proxy_all);
 166
 167                 print "&nbsp;<label for=\"proxy_all\">" . __("Enable proxy for all remote images.") . "</label>";
 168
 169                 print "<p>"; print_button("submit", __("Save"));
 170
 171                 print "</form>";
 172
 173                 print "</div>";
 174         }
 175
 176         function save() {
 177                 $proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]) == "true";
 178
 179                 $this->host->set($this, "proxy_all", $proxy_all);
 180
 181                 echo __("Configuration saved");
 182         }
 183
 184         function api_version() {
 185                 return 2;
 186         }
 187 }