privacy_image_cache: A file cache is implemented that should be much faster than...

[friendica-addons.git] / privacy_image_cache / privacy_image_cache.php

diff --git a/privacy_image_cache/privacy_image_cache.php b/privacy_image_cache/privacy_image_cache.php
index b7236d09d0bb249abd31598976412650ea77074f..f0d8e39ac55b24b2a5d4b31a1900d61911cc2bcc 100644 (file)
--- a/privacy_image_cache/privacy_image_cache.php
+++ b/privacy_image_cache/privacy_image_cache.php
@@ -11,7 +11,8 @@ define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day
 require_once('include/security.php');
 
 function privacy_image_cache_install() {
-    register_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
+    register_hook('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook');
+ //   register_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
     register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
     register_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
     register_hook('cron',         'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
@@ -19,6 +20,7 @@ function privacy_image_cache_install() {
 
 
 function privacy_image_cache_uninstall() {
+    unregister_hook('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook');
     unregister_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
     unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
     unregister_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
@@ -30,6 +32,8 @@ function privacy_image_cache_module() {}
 
 
 function privacy_image_cache_init() {
+       global $a;
+
        if(function_exists('header_remove')) {
                header_remove('Pragma');
                header_remove('pragma');
@@ -39,6 +43,24 @@ function privacy_image_cache_init() {
        // Double encoded url - happens with Diaspora
        $urlhash2 = 'pic:' . sha1(urldecode($_REQUEST['url']));
 
+       $cache = get_config('system','itemcache');
+       if (($cache != '') and is_dir($cache)) {
+               $cachefile = $cache."/".hash("md5", $urlhash);
+               if (file_exists($cachefile)) {
+                       $img_str = file_get_contents($cachefile);
+
+                       $mime = image_type_to_mime_type(exif_imagetype($cachefile));
+
+                       header("Content-type: $mime");
+                       header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
+                       header("Cache-Control: max-age=" . (3600*24));
+
+                       echo $img_str;
+
+                       killme();
+               }
+       }
+
        $r = q("SELECT * FROM `photo` WHERE `resource-id` in ('%s', '%s') LIMIT 1", $urlhash, $urlhash2);
        if (count($r)) {
                $img_str = $r[0]['data'];
@@ -47,9 +69,22 @@ function privacy_image_cache_init() {
        } else {
                require_once("Photo.php");
 
+               // It shouldn't happen but it does - spaces in URL
+               $_REQUEST['url'] = str_replace(" ", "+", $_REQUEST['url']);
+
                $img_str = fetch_url($_REQUEST['url'],true);
-               if (substr($img_str, 0, 6) == "GIF89a") {
-                       $mime = "image/gif";
+
+               $tempfile = tempnam("", "cache");
+               file_put_contents($tempfile, $img_str);
+               $mime = image_type_to_mime_type(exif_imagetype($tempfile));
+               unlink($tempfile);
+
+               // If there is an error then return a blank image
+               if ((substr($a->get_curl_code(), 0, 1) == "4") or (!$img_str)) {
+                       $img_str = file_get_contents("images/blank.png");
+                       $mime = "image/png";
+               //} else if (substr($img_str, 0, 6) == "GIF89a") {
+               } else if ($mime != "image/jpeg") {
                        $image = @imagecreatefromstring($img_str);
 
                        if($image === FALSE) die();
@@ -64,7 +99,7 @@ function privacy_image_cache_init() {
                                dbesc(''),
                                intval(imagesy($image)),
                                intval(imagesx($image)),
-                               'image/gif',
+                               $mime,
                                dbesc($img_str),
                                100,
                                intval(0),
@@ -81,6 +116,9 @@ function privacy_image_cache_init() {
                }
        }
 
+       // Writing in cachefile
+       if (isset($cachefile) && $cachefile != '')
+               file_put_contents($cachefile, $img_str);
 
        header("Content-type: $mime");
        header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
@@ -111,16 +149,27 @@ function privacy_image_cache_is_local_image($url) {
  */
 function privacy_image_cache_img_cb($matches) {
        // following line changed per bug #431
-    if (privacy_image_cache_is_local_image($matches[2])) return $matches[1] . $matches[2] . $matches[3];
-    return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($matches[2]))) . $matches[3];
+       if (privacy_image_cache_is_local_image($matches[2]))
+               return $matches[1] . $matches[2] . $matches[3];
+
+       return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . addslashes(rawurlencode(htmlspecialchars_decode($matches[2]))) . $matches[3];
+}
+
+/**
+ * @param App $a
+ * @param string $o
+ */
+function privacy_image_cache_prepare_body_hook(&$a, &$o) {
+       $o["html"] = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o["html"]);
 }
 
 /**
  * @param App $a
  * @param string $o
+ * Function disabled because the plugin moved
  */
 function privacy_image_cache_bbcode_hook(&$a, &$o) {
-    $o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
+       //$o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
 }