Merge 04dbede4c6 into 8ca3de8afa

Web/Models/Entities/Note.php

@@ -2,12 +2,48 @@
 namespace openvk\Web\Models\Entities;
 use HTMLPurifier_Config;
 use HTMLPurifier;
+use HTMLPurifier_Filter;
+
+class SecurityFilter extends HTMLPurifier_Filter
+{
+    public function preFilter($html, $config, $context)
+    {
+        $html = preg_replace_callback(
+            '/<img[^>]*src\s*=\s*["\']([^"\']*)["\'][^>]*>/i',
+            function ($matches) {
+                $originalSrc = $matches[1];
+                $src = $originalSrc;
+                if (!str_contains($src, "/image.php?url=")) {
+                    $src = '/image.php?url=' . base64_encode($originalSrc);
+                } else {
+                    if (!OPENVK_ROOT_CONF["openvk"]["preferences"]["imagesProxy"]["replaceInNotes"]) {
+                        $src = preg_replace_callback('/(.*)\/image\.php\?url=(.*)/i', function ($matches) {
+                            return base64_decode($matches[2]);
+                        }, $src);
+                    }
+                }
+                return str_replace($originalSrc, $src, $matches[0]);
+            },
+            $html
+        );
+
+        return preg_replace_callback(
+            '/<a[^>]*href\s*=\s*["\']([^"\']*)["\'][^>]*>/i',
+            function ($matches) {
+                $originalHref = $matches[1];
+                $encodedHref = '/away.php?to=' . urlencode($originalHref);
+                return str_replace($originalHref, $encodedHref, $matches[0]);
+            },
+            $html
+        );
+    }
+}
 
 class Note extends Postable
 {
     protected $tableName = "notes";
     
-    protected function renderHTML(): string
+    protected function renderHTML(?string $content = NULL): string
     {
         $config = HTMLPurifier_Config::createDefault();
         $config->set("Attr.AllowedClasses", []);
@@ -74,15 +110,18 @@ class Note extends Postable
         $config->set("Attr.AllowedClasses", [
             "underline",
         ]);
-    
-        $source = NULL;
-        if(is_null($this->getRecord())) {
-            if(isset($this->changes["source"]))
-                $source = $this->changes["source"];
-            else
-                throw new \LogicException("Can't render note without content set.");
-        } else {
-            $source = $this->getRecord()->source;
+        $config->set('Filter.Custom', [new SecurityFilter()]);
+
+        $source = $content;
+        if (!$source) {
+            if (is_null($this->getRecord())) {
+                if (isset($this->changes["source"]))
+                    $source = $this->changes["source"];
+                else
+                    throw new \LogicException("Can't render note without content set.");
+            } else {
+                $source = $this->getRecord()->source;
+            }
         }
         
         $purifier = new HTMLPurifier($config);
@@ -110,8 +149,8 @@ class Note extends Postable
             $this->setCached_Content($cached);
             $this->save();
         }
-        
-        return $cached;
+
+        return $this->renderHTML($cached);
     }
 
     function getSource(): string

Web/Presenters/ImagesProxyPresenter.php

@@ -0,0 +1,63 @@
+<?php declare(strict_types=1);
+
+namespace openvk\Web\Presenters;
+
+use openvk\Web\Models\Repositories\{Gifts, Users};
+use openvk\Web\Models\Entities\Notifications\GiftNotification;
+
+final class ImagesProxyPresenter extends OpenVKPresenter
+{
+    const CACHE_EXPIRATION = 1210000;
+
+    private function image(string $contentType, $contentSize, string $raw): void
+    {
+        header("Content-Type: $contentType");
+        header("Content-Size: $contentSize");
+        header("Cache-Control: public, max-age=" . self::CACHE_EXPIRATION);
+        header("X-Accel-Expires: " . self::CACHE_EXPIRATION);
+        exit($raw);
+    }
+
+    private function placeholder(): void
+    {
+        $placeholder = file_get_contents(__DIR__ . "/../static/img/oof.apng");
+        $this->image("image/png", strlen($placeholder), $placeholder);
+    }
+
+    public function renderIndex(): void
+    {
+        $this->assertUserLoggedIn();
+
+        $url = $this->requestParam("url");
+        if (OPENVK_ROOT_CONF["openvk"]["preferences"]["imagesProxy"]["settings"]["base64_decode_url"]) {
+            $url = base64_decode($url);
+        }
+
+        $url = OPENVK_ROOT_CONF["openvk"]["preferences"]["imagesProxy"]["settings"]["url_prefix"] . $url;
+        if (!$url || !filter_var($url, FILTER_VALIDATE_URL)) {
+            $this->placeholder();
+        }
+
+        $ch = curl_init($url);
+        curl_setopt_array($ch, [
+            CURLOPT_HEADER => 0,
+            CURLOPT_URL => $url,
+            CURLOPT_USERAGENT => OPENVK_ROOT_CONF["openvk"]["appearance"]["name"] . ' Images Proxy/1.0',
+            CURLOPT_REFERER => "https://$_SERVER[SERVER_NAME]/",
+            CURLOPT_RETURNTRANSFER => 1,
+            CURLOPT_BINARYTRANSFER => 1,
+        ]);
+
+        $raw = curl_exec($ch);
+        $contentType = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
+        $contentSize = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
+
+        curl_close($ch);
+
+        if ($raw && str_contains($contentType, "image")) {
+            $this->image($contentType, $contentSize, $raw);
+        } else {
+            $this->placeholder();
+        }
+    }
+}

Web/di.yml

@@ -49,3 +49,4 @@ services:
     - openvk\Web\Models\Repositories\BannedLinks
     - openvk\Web\Models\Repositories\ChandlerGroups
     - openvk\Web\Presenters\MaintenancePresenter
+    - openvk\Web\Presenters\ImagesProxyPresenter

Web/routes.yml

@@ -349,6 +349,8 @@ routes:
       handler: "About->dev"
     - url: "/tour"
       handler: "About->tour"
+    - url: "/image.php"
+      handler: "ImagesProxy->index"
     - url: "/{?shortCode}"
       handler: "UnknownTextRouteStrategy->delegate"
       placeholders:

openvk-example.yml

@@ -102,6 +102,11 @@ openvk:
             fartscroll: false
             testLabel: false
         defaultMobileTheme: ""
+        imagesProxy:
+            replaceInNotes: true
+            settings:
+                url_prefix: ""
+                base64_decode_url: true
     
     telemetry:
         plausible: