add correct charset to http header

app/HtmlDocument.php

@@ -8,6 +8,7 @@ class HtmlDocument extends Document
 {
 
     private $htmlString;
+    private $encoding;
 
     public function __construct($password, $baseUrl, $htmlString, $encoding)
     {
@@ -30,7 +31,7 @@ class HtmlDocument extends Document
                 if ($meta->hasAttribute("http-equiv") && strtolower($meta->getAttribute("http-equiv")) === "content-type" && $meta->hasAttribute("content")) {
                     $contentType = $meta->getAttribute("content");
                     $encoding = stripos($contentType, "charset=") !== false ? trim(substr($contentType, stripos($contentType, "charset=") + 8)) : null;
-                    $contentEncoding = rtrim($contentEncoding, ";");
+                    $encoding = rtrim($encoding, ";");
                     if ($encoding !== null) {
                         break;
                     }
@@ -48,6 +49,7 @@ class HtmlDocument extends Document
             # Default Fallback
         }
         if (!empty($encoding)) {
+            $this->encoding = $encoding;
             return mb_convert_encoding($htmlString, 'HTML-ENTITIES', $encoding);
         } else {
             return mb_convert_encoding($htmlString, 'HTML-ENTITIES');
@@ -59,6 +61,11 @@ class HtmlDocument extends Document
         return $this->htmlString;
     }
 
+    public function getEncoding()
+    {
+        return $this->encoding;
+    }
+
     /**
      * Function proxifyContent
      * This method parses the given String and Proxifies all Links/Urls in it so it's targetting this Proxy Server

app/Http/Controllers/ProxyController.php

@@ -205,6 +205,7 @@ class ProxyController extends Controller
                     # It's an html document
                     $htmlDocument = new HtmlDocument($password, $targetUrl, $result["data"], $contentEncoding);
                     $htmlDocument->proxifyContent();
+                    $result['header']['content-type'] = $contentType . "; charset=" . $htmlDocument->getEncoding();
                     $result["data"] = $htmlDocument->getResult();
                     break;
                 case 'application/pdf':