Resolve "use multi curl to improve performance"

Closes #19 (closed)

app/Models/HttpParser.php

@@ -13,7 +13,7 @@ class HttpParser
         foreach($headerLine as $line) {
             if(stripos($line, ": ")) {
                 $tmp = explode(": ", $line);
-                $header[$tmp[0]] = $tmp[1];
+                $header[strtolower($tmp[0])] = $tmp[1];
             }
         }
         if(!isset($header['content-type'])) {