ContentLength calculation refactored

src/main/java/com/corundumstudio/socketio/handler/ResourceHandler.java

@@ -106,8 +106,7 @@ public class ResourceHandler extends ChannelInboundHandlerAdapter {
                 // create ok response
                 HttpResponse res = new DefaultHttpResponse(HTTP_1_1, HttpResponseStatus.OK);
                 // set Content-Length header
-                long fileSize = getHeaderFieldLong(fileUrl, "content-length");
-                setContentLength(res, fileSize);
+                setContentLength(res, fileUrl.getContentLength());
                 // set Content-Type header
                 setContentTypeHeader(res, fileUrl);
                 // set Date, Expires, Cache-Control and Last-Modified headers
@@ -126,11 +125,6 @@ public class ResourceHandler extends ChannelInboundHandlerAdapter {
         ctx.fireChannelRead(msg);
     }
 
-    public long getHeaderFieldLong(URLConnection fileUrl, String name) {
-        String value = fileUrl.getHeaderField(name);
-        return Long.parseLong(value);
-    }
-
     /*
      * Checks if the content has been modified sicne the date provided by the IF_MODIFIED_SINCE http header
      * */