[fix bug] fix twice enc.

- fix twice enc.
- enable proxy (temp ver.)
- rewite websocket::next.

src/proxy.rs

@@ -56,7 +56,7 @@ const MAXIMUM_RESPONSE_HEADERS: usize = 16;
 const DEFINE_TIME_OUT: u64 = 600;
 
 pub trait IntoUrl {
-    
+
     // Besides parsing as a valid `Url`, the `Url` must be a valid
     // `http::Uri`, in that it makes sense to use in a network request.
     fn into_url(self) -> Result<Url, ProxyError>;