TUN-3403: Unit test for origin/proxy to test serving HTTP and Websocket

vendor/github.com/gobwas/ws/wsutil/wsutil.go

@@ -0,0 +1,57 @@
+/*
+Package wsutil provides utilities for working with WebSocket protocol.
+
+Overview:
+
+  // Read masked text message from peer and check utf8 encoding.
+  header, err := ws.ReadHeader(conn)
+  if err != nil {
+	  // handle err
+  }
+
+  // Prepare to read payload.
+  r := io.LimitReader(conn, header.Length)
+  r = wsutil.NewCipherReader(r, header.Mask)
+  r = wsutil.NewUTF8Reader(r)
+
+  payload, err := ioutil.ReadAll(r)
+  if err != nil {
+	  // handle err
+  }
+
+You could get the same behavior using just `wsutil.Reader`:
+
+  r := wsutil.Reader{
+	  Source:    conn,
+	  CheckUTF8: true,
+  }
+
+  payload, err := ioutil.ReadAll(r)
+  if err != nil {
+	  // handle err
+  }
+
+Or even simplest:
+
+  payload, err := wsutil.ReadClientText(conn)
+  if err != nil {
+	  // handle err
+  }
+
+Package is also exports tools for buffered writing:
+
+  // Create buffered writer, that will buffer output bytes and send them as
+  // 128-length fragments (with exception on large writes, see the doc).
+  writer := wsutil.NewWriterSize(conn, ws.StateServerSide, ws.OpText, 128)
+
+  _, err := io.CopyN(writer, rand.Reader, 100)
+  if err == nil {
+	  err = writer.Flush()
+  }
+  if err != nil {
+	  // handle error
+  }
+
+For more utils and helpers see the documentation.
+*/
+package wsutil