X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/dd2320c6877939365caf79767b5244d86a288437..44c95f99098fa6c6acbfa82d4b6cbc6015eb6e39:/services/ws/handler.go

diff --git a/services/ws/handler.go b/services/ws/handler.go
index ca9231c986..f9f7f53edc 100644
--- a/services/ws/handler.go
+++ b/services/ws/handler.go
@@ -1,3 +1,7 @@
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
 package main
 
 import (
@@ -31,6 +35,7 @@ func (h *handler) Handle(ws wsConn, eventSource eventSource, newSession func(wsC
 	h.setupOnce.Do(h.setup)
 
 	ctx, cancel := context.WithCancel(ws.Request().Context())
+	defer cancel()
 	log := logger(ctx)
 
 	incoming := eventSource.NewSink()
@@ -52,6 +57,8 @@ func (h *handler) Handle(ws wsConn, eventSource eventSource, newSession func(wsC
 		return
 	}
 
+	// Receive websocket frames from the client and pass them to
+	// sess.Receive().
 	go func() {
 		buf := make([]byte, 2<<20)
 		for {
@@ -83,6 +90,9 @@ func (h *handler) Handle(ws wsConn, eventSource eventSource, newSession func(wsC
 		}
 	}()
 
+	// Take items from the outgoing queue, serialize them using
+	// sess.EventMessage() as needed, and send them to the client
+	// as websocket frames.
 	go func() {
 		for {
 			var ok bool