Rewrite websocket.go to remove writeLoop and simplify readLoop

Closes #79
Closes #73

Author: nhooyr

accept.go

@@ -75,6 +75,7 @@ func verifyClientRequest(w http.ResponseWriter, r *http.Request) error {
 
 // Accept accepts a WebSocket handshake from a client and upgrades the
 // the connection to WebSocket.
+//
 // Accept will reject the handshake if the Origin domain is not the same as the Host unless
 // the InsecureSkipVerify option is set.
 func Accept(w http.ResponseWriter, r *http.Request, opts AcceptOptions) (*Conn, error) {
@@ -132,6 +133,8 @@ func accept(w http.ResponseWriter, r *http.Request, opts AcceptOptions) (*Conn,
 		closer:      netConn,
 	}
 	c.init()
+	// TODO document.
+	c.Context(r.Context())
 
 	return c, nil
 }

ci/lint/entrypoint.sh

@@ -7,5 +7,5 @@ source ci/lib.sh || exit 1
 	shellcheck ./**/*.sh
 )
 
-go vet -composites=false ./...
+go vet -composites=false -lostcancel=false ./...
 go run golang.org/x/lint/golint -set_exit_status ./...

export_test.go

@@ -14,5 +14,5 @@ import (
 // exceeds the buffer size which is 4096 right now as then an extra syscall
 // will be necessary to complete the message.
 func (c *Conn) Write(ctx context.Context, typ MessageType, p []byte) error {
-	return c.writeSingleFrame(ctx, opcode(typ), p)
+	return c.writeCompleteMessage(ctx, opcode(typ), p)
 }