LogDog: Update client/bootstrap to generate URLs.

logdog/client/butlerlib/streamclient/stream.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package streamclient
 
 import (
         "errors"
         "io"
 
         "github.com/luci/luci-go/common/data/recordio"
         "github.com/luci/luci-go/logdog/api/logpb"
         "github.com/luci/luci-go/logdog/client/butlerlib/streamproto"
 )
 
 // Stream is an individual LogDog Butler stream.
 type Stream interface {
         io.WriteCloser
 
         // WriteDatagram writes a LogDog Butler streaming datagram to the underlying
         // Writer.
         WriteDatagram([]byte) error
+
+        // Properties returns a copy of this Stream's properties.
+        Properties() *streamproto.Properties
 }
 
 // streamImpl is the standard implementation of the Stream interface.
 type streamImpl struct {
-        *streamproto.Properties
         io.WriteCloser
 
+        // props is this stream's properties.
+        props *streamproto.Properties
+
         // rioW is a recordio.Writer bound to the WriteCloser. This will be
         // initialized on the first writeRecord invocation.
         rioW recordio.Writer
 }
 
 var _ Stream = (*streamImpl)(nil)
 
 func (s *streamImpl) WriteDatagram(dg []byte) error {
         if !s.isDatagramStream() {
                 return errors.New("not a datagram stream")
@@ skipping 18 matching lines @@
         if s.rioW == nil {
                 s.rioW = recordio.NewWriter(s.WriteCloser)
         }
         if _, err := s.rioW.Write(r); err != nil {
                 return err
         }
         return s.rioW.Flush()
 }
 
 func (s *streamImpl) isDatagramStream() bool {
-        return s.StreamType == logpb.StreamType_DATAGRAM
+        return s.props.StreamType == logpb.StreamType_DATAGRAM
 }
+
+func (s *streamImpl) Properties() *streamproto.Properties { return s.props.Clone() }