rebase: Bump google.golang.org/grpc from 1.53.0 to 1.54.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.53.0 to 1.54.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.53.0...v1.54.0)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/google.golang.org/grpc/internal/binarylog/binarylog.go

@@ -28,8 +28,10 @@ import (
 	"google.golang.org/grpc/internal/grpcutil"
 )
 
-// Logger is the global binary logger. It can be used to get binary logger for
-// each method.
+var grpclogLogger = grpclog.Component("binarylog")
+
+// Logger specifies MethodLoggers for method names with a Log call that
+// takes a context.
 type Logger interface {
 	GetMethodLogger(methodName string) MethodLogger
 }
@@ -40,8 +42,6 @@ type Logger interface {
 // It is used to get a MethodLogger for each individual method.
 var binLogger Logger
 
-var grpclogLogger = grpclog.Component("binarylog")
-
 // SetLogger sets the binary logger.
 //
 // Only call this at init time.

vendor/google.golang.org/grpc/internal/binarylog/method_logger.go

@@ -19,6 +19,7 @@
 package binarylog
 
 import (
+	"context"
 	"net"
 	"strings"
 	"sync/atomic"
@@ -49,7 +50,7 @@ var idGen callIDGenerator
 
 // MethodLogger is the sub-logger for each method.
 type MethodLogger interface {
-	Log(LogEntryConfig)
+	Log(context.Context, LogEntryConfig)
 }
 
 // TruncatingMethodLogger is a method logger that truncates headers and messages
@@ -98,7 +99,7 @@ func (ml *TruncatingMethodLogger) Build(c LogEntryConfig) *binlogpb.GrpcLogEntry
 }
 
 // Log creates a proto binary log entry, and logs it to the sink.
-func (ml *TruncatingMethodLogger) Log(c LogEntryConfig) {
+func (ml *TruncatingMethodLogger) Log(ctx context.Context, c LogEntryConfig) {
 	ml.sink.Write(ml.Build(c))
 }
 

vendor/google.golang.org/grpc/internal/grpclog/prefixLogger.go

@@ -63,6 +63,9 @@ func (pl *PrefixLogger) Errorf(format string, args ...interface{}) {
 
 // Debugf does info logging at verbose level 2.
 func (pl *PrefixLogger) Debugf(format string, args ...interface{}) {
+	// TODO(6044): Refactor interfaces LoggerV2 and DepthLogger, and maybe
+	// rewrite PrefixLogger a little to ensure that we don't use the global
+	// `Logger` here, and instead use the `logger` field.
 	if !Logger.V(2) {
 		return
 	}
@@ -73,6 +76,15 @@ func (pl *PrefixLogger) Debugf(format string, args ...interface{}) {
 		return
 	}
 	InfoDepth(1, fmt.Sprintf(format, args...))
+
+}
+
+// V reports whether verbosity level l is at least the requested verbose level.
+func (pl *PrefixLogger) V(l int) bool {
+	// TODO(6044): Refactor interfaces LoggerV2 and DepthLogger, and maybe
+	// rewrite PrefixLogger a little to ensure that we don't use the global
+	// `Logger` here, and instead use the `logger` field.
+	return Logger.V(l)
 }
 
 // NewPrefixLogger creates a prefix logger with the given prefix.

vendor/google.golang.org/grpc/internal/internal.go

@@ -58,6 +58,9 @@ var (
 	// gRPC server. An xDS-enabled server needs to know what type of credentials
 	// is configured on the underlying gRPC server. This is set by server.go.
 	GetServerCredentials interface{} // func (*grpc.Server) credentials.TransportCredentials
+	// CanonicalString returns the canonical string of the code defined here:
+	// https://github.com/grpc/grpc/blob/master/doc/statuscodes.md.
+	CanonicalString interface{} // func (codes.Code) string
 	// DrainServerTransports initiates a graceful close of existing connections
 	// on a gRPC server accepted on the provided listener address. An
 	// xDS-enabled server invokes this method on a grpc.Server when a particular
@@ -74,6 +77,10 @@ var (
 	// globally for newly created client channels. The priority will be: 1.
 	// user-provided; 2. this method; 3. default values.
 	AddGlobalDialOptions interface{} // func(opt ...DialOption)
+	// DisableGlobalDialOptions returns a DialOption that prevents the
+	// ClientConn from applying the global DialOptions (set via
+	// AddGlobalDialOptions).
+	DisableGlobalDialOptions interface{} // func() grpc.DialOption
 	// ClearGlobalDialOptions clears the array of extra DialOption. This
 	// method is useful in testing and benchmarking.
 	ClearGlobalDialOptions func()
@@ -130,6 +137,9 @@ var (
 	//
 	// TODO: Remove this function once the RBAC env var is removed.
 	UnregisterRBACHTTPFilterForTesting func()
+
+	// ORCAAllowAnyMinReportingInterval is for examples/orca use ONLY.
+	ORCAAllowAnyMinReportingInterval interface{} // func(so *orca.ServiceOptions)
 )
 
 // HealthChecker defines the signature of the client-side LB channel health checking function.

vendor/google.golang.org/grpc/internal/metadata/metadata.go

@@ -76,33 +76,11 @@ func Set(addr resolver.Address, md metadata.MD) resolver.Address {
 	return addr
 }
 
-// Validate returns an error if the input md contains invalid keys or values.
-//
-// If the header is not a pseudo-header, the following items are checked:
-// - header names must contain one or more characters from this set [0-9 a-z _ - .].
-// - if the header-name ends with a "-bin" suffix, no validation of the header value is performed.
-// - otherwise, the header value must contain one or more characters from the set [%x20-%x7E].
+// Validate validates every pair in md with ValidatePair.
 func Validate(md metadata.MD) error {
 	for k, vals := range md {
-		// pseudo-header will be ignored
-		if k[0] == ':' {
-			continue
-		}
-		// check key, for i that saving a conversion if not using for range
-		for i := 0; i < len(k); i++ {
-			r := k[i]
-			if !(r >= 'a' && r <= 'z') && !(r >= '0' && r <= '9') && r != '.' && r != '-' && r != '_' {
-				return fmt.Errorf("header key %q contains illegal characters not in [0-9a-z-_.]", k)
-			}
-		}
-		if strings.HasSuffix(k, "-bin") {
-			continue
-		}
-		// check value
-		for _, val := range vals {
-			if hasNotPrintable(val) {
-				return fmt.Errorf("header key %q contains value with non-printable ASCII characters", k)
-			}
+		if err := ValidatePair(k, vals...); err != nil {
+			return err
 		}
 	}
 	return nil
@@ -118,3 +96,37 @@ func hasNotPrintable(msg string) bool {
 	}
 	return false
 }
+
+// ValidatePair validate a key-value pair with the following rules (the pseudo-header will be skipped) :
+//
+// - key must contain one or more characters.
+// - the characters in the key must be contained in [0-9 a-z _ - .].
+// - if the key ends with a "-bin" suffix, no validation of the corresponding value is performed.
+// - the characters in the every value must be printable (in [%x20-%x7E]).
+func ValidatePair(key string, vals ...string) error {
+	// key should not be empty
+	if key == "" {
+		return fmt.Errorf("there is an empty key in the header")
+	}
+	// pseudo-header will be ignored
+	if key[0] == ':' {
+		return nil
+	}
+	// check key, for i that saving a conversion if not using for range
+	for i := 0; i < len(key); i++ {
+		r := key[i]
+		if !(r >= 'a' && r <= 'z') && !(r >= '0' && r <= '9') && r != '.' && r != '-' && r != '_' {
+			return fmt.Errorf("header key %q contains illegal characters not in [0-9a-z-_.]", key)
+		}
+	}
+	if strings.HasSuffix(key, "-bin") {
+		return nil
+	}
+	// check value
+	for _, val := range vals {
+		if hasNotPrintable(val) {
+			return fmt.Errorf("header key %q contains value with non-printable ASCII characters", key)
+		}
+	}
+	return nil
+}

vendor/google.golang.org/grpc/internal/transport/controlbuf.go

@@ -22,6 +22,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"net"
 	"runtime"
 	"strconv"
 	"sync"
@@ -486,12 +487,13 @@ type loopyWriter struct {
 	hEnc          *hpack.Encoder // HPACK encoder.
 	bdpEst        *bdpEstimator
 	draining      bool
+	conn          net.Conn
 
 	// Side-specific handlers
 	ssGoAwayHandler func(*goAway) (bool, error)
 }
 
-func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimator) *loopyWriter {
+func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimator, conn net.Conn) *loopyWriter {
 	var buf bytes.Buffer
 	l := &loopyWriter{
 		side:          s,
@@ -504,6 +506,7 @@ func newLoopyWriter(s side, fr *framer, cbuf *controlBuffer, bdpEst *bdpEstimato
 		hBuf:          &buf,
 		hEnc:          hpack.NewEncoder(&buf),
 		bdpEst:        bdpEst,
+		conn:          conn,
 	}
 	return l
 }
@@ -521,15 +524,27 @@ const minBatchSize = 1000
 // 2. Stream level flow control quota available.
 //
 // In each iteration of run loop, other than processing the incoming control
-// frame, loopy calls processData, which processes one node from the activeStreams linked-list.
-// This results in writing of HTTP2 frames into an underlying write buffer.
-// When there's no more control frames to read from controlBuf, loopy flushes the write buffer.
-// As an optimization, to increase the batch size for each flush, loopy yields the processor, once
-// if the batch size is too low to give stream goroutines a chance to fill it up.
+// frame, loopy calls processData, which processes one node from the
+// activeStreams linked-list.  This results in writing of HTTP2 frames into an
+// underlying write buffer.  When there's no more control frames to read from
+// controlBuf, loopy flushes the write buffer.  As an optimization, to increase
+// the batch size for each flush, loopy yields the processor, once if the batch
+// size is too low to give stream goroutines a chance to fill it up.
+//
+// Upon exiting, if the error causing the exit is not an I/O error, run()
+// flushes and closes the underlying connection.  Otherwise, the connection is
+// left open to allow the I/O error to be encountered by the reader instead.
 func (l *loopyWriter) run() (err error) {
-	// Always flush the writer before exiting in case there are pending frames
-	// to be sent.
-	defer l.framer.writer.Flush()
+	defer func() {
+		if logger.V(logLevel) {
+			logger.Infof("transport: loopyWriter exiting with error: %v", err)
+		}
+		if !isIOError(err) {
+			l.framer.writer.Flush()
+			l.conn.Close()
+		}
+		l.cbuf.finish()
+	}()
 	for {
 		it, err := l.cbuf.get(true)
 		if err != nil {
@@ -581,11 +596,11 @@ func (l *loopyWriter) outgoingWindowUpdateHandler(w *outgoingWindowUpdate) error
 	return l.framer.fr.WriteWindowUpdate(w.streamID, w.increment)
 }
 
-func (l *loopyWriter) incomingWindowUpdateHandler(w *incomingWindowUpdate) error {
+func (l *loopyWriter) incomingWindowUpdateHandler(w *incomingWindowUpdate) {
 	// Otherwise update the quota.
 	if w.streamID == 0 {
 		l.sendQuota += w.increment
-		return nil
+		return
 	}
 	// Find the stream and update it.
 	if str, ok := l.estdStreams[w.streamID]; ok {
@@ -593,10 +608,9 @@ func (l *loopyWriter) incomingWindowUpdateHandler(w *incomingWindowUpdate) error
 		if strQuota := int(l.oiws) - str.bytesOutStanding; strQuota > 0 && str.state == waitingOnStreamQuota {
 			str.state = active
 			l.activeStreams.enqueue(str)
-			return nil
+			return
 		}
 	}
-	return nil
 }
 
 func (l *loopyWriter) outgoingSettingsHandler(s *outgoingSettings) error {
@@ -604,13 +618,11 @@ func (l *loopyWriter) outgoingSettingsHandler(s *outgoingSettings) error {
 }
 
 func (l *loopyWriter) incomingSettingsHandler(s *incomingSettings) error {
-	if err := l.applySettings(s.ss); err != nil {
-		return err
-	}
+	l.applySettings(s.ss)
 	return l.framer.fr.WriteSettingsAck()
 }
 
-func (l *loopyWriter) registerStreamHandler(h *registerStream) error {
+func (l *loopyWriter) registerStreamHandler(h *registerStream) {
 	str := &outStream{
 		id:    h.streamID,
 		state: empty,
@@ -618,7 +630,6 @@ func (l *loopyWriter) registerStreamHandler(h *registerStream) error {
 		wq:    h.wq,
 	}
 	l.estdStreams[h.streamID] = str
-	return nil
 }
 
 func (l *loopyWriter) headerHandler(h *headerFrame) error {
@@ -720,10 +731,10 @@ func (l *loopyWriter) writeHeader(streamID uint32, endStream bool, hf []hpack.He
 	return nil
 }
 
-func (l *loopyWriter) preprocessData(df *dataFrame) error {
+func (l *loopyWriter) preprocessData(df *dataFrame) {
 	str, ok := l.estdStreams[df.streamID]
 	if !ok {
-		return nil
+		return
 	}
 	// If we got data for a stream it means that
 	// stream was originated and the headers were sent out.
@@ -732,7 +743,6 @@ func (l *loopyWriter) preprocessData(df *dataFrame) error {
 		str.state = active
 		l.activeStreams.enqueue(str)
 	}
-	return nil
 }
 
 func (l *loopyWriter) pingHandler(p *ping) error {
@@ -743,9 +753,8 @@ func (l *loopyWriter) pingHandler(p *ping) error {
 
 }
 
-func (l *loopyWriter) outFlowControlSizeRequestHandler(o *outFlowControlSizeRequest) error {
+func (l *loopyWriter) outFlowControlSizeRequestHandler(o *outFlowControlSizeRequest) {
 	o.resp <- l.sendQuota
-	return nil
 }
 
 func (l *loopyWriter) cleanupStreamHandler(c *cleanupStream) error {
@@ -763,6 +772,7 @@ func (l *loopyWriter) cleanupStreamHandler(c *cleanupStream) error {
 		}
 	}
 	if l.draining && len(l.estdStreams) == 0 {
+		// Flush and close the connection; we are done with it.
 		return errors.New("finished processing active streams while in draining mode")
 	}
 	return nil
@@ -798,6 +808,7 @@ func (l *loopyWriter) incomingGoAwayHandler(*incomingGoAway) error {
 	if l.side == clientSide {
 		l.draining = true
 		if len(l.estdStreams) == 0 {
+			// Flush and close the connection; we are done with it.
 			return errors.New("received GOAWAY with no active streams")
 		}
 	}
@@ -816,17 +827,10 @@ func (l *loopyWriter) goAwayHandler(g *goAway) error {
 	return nil
 }
 
-func (l *loopyWriter) closeConnectionHandler() error {
-	// Exit loopyWriter entirely by returning an error here.  This will lead to
-	// the transport closing the connection, and, ultimately, transport
-	// closure.
-	return ErrConnClosing
-}
-
 func (l *loopyWriter) handle(i interface{}) error {
 	switch i := i.(type) {
 	case *incomingWindowUpdate:
-		return l.incomingWindowUpdateHandler(i)
+		l.incomingWindowUpdateHandler(i)
 	case *outgoingWindowUpdate:
 		return l.outgoingWindowUpdateHandler(i)
 	case *incomingSettings:
@@ -836,7 +840,7 @@ func (l *loopyWriter) handle(i interface{}) error {
 	case *headerFrame:
 		return l.headerHandler(i)
 	case *registerStream:
-		return l.registerStreamHandler(i)
+		l.registerStreamHandler(i)
 	case *cleanupStream:
 		return l.cleanupStreamHandler(i)
 	case *earlyAbortStream:
@@ -844,21 +848,24 @@ func (l *loopyWriter) handle(i interface{}) error {
 	case *incomingGoAway:
 		return l.incomingGoAwayHandler(i)
 	case *dataFrame:
-		return l.preprocessData(i)
+		l.preprocessData(i)
 	case *ping:
 		return l.pingHandler(i)
 	case *goAway:
 		return l.goAwayHandler(i)
 	case *outFlowControlSizeRequest:
-		return l.outFlowControlSizeRequestHandler(i)
+		l.outFlowControlSizeRequestHandler(i)
 	case closeConnection:
-		return l.closeConnectionHandler()
+		// Just return a non-I/O error and run() will flush and close the
+		// connection.
+		return ErrConnClosing
 	default:
 		return fmt.Errorf("transport: unknown control message type %T", i)
 	}
+	return nil
 }
 
-func (l *loopyWriter) applySettings(ss []http2.Setting) error {
+func (l *loopyWriter) applySettings(ss []http2.Setting) {
 	for _, s := range ss {
 		switch s.ID {
 		case http2.SettingInitialWindowSize:
@@ -877,7 +884,6 @@ func (l *loopyWriter) applySettings(ss []http2.Setting) error {
 			updateHeaderTblSize(l.hEnc, s.Val)
 		}
 	}
-	return nil
 }
 
 // processData removes the first stream from active streams, writes out at most 16KB
@@ -911,7 +917,7 @@ func (l *loopyWriter) processData() (bool, error) {
 				return false, err
 			}
 			if err := l.cleanupStreamHandler(trailer.cleanup); err != nil {
-				return false, nil
+				return false, err
 			}
 		} else {
 			l.activeStreams.enqueue(str)

vendor/google.golang.org/grpc/internal/transport/http2_client.go

@@ -444,15 +444,8 @@ func newHTTP2Client(connectCtx, ctx context.Context, addr resolver.Address, opts
 		return nil, err
 	}
 	go func() {
-		t.loopy = newLoopyWriter(clientSide, t.framer, t.controlBuf, t.bdpEst)
-		err := t.loopy.run()
-		if logger.V(logLevel) {
-			logger.Infof("transport: loopyWriter exited. Closing connection. Err: %v", err)
-		}
-		// Do not close the transport.  Let reader goroutine handle it since
-		// there might be data in the buffers.
-		t.conn.Close()
-		t.controlBuf.finish()
+		t.loopy = newLoopyWriter(clientSide, t.framer, t.controlBuf, t.bdpEst, t.conn)
+		t.loopy.run()
 		close(t.writerDone)
 	}()
 	return t, nil
@@ -1264,10 +1257,12 @@ func (t *http2Client) handleGoAway(f *http2.GoAwayFrame) {
 		t.mu.Unlock()
 		return
 	}
-	if f.ErrCode == http2.ErrCodeEnhanceYourCalm {
-		if logger.V(logLevel) {
-			logger.Infof("Client received GoAway with http2.ErrCodeEnhanceYourCalm.")
-		}
+	if f.ErrCode == http2.ErrCodeEnhanceYourCalm && string(f.DebugData()) == "too_many_pings" {
+		// When a client receives a GOAWAY with error code ENHANCE_YOUR_CALM and debug
+		// data equal to ASCII "too_many_pings", it should log the occurrence at a log level that is
+		// enabled by default and double the configure KEEPALIVE_TIME used for new connections
+		// on that channel.
+		logger.Errorf("Client received GoAway with error code ENHANCE_YOUR_CALM and debug data equal to ASCII \"too_many_pings\".")
 	}
 	id := f.LastStreamID
 	if id > 0 && id%2 == 0 {

vendor/google.golang.org/grpc/internal/transport/http2_server.go

@@ -331,14 +331,9 @@ func NewServerTransport(conn net.Conn, config *ServerConfig) (_ ServerTransport,
 	t.handleSettings(sf)
 
 	go func() {
-		t.loopy = newLoopyWriter(serverSide, t.framer, t.controlBuf, t.bdpEst)
+		t.loopy = newLoopyWriter(serverSide, t.framer, t.controlBuf, t.bdpEst, t.conn)
 		t.loopy.ssGoAwayHandler = t.outgoingGoAwayHandler
-		err := t.loopy.run()
-		if logger.V(logLevel) {
-			logger.Infof("transport: loopyWriter exited. Closing connection. Err: %v", err)
-		}
-		t.conn.Close()
-		t.controlBuf.finish()
+		t.loopy.run()
 		close(t.writerDone)
 	}()
 	go t.keepalive()
@@ -383,7 +378,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 		// if false, content-type was missing or invalid
 		isGRPC      = false
 		contentType = ""
-		mdata       = make(map[string][]string)
+		mdata       = make(metadata.MD, len(frame.Fields))
 		httpMethod  string
 		// these are set if an error is encountered while parsing the headers
 		protocolError bool
@@ -404,6 +399,17 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 			mdata[hf.Name] = append(mdata[hf.Name], hf.Value)
 			s.contentSubtype = contentSubtype
 			isGRPC = true
+
+		case "grpc-accept-encoding":
+			mdata[hf.Name] = append(mdata[hf.Name], hf.Value)
+			if hf.Value == "" {
+				continue
+			}
+			compressors := hf.Value
+			if s.clientAdvertisedCompressors != "" {
+				compressors = s.clientAdvertisedCompressors + "," + compressors
+			}
+			s.clientAdvertisedCompressors = compressors
 		case "grpc-encoding":
 			s.recvCompress = hf.Value
 		case ":method":
@@ -595,7 +601,7 @@ func (t *http2Server) operateHeaders(frame *http2.MetaHeadersFrame, handle func(
 			LocalAddr:   t.localAddr,
 			Compression: s.recvCompress,
 			WireLength:  int(frame.Header().Length),
-			Header:      metadata.MD(mdata).Copy(),
+			Header:      mdata.Copy(),
 		}
 		sh.HandleRPC(s.ctx, inHeader)
 	}
@@ -1344,9 +1350,6 @@ func (t *http2Server) outgoingGoAwayHandler(g *goAway) (bool, error) {
 			return false, err
 		}
 		if retErr != nil {
-			// Abruptly close the connection following the GoAway (via
-			// loopywriter).  But flush out what's inside the buffer first.
-			t.framer.writer.Flush()
 			return false, retErr
 		}
 		return true, nil

vendor/google.golang.org/grpc/internal/transport/http_util.go

@@ -21,6 +21,7 @@ package transport
 import (
 	"bufio"
 	"encoding/base64"
+	"errors"
 	"fmt"
 	"io"
 	"math"
@@ -330,7 +331,8 @@ func (w *bufWriter) Write(b []byte) (n int, err error) {
 		return 0, w.err
 	}
 	if w.batchSize == 0 { // Buffer has been disabled.
-		return w.conn.Write(b)
+		n, err = w.conn.Write(b)
+		return n, toIOError(err)
 	}
 	for len(b) > 0 {
 		nn := copy(w.buf[w.offset:], b)
@@ -352,10 +354,30 @@ func (w *bufWriter) Flush() error {
 		return nil
 	}
 	_, w.err = w.conn.Write(w.buf[:w.offset])
+	w.err = toIOError(w.err)
 	w.offset = 0
 	return w.err
 }
 
+type ioError struct {
+	error
+}
+
+func (i ioError) Unwrap() error {
+	return i.error
+}
+
+func isIOError(err error) bool {
+	return errors.As(err, &ioError{})
+}
+
+func toIOError(err error) error {
+	if err == nil {
+		return nil
+	}
+	return ioError{error: err}
+}
+
 type framer struct {
 	writer *bufWriter
 	fr     *http2.Framer

vendor/google.golang.org/grpc/internal/transport/transport.go

@@ -257,6 +257,9 @@ type Stream struct {
 	fc           *inFlow
 	wq           *writeQuota
 
+	// Holds compressor names passed in grpc-accept-encoding metadata from the
+	// client. This is empty for the client side stream.
+	clientAdvertisedCompressors string
 	// Callback to state application's intentions to read data. This
 	// is used to adjust flow control, if needed.
 	requestRead func(int)
@@ -345,8 +348,24 @@ func (s *Stream) RecvCompress() string {
 }
 
 // SetSendCompress sets the compression algorithm to the stream.
-func (s *Stream) SetSendCompress(str string) {
-	s.sendCompress = str
+func (s *Stream) SetSendCompress(name string) error {
+	if s.isHeaderSent() || s.getState() == streamDone {
+		return errors.New("transport: set send compressor called after headers sent or stream done")
+	}
+
+	s.sendCompress = name
+	return nil
+}
+
+// SendCompress returns the send compressor name.
+func (s *Stream) SendCompress() string {
+	return s.sendCompress
+}
+
+// ClientAdvertisedCompressors returns the compressor names advertised by the
+// client via grpc-accept-encoding header.
+func (s *Stream) ClientAdvertisedCompressors() string {
+	return s.clientAdvertisedCompressors
 }
 
 // Done returns a channel which is closed when it receives the final status