Merge branch 'go-1.5-compat' into 'master'

Downgrade grpc to get Go 1.5 compatibility

Closes #85

See merge request !133

.gitlab-ci.yml

@@ -44,12 +44,29 @@ rspec:ruby2.1:
   except:
     - tags
 
-go:
-  # Image taken from gitlab-ce@59f81b4ff8
-  image: "dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.3.3-golang-1.8-git-2.7-phantomjs-2.1-node-7.1"
+.go: &go_definition
+  before_script:
+  - apt-get update -qq && apt-get install -y ruby
+  - ruby -v
   script:
     - go version
     - which go
     - bin/compile
     - support/go-test
     - support/go-format check
+
+go:1.8:
+  <<: *go_definition
+  image: golang:1.8
+
+go:1.7:
+  <<: *go_definition
+  image: golang:1.7
+
+go:1.6:
+  <<: *go_definition
+  image: golang:1.6
+
+go:1.5:
+  <<: *go_definition
+  image: golang:1.5

go/vendor/google.golang.org/grpc/README.md

-# gRPC-Go
+#gRPC-Go
 
 [![Build Status](https://travis-ci.org/grpc/grpc-go.svg)](https://travis-ci.org/grpc/grpc-go) [![GoDoc](https://godoc.org/google.golang.org/grpc?status.svg)](https://godoc.org/google.golang.org/grpc)
 
@@ -16,7 +16,23 @@ $ go get google.golang.org/grpc
 Prerequisites
 -------------
 
-This requires Go 1.6 or later.
+This requires Go 1.5 or later.
+
+A note on the version used: significant performance improvements in benchmarks
+of grpc-go have been seen by upgrading the go version from 1.5 to the latest
+1.7.1.
+
+From https://golang.org/doc/install, one way to install the latest version of go is:
+```
+$ GO_VERSION=1.7.1
+$ OS=linux
+$ ARCH=amd64
+$ curl -O https://storage.googleapis.com/golang/go${GO_VERSION}.${OS}-${ARCH}.tar.gz
+$ sudo tar -C /usr/local -xzf go$GO_VERSION.$OS-$ARCH.tar.gz
+$ # Put go on the PATH, keep the usual installation dir
+$ sudo ln -s /usr/local/go/bin/go /usr/bin/go
+$ rm go$GO_VERSION.$OS-$ARCH.tar.gz
+```
 
 Constraints
 -----------

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

@@ -36,14 +36,13 @@ package grpc
 import (
 	"bytes"
 	"io"
+	"math"
 	"time"
 
 	"golang.org/x/net/context"
 	"golang.org/x/net/trace"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/transport"
 )
 
@@ -73,22 +72,19 @@ func recvResponse(ctx context.Context, dopts dialOptions, t transport.ClientTran
 		}
 	}
 	for {
-		if err = recv(p, dopts.codec, stream, dopts.dc, reply, dopts.maxMsgSize, inPayload); err != nil {
+		if err = recv(p, dopts.codec, stream, dopts.dc, reply, math.MaxInt32, inPayload); err != nil {
 			if err == io.EOF {
 				break
 			}
 			return
 		}
 	}
-	if inPayload != nil && err == io.EOF && stream.Status().Code() == codes.OK {
+	if inPayload != nil && err == io.EOF && stream.StatusCode() == codes.OK {
 		// TODO in the current implementation, inTrailer may be handled before inPayload in some cases.
 		// Fix the order if necessary.
 		dopts.copts.StatsHandler.HandleRPC(ctx, inPayload)
 	}
 	c.trailerMD = stream.Trailer()
-	if peer, ok := peer.FromContext(stream.Context()); ok {
-		c.peer = peer
-	}
 	return nil
 }
 
@@ -231,7 +227,7 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
 		t, put, err = cc.getTransport(ctx, gopts)
 		if err != nil {
 			// TODO(zhaoq): Probably revisit the error handling.
-			if _, ok := status.FromError(err); ok {
+			if _, ok := err.(*rpcError); ok {
 				return err
 			}
 			if err == errConnClosing || err == errConnUnavailable {
@@ -285,6 +281,6 @@ func invoke(ctx context.Context, method string, args, reply interface{}, cc *Cli
 			put()
 			put = nil
 		}
-		return stream.Status().Err()
+		return Errorf(stream.StatusCode(), "%s", stream.StatusDesc())
 	}
 }

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

@@ -40,7 +40,7 @@ import (
 // UnaryInvoker is called by UnaryClientInterceptor to complete RPCs.
 type UnaryInvoker func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, opts ...CallOption) error
 
-// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. invoker is the handler to complete the RPC
+// UnaryClientInterceptor intercepts the execution of a unary RPC on the client. inovker is the handler to complete the RPC
 // and it is the responsibility of the interceptor to call it.
 // This is the EXPERIMENTAL API.
 type UnaryClientInterceptor func(ctx context.Context, method string, req, reply interface{}, cc *ClientConn, invoker UnaryInvoker, opts ...CallOption) error

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

@@ -37,6 +37,7 @@ import (
 	"bytes"
 	"compress/gzip"
 	"encoding/binary"
+	"fmt"
 	"io"
 	"io/ioutil"
 	"math"
@@ -47,9 +48,7 @@ import (
 	"golang.org/x/net/context"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/peer"
 	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/transport"
 )
 
@@ -141,7 +140,6 @@ type callInfo struct {
 	failFast  bool
 	headerMD  metadata.MD
 	trailerMD metadata.MD
-	peer      *peer.Peer
 	traceInfo traceInfo // in trace.go
 }
 
@@ -185,22 +183,12 @@ func Trailer(md *metadata.MD) CallOption {
 	})
 }
 
-// Peer returns a CallOption that retrieves peer information for a
-// unary RPC.
-func Peer(peer *peer.Peer) CallOption {
-	return afterCall(func(c *callInfo) {
-		if c.peer != nil {
-			*peer = *c.peer
-		}
-	})
-}
-
 // FailFast configures the action to take when an RPC is attempted on broken
 // connections or unreachable servers. If failfast is true, the RPC will fail
 // immediately. Otherwise, the RPC client will block the call until a
 // connection is available (or the call is canceled or times out) and will retry
 // the call if it fails due to a transient error. Please refer to
-// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md. Note: failFast is default to true.
+// https://github.com/grpc/grpc/blob/master/doc/fail_fast.md
 func FailFast(failFast bool) CallOption {
 	return beforeCall(func(c *callInfo) error {
 		c.failFast = failFast
@@ -372,57 +360,88 @@ func recv(p *parser, c Codec, s *transport.Stream, dc Decompressor, m interface{
 	return nil
 }
 
+// rpcError defines the status from an RPC.
+type rpcError struct {
+	code codes.Code
+	desc string
+}
+
+func (e *rpcError) Error() string {
+	return fmt.Sprintf("rpc error: code = %d desc = %s", e.code, e.desc)
+}
+
 // Code returns the error code for err if it was produced by the rpc system.
 // Otherwise, it returns codes.Unknown.
-//
-// Deprecated; use status.FromError and Code method instead.
 func Code(err error) codes.Code {
-	if s, ok := status.FromError(err); ok {
-		return s.Code()
+	if err == nil {
+		return codes.OK
+	}
+	if e, ok := err.(*rpcError); ok {
+		return e.code
 	}
 	return codes.Unknown
 }
 
 // ErrorDesc returns the error description of err if it was produced by the rpc system.
 // Otherwise, it returns err.Error() or empty string when err is nil.
-//
-// Deprecated; use status.FromError and Message method instead.
 func ErrorDesc(err error) string {
-	if s, ok := status.FromError(err); ok {
-		return s.Message()
+	if err == nil {
+		return ""
+	}
+	if e, ok := err.(*rpcError); ok {
+		return e.desc
 	}
 	return err.Error()
 }
 
 // Errorf returns an error containing an error code and a description;
 // Errorf returns nil if c is OK.
-//
-// Deprecated; use status.Errorf instead.
 func Errorf(c codes.Code, format string, a ...interface{}) error {
-	return status.Errorf(c, format, a...)
+	if c == codes.OK {
+		return nil
+	}
+	return &rpcError{
+		code: c,
+		desc: fmt.Sprintf(format, a...),
+	}
 }
 
-// toRPCErr converts an error into an error from the status package.
+// toRPCErr converts an error into a rpcError.
 func toRPCErr(err error) error {
-	if _, ok := status.FromError(err); ok {
-		return err
-	}
 	switch e := err.(type) {
+	case *rpcError:
+		return err
 	case transport.StreamError:
-		return status.Error(e.Code, e.Desc)
+		return &rpcError{
+			code: e.Code,
+			desc: e.Desc,
+		}
 	case transport.ConnectionError:
-		return status.Error(codes.Internal, e.Desc)
+		return &rpcError{
+			code: codes.Internal,
+			desc: e.Desc,
+		}
 	default:
 		switch err {
 		case context.DeadlineExceeded:
-			return status.Error(codes.DeadlineExceeded, err.Error())
+			return &rpcError{
+				code: codes.DeadlineExceeded,
+				desc: err.Error(),
+			}
 		case context.Canceled:
-			return status.Error(codes.Canceled, err.Error())
+			return &rpcError{
+				code: codes.Canceled,
+				desc: err.Error(),
+			}
 		case ErrClientConnClosing:
-			return status.Error(codes.FailedPrecondition, err.Error())
+			return &rpcError{
+				code: codes.FailedPrecondition,
+				desc: err.Error(),
+			}
 		}
+
 	}
-	return status.Error(codes.Unknown, err.Error())
+	return Errorf(codes.Unknown, "%v", err)
 }
 
 // convertCode converts a standard Go error into its canonical code. Note that
@@ -467,17 +486,17 @@ type MethodConfig struct {
 	// then the other will be used.  If neither is set, then the RPC has no deadline.
 	Timeout time.Duration
 	// MaxReqSize is the maximum allowed payload size for an individual request in a
-	// stream (client->server) in bytes. The size which is measured is the serialized
-	// payload after per-message compression (but before stream compression) in bytes.
-	// The actual value used is the minumum of the value specified here and the value set
-	// by the application via the gRPC client API. If either one is not set, then the other
-	// will be used.  If neither is set, then the built-in default is used.
+	// stream (client->server) in bytes. The size which is measured is the serialized,
+	// uncompressed payload in bytes. The actual value used is the minumum of the value
+	// specified here and the value set by the application via the gRPC client API. If
+	// either one is not set, then the other will be used.  If neither is set, then the
+	// built-in default is used.
 	// TODO: support this.
-	MaxReqSize uint32
+	MaxReqSize uint64
 	// MaxRespSize is the maximum allowed payload size for an individual response in a
 	// stream (server->client) in bytes.
 	// TODO: support this.
-	MaxRespSize uint32
+	MaxRespSize uint64
 }
 
 // ServiceConfig is provided by the service provider and contains parameters for how
@@ -498,6 +517,3 @@ type ServiceConfig struct {
 // requires a synchronised update of grpc-go and protoc-gen-go. This constant
 // should not be referenced from any other code.
 const SupportPackageIsVersion4 = true
-
-// Version is the current grpc version.
-const Version = "1.3.0-dev"

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

@@ -37,6 +37,7 @@ import (
 	"bytes"
 	"errors"
 	"io"
+	"math"
 	"sync"
 	"time"
 
@@ -45,7 +46,6 @@ import (
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/transport"
 )
 
@@ -178,7 +178,7 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		t, put, err = cc.getTransport(ctx, gopts)
 		if err != nil {
 			// TODO(zhaoq): Probably revisit the error handling.
-			if _, ok := status.FromError(err); ok {
+			if _, ok := err.(*rpcError); ok {
 				return nil, err
 			}
 			if err == errConnClosing || err == errConnUnavailable {
@@ -208,14 +208,13 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		break
 	}
 	cs := &clientStream{
-		opts:       opts,
-		c:          c,
-		desc:       desc,
-		codec:      cc.dopts.codec,
-		cp:         cc.dopts.cp,
-		dc:         cc.dopts.dc,
-		maxMsgSize: cc.dopts.maxMsgSize,
-		cancel:     cancel,
+		opts:   opts,
+		c:      c,
+		desc:   desc,
+		codec:  cc.dopts.codec,
+		cp:     cc.dopts.cp,
+		dc:     cc.dopts.dc,
+		cancel: cancel,
 
 		put: put,
 		t:   t,
@@ -240,7 +239,11 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 		case <-s.Done():
 			// TODO: The trace of the RPC is terminated here when there is no pending
 			// I/O, which is probably not the optimal solution.
-			cs.finish(s.Status().Err())
+			if s.StatusCode() == codes.OK {
+				cs.finish(nil)
+			} else {
+				cs.finish(Errorf(s.StatusCode(), "%s", s.StatusDesc()))
+			}
 			cs.closeTransportStream(nil)
 		case <-s.GoAway():
 			cs.finish(errConnDrain)
@@ -256,18 +259,17 @@ func newClientStream(ctx context.Context, desc *StreamDesc, cc *ClientConn, meth
 
 // clientStream implements a client side Stream.
 type clientStream struct {
-	opts       []CallOption
-	c          callInfo
-	t          transport.ClientTransport
-	s          *transport.Stream
-	p          *parser
-	desc       *StreamDesc
-	codec      Codec
-	cp         Compressor
-	cbuf       *bytes.Buffer
-	dc         Decompressor
-	maxMsgSize int
-	cancel     context.CancelFunc
+	opts   []CallOption
+	c      callInfo
+	t      transport.ClientTransport
+	s      *transport.Stream
+	p      *parser
+	desc   *StreamDesc
+	codec  Codec
+	cp     Compressor
+	cbuf   *bytes.Buffer
+	dc     Decompressor
+	cancel context.CancelFunc
 
 	tracing bool // set to EnableTracing when the clientStream is created.
 
@@ -380,7 +382,7 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
 			Client: true,
 		}
 	}
-	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, inPayload)
+	err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, inPayload)
 	defer func() {
 		// err != nil indicates the termination of the stream.
 		if err != nil {
@@ -403,17 +405,17 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
 		}
 		// Special handling for client streaming rpc.
 		// This recv expects EOF or errors, so we don't collect inPayload.
-		err = recv(cs.p, cs.codec, cs.s, cs.dc, m, cs.maxMsgSize, nil)
+		err = recv(cs.p, cs.codec, cs.s, cs.dc, m, math.MaxInt32, nil)
 		cs.closeTransportStream(err)
 		if err == nil {
 			return toRPCErr(errors.New("grpc: client streaming protocol violation: get <nil>, want <EOF>"))
 		}
 		if err == io.EOF {
-			if se := cs.s.Status().Err(); se != nil {
-				return se
+			if cs.s.StatusCode() == codes.OK {
+				cs.finish(err)
+				return nil
 			}
-			cs.finish(err)
-			return nil
+			return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
 		}
 		return toRPCErr(err)
 	}
@@ -421,11 +423,11 @@ func (cs *clientStream) RecvMsg(m interface{}) (err error) {
 		cs.closeTransportStream(err)
 	}
 	if err == io.EOF {
-		if statusErr := cs.s.Status().Err(); statusErr != nil {
-			return statusErr
+		if cs.s.StatusCode() == codes.OK {
+			// Returns io.EOF to indicate the end of the stream.
+			return
 		}
-		// Returns io.EOF to indicate the end of the stream.
-		return
+		return Errorf(cs.s.StatusCode(), "%s", cs.s.StatusDesc())
 	}
 	return toRPCErr(err)
 }
@@ -517,6 +519,8 @@ type serverStream struct {
 	dc         Decompressor
 	cbuf       *bytes.Buffer
 	maxMsgSize int
+	statusCode codes.Code
+	statusDesc string
 	trInfo     *traceInfo
 
 	statsHandler stats.Handler

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

@@ -35,9 +35,7 @@ package transport
 
 import (
 	"fmt"
-	"math"
 	"sync"
-	"time"
 
 	"golang.org/x/net/http2"
 )
@@ -46,18 +44,8 @@ const (
 	// The default value of flow control window size in HTTP2 spec.
 	defaultWindowSize = 65535
 	// The initial window size for flow control.
-	initialWindowSize             = defaultWindowSize      // for an RPC
-	initialConnWindowSize         = defaultWindowSize * 16 // for a connection
-	infinity                      = time.Duration(math.MaxInt64)
-	defaultClientKeepaliveTime    = infinity
-	defaultClientKeepaliveTimeout = time.Duration(20 * time.Second)
-	defaultMaxStreamsClient       = 100
-	defaultMaxConnectionIdle      = infinity
-	defaultMaxConnectionAge       = infinity
-	defaultMaxConnectionAgeGrace  = infinity
-	defaultServerKeepaliveTime    = time.Duration(2 * time.Hour)
-	defaultServerKeepaliveTimeout = time.Duration(20 * time.Second)
-	defaultKeepalivePolicyMinTime = time.Duration(5 * time.Minute)
+	initialWindowSize     = defaultWindowSize      // for an RPC
+	initialConnWindowSize = defaultWindowSize * 16 // for a connection
 )
 
 // The following defines various control items which could flow through
@@ -85,8 +73,6 @@ type resetStream struct {
 func (*resetStream) item() {}
 
 type goAway struct {
-	code      http2.ErrCode
-	debugData []byte
 }
 
 func (*goAway) item() {}

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

@@ -53,7 +53,6 @@ import (
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
-	"google.golang.org/grpc/status"
 )
 
 // NewServerHandlerTransport returns a ServerTransport handling gRPC
@@ -183,7 +182,7 @@ func (ht *serverHandlerTransport) do(fn func()) error {
 	}
 }
 
-func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) error {
+func (ht *serverHandlerTransport) WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error {
 	err := ht.do(func() {
 		ht.writeCommonHeaders(s)
 
@@ -193,13 +192,10 @@ func (ht *serverHandlerTransport) WriteStatus(s *Stream, st *status.Status) erro
 		ht.rw.(http.Flusher).Flush()
 
 		h := ht.rw.Header()
-		h.Set("Grpc-Status", fmt.Sprintf("%d", st.Code()))
-		if m := st.Message(); m != "" {
-			h.Set("Grpc-Message", encodeGrpcMessage(m))
+		h.Set("Grpc-Status", fmt.Sprintf("%d", statusCode))
+		if statusDesc != "" {
+			h.Set("Grpc-Message", encodeGrpcMessage(statusDesc))
 		}
-
-		// TODO: Support Grpc-Status-Details-Bin
-
 		if md := s.Trailer(); len(md) > 0 {
 			for k, vv := range md {
 				// Clients don't tolerate reading restricted headers after some non restricted ones were sent.
@@ -238,7 +234,6 @@ func (ht *serverHandlerTransport) writeCommonHeaders(s *Stream) {
 	// and https://golang.org/pkg/net/http/#example_ResponseWriter_trailers
 	h.Add("Trailer", "Grpc-Status")
 	h.Add("Trailer", "Grpc-Message")
-	// TODO: Support Grpc-Status-Details-Bin
 
 	if s.sendCompress != "" {
 		h.Set("Grpc-Encoding", s.sendCompress)
@@ -319,7 +314,7 @@ func (ht *serverHandlerTransport) HandleStreams(startStream func(*Stream), trace
 	if req.TLS != nil {
 		pr.AuthInfo = credentials.TLSInfo{State: *req.TLS}
 	}
-	ctx = metadata.NewIncomingContext(ctx, ht.headerMD)
+	ctx = metadata.NewContext(ctx, ht.headerMD)
 	ctx = peer.NewContext(ctx, pr)
 	s.ctx = newContextWithStream(ctx, s)
 	s.dec = &recvBufferReader{ctx: s.ctx, recv: s.buf}

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

@@ -44,17 +44,16 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/golang/protobuf/proto"
 	"golang.org/x/net/http2"
 	"golang.org/x/net/http2/hpack"
-	spb "google.golang.org/genproto/googleapis/rpc/status"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/grpclog"
 	"google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/status"
 )
 
 const (
+	// The primary user agent
+	primaryUA = "grpc-go/1.0"
 	// http2MaxFrameLen specifies the max length of a HTTP2 frame.
 	http2MaxFrameLen = 16384 // 16KB frame
 	// http://http2.github.io/http2-spec/#SettingValues
@@ -93,15 +92,13 @@ var (
 // Records the states during HPACK decoding. Must be reset once the
 // decoding of the entire headers are finished.
 type decodeState struct {
+	err error // first error encountered decoding
+
 	encoding string
-	// statusGen caches the stream status received from the trailer the server
-	// sent.  Client side only.  Do not access directly.  After all trailers are
-	// parsed, use the status method to retrieve the status.
-	statusGen *status.Status
-	// rawStatusCode and rawStatusMsg are set from the raw trailer fields and are not
-	// intended for direct access outside of parsing.
-	rawStatusCode int32
-	rawStatusMsg  string
+	// statusCode caches the stream status received from the trailer
+	// the server sent. Client side only.
+	statusCode codes.Code
+	statusDesc string
 	// Server side only fields.
 	timeoutSet bool
 	timeout    time.Duration
@@ -124,7 +121,6 @@ func isReservedHeader(hdr string) bool {
 		"grpc-message",
 		"grpc-status",
 		"grpc-timeout",
-		"grpc-status-details-bin",
 		"te":
 		return true
 	default:
@@ -143,6 +139,12 @@ func isWhitelistedPseudoHeader(hdr string) bool {
 	}
 }
 
+func (d *decodeState) setErr(err error) {
+	if d.err == nil {
+		d.err = err
+	}
+}
+
 func validContentType(t string) bool {
 	e := "application/grpc"
 	if !strings.HasPrefix(t, e) {
@@ -156,62 +158,56 @@ func validContentType(t string) bool {
 	return true
 }
 
-func (d *decodeState) status() *status.Status {
-	if d.statusGen == nil {
-		// No status-details were provided; generate status using code/msg.
-		d.statusGen = status.New(codes.Code(d.rawStatusCode), d.rawStatusMsg)
-	}
-	return d.statusGen
-}
-
-func (d *decodeState) processHeaderField(f hpack.HeaderField) error {
+func (d *decodeState) processHeaderField(f hpack.HeaderField) {
 	switch f.Name {
 	case "content-type":
 		if !validContentType(f.Value) {
-			return streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value)
+			d.setErr(streamErrorf(codes.FailedPrecondition, "transport: received the unexpected content-type %q", f.Value))
+			return
 		}
 	case "grpc-encoding":
 		d.encoding = f.Value
 	case "grpc-status":
 		code, err := strconv.Atoi(f.Value)
 		if err != nil {
-			return streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err)
+			d.setErr(streamErrorf(codes.Internal, "transport: malformed grpc-status: %v", err))
+			return
 		}
-		d.rawStatusCode = int32(code)
+		d.statusCode = codes.Code(code)
 	case "grpc-message":
-		d.rawStatusMsg = decodeGrpcMessage(f.Value)
-	case "grpc-status-details-bin":
-		_, v, err := metadata.DecodeKeyValue("grpc-status-details-bin", f.Value)
-		if err != nil {
-			return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
-		}
-		s := &spb.Status{}
-		if err := proto.Unmarshal([]byte(v), s); err != nil {
-			return streamErrorf(codes.Internal, "transport: malformed grpc-status-details-bin: %v", err)
-		}
-		d.statusGen = status.FromProto(s)
+		d.statusDesc = decodeGrpcMessage(f.Value)
 	case "grpc-timeout":
 		d.timeoutSet = true
 		var err error
-		if d.timeout, err = decodeTimeout(f.Value); err != nil {
-			return streamErrorf(codes.Internal, "transport: malformed time-out: %v", err)
+		d.timeout, err = decodeTimeout(f.Value)
+		if err != nil {
+			d.setErr(streamErrorf(codes.Internal, "transport: malformed time-out: %v", err))
+			return
 		}
 	case ":path":
 		d.method = f.Value
 	default:
 		if !isReservedHeader(f.Name) || isWhitelistedPseudoHeader(f.Name) {
+			if f.Name == "user-agent" {
+				i := strings.LastIndex(f.Value, " ")
+				if i == -1 {
+					// There is no application user agent string being set.
+					return
+				}
+				// Extract the application user agent string.
+				f.Value = f.Value[:i]
+			}
 			if d.mdata == nil {
 				d.mdata = make(map[string][]string)
 			}
 			k, v, err := metadata.DecodeKeyValue(f.Name, f.Value)
 			if err != nil {
 				grpclog.Printf("Failed to decode (%q, %q): %v", f.Name, f.Value, err)
-				return nil
+				return
 			}
 			d.mdata[k] = append(d.mdata[k], v)
 		}
 	}
-	return nil
 }
 
 type timeoutUnit uint8
@@ -383,9 +379,6 @@ func newFramer(conn net.Conn) *framer {
 		writer: bufio.NewWriterSize(conn, http2IOBufSize),
 	}
 	f.fr = http2.NewFramer(f.writer, f.reader)
-	// Opt-in to Frame reuse API on framer to reduce garbage.
-	// Frames aren't safe to read from after a subsequent call to ReadFrame.
-	f.fr.SetReuseFrames()
 	f.fr.ReadMetaHeaders = hpack.NewDecoder(http2InitHeaderTableSize, nil)
 	return f
 }

go/vendor/google.golang.org/grpc/transport/pre_go16.go

+// +build !go1.6
+
+/*
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package transport
+
+import (
+	"net"
+	"time"
+
+	"golang.org/x/net/context"
+)
+
+// dialContext connects to the address on the named network.
+func dialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	var dialer net.Dialer
+	if deadline, ok := ctx.Deadline(); ok {
+		dialer.Timeout = deadline.Sub(time.Now())
+	}
+	return dialer.Dial(network, address)
+}

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

@@ -45,13 +45,10 @@ import (
 	"sync"
 
 	"golang.org/x/net/context"
-	"golang.org/x/net/http2"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
-	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/stats"
-	"google.golang.org/grpc/status"
 	"google.golang.org/grpc/tap"
 )
 
@@ -213,13 +210,9 @@ type Stream struct {
 	// true iff headerChan is closed. Used to avoid closing headerChan
 	// multiple times.
 	headerDone bool
-	// the status error received from the server.
-	status *status.Status
-	// rstStream indicates whether a RST_STREAM frame needs to be sent
-	// to the server to signify that this stream is closing.
-	rstStream bool
-	// rstError is the error that needs to be sent along with the RST_STREAM frame.
-	rstError http2.ErrCode
+	// the status received from the server.
+	statusCode codes.Code
+	statusDesc string
 }
 
 // RecvCompress returns the compression algorithm applied to the inbound
@@ -284,9 +277,14 @@ func (s *Stream) Method() string {
 	return s.method
 }
 
-// Status returns the status received from the server.
-func (s *Stream) Status() *status.Status {
-	return s.status
+// StatusCode returns statusCode received from the server.
+func (s *Stream) StatusCode() codes.Code {
+	return s.statusCode
+}
+
+// StatusDesc returns statusDesc received from the server.
+func (s *Stream) StatusDesc() string {
+	return s.statusDesc
 }
 
 // SetHeader sets the header metadata. This can be called multiple times.
@@ -333,20 +331,6 @@ func (s *Stream) Read(p []byte) (n int, err error) {
 	return
 }
 
-// finish sets the stream's state and status, and closes the done channel.
-// s.mu must be held by the caller.  st must always be non-nil.
-func (s *Stream) finish(st *status.Status) {
-	s.status = st
-	s.state = streamDone
-	close(s.done)
-}
-
-// GoString is implemented by Stream so context.String() won't
-// race when printing %#v.
-func (s *Stream) GoString() string {
-	return fmt.Sprintf("<stream: %p, %v>", s, s.method)
-}
-
 // The key to save transport.Stream in the context.
 type streamKey struct{}
 
@@ -374,12 +358,10 @@ const (
 
 // ServerConfig consists of all the configurations to establish a server transport.
 type ServerConfig struct {
-	MaxStreams      uint32
-	AuthInfo        credentials.AuthInfo
-	InTapHandle     tap.ServerInHandle
-	StatsHandler    stats.Handler
-	KeepaliveParams keepalive.ServerParameters
-	KeepalivePolicy keepalive.EnforcementPolicy
+	MaxStreams   uint32
+	AuthInfo     credentials.AuthInfo
+	InTapHandle  tap.ServerInHandle
+	StatsHandler stats.Handler
 }
 
 // NewServerTransport creates a ServerTransport with conn or non-nil error
@@ -392,9 +374,6 @@ func NewServerTransport(protocol string, conn net.Conn, config *ServerConfig) (S
 type ConnectOptions struct {
 	// UserAgent is the application user agent.
 	UserAgent string
-	// Authority is the :authority pseudo-header to use. This field has no effect if
-	// TransportCredentials is set.
-	Authority string
 	// Dialer specifies how to dial a network address.
 	Dialer func(context.Context, string) (net.Conn, error)
 	// FailOnNonTempDialError specifies if gRPC fails on non-temporary dial errors.
@@ -403,8 +382,6 @@ type ConnectOptions struct {
 	PerRPCCredentials []credentials.PerRPCCredentials
 	// TransportCredentials stores the Authenticator required to setup a client connection.
 	TransportCredentials credentials.TransportCredentials
-	// KeepaliveParams stores the keepalive parameters.
-	KeepaliveParams keepalive.ClientParameters
 	// StatsHandler stores the handler for stats.
 	StatsHandler stats.Handler
 }
@@ -493,9 +470,6 @@ type ClientTransport interface {
 	// receives the draining signal from the server (e.g., GOAWAY frame in
 	// HTTP/2).
 	GoAway() <-chan struct{}
-
-	// GetGoAwayReason returns the reason why GoAway frame was received.
-	GetGoAwayReason() GoAwayReason
 }
 
 // ServerTransport is the common interface for all gRPC server-side transport
@@ -515,9 +489,10 @@ type ServerTransport interface {
 	// Write may not be called on all streams.
 	Write(s *Stream, data []byte, opts *Options) error
 
-	// WriteStatus sends the status of a stream to the client.  WriteStatus is
-	// the final call made on a stream and always occurs.
-	WriteStatus(s *Stream, st *status.Status) error
+	// WriteStatus sends the status of a stream to the client.
+	// WriteStatus is the final call made on a stream and always
+	// occurs.
+	WriteStatus(s *Stream, statusCode codes.Code, statusDesc string) error
 
 	// Close tears down the transport. Once it is called, the transport
 	// should not be accessed any more. All the pending streams and their
@@ -583,8 +558,6 @@ var (
 	ErrStreamDrain = streamErrorf(codes.Unavailable, "the server stops accepting new RPCs")
 )
 
-// TODO: See if we can replace StreamError with status package errors.
-
 // StreamError is an error that only affects one stream within a connection.
 type StreamError struct {
 	Code codes.Code
@@ -592,7 +565,7 @@ type StreamError struct {
 }
 
 func (e StreamError) Error() string {
-	return fmt.Sprintf("stream error: code = %s desc = %q", e.Code, e.Desc)
+	return fmt.Sprintf("stream error: code = %d desc = %q", e.Code, e.Desc)
 }
 
 // ContextErr converts the error from context package into a StreamError.
@@ -633,16 +606,3 @@ func wait(ctx context.Context, done, goAway, closing <-chan struct{}, proceed <-
 		return i, nil
 	}
 }
-
-// GoAwayReason contains the reason for the GoAway frame received.
-type GoAwayReason uint8
-
-const (
-	// Invalid indicates that no GoAway frame is received.
-	Invalid GoAwayReason = 0
-	// NoReason is the default value when GoAway frame is received.
-	NoReason GoAwayReason = 1
-	// TooManyPings indicates that a GoAway frame with ErrCodeEnhanceYourCalm
-	// was recieved and that the debug data said "too_many_pings".
-	TooManyPings GoAwayReason = 2
-)

go/vendor/vendor.json

@@ -132,10 +132,10 @@
 			"revisionTime": "2017-04-04T13:20:09Z"
 		},
 		{
-			"checksumSHA1": "tidJMmntKTZuU196aiLojkULL+g=",
+			"checksumSHA1": "epHwh7hDQSYzDowPIbw8vnLzPS0=",
 			"path": "google.golang.org/grpc",
-			"revision": "6d158dbf32084eac5fc0b9ea6f1feed214290ec6",
-			"revisionTime": "2017-04-12T06:39:30Z"
+			"revision": "50955793b0183f9de69bd78e2ec251cf20aab121",
+			"revisionTime": "2017-01-11T19:10:52Z"
 		},
 		{
 			"checksumSHA1": "08icuA15HRkdYCt6H+Cs90RPQsY=",
@@ -204,10 +204,10 @@
 			"revisionTime": "2017-04-12T06:39:30Z"
 		},
 		{
-			"checksumSHA1": "WMlN+OrgFM70j2/AoMh6DM6NtK8=",
+			"checksumSHA1": "yHpUeGwKoqqwd3cbEp3lkcnvft0=",
 			"path": "google.golang.org/grpc/transport",
-			"revision": "6d158dbf32084eac5fc0b9ea6f1feed214290ec6",
-			"revisionTime": "2017-04-12T06:39:30Z"
+			"revision": "50955793b0183f9de69bd78e2ec251cf20aab121",
+			"revisionTime": "2017-01-11T19:10:52Z"
 		},
 		{
 			"checksumSHA1": "fALlQNY1fM99NesfLJ50KguWsio=",