TUN-528: Move cloudflared into a separate repo

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/README.md

@@ -0,0 +1,57 @@
+# OpenTracing support for gRPC in Go
+
+The `otgrpc` package makes it easy to add OpenTracing support to gRPC-based
+systems in Go.
+
+## Installation
+
+```
+go get github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc
+```
+
+## Documentation
+
+See the basic usage examples below and the [package documentation on
+godoc.org](https://godoc.org/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc).
+
+## Client-side usage example
+
+Wherever you call `grpc.Dial`:
+
+```go
+// You must have some sort of OpenTracing Tracer instance on hand.
+var tracer opentracing.Tracer = ...
+...
+
+// Set up a connection to the server peer.
+conn, err := grpc.Dial(
+    address,
+    ... // other options
+    grpc.WithUnaryInterceptor(
+        otgrpc.OpenTracingClientInterceptor(tracer)),
+    grpc.WithStreamInterceptor(
+        otgrpc.OpenTracingStreamClientInterceptor(tracer)))
+
+// All future RPC activity involving `conn` will be automatically traced.
+```
+
+## Server-side usage example
+
+Wherever you call `grpc.NewServer`:
+
+```go
+// You must have some sort of OpenTracing Tracer instance on hand.
+var tracer opentracing.Tracer = ...
+...
+
+// Initialize the gRPC server.
+s := grpc.NewServer(
+    ... // other options
+    grpc.UnaryInterceptor(
+        otgrpc.OpenTracingServerInterceptor(tracer)),
+    grpc.StreamInterceptor(
+        otgrpc.OpenTracingStreamServerInterceptor(tracer)))
+
+// All future RPC activity involving `s` will be automatically traced.
+```
+

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/client.go

@@ -0,0 +1,239 @@
+package otgrpc
+
+import (
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/opentracing/opentracing-go/log"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+	"io"
+	"runtime"
+	"sync/atomic"
+)
+
+// OpenTracingClientInterceptor returns a grpc.UnaryClientInterceptor suitable
+// for use in a grpc.Dial call.
+//
+// For example:
+//
+//     conn, err := grpc.Dial(
+//         address,
+//         ...,  // (existing DialOptions)
+//         grpc.WithUnaryInterceptor(otgrpc.OpenTracingClientInterceptor(tracer)))
+//
+// All gRPC client spans will inject the OpenTracing SpanContext into the gRPC
+// metadata; they will also look in the context.Context for an active
+// in-process parent Span and establish a ChildOf reference if such a parent
+// Span could be found.
+func OpenTracingClientInterceptor(tracer opentracing.Tracer, optFuncs ...Option) grpc.UnaryClientInterceptor {
+	otgrpcOpts := newOptions()
+	otgrpcOpts.apply(optFuncs...)
+	return func(
+		ctx context.Context,
+		method string,
+		req, resp interface{},
+		cc *grpc.ClientConn,
+		invoker grpc.UnaryInvoker,
+		opts ...grpc.CallOption,
+	) error {
+		var err error
+		var parentCtx opentracing.SpanContext
+		if parent := opentracing.SpanFromContext(ctx); parent != nil {
+			parentCtx = parent.Context()
+		}
+		if otgrpcOpts.inclusionFunc != nil &&
+			!otgrpcOpts.inclusionFunc(parentCtx, method, req, resp) {
+			return invoker(ctx, method, req, resp, cc, opts...)
+		}
+		clientSpan := tracer.StartSpan(
+			method,
+			opentracing.ChildOf(parentCtx),
+			ext.SpanKindRPCClient,
+			gRPCComponentTag,
+		)
+		defer clientSpan.Finish()
+		ctx = injectSpanContext(ctx, tracer, clientSpan)
+		if otgrpcOpts.logPayloads {
+			clientSpan.LogFields(log.Object("gRPC request", req))
+		}
+		err = invoker(ctx, method, req, resp, cc, opts...)
+		if err == nil {
+			if otgrpcOpts.logPayloads {
+				clientSpan.LogFields(log.Object("gRPC response", resp))
+			}
+		} else {
+			SetSpanTags(clientSpan, err, true)
+			clientSpan.LogFields(log.String("event", "error"), log.String("message", err.Error()))
+		}
+		if otgrpcOpts.decorator != nil {
+			otgrpcOpts.decorator(clientSpan, method, req, resp, err)
+		}
+		return err
+	}
+}
+
+// OpenTracingStreamClientInterceptor returns a grpc.StreamClientInterceptor suitable
+// for use in a grpc.Dial call. The interceptor instruments streaming RPCs by creating
+// a single span to correspond to the lifetime of the RPC's stream.
+//
+// For example:
+//
+//     conn, err := grpc.Dial(
+//         address,
+//         ...,  // (existing DialOptions)
+//         grpc.WithStreamInterceptor(otgrpc.OpenTracingStreamClientInterceptor(tracer)))
+//
+// All gRPC client spans will inject the OpenTracing SpanContext into the gRPC
+// metadata; they will also look in the context.Context for an active
+// in-process parent Span and establish a ChildOf reference if such a parent
+// Span could be found.
+func OpenTracingStreamClientInterceptor(tracer opentracing.Tracer, optFuncs ...Option) grpc.StreamClientInterceptor {
+	otgrpcOpts := newOptions()
+	otgrpcOpts.apply(optFuncs...)
+	return func(
+		ctx context.Context,
+		desc *grpc.StreamDesc,
+		cc *grpc.ClientConn,
+		method string,
+		streamer grpc.Streamer,
+		opts ...grpc.CallOption,
+	) (grpc.ClientStream, error) {
+		var err error
+		var parentCtx opentracing.SpanContext
+		if parent := opentracing.SpanFromContext(ctx); parent != nil {
+			parentCtx = parent.Context()
+		}
+		if otgrpcOpts.inclusionFunc != nil &&
+			!otgrpcOpts.inclusionFunc(parentCtx, method, nil, nil) {
+			return streamer(ctx, desc, cc, method, opts...)
+		}
+
+		clientSpan := tracer.StartSpan(
+			method,
+			opentracing.ChildOf(parentCtx),
+			ext.SpanKindRPCClient,
+			gRPCComponentTag,
+		)
+		ctx = injectSpanContext(ctx, tracer, clientSpan)
+		cs, err := streamer(ctx, desc, cc, method, opts...)
+		if err != nil {
+			clientSpan.LogFields(log.String("event", "error"), log.String("message", err.Error()))
+			SetSpanTags(clientSpan, err, true)
+			clientSpan.Finish()
+			return cs, err
+		}
+		return newOpenTracingClientStream(cs, method, desc, clientSpan, otgrpcOpts), nil
+	}
+}
+
+func newOpenTracingClientStream(cs grpc.ClientStream, method string, desc *grpc.StreamDesc, clientSpan opentracing.Span, otgrpcOpts *options) grpc.ClientStream {
+	finishChan := make(chan struct{})
+
+	isFinished := new(int32)
+	*isFinished = 0
+	finishFunc := func(err error) {
+		// The current OpenTracing specification forbids finishing a span more than
+		// once. Since we have multiple code paths that could concurrently call
+		// `finishFunc`, we need to add some sort of synchronization to guard against
+		// multiple finishing.
+		if !atomic.CompareAndSwapInt32(isFinished, 0, 1) {
+			return
+		}
+		close(finishChan)
+		defer clientSpan.Finish()
+		if err != nil {
+			clientSpan.LogFields(log.String("event", "error"), log.String("message", err.Error()))
+			SetSpanTags(clientSpan, err, true)
+		}
+		if otgrpcOpts.decorator != nil {
+			otgrpcOpts.decorator(clientSpan, method, nil, nil, err)
+		}
+	}
+	go func() {
+		select {
+		case <-finishChan:
+			// The client span is being finished by another code path; hence, no
+			// action is necessary.
+		case <-cs.Context().Done():
+			finishFunc(cs.Context().Err())
+		}
+	}()
+	otcs := &openTracingClientStream{
+		ClientStream: cs,
+		desc:         desc,
+		finishFunc:   finishFunc,
+	}
+
+	// The `ClientStream` interface allows one to omit calling `Recv` if it's
+	// known that the result will be `io.EOF`. See
+	// http://stackoverflow.com/q/42915337
+	// In such cases, there's nothing that triggers the span to finish. We,
+	// therefore, set a finalizer so that the span and the context goroutine will
+	// at least be cleaned up when the garbage collector is run.
+	runtime.SetFinalizer(otcs, func(otcs *openTracingClientStream) {
+		otcs.finishFunc(nil)
+	})
+	return otcs
+}
+
+type openTracingClientStream struct {
+	grpc.ClientStream
+	desc       *grpc.StreamDesc
+	finishFunc func(error)
+}
+
+func (cs *openTracingClientStream) Header() (metadata.MD, error) {
+	md, err := cs.ClientStream.Header()
+	if err != nil {
+		cs.finishFunc(err)
+	}
+	return md, err
+}
+
+func (cs *openTracingClientStream) SendMsg(m interface{}) error {
+	err := cs.ClientStream.SendMsg(m)
+	if err != nil {
+		cs.finishFunc(err)
+	}
+	return err
+}
+
+func (cs *openTracingClientStream) RecvMsg(m interface{}) error {
+	err := cs.ClientStream.RecvMsg(m)
+	if err == io.EOF {
+		cs.finishFunc(nil)
+		return err
+	} else if err != nil {
+		cs.finishFunc(err)
+		return err
+	}
+	if !cs.desc.ServerStreams {
+		cs.finishFunc(nil)
+	}
+	return err
+}
+
+func (cs *openTracingClientStream) CloseSend() error {
+	err := cs.ClientStream.CloseSend()
+	if err != nil {
+		cs.finishFunc(err)
+	}
+	return err
+}
+
+func injectSpanContext(ctx context.Context, tracer opentracing.Tracer, clientSpan opentracing.Span) context.Context {
+	md, ok := metadata.FromOutgoingContext(ctx)
+	if !ok {
+		md = metadata.New(nil)
+	} else {
+		md = md.Copy()
+	}
+	mdWriter := metadataReaderWriter{md}
+	err := tracer.Inject(clientSpan.Context(), opentracing.HTTPHeaders, mdWriter)
+	// We have no better place to record an error than the Span itself :-/
+	if err != nil {
+		clientSpan.LogFields(log.String("event", "Tracer.Inject() failed"), log.Error(err))
+	}
+	return metadata.NewOutgoingContext(ctx, md)
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/errors.go

@@ -0,0 +1,69 @@
+package otgrpc
+
+import (
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+// A Class is a set of types of outcomes (including errors) that will often
+// be handled in the same way.
+type Class string
+
+const (
+	Unknown Class = "0xx"
+	// Success represents outcomes that achieved the desired results.
+	Success Class = "2xx"
+	// ClientError represents errors that were the client's fault.
+	ClientError Class = "4xx"
+	// ServerError represents errors that were the server's fault.
+	ServerError Class = "5xx"
+)
+
+// ErrorClass returns the class of the given error
+func ErrorClass(err error) Class {
+	if s, ok := status.FromError(err); ok {
+		switch s.Code() {
+		// Success or "success"
+		case codes.OK, codes.Canceled:
+			return Success
+
+		// Client errors
+		case codes.InvalidArgument, codes.NotFound, codes.AlreadyExists,
+			codes.PermissionDenied, codes.Unauthenticated, codes.FailedPrecondition,
+			codes.OutOfRange:
+			return ClientError
+
+		// Server errors
+		case codes.DeadlineExceeded, codes.ResourceExhausted, codes.Aborted,
+			codes.Unimplemented, codes.Internal, codes.Unavailable, codes.DataLoss:
+			return ServerError
+
+		// Not sure
+		case codes.Unknown:
+			fallthrough
+		default:
+			return Unknown
+		}
+	}
+	return Unknown
+}
+
+// SetSpanTags sets one or more tags on the given span according to the
+// error.
+func SetSpanTags(span opentracing.Span, err error, client bool) {
+	c := ErrorClass(err)
+	code := codes.Unknown
+	if s, ok := status.FromError(err); ok {
+		code = s.Code()
+	}
+	span.SetTag("response_code", code)
+	span.SetTag("response_class", c)
+	if err == nil {
+		return
+	}
+	if client || c == ServerError {
+		ext.Error.Set(span, true)
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/errors_test.go

@@ -0,0 +1,57 @@
+package otgrpc
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/opentracing/opentracing-go/mocktracer"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
+)
+
+const (
+	firstCode = codes.OK
+	lastCode  = codes.DataLoss
+)
+
+func TestSpanTags(t *testing.T) {
+	tracer := mocktracer.New()
+	for code := firstCode; code <= lastCode; code++ {
+		// Client error
+		tracer.Reset()
+		span := tracer.StartSpan("test-trace-client")
+		err := status.Error(code, "")
+		SetSpanTags(span, err, true)
+		span.Finish()
+
+		// Assert added tags
+		rawSpan := tracer.FinishedSpans()[0]
+		expectedTags := map[string]interface{}{
+			"response_code":  code,
+			"response_class": ErrorClass(err),
+		}
+		if err != nil {
+			expectedTags["error"] = true
+		}
+		assert.Equal(t, expectedTags, rawSpan.Tags())
+
+		// Server error
+		tracer.Reset()
+		span = tracer.StartSpan("test-trace-server")
+		err = status.Error(code, "")
+		SetSpanTags(span, err, false)
+		span.Finish()
+
+		// Assert added tags
+		rawSpan = tracer.FinishedSpans()[0]
+		expectedTags = map[string]interface{}{
+			"response_code":  code,
+			"response_class": ErrorClass(err),
+		}
+		if err != nil && ErrorClass(err) == ServerError {
+			expectedTags["error"] = true
+		}
+		assert.Equal(t, expectedTags, rawSpan.Tags())
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/options.go

@@ -0,0 +1,76 @@
+package otgrpc
+
+import "github.com/opentracing/opentracing-go"
+
+// Option instances may be used in OpenTracing(Server|Client)Interceptor
+// initialization.
+//
+// See this post about the "functional options" pattern:
+// http://dave.cheney.net/2014/10/17/functional-options-for-friendly-apis
+type Option func(o *options)
+
+// LogPayloads returns an Option that tells the OpenTracing instrumentation to
+// try to log application payloads in both directions.
+func LogPayloads() Option {
+	return func(o *options) {
+		o.logPayloads = true
+	}
+}
+
+// SpanInclusionFunc provides an optional mechanism to decide whether or not
+// to trace a given gRPC call. Return true to create a Span and initiate
+// tracing, false to not create a Span and not trace.
+//
+// parentSpanCtx may be nil if no parent could be extraction from either the Go
+// context.Context (on the client) or the RPC (on the server).
+type SpanInclusionFunc func(
+	parentSpanCtx opentracing.SpanContext,
+	method string,
+	req, resp interface{}) bool
+
+// IncludingSpans binds a IncludeSpanFunc to the options
+func IncludingSpans(inclusionFunc SpanInclusionFunc) Option {
+	return func(o *options) {
+		o.inclusionFunc = inclusionFunc
+	}
+}
+
+// SpanDecoratorFunc provides an (optional) mechanism for otgrpc users to add
+// arbitrary tags/logs/etc to the opentracing.Span associated with client
+// and/or server RPCs.
+type SpanDecoratorFunc func(
+	span opentracing.Span,
+	method string,
+	req, resp interface{},
+	grpcError error)
+
+// SpanDecorator binds a function that decorates gRPC Spans.
+func SpanDecorator(decorator SpanDecoratorFunc) Option {
+	return func(o *options) {
+		o.decorator = decorator
+	}
+}
+
+// The internal-only options struct. Obviously overkill at the moment; but will
+// scale well as production use dictates other configuration and tuning
+// parameters.
+type options struct {
+	logPayloads bool
+	decorator   SpanDecoratorFunc
+	// May be nil.
+	inclusionFunc SpanInclusionFunc
+}
+
+// newOptions returns the default options.
+func newOptions() *options {
+	return &options{
+		logPayloads:   false,
+		inclusionFunc: nil,
+	}
+}
+
+func (o *options) apply(opts ...Option) {
+	for _, opt := range opts {
+		opt(o)
+	}
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/package.go

@@ -0,0 +1,5 @@
+// Package otgrpc provides OpenTracing support for any gRPC client or server.
+//
+// See the README for simple usage examples:
+// https://github.com/grpc-ecosystem/grpc-opentracing/blob/master/go/otgrpc/README.md
+package otgrpc

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/server.go

@@ -0,0 +1,141 @@
+package otgrpc
+
+import (
+	"github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"github.com/opentracing/opentracing-go/log"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/metadata"
+)
+
+// OpenTracingServerInterceptor returns a grpc.UnaryServerInterceptor suitable
+// for use in a grpc.NewServer call.
+//
+// For example:
+//
+//     s := grpc.NewServer(
+//         ...,  // (existing ServerOptions)
+//         grpc.UnaryInterceptor(otgrpc.OpenTracingServerInterceptor(tracer)))
+//
+// All gRPC server spans will look for an OpenTracing SpanContext in the gRPC
+// metadata; if found, the server span will act as the ChildOf that RPC
+// SpanContext.
+//
+// Root or not, the server Span will be embedded in the context.Context for the
+// application-specific gRPC handler(s) to access.
+func OpenTracingServerInterceptor(tracer opentracing.Tracer, optFuncs ...Option) grpc.UnaryServerInterceptor {
+	otgrpcOpts := newOptions()
+	otgrpcOpts.apply(optFuncs...)
+	return func(
+		ctx context.Context,
+		req interface{},
+		info *grpc.UnaryServerInfo,
+		handler grpc.UnaryHandler,
+	) (resp interface{}, err error) {
+		spanContext, err := extractSpanContext(ctx, tracer)
+		if err != nil && err != opentracing.ErrSpanContextNotFound {
+			// TODO: establish some sort of error reporting mechanism here. We
+			// don't know where to put such an error and must rely on Tracer
+			// implementations to do something appropriate for the time being.
+		}
+		if otgrpcOpts.inclusionFunc != nil &&
+			!otgrpcOpts.inclusionFunc(spanContext, info.FullMethod, req, nil) {
+			return handler(ctx, req)
+		}
+		serverSpan := tracer.StartSpan(
+			info.FullMethod,
+			ext.RPCServerOption(spanContext),
+			gRPCComponentTag,
+		)
+		defer serverSpan.Finish()
+
+		ctx = opentracing.ContextWithSpan(ctx, serverSpan)
+		if otgrpcOpts.logPayloads {
+			serverSpan.LogFields(log.Object("gRPC request", req))
+		}
+		resp, err = handler(ctx, req)
+		if err == nil {
+			if otgrpcOpts.logPayloads {
+				serverSpan.LogFields(log.Object("gRPC response", resp))
+			}
+		} else {
+			SetSpanTags(serverSpan, err, false)
+			serverSpan.LogFields(log.String("event", "error"), log.String("message", err.Error()))
+		}
+		if otgrpcOpts.decorator != nil {
+			otgrpcOpts.decorator(serverSpan, info.FullMethod, req, resp, err)
+		}
+		return resp, err
+	}
+}
+
+// OpenTracingStreamServerInterceptor returns a grpc.StreamServerInterceptor suitable
+// for use in a grpc.NewServer call. The interceptor instruments streaming RPCs by
+// creating a single span to correspond to the lifetime of the RPC's stream.
+//
+// For example:
+//
+//     s := grpc.NewServer(
+//         ...,  // (existing ServerOptions)
+//         grpc.StreamInterceptor(otgrpc.OpenTracingStreamServerInterceptor(tracer)))
+//
+// All gRPC server spans will look for an OpenTracing SpanContext in the gRPC
+// metadata; if found, the server span will act as the ChildOf that RPC
+// SpanContext.
+//
+// Root or not, the server Span will be embedded in the context.Context for the
+// application-specific gRPC handler(s) to access.
+func OpenTracingStreamServerInterceptor(tracer opentracing.Tracer, optFuncs ...Option) grpc.StreamServerInterceptor {
+	otgrpcOpts := newOptions()
+	otgrpcOpts.apply(optFuncs...)
+	return func(srv interface{}, ss grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
+		spanContext, err := extractSpanContext(ss.Context(), tracer)
+		if err != nil && err != opentracing.ErrSpanContextNotFound {
+			// TODO: establish some sort of error reporting mechanism here. We
+			// don't know where to put such an error and must rely on Tracer
+			// implementations to do something appropriate for the time being.
+		}
+		if otgrpcOpts.inclusionFunc != nil &&
+			!otgrpcOpts.inclusionFunc(spanContext, info.FullMethod, nil, nil) {
+			return handler(srv, ss)
+		}
+
+		serverSpan := tracer.StartSpan(
+			info.FullMethod,
+			ext.RPCServerOption(spanContext),
+			gRPCComponentTag,
+		)
+		defer serverSpan.Finish()
+		ss = &openTracingServerStream{
+			ServerStream: ss,
+			ctx:          opentracing.ContextWithSpan(ss.Context(), serverSpan),
+		}
+		err = handler(srv, ss)
+		if err != nil {
+			SetSpanTags(serverSpan, err, false)
+			serverSpan.LogFields(log.String("event", "error"), log.String("message", err.Error()))
+		}
+		if otgrpcOpts.decorator != nil {
+			otgrpcOpts.decorator(serverSpan, info.FullMethod, nil, nil, err)
+		}
+		return err
+	}
+}
+
+type openTracingServerStream struct {
+	grpc.ServerStream
+	ctx context.Context
+}
+
+func (ss *openTracingServerStream) Context() context.Context {
+	return ss.ctx
+}
+
+func extractSpanContext(ctx context.Context, tracer opentracing.Tracer) (opentracing.SpanContext, error) {
+	md, ok := metadata.FromIncomingContext(ctx)
+	if !ok {
+		md = metadata.New(nil)
+	}
+	return tracer.Extract(opentracing.HTTPHeaders, metadataReaderWriter{md})
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/shared.go

@@ -0,0 +1,42 @@
+package otgrpc
+
+import (
+	"strings"
+
+	opentracing "github.com/opentracing/opentracing-go"
+	"github.com/opentracing/opentracing-go/ext"
+	"google.golang.org/grpc/metadata"
+)
+
+var (
+	// Morally a const:
+	gRPCComponentTag = opentracing.Tag{string(ext.Component), "gRPC"}
+)
+
+// metadataReaderWriter satisfies both the opentracing.TextMapReader and
+// opentracing.TextMapWriter interfaces.
+type metadataReaderWriter struct {
+	metadata.MD
+}
+
+func (w metadataReaderWriter) Set(key, val string) {
+	// The GRPC HPACK implementation rejects any uppercase keys here.
+	//
+	// As such, since the HTTP_HEADERS format is case-insensitive anyway, we
+	// blindly lowercase the key (which is guaranteed to work in the
+	// Inject/Extract sense per the OpenTracing spec).
+	key = strings.ToLower(key)
+	w.MD[key] = append(w.MD[key], val)
+}
+
+func (w metadataReaderWriter) ForeachKey(handler func(key, val string) error) error {
+	for k, vals := range w.MD {
+		for _, v := range vals {
+			if err := handler(k, v); err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/test/interceptor_test.go

@@ -0,0 +1,270 @@
+package interceptor_test
+
+import (
+	"io"
+	"net"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc"
+	testpb "github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/test/otgrpc_testing"
+	"github.com/opentracing/opentracing-go/mocktracer"
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+)
+
+const (
+	streamLength = 5
+)
+
+type testServer struct{}
+
+func (s *testServer) UnaryCall(ctx context.Context, in *testpb.SimpleRequest) (*testpb.SimpleResponse, error) {
+	return &testpb.SimpleResponse{in.Payload}, nil
+}
+
+func (s *testServer) StreamingOutputCall(in *testpb.SimpleRequest, stream testpb.TestService_StreamingOutputCallServer) error {
+	for i := 0; i < streamLength; i++ {
+		if err := stream.Send(&testpb.SimpleResponse{in.Payload}); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s *testServer) StreamingInputCall(stream testpb.TestService_StreamingInputCallServer) error {
+	sum := int32(0)
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+		sum += in.Payload
+	}
+	return stream.SendAndClose(&testpb.SimpleResponse{sum})
+}
+
+func (s *testServer) StreamingBidirectionalCall(stream testpb.TestService_StreamingBidirectionalCallServer) error {
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		if err = stream.Send(&testpb.SimpleResponse{in.Payload}); err != nil {
+			return err
+		}
+	}
+}
+
+type env struct {
+	unaryClientInt  grpc.UnaryClientInterceptor
+	streamClientInt grpc.StreamClientInterceptor
+	unaryServerInt  grpc.UnaryServerInterceptor
+	streamServerInt grpc.StreamServerInterceptor
+}
+
+type test struct {
+	t   *testing.T
+	e   env
+	srv *grpc.Server
+	cc  *grpc.ClientConn
+	c   testpb.TestServiceClient
+}
+
+func newTest(t *testing.T, e env) *test {
+	te := &test{
+		t: t,
+		e: e,
+	}
+
+	// Set up the server.
+	sOpts := []grpc.ServerOption{}
+	if e.unaryServerInt != nil {
+		sOpts = append(sOpts, grpc.UnaryInterceptor(e.unaryServerInt))
+	}
+	if e.streamServerInt != nil {
+		sOpts = append(sOpts, grpc.StreamInterceptor(e.streamServerInt))
+	}
+	lis, err := net.Listen("tcp", "localhost:0")
+	if err != nil {
+		te.t.Fatalf("Failed to listen: %v", err)
+	}
+	te.srv = grpc.NewServer(sOpts...)
+	testpb.RegisterTestServiceServer(te.srv, &testServer{})
+	go te.srv.Serve(lis)
+
+	// Set up a connection to the server.
+	cOpts := []grpc.DialOption{grpc.WithInsecure()}
+	if e.unaryClientInt != nil {
+		cOpts = append(cOpts, grpc.WithUnaryInterceptor(e.unaryClientInt))
+	}
+	if e.streamClientInt != nil {
+		cOpts = append(cOpts, grpc.WithStreamInterceptor(e.streamClientInt))
+	}
+	_, port, err := net.SplitHostPort(lis.Addr().String())
+	if err != nil {
+		te.t.Fatalf("Failed to parse listener address: %v", err)
+	}
+	srvAddr := "localhost:" + port
+	te.cc, err = grpc.Dial(srvAddr, cOpts...)
+	if err != nil {
+		te.t.Fatalf("Dial(%q) = %v", srvAddr, err)
+	}
+	te.c = testpb.NewTestServiceClient(te.cc)
+	return te
+}
+
+func (te *test) tearDown() {
+	te.cc.Close()
+}
+
+func assertChildParentSpans(t *testing.T, tracer *mocktracer.MockTracer) {
+	spans := tracer.FinishedSpans()
+	assert.Equal(t, 2, len(spans))
+	if len(spans) != 2 {
+		t.Fatalf("Incorrect span length")
+	}
+	parent := spans[1]
+	child := spans[0]
+	assert.Equal(t, child.ParentID, parent.Context().(mocktracer.MockSpanContext).SpanID)
+}
+
+func TestUnaryOpenTracing(t *testing.T) {
+	tracer := mocktracer.New()
+	e := env{
+		unaryClientInt: otgrpc.OpenTracingClientInterceptor(tracer),
+		unaryServerInt: otgrpc.OpenTracingServerInterceptor(tracer),
+	}
+	te := newTest(t, e)
+	defer te.tearDown()
+
+	payload := int32(0)
+	resp, err := te.c.UnaryCall(context.Background(), &testpb.SimpleRequest{payload})
+	if err != nil {
+		t.Fatalf("Failed UnaryCall: %v", err)
+	}
+	assert.Equal(t, payload, resp.Payload)
+	assertChildParentSpans(t, tracer)
+}
+
+func TestStreamingOutputCallOpenTracing(t *testing.T) {
+	tracer := mocktracer.New()
+	e := env{
+		streamClientInt: otgrpc.OpenTracingStreamClientInterceptor(tracer),
+		streamServerInt: otgrpc.OpenTracingStreamServerInterceptor(tracer),
+	}
+	te := newTest(t, e)
+	defer te.tearDown()
+
+	payload := int32(0)
+	stream, err := te.c.StreamingOutputCall(context.Background(), &testpb.SimpleRequest{payload})
+	if err != nil {
+		t.Fatalf("Failed StreamingOutputCall: %v", err)
+	}
+	for {
+		resp, err := stream.Recv()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatalf("Failed StreamingOutputCall: %v", err)
+		}
+		assert.Equal(t, payload, resp.Payload)
+	}
+	assertChildParentSpans(t, tracer)
+}
+
+func TestStreamingInputCallOpenTracing(t *testing.T) {
+	tracer := mocktracer.New()
+	e := env{
+		streamClientInt: otgrpc.OpenTracingStreamClientInterceptor(tracer),
+		streamServerInt: otgrpc.OpenTracingStreamServerInterceptor(tracer),
+	}
+	te := newTest(t, e)
+	defer te.tearDown()
+
+	payload := int32(1)
+	stream, err := te.c.StreamingInputCall(context.Background())
+	for i := 0; i < streamLength; i++ {
+		if err = stream.Send(&testpb.SimpleRequest{payload}); err != nil {
+			t.Fatalf("Failed StreamingInputCall: %v", err)
+		}
+	}
+	resp, err := stream.CloseAndRecv()
+	if err != nil {
+		t.Fatalf("Failed StreamingInputCall: %v", err)
+	}
+	assert.Equal(t, streamLength*payload, resp.Payload)
+	assertChildParentSpans(t, tracer)
+}
+
+func TestStreamingBidirectionalCallOpenTracing(t *testing.T) {
+	tracer := mocktracer.New()
+	e := env{
+		streamClientInt: otgrpc.OpenTracingStreamClientInterceptor(tracer),
+		streamServerInt: otgrpc.OpenTracingStreamServerInterceptor(tracer),
+	}
+	te := newTest(t, e)
+	defer te.tearDown()
+
+	payload := int32(0)
+	stream, err := te.c.StreamingBidirectionalCall(context.Background())
+	if err != nil {
+		t.Fatalf("Failed StreamingInputCall: %v", err)
+	}
+	go func() {
+		for i := 0; i < streamLength; i++ {
+			if err := stream.Send(&testpb.SimpleRequest{payload}); err != nil {
+				t.Fatalf("Failed StreamingInputCall: %v", err)
+			}
+		}
+		stream.CloseSend()
+	}()
+	for {
+		resp, err := stream.Recv()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			t.Fatalf("Failed StreamingOutputCall: %v", err)
+		}
+		assert.Equal(t, payload, resp.Payload)
+	}
+	assertChildParentSpans(t, tracer)
+}
+
+func TestStreamingContextCancellationOpenTracing(t *testing.T) {
+	tracer := mocktracer.New()
+	e := env{
+		streamClientInt: otgrpc.OpenTracingStreamClientInterceptor(tracer),
+		streamServerInt: otgrpc.OpenTracingStreamServerInterceptor(tracer),
+	}
+	te := newTest(t, e)
+	defer te.tearDown()
+
+	payload := int32(0)
+	ctx, cancel := context.WithCancel(context.Background())
+	_, err := te.c.StreamingOutputCall(ctx, &testpb.SimpleRequest{payload})
+	if err != nil {
+		t.Fatalf("Failed StreamingOutputCall: %v", err)
+	}
+	cancel()
+	time.Sleep(100 * time.Millisecond)
+	spans := tracer.FinishedSpans()
+	assert.Equal(t, 2, len(spans))
+	if len(spans) != 2 {
+		t.Fatalf("Incorrect span length")
+	}
+	parent := spans[0]
+	child := spans[1]
+	assert.Equal(t, child.ParentID, parent.Context().(mocktracer.MockSpanContext).SpanID)
+	assert.True(t, parent.Tag("error").(bool))
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/test/otgrpc_testing/test.pb.go

@@ -0,0 +1,357 @@
+// Code generated by protoc-gen-go.
+// source: test.proto
+// DO NOT EDIT!
+
+/*
+Package otgrpc_testing is a generated protocol buffer package.
+
+It is generated from these files:
+	test.proto
+
+It has these top-level messages:
+	SimpleRequest
+	SimpleResponse
+*/
+package otgrpc_testing
+
+import proto "github.com/golang/protobuf/proto"
+import fmt "fmt"
+import math "math"
+
+import (
+	context "golang.org/x/net/context"
+	grpc "google.golang.org/grpc"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
+
+type SimpleRequest struct {
+	Payload int32 `protobuf:"varint,1,opt,name=payload" json:"payload,omitempty"`
+}
+
+func (m *SimpleRequest) Reset()                    { *m = SimpleRequest{} }
+func (m *SimpleRequest) String() string            { return proto.CompactTextString(m) }
+func (*SimpleRequest) ProtoMessage()               {}
+func (*SimpleRequest) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{0} }
+
+func (m *SimpleRequest) GetPayload() int32 {
+	if m != nil {
+		return m.Payload
+	}
+	return 0
+}
+
+type SimpleResponse struct {
+	Payload int32 `protobuf:"varint,1,opt,name=payload" json:"payload,omitempty"`
+}
+
+func (m *SimpleResponse) Reset()                    { *m = SimpleResponse{} }
+func (m *SimpleResponse) String() string            { return proto.CompactTextString(m) }
+func (*SimpleResponse) ProtoMessage()               {}
+func (*SimpleResponse) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{1} }
+
+func (m *SimpleResponse) GetPayload() int32 {
+	if m != nil {
+		return m.Payload
+	}
+	return 0
+}
+
+func init() {
+	proto.RegisterType((*SimpleRequest)(nil), "otgrpc.testing.SimpleRequest")
+	proto.RegisterType((*SimpleResponse)(nil), "otgrpc.testing.SimpleResponse")
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConn
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion4
+
+// Client API for TestService service
+
+type TestServiceClient interface {
+	UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error)
+	StreamingOutputCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error)
+	StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error)
+	StreamingBidirectionalCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingBidirectionalCallClient, error)
+}
+
+type testServiceClient struct {
+	cc *grpc.ClientConn
+}
+
+func NewTestServiceClient(cc *grpc.ClientConn) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) UnaryCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (*SimpleResponse, error) {
+	out := new(SimpleResponse)
+	err := grpc.Invoke(ctx, "/otgrpc.testing.TestService/UnaryCall", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *testServiceClient) StreamingOutputCall(ctx context.Context, in *SimpleRequest, opts ...grpc.CallOption) (TestService_StreamingOutputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[0], c.cc, "/otgrpc.testing.TestService/StreamingOutputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingOutputCallClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type TestService_StreamingOutputCallClient interface {
+	Recv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingOutputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingOutputCallClient) Recv() (*SimpleResponse, error) {
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) StreamingInputCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingInputCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[1], c.cc, "/otgrpc.testing.TestService/StreamingInputCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingInputCallClient{stream}
+	return x, nil
+}
+
+type TestService_StreamingInputCallClient interface {
+	Send(*SimpleRequest) error
+	CloseAndRecv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingInputCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingInputCallClient) Send(m *SimpleRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallClient) CloseAndRecv() (*SimpleResponse, error) {
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *testServiceClient) StreamingBidirectionalCall(ctx context.Context, opts ...grpc.CallOption) (TestService_StreamingBidirectionalCallClient, error) {
+	stream, err := grpc.NewClientStream(ctx, &_TestService_serviceDesc.Streams[2], c.cc, "/otgrpc.testing.TestService/StreamingBidirectionalCall", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &testServiceStreamingBidirectionalCallClient{stream}
+	return x, nil
+}
+
+type TestService_StreamingBidirectionalCallClient interface {
+	Send(*SimpleRequest) error
+	Recv() (*SimpleResponse, error)
+	grpc.ClientStream
+}
+
+type testServiceStreamingBidirectionalCallClient struct {
+	grpc.ClientStream
+}
+
+func (x *testServiceStreamingBidirectionalCallClient) Send(m *SimpleRequest) error {
+	return x.ClientStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingBidirectionalCallClient) Recv() (*SimpleResponse, error) {
+	m := new(SimpleResponse)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// Server API for TestService service
+
+type TestServiceServer interface {
+	UnaryCall(context.Context, *SimpleRequest) (*SimpleResponse, error)
+	StreamingOutputCall(*SimpleRequest, TestService_StreamingOutputCallServer) error
+	StreamingInputCall(TestService_StreamingInputCallServer) error
+	StreamingBidirectionalCall(TestService_StreamingBidirectionalCallServer) error
+}
+
+func RegisterTestServiceServer(s *grpc.Server, srv TestServiceServer) {
+	s.RegisterService(&_TestService_serviceDesc, srv)
+}
+
+func _TestService_UnaryCall_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(SimpleRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).UnaryCall(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/otgrpc.testing.TestService/UnaryCall",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).UnaryCall(ctx, req.(*SimpleRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _TestService_StreamingOutputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(SimpleRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(TestServiceServer).StreamingOutputCall(m, &testServiceStreamingOutputCallServer{stream})
+}
+
+type TestService_StreamingOutputCallServer interface {
+	Send(*SimpleResponse) error
+	grpc.ServerStream
+}
+
+type testServiceStreamingOutputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingOutputCallServer) Send(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _TestService_StreamingInputCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).StreamingInputCall(&testServiceStreamingInputCallServer{stream})
+}
+
+type TestService_StreamingInputCallServer interface {
+	SendAndClose(*SimpleResponse) error
+	Recv() (*SimpleRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceStreamingInputCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingInputCallServer) SendAndClose(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingInputCallServer) Recv() (*SimpleRequest, error) {
+	m := new(SimpleRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func _TestService_StreamingBidirectionalCall_Handler(srv interface{}, stream grpc.ServerStream) error {
+	return srv.(TestServiceServer).StreamingBidirectionalCall(&testServiceStreamingBidirectionalCallServer{stream})
+}
+
+type TestService_StreamingBidirectionalCallServer interface {
+	Send(*SimpleResponse) error
+	Recv() (*SimpleRequest, error)
+	grpc.ServerStream
+}
+
+type testServiceStreamingBidirectionalCallServer struct {
+	grpc.ServerStream
+}
+
+func (x *testServiceStreamingBidirectionalCallServer) Send(m *SimpleResponse) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func (x *testServiceStreamingBidirectionalCallServer) Recv() (*SimpleRequest, error) {
+	m := new(SimpleRequest)
+	if err := x.ServerStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+var _TestService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "otgrpc.testing.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "UnaryCall",
+			Handler:    _TestService_UnaryCall_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "StreamingOutputCall",
+			Handler:       _TestService_StreamingOutputCall_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "StreamingInputCall",
+			Handler:       _TestService_StreamingInputCall_Handler,
+			ClientStreams: true,
+		},
+		{
+			StreamName:    "StreamingBidirectionalCall",
+			Handler:       _TestService_StreamingBidirectionalCall_Handler,
+			ServerStreams: true,
+			ClientStreams: true,
+		},
+	},
+	Metadata: "test.proto",
+}
+
+func init() { proto.RegisterFile("test.proto", fileDescriptor0) }
+
+var fileDescriptor0 = []byte{
+	// 210 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xe2, 0x2a, 0x49, 0x2d, 0x2e,
+	0xd1, 0x2b, 0x28, 0xca, 0x2f, 0xc9, 0x17, 0xe2, 0xcb, 0x2f, 0x49, 0x2f, 0x2a, 0x48, 0xd6, 0x03,
+	0x09, 0x65, 0xe6, 0xa5, 0x2b, 0x69, 0x72, 0xf1, 0x06, 0x67, 0xe6, 0x16, 0xe4, 0xa4, 0x06, 0xa5,
+	0x16, 0x96, 0xa6, 0x16, 0x97, 0x08, 0x49, 0x70, 0xb1, 0x17, 0x24, 0x56, 0xe6, 0xe4, 0x27, 0xa6,
+	0x48, 0x30, 0x2a, 0x30, 0x6a, 0xb0, 0x06, 0xc1, 0xb8, 0x4a, 0x5a, 0x5c, 0x7c, 0x30, 0xa5, 0xc5,
+	0x05, 0xf9, 0x79, 0xc5, 0xa9, 0xb8, 0xd5, 0x1a, 0xbd, 0x64, 0xe2, 0xe2, 0x0e, 0x49, 0x2d, 0x2e,
+	0x09, 0x4e, 0x2d, 0x2a, 0xcb, 0x4c, 0x4e, 0x15, 0xf2, 0xe2, 0xe2, 0x0c, 0xcd, 0x4b, 0x2c, 0xaa,
+	0x74, 0x4e, 0xcc, 0xc9, 0x11, 0x92, 0xd5, 0x43, 0x75, 0x84, 0x1e, 0x8a, 0x0b, 0xa4, 0xe4, 0x70,
+	0x49, 0x43, 0x6d, 0x0d, 0xe3, 0x12, 0x0e, 0x2e, 0x29, 0x4a, 0x4d, 0xcc, 0xcd, 0xcc, 0x4b, 0xf7,
+	0x2f, 0x2d, 0x29, 0x28, 0x2d, 0xa1, 0x82, 0xa9, 0x06, 0x8c, 0x42, 0xa1, 0x5c, 0x42, 0x70, 0x73,
+	0x3d, 0xf3, 0xa8, 0x63, 0xac, 0x06, 0xa3, 0x50, 0x3c, 0x97, 0x14, 0xdc, 0x58, 0xa7, 0xcc, 0x94,
+	0xcc, 0xa2, 0xd4, 0xe4, 0x92, 0xcc, 0xfc, 0xbc, 0xc4, 0x1c, 0xaa, 0x18, 0x6f, 0xc0, 0x98, 0xc4,
+	0x06, 0x8e, 0x59, 0x63, 0x40, 0x00, 0x00, 0x00, 0xff, 0xff, 0xfd, 0x50, 0x3e, 0xe4, 0xe7, 0x01,
+	0x00, 0x00,
+}

vendor/github.com/grpc-ecosystem/grpc-opentracing/go/otgrpc/test/otgrpc_testing/test.proto

@@ -0,0 +1,21 @@
+syntax = "proto3";
+
+package otgrpc.testing;
+
+message SimpleRequest {
+  int32 payload = 1;
+}
+
+message SimpleResponse {
+  int32 payload = 1;
+}
+
+service TestService {
+  rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
+
+  rpc StreamingOutputCall(SimpleRequest) returns (stream SimpleResponse);
+
+  rpc StreamingInputCall(stream SimpleRequest) returns (SimpleResponse);
+
+  rpc StreamingBidirectionalCall(stream SimpleRequest) returns (stream SimpleResponse);
+}