From b84736e9b6401df0c6eeab9950bef09458a6aefd Mon Sep 17 00:00:00 2001
From: Christopher Speller <crspeller@gmail.com>
Date: Fri, 29 Sep 2017 12:46:30 -0700
Subject: Updating server dependancies. (#7538)

---
 vendor/github.com/golang/protobuf/jsonpb/jsonpb.go | 66 ++++++++++++++++------
 1 file changed, 50 insertions(+), 16 deletions(-)

(limited to 'vendor/github.com/golang/protobuf/jsonpb/jsonpb.go')

diff --git a/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go b/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go
index 29bca020f..110ae1384 100644
--- a/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go
+++ b/vendor/github.com/golang/protobuf/jsonpb/jsonpb.go
@@ -73,6 +73,31 @@ type Marshaler struct {
 
 	// Whether to use the original (.proto) name for fields.
 	OrigName bool
+
+	// A custom URL resolver to use when marshaling Any messages to JSON.
+	// If unset, the default resolution strategy is to extract the
+	// fully-qualified type name from the type URL and pass that to
+	// proto.MessageType(string).
+	AnyResolver AnyResolver
+}
+
+// AnyResolver takes a type URL, present in an Any message, and resolves it into
+// an instance of the associated message.
+type AnyResolver interface {
+	Resolve(typeUrl string) (proto.Message, error)
+}
+
+func defaultResolveAny(typeUrl string) (proto.Message, error) {
+	// Only the part of typeUrl after the last slash is relevant.
+	mname := typeUrl
+	if slash := strings.LastIndex(mname, "/"); slash >= 0 {
+		mname = mname[slash+1:]
+	}
+	mt := proto.MessageType(mname)
+	if mt == nil {
+		return nil, fmt.Errorf("unknown message type %q", mname)
+	}
+	return reflect.New(mt.Elem()).Interface().(proto.Message), nil
 }
 
 // JSONPBMarshaler is implemented by protobuf messages that customize the
@@ -344,16 +369,17 @@ func (m *Marshaler) marshalAny(out *errWriter, any proto.Message, indent string)
 	turl := v.Field(0).String()
 	val := v.Field(1).Bytes()
 
-	// Only the part of type_url after the last slash is relevant.
-	mname := turl
-	if slash := strings.LastIndex(mname, "/"); slash >= 0 {
-		mname = mname[slash+1:]
+	var msg proto.Message
+	var err error
+	if m.AnyResolver != nil {
+		msg, err = m.AnyResolver.Resolve(turl)
+	} else {
+		msg, err = defaultResolveAny(turl)
 	}
-	mt := proto.MessageType(mname)
-	if mt == nil {
-		return fmt.Errorf("unknown message type %q", mname)
+	if err != nil {
+		return err
 	}
-	msg := reflect.New(mt.Elem()).Interface().(proto.Message)
+
 	if err := proto.Unmarshal(val, msg); err != nil {
 		return err
 	}
@@ -590,6 +616,12 @@ type Unmarshaler struct {
 	// Whether to allow messages to contain unknown fields, as opposed to
 	// failing to unmarshal.
 	AllowUnknownFields bool
+
+	// A custom URL resolver to use when unmarshaling Any messages from JSON.
+	// If unset, the default resolution strategy is to extract the
+	// fully-qualified type name from the type URL and pass that to
+	// proto.MessageType(string).
+	AnyResolver AnyResolver
 }
 
 // UnmarshalNext unmarshals the next protocol buffer from a JSON object stream.
@@ -641,7 +673,8 @@ func (u *Unmarshaler) unmarshalValue(target reflect.Value, inputValue json.RawMe
 	if targetType.Kind() == reflect.Ptr {
 		// If input value is "null" and target is a pointer type, then the field should be treated as not set
 		// UNLESS the target is structpb.Value, in which case it should be set to structpb.NullValue.
-		if string(inputValue) == "null" && targetType != reflect.TypeOf(&stpb.Value{}) {
+		_, isJSONPBUnmarshaler := target.Interface().(JSONPBUnmarshaler)
+		if string(inputValue) == "null" && targetType != reflect.TypeOf(&stpb.Value{}) && !isJSONPBUnmarshaler {
 			return nil
 		}
 		target.Set(reflect.New(targetType.Elem()))
@@ -679,16 +712,17 @@ func (u *Unmarshaler) unmarshalValue(target reflect.Value, inputValue json.RawMe
 			}
 			target.Field(0).SetString(turl)
 
-			mname := turl
-			if slash := strings.LastIndex(mname, "/"); slash >= 0 {
-				mname = mname[slash+1:]
+			var m proto.Message
+			var err error
+			if u.AnyResolver != nil {
+				m, err = u.AnyResolver.Resolve(turl)
+			} else {
+				m, err = defaultResolveAny(turl)
 			}
-			mt := proto.MessageType(mname)
-			if mt == nil {
-				return fmt.Errorf("unknown message type %q", mname)
+			if err != nil {
+				return err
 			}
 
-			m := reflect.New(mt.Elem()).Interface().(proto.Message)
 			if _, ok := m.(wkt); ok {
 				val, ok := jsonFields["value"]
 				if !ok {
-- 
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