Version bump to grpc-gateway v1.3.0

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/query.go

@@ -4,7 +4,9 @@ import (
 	"fmt"
 	"net/url"
 	"reflect"
+	"strconv"
 	"strings"
+	"time"
 
 	"github.com/golang/protobuf/proto"
 	"github.com/grpc-ecosystem/grpc-gateway/utilities"
@@ -38,31 +40,39 @@ func populateFieldValueFromPath(msg proto.Message, fieldPath []string, values []
 	if m.Kind() != reflect.Ptr {
 		return fmt.Errorf("unexpected type %T: %v", msg, msg)
 	}
+	var props *proto.Properties
 	m = m.Elem()
 	for i, fieldName := range fieldPath {
 		isLast := i == len(fieldPath)-1
 		if !isLast && m.Kind() != reflect.Struct {
 			return fmt.Errorf("non-aggregate type in the mid of path: %s", strings.Join(fieldPath, "."))
 		}
-		f := fieldByProtoName(m, fieldName)
-		if !f.IsValid() {
+		var f reflect.Value
+		var err error
+		f, props, err = fieldByProtoName(m, fieldName)
+		if err != nil {
+			return err
+		} else if !f.IsValid() {
 			grpclog.Printf("field not found in %T: %s", msg, strings.Join(fieldPath, "."))
 			return nil
 		}
 
 		switch f.Kind() {
 		case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64, reflect.String, reflect.Uint32, reflect.Uint64:
+			if !isLast {
+				return fmt.Errorf("unexpected nested field %s in %s", fieldPath[i+1], strings.Join(fieldPath[:i+1], "."))
+			}
 			m = f
 		case reflect.Slice:
 			// TODO(yugui) Support []byte
 			if !isLast {
 				return fmt.Errorf("unexpected repeated field in %s", strings.Join(fieldPath, "."))
 			}
-			return populateRepeatedField(f, values)
+			return populateRepeatedField(f, values, props)
 		case reflect.Ptr:
 			if f.IsNil() {
 				m = reflect.New(f.Type().Elem())
-				f.Set(m)
+				f.Set(m.Convert(f.Type()))
 			}
 			m = f.Elem()
 			continue
@@ -80,39 +90,127 @@ func populateFieldValueFromPath(msg proto.Message, fieldPath []string, values []
 	default:
 		grpclog.Printf("too many field values: %s", strings.Join(fieldPath, "."))
 	}
-	return populateField(m, values[0])
+	return populateField(m, values[0], props)
 }
 
 // fieldByProtoName looks up a field whose corresponding protobuf field name is "name".
 // "m" must be a struct value. It returns zero reflect.Value if no such field found.
-func fieldByProtoName(m reflect.Value, name string) reflect.Value {
+func fieldByProtoName(m reflect.Value, name string) (reflect.Value, *proto.Properties, error) {
 	props := proto.GetProperties(m.Type())
+
+	// look up field name in oneof map
+	if op, ok := props.OneofTypes[name]; ok {
+		v := reflect.New(op.Type.Elem())
+		field := m.Field(op.Field)
+		if !field.IsNil() {
+			return reflect.Value{}, nil, fmt.Errorf("field already set for %s oneof", props.Prop[op.Field].OrigName)
+		}
+		field.Set(v)
+		return v.Elem().Field(0), op.Prop, nil
+	}
+
 	for _, p := range props.Prop {
 		if p.OrigName == name {
-			return m.FieldByName(p.Name)
+			return m.FieldByName(p.Name), p, nil
+		}
+		if p.JSONName == name {
+			return m.FieldByName(p.Name), p, nil
 		}
 	}
-	return reflect.Value{}
+	return reflect.Value{}, nil, nil
 }
 
-func populateRepeatedField(f reflect.Value, values []string) error {
+func populateRepeatedField(f reflect.Value, values []string, props *proto.Properties) error {
 	elemType := f.Type().Elem()
+
+	// is the destination field a slice of an enumeration type?
+	if enumValMap := proto.EnumValueMap(props.Enum); enumValMap != nil {
+		return populateFieldEnumRepeated(f, values, enumValMap)
+	}
+
 	conv, ok := convFromType[elemType.Kind()]
 	if !ok {
 		return fmt.Errorf("unsupported field type %s", elemType)
 	}
-	f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)))
+	f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)).Convert(f.Type()))
 	for i, v := range values {
 		result := conv.Call([]reflect.Value{reflect.ValueOf(v)})
 		if err := result[1].Interface(); err != nil {
 			return err.(error)
 		}
-		f.Index(i).Set(result[0])
+		f.Index(i).Set(result[0].Convert(f.Index(i).Type()))
 	}
 	return nil
 }
 
-func populateField(f reflect.Value, value string) error {
+func populateField(f reflect.Value, value string, props *proto.Properties) error {
+	// Handle well known type
+	type wkt interface {
+		XXX_WellKnownType() string
+	}
+	if wkt, ok := f.Addr().Interface().(wkt); ok {
+		switch wkt.XXX_WellKnownType() {
+		case "Timestamp":
+			if value == "null" {
+				f.Field(0).SetInt(0)
+				f.Field(1).SetInt(0)
+				return nil
+			}
+
+			t, err := time.Parse(time.RFC3339Nano, value)
+			if err != nil {
+				return fmt.Errorf("bad Timestamp: %v", err)
+			}
+			f.Field(0).SetInt(int64(t.Unix()))
+			f.Field(1).SetInt(int64(t.Nanosecond()))
+			return nil
+		case "DoubleValue":
+			fallthrough
+		case "FloatValue":
+			float64Val, err := strconv.ParseFloat(value, 64)
+			if err != nil {
+				return fmt.Errorf("bad DoubleValue: %s", value)
+			}
+			f.Field(0).SetFloat(float64Val)
+			return nil
+		case "Int64Value":
+			fallthrough
+		case "Int32Value":
+			int64Val, err := strconv.ParseInt(value, 10, 64)
+			if err != nil {
+				return fmt.Errorf("bad DoubleValue: %s", value)
+			}
+			f.Field(0).SetInt(int64Val)
+			return nil
+		case "UInt64Value":
+			fallthrough
+		case "UInt32Value":
+			uint64Val, err := strconv.ParseUint(value, 10, 64)
+			if err != nil {
+				return fmt.Errorf("bad DoubleValue: %s", value)
+			}
+			f.Field(0).SetUint(uint64Val)
+			return nil
+		case "BoolValue":
+			if value == "true" {
+				f.Field(0).SetBool(true)
+			} else if value == "false" {
+				f.Field(0).SetBool(false)
+			} else {
+				return fmt.Errorf("bad BoolValue: %s", value)
+			}
+			return nil
+		case "StringValue":
+			f.Field(0).SetString(value)
+			return nil
+		}
+	}
+
+	// is the destination field an enumeration type?
+	if enumValMap := proto.EnumValueMap(props.Enum); enumValMap != nil {
+		return populateFieldEnum(f, value, enumValMap)
+	}
+
 	conv, ok := convFromType[f.Kind()]
 	if !ok {
 		return fmt.Errorf("unsupported field type %T", f)
@@ -121,7 +219,48 @@ func populateField(f reflect.Value, value string) error {
 	if err := result[1].Interface(); err != nil {
 		return err.(error)
 	}
-	f.Set(result[0])
+	f.Set(result[0].Convert(f.Type()))
+	return nil
+}
+
+func convertEnum(value string, t reflect.Type, enumValMap map[string]int32) (reflect.Value, error) {
+	// see if it's an enumeration string
+	if enumVal, ok := enumValMap[value]; ok {
+		return reflect.ValueOf(enumVal).Convert(t), nil
+	}
+
+	// check for an integer that matches an enumeration value
+	eVal, err := strconv.Atoi(value)
+	if err != nil {
+		return reflect.Value{}, fmt.Errorf("%s is not a valid %s", value, t)
+	}
+	for _, v := range enumValMap {
+		if v == int32(eVal) {
+			return reflect.ValueOf(eVal).Convert(t), nil
+		}
+	}
+	return reflect.Value{}, fmt.Errorf("%s is not a valid %s", value, t)
+}
+
+func populateFieldEnum(f reflect.Value, value string, enumValMap map[string]int32) error {
+	cval, err := convertEnum(value, f.Type(), enumValMap)
+	if err != nil {
+		return err
+	}
+	f.Set(cval)
+	return nil
+}
+
+func populateFieldEnumRepeated(f reflect.Value, values []string, enumValMap map[string]int32) error {
+	elemType := f.Type().Elem()
+	f.Set(reflect.MakeSlice(f.Type(), len(values), len(values)).Convert(f.Type()))
+	for i, v := range values {
+		result, err := convertEnum(v, elemType, enumValMap)
+		if err != nil {
+			return err
+		}
+		f.Index(i).Set(result)
+	}
 	return nil
 }