fix

encoding/form/proto_decode.go

@@ -82,16 +82,14 @@ func getFieldDescriptor(v protoreflect.Message, fieldName string) protoreflect.F
 	var fd protoreflect.FieldDescriptor
 	fd = getDescriptorByFieldAndName(fields, fieldName)
 	if fd == nil {
-		reg := regexp.MustCompile(`^\w*\[`)
 		switch {
 		case v.Descriptor().FullName() == structMessageFullname:
 			fd = fields.ByNumber(structFieldsFieldNumber)
 		case len(fieldName) > 2 && strings.HasSuffix(fieldName, "[]"):
 			fd = getDescriptorByFieldAndName(fields, strings.TrimSuffix(fieldName, "[]"))
-		case reg.MatchString(fieldName):
+		case regexp.MustCompile(`^\w*\[(\w*)]`).MatchString(fieldName):
 			// If the type is map, you get the string "map[kratos]", where "map" is a field of proto and "kratos" is a key of map
-			mapName := reg.FindString(fieldName)
-			fd = getDescriptorByFieldAndName(fields, mapName[:len(mapName)-1])
+			fd = getDescriptorByFieldAndName(fields, regexp.MustCompile(`^\w*`).FindString(fieldName))
 		}
 	}
 	return fd
@@ -146,7 +144,6 @@ func populateMapField(fd protoreflect.FieldDescriptor, mp protoreflect.Map, fiel
 	if err != nil {
 		return fmt.Errorf("parsing map value %q: %w", fd.FullName().Name(), err)
 	}
-	// TODO: map nested map are not supported
 	mp.Set(key.MapKey(), value)
 	return nil
 }