diff --git a/examples/internal/helloworld/helloworld.pb.gw.go b/examples/internal/helloworld/helloworld.pb.gw.go
index 8dccd650f28..c20429ec4e9 100644
--- a/examples/internal/helloworld/helloworld.pb.gw.go
+++ b/examples/internal/helloworld/helloworld.pb.gw.go
@@ -1212,25 +1212,25 @@ func RegisterGreeterHandlerClient(ctx context.Context, mux *runtime.ServeMux, cl
 }
 
 var (
-	pattern_Greeter_SayHello_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"say", "name"}, ""))
+	pattern_Greeter_SayHello_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"say", "name"}, "", false))
 
-	pattern_Greeter_SayHello_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "strval", "strVal"}, ""))
+	pattern_Greeter_SayHello_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "strval", "strVal"}, "", false))
 
-	pattern_Greeter_SayHello_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "floatval", "floatVal"}, ""))
+	pattern_Greeter_SayHello_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "floatval", "floatVal"}, "", false))
 
-	pattern_Greeter_SayHello_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "doubleval", "doubleVal"}, ""))
+	pattern_Greeter_SayHello_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "doubleval", "doubleVal"}, "", false))
 
-	pattern_Greeter_SayHello_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "boolval", "boolVal"}, ""))
+	pattern_Greeter_SayHello_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "boolval", "boolVal"}, "", false))
 
-	pattern_Greeter_SayHello_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "bytesval", "bytesVal"}, ""))
+	pattern_Greeter_SayHello_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "bytesval", "bytesVal"}, "", false))
 
-	pattern_Greeter_SayHello_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "int32val", "int32Val"}, ""))
+	pattern_Greeter_SayHello_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "int32val", "int32Val"}, "", false))
 
-	pattern_Greeter_SayHello_7 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "uint32val", "uint32Val"}, ""))
+	pattern_Greeter_SayHello_7 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "uint32val", "uint32Val"}, "", false))
 
-	pattern_Greeter_SayHello_8 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "int64val", "int64Val"}, ""))
+	pattern_Greeter_SayHello_8 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "int64val", "int64Val"}, "", false))
 
-	pattern_Greeter_SayHello_9 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "uint64val", "uint64Val"}, ""))
+	pattern_Greeter_SayHello_9 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"say", "uint64val", "uint64Val"}, "", false))
 )
 
 var (
diff --git a/examples/internal/integration/main_test.go b/examples/internal/integration/main_test.go
index e110a5462c1..42797e7a550 100644
--- a/examples/internal/integration/main_test.go
+++ b/examples/internal/integration/main_test.go
@@ -11,7 +11,7 @@ import (
 
 	"github.com/golang/glog"
 	"github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/gateway"
-	server "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/server"
+	"github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/server"
 	gwruntime "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
 )
 
diff --git a/examples/internal/proto/examplepb/a_bit_of_everything.pb.gw.go b/examples/internal/proto/examplepb/a_bit_of_everything.pb.gw.go
index 25a9a60c826..aafa901d268 100644
--- a/examples/internal/proto/examplepb/a_bit_of_everything.pb.gw.go
+++ b/examples/internal/proto/examplepb/a_bit_of_everything.pb.gw.go
@@ -3583,59 +3583,59 @@ func RegisterABitOfEverythingServiceHandlerClient(ctx context.Context, mux *runt
 }
 
 var (
-	pattern_ABitOfEverythingService_Create_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5, 2, 6, 1, 0, 4, 1, 5, 7, 1, 0, 4, 1, 5, 8, 1, 0, 4, 1, 5, 9, 1, 0, 4, 1, 5, 10, 1, 0, 4, 1, 5, 11, 2, 12, 1, 0, 4, 2, 5, 13, 1, 0, 4, 1, 5, 14, 1, 0, 4, 1, 5, 15, 1, 0, 4, 1, 5, 16, 1, 0, 4, 1, 5, 17, 1, 0, 4, 1, 5, 18, 1, 0, 4, 1, 5, 19, 1, 0, 4, 1, 5, 20, 1, 0, 4, 1, 5, 21, 1, 0, 4, 1, 5, 22, 1, 0, 4, 1, 5, 23}, []string{"v1", "example", "a_bit_of_everything", "float_value", "double_value", "int64_value", "separator", "uint64_value", "int32_value", "fixed64_value", "fixed32_value", "bool_value", "strprefix", "string_value", "uint32_value", "sfixed32_value", "sfixed64_value", "sint32_value", "sint64_value", "nonConventionalNameValue", "enum_value", "path_enum_value", "nested_path_enum_value", "enum_value_annotation"}, ""))
+	pattern_ABitOfEverythingService_Create_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5, 2, 6, 1, 0, 4, 1, 5, 7, 1, 0, 4, 1, 5, 8, 1, 0, 4, 1, 5, 9, 1, 0, 4, 1, 5, 10, 1, 0, 4, 1, 5, 11, 2, 12, 1, 0, 4, 2, 5, 13, 1, 0, 4, 1, 5, 14, 1, 0, 4, 1, 5, 15, 1, 0, 4, 1, 5, 16, 1, 0, 4, 1, 5, 17, 1, 0, 4, 1, 5, 18, 1, 0, 4, 1, 5, 19, 1, 0, 4, 1, 5, 20, 1, 0, 4, 1, 5, 21, 1, 0, 4, 1, 5, 22, 1, 0, 4, 1, 5, 23}, []string{"v1", "example", "a_bit_of_everything", "float_value", "double_value", "int64_value", "separator", "uint64_value", "int32_value", "fixed64_value", "fixed32_value", "bool_value", "strprefix", "string_value", "uint32_value", "sfixed32_value", "sfixed64_value", "sint32_value", "sint64_value", "nonConventionalNameValue", "enum_value", "path_enum_value", "nested_path_enum_value", "enum_value_annotation"}, "", false))
 
-	pattern_ABitOfEverythingService_CreateBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "a_bit_of_everything"}, ""))
+	pattern_ABitOfEverythingService_CreateBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "a_bit_of_everything"}, "", false))
 
-	pattern_ABitOfEverythingService_CreateBook_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 2, 5, 2, 2, 3}, []string{"v1", "publishers", "parent", "books"}, ""))
+	pattern_ABitOfEverythingService_CreateBook_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 2, 5, 2, 2, 3}, []string{"v1", "publishers", "parent", "books"}, "", false))
 
-	pattern_ABitOfEverythingService_UpdateBook_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 2, 2, 1, 0, 4, 4, 5, 3}, []string{"v1", "publishers", "books", "book.name"}, ""))
+	pattern_ABitOfEverythingService_UpdateBook_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 2, 2, 1, 0, 4, 4, 5, 3}, []string{"v1", "publishers", "books", "book.name"}, "", false))
 
-	pattern_ABitOfEverythingService_Lookup_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, ""))
+	pattern_ABitOfEverythingService_Lookup_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_Update_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, ""))
+	pattern_ABitOfEverythingService_Update_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_UpdateV2_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "a_bit_of_everything", "abe.uuid"}, ""))
+	pattern_ABitOfEverythingService_UpdateV2_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "a_bit_of_everything", "abe.uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_UpdateV2_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "a_bit_of_everything", "abe.uuid"}, ""))
+	pattern_ABitOfEverythingService_UpdateV2_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "a_bit_of_everything", "abe.uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_UpdateV2_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2a", "example", "a_bit_of_everything", "abe.uuid"}, ""))
+	pattern_ABitOfEverythingService_UpdateV2_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2a", "example", "a_bit_of_everything", "abe.uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_Delete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, ""))
+	pattern_ABitOfEverythingService_Delete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "a_bit_of_everything", "uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_GetQuery_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "a_bit_of_everything", "query", "uuid"}, ""))
+	pattern_ABitOfEverythingService_GetQuery_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "a_bit_of_everything", "query", "uuid"}, "", false))
 
-	pattern_ABitOfEverythingService_GetRepeatedQuery_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5, 1, 0, 4, 1, 5, 6, 1, 0, 4, 1, 5, 7, 1, 0, 4, 1, 5, 8, 1, 0, 4, 1, 5, 9, 1, 0, 4, 1, 5, 10, 1, 0, 4, 1, 5, 11, 1, 0, 4, 1, 5, 12, 1, 0, 4, 1, 5, 13, 1, 0, 4, 1, 5, 14, 1, 0, 4, 1, 5, 15, 1, 0, 4, 1, 5, 16, 1, 0, 4, 1, 5, 17, 1, 0, 4, 1, 5, 18}, []string{"v1", "example", "a_bit_of_everything_repeated", "path_repeated_float_value", "path_repeated_double_value", "path_repeated_int64_value", "path_repeated_uint64_value", "path_repeated_int32_value", "path_repeated_fixed64_value", "path_repeated_fixed32_value", "path_repeated_bool_value", "path_repeated_string_value", "path_repeated_bytes_value", "path_repeated_uint32_value", "path_repeated_enum_value", "path_repeated_sfixed32_value", "path_repeated_sfixed64_value", "path_repeated_sint32_value", "path_repeated_sint64_value"}, ""))
+	pattern_ABitOfEverythingService_GetRepeatedQuery_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5, 1, 0, 4, 1, 5, 6, 1, 0, 4, 1, 5, 7, 1, 0, 4, 1, 5, 8, 1, 0, 4, 1, 5, 9, 1, 0, 4, 1, 5, 10, 1, 0, 4, 1, 5, 11, 1, 0, 4, 1, 5, 12, 1, 0, 4, 1, 5, 13, 1, 0, 4, 1, 5, 14, 1, 0, 4, 1, 5, 15, 1, 0, 4, 1, 5, 16, 1, 0, 4, 1, 5, 17, 1, 0, 4, 1, 5, 18}, []string{"v1", "example", "a_bit_of_everything_repeated", "path_repeated_float_value", "path_repeated_double_value", "path_repeated_int64_value", "path_repeated_uint64_value", "path_repeated_int32_value", "path_repeated_fixed64_value", "path_repeated_fixed32_value", "path_repeated_bool_value", "path_repeated_string_value", "path_repeated_bytes_value", "path_repeated_uint32_value", "path_repeated_enum_value", "path_repeated_sfixed32_value", "path_repeated_sfixed64_value", "path_repeated_sint32_value", "path_repeated_sint64_value"}, "", false))
 
-	pattern_ABitOfEverythingService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "a_bit_of_everything", "echo", "value"}, ""))
+	pattern_ABitOfEverythingService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "a_bit_of_everything", "echo", "value"}, "", false))
 
-	pattern_ABitOfEverythingService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo"}, ""))
+	pattern_ABitOfEverythingService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo"}, "", false))
 
-	pattern_ABitOfEverythingService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo"}, ""))
+	pattern_ABitOfEverythingService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo"}, "", false))
 
-	pattern_ABitOfEverythingService_DeepPathEcho_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "deep_path", "single_nested.name"}, ""))
+	pattern_ABitOfEverythingService_DeepPathEcho_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "deep_path", "single_nested.name"}, "", false))
 
-	pattern_ABitOfEverythingService_Timeout_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "timeout"}, ""))
+	pattern_ABitOfEverythingService_Timeout_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "timeout"}, "", false))
 
-	pattern_ABitOfEverythingService_ErrorWithDetails_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "errorwithdetails"}, ""))
+	pattern_ABitOfEverythingService_ErrorWithDetails_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "errorwithdetails"}, "", false))
 
-	pattern_ABitOfEverythingService_GetMessageWithBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "withbody", "id"}, ""))
+	pattern_ABitOfEverythingService_GetMessageWithBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "withbody", "id"}, "", false))
 
-	pattern_ABitOfEverythingService_PostWithEmptyBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "postwithemptybody", "name"}, ""))
+	pattern_ABitOfEverythingService_PostWithEmptyBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "postwithemptybody", "name"}, "", false))
 
-	pattern_ABitOfEverythingService_CheckGetQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "a_bit_of_everything", "params", "get", "single_nested.name"}, ""))
+	pattern_ABitOfEverythingService_CheckGetQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "a_bit_of_everything", "params", "get", "single_nested.name"}, "", false))
 
-	pattern_ABitOfEverythingService_CheckNestedEnumGetQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 1, 0, 4, 1, 5, 6}, []string{"v1", "example", "a_bit_of_everything", "params", "get", "nested_enum", "single_nested.ok"}, ""))
+	pattern_ABitOfEverythingService_CheckNestedEnumGetQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 2, 5, 1, 0, 4, 1, 5, 6}, []string{"v1", "example", "a_bit_of_everything", "params", "get", "nested_enum", "single_nested.ok"}, "", false))
 
-	pattern_ABitOfEverythingService_CheckPostQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "a_bit_of_everything", "params", "post", "string_value"}, ""))
+	pattern_ABitOfEverythingService_CheckPostQueryParams_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3, 2, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "a_bit_of_everything", "params", "post", "string_value"}, "", false))
 
-	pattern_ABitOfEverythingService_OverwriteResponseContentType_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "overwriteresponsecontenttype"}, ""))
+	pattern_ABitOfEverythingService_OverwriteResponseContentType_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "overwriteresponsecontenttype"}, "", false))
 
-	pattern_ABitOfEverythingService_CheckExternalPathEnum_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"v2", "value"}, "check"))
+	pattern_ABitOfEverythingService_CheckExternalPathEnum_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"v2", "value"}, "check", false))
 
-	pattern_ABitOfEverythingService_CheckExternalNestedPathEnum_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"v2", "value"}, "check"))
+	pattern_ABitOfEverythingService_CheckExternalNestedPathEnum_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"v2", "value"}, "check", false))
 
-	pattern_ABitOfEverythingService_CheckStatus_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "checkStatus"}, ""))
+	pattern_ABitOfEverythingService_CheckStatus_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "checkStatus"}, "", false))
 )
 
 var (
@@ -3756,7 +3756,7 @@ func RegisterCamelCaseServiceNameHandlerClient(ctx context.Context, mux *runtime
 }
 
 var (
-	pattern_CamelCaseServiceName_Empty_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "empty"}, ""))
+	pattern_CamelCaseServiceName_Empty_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "empty"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/echo_service.pb.gw.go b/examples/internal/proto/examplepb/echo_service.pb.gw.go
index 7208f20b55d..1074a719c42 100644
--- a/examples/internal/proto/examplepb/echo_service.pb.gw.go
+++ b/examples/internal/proto/examplepb/echo_service.pb.gw.go
@@ -1032,21 +1032,21 @@ func RegisterEchoServiceHandlerClient(ctx context.Context, mux *runtime.ServeMux
 }
 
 var (
-	pattern_EchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo", "id"}, ""))
+	pattern_EchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo", "id"}, "", false))
 
-	pattern_EchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "echo", "id", "num"}, ""))
+	pattern_EchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "echo", "id", "num"}, "", false))
 
-	pattern_EchoService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "echo", "id", "num", "lang"}, ""))
+	pattern_EchoService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "echo", "id", "num", "lang"}, "", false))
 
-	pattern_EchoService_Echo_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "echo1", "id", "line_num", "status.note"}, ""))
+	pattern_EchoService_Echo_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v1", "example", "echo1", "id", "line_num", "status.note"}, "", false))
 
-	pattern_EchoService_Echo_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo2", "no.note"}, ""))
+	pattern_EchoService_Echo_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo2", "no.note"}, "", false))
 
-	pattern_EchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_body"}, ""))
+	pattern_EchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_body"}, "", false))
 
-	pattern_EchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_delete"}, ""))
+	pattern_EchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_delete"}, "", false))
 
-	pattern_EchoService_EchoPatch_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_patch"}, ""))
+	pattern_EchoService_EchoPatch_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_patch"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/flow_combination.pb.gw.go b/examples/internal/proto/examplepb/flow_combination.pb.gw.go
index ee9e1158fdc..ea3d9657667 100644
--- a/examples/internal/proto/examplepb/flow_combination.pb.gw.go
+++ b/examples/internal/proto/examplepb/flow_combination.pb.gw.go
@@ -2396,57 +2396,57 @@ func RegisterFlowCombinationHandlerClient(ctx context.Context, mux *runtime.Serv
 }
 
 var (
-	pattern_FlowCombination_RpcEmptyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "empty"}, ""))
+	pattern_FlowCombination_RpcEmptyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "empty"}, "", false))
 
-	pattern_FlowCombination_RpcEmptyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "empty", "stream"}, ""))
+	pattern_FlowCombination_RpcEmptyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "empty", "stream"}, "", false))
 
-	pattern_FlowCombination_StreamEmptyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"stream", "empty", "rpc"}, ""))
+	pattern_FlowCombination_StreamEmptyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"stream", "empty", "rpc"}, "", false))
 
-	pattern_FlowCombination_StreamEmptyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"stream", "empty"}, ""))
+	pattern_FlowCombination_StreamEmptyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"stream", "empty"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "body"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "body"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 0}, []string{"rpc", "path", "a", "b", "c"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 0}, []string{"rpc", "path", "a", "b", "c"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "query"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 0}, []string{"rpc", "query"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 0}, []string{"rpc", "body", "path", "a", "b"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 0}, []string{"rpc", "body", "path", "a", "b"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 0}, []string{"rpc", "body", "query"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 0}, []string{"rpc", "body", "query"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 2, 4, 2, 0}, []string{"rpc", "body", "path", "a", "query"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 2, 4, 2, 0}, []string{"rpc", "body", "path", "a", "query"}, "", false))
 
-	pattern_FlowCombination_RpcBodyRpc_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3, 2, 0}, []string{"rpc", "path", "a", "query"}, ""))
+	pattern_FlowCombination_RpcBodyRpc_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3, 2, 0}, []string{"rpc", "path", "a", "query"}, "", false))
 
-	pattern_FlowCombination_RpcPathSingleNestedRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, ""))
+	pattern_FlowCombination_RpcPathSingleNestedRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 2, 0}, []string{"rpc", "path-nested", "a.str", "b"}, ""))
+	pattern_FlowCombination_RpcPathNestedRpc_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 2, 0}, []string{"rpc", "path-nested", "a.str", "b"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedRpc_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, ""))
+	pattern_FlowCombination_RpcPathNestedRpc_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedRpc_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, ""))
+	pattern_FlowCombination_RpcPathNestedRpc_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 0}, []string{"rpc", "path-nested", "a.str"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "body", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "body", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 5}, []string{"rpc", "path", "a", "b", "c", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 5}, []string{"rpc", "path", "a", "b", "c", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "query", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"rpc", "query", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 5}, []string{"rpc", "body", "path", "a", "b", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 2, 5}, []string{"rpc", "body", "path", "a", "b", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"rpc", "body", "query", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"rpc", "body", "query", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 2, 4, 2, 5}, []string{"rpc", "body", "path", "a", "query", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_5 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 2, 4, 2, 5}, []string{"rpc", "body", "path", "a", "query", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcBodyStream_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3, 2, 4}, []string{"rpc", "path", "a", "query", "stream"}, ""))
+	pattern_FlowCombination_RpcBodyStream_6 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3, 2, 4}, []string{"rpc", "path", "a", "query", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcPathSingleNestedStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, ""))
+	pattern_FlowCombination_RpcPathSingleNestedStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 2, 4}, []string{"rpc", "path-nested", "a.str", "b", "stream"}, ""))
+	pattern_FlowCombination_RpcPathNestedStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 1, 0, 4, 1, 5, 3, 2, 4}, []string{"rpc", "path-nested", "a.str", "b", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedStream_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, ""))
+	pattern_FlowCombination_RpcPathNestedStream_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, "", false))
 
-	pattern_FlowCombination_RpcPathNestedStream_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, ""))
+	pattern_FlowCombination_RpcPathNestedStream_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2, 2, 3}, []string{"rpc", "path-nested", "a.str", "stream"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/generate_unbound_methods.pb.gw.go b/examples/internal/proto/examplepb/generate_unbound_methods.pb.gw.go
index 092073963d5..6dbcde42f1e 100644
--- a/examples/internal/proto/examplepb/generate_unbound_methods.pb.gw.go
+++ b/examples/internal/proto/examplepb/generate_unbound_methods.pb.gw.go
@@ -313,11 +313,11 @@ func RegisterGenerateUnboundMethodsEchoServiceHandlerClient(ctx context.Context,
 }
 
 var (
-	pattern_GenerateUnboundMethodsEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "Echo"}, ""))
+	pattern_GenerateUnboundMethodsEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "Echo"}, "", false))
 
-	pattern_GenerateUnboundMethodsEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "EchoBody"}, ""))
+	pattern_GenerateUnboundMethodsEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "EchoBody"}, "", false))
 
-	pattern_GenerateUnboundMethodsEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "EchoDelete"}, ""))
+	pattern_GenerateUnboundMethodsEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"grpc.gateway.examples.internal.proto.examplepb.GenerateUnboundMethodsEchoService", "EchoDelete"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/non_standard_names.pb.gw.go b/examples/internal/proto/examplepb/non_standard_names.pb.gw.go
index 50fae892a29..6152c0884b1 100644
--- a/examples/internal/proto/examplepb/non_standard_names.pb.gw.go
+++ b/examples/internal/proto/examplepb/non_standard_names.pb.gw.go
@@ -300,9 +300,9 @@ func RegisterNonStandardServiceHandlerClient(ctx context.Context, mux *runtime.S
 }
 
 var (
-	pattern_NonStandardService_Update_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "non_standard", "update"}, ""))
+	pattern_NonStandardService_Update_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "non_standard", "update"}, "", false))
 
-	pattern_NonStandardService_UpdateWithJSONNames_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "non_standard", "update_with_json_names"}, ""))
+	pattern_NonStandardService_UpdateWithJSONNames_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "non_standard", "update_with_json_names"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/openapi_merge_a.pb.gw.go b/examples/internal/proto/examplepb/openapi_merge_a.pb.gw.go
index f0d18addafa..0027bea508b 100644
--- a/examples/internal/proto/examplepb/openapi_merge_a.pb.gw.go
+++ b/examples/internal/proto/examplepb/openapi_merge_a.pb.gw.go
@@ -359,9 +359,9 @@ func RegisterServiceAHandlerClient(ctx context.Context, mux *runtime.ServeMux, c
 }
 
 var (
-	pattern_ServiceA_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a", "1"}, ""))
+	pattern_ServiceA_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a", "1"}, "", false))
 
-	pattern_ServiceA_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a", "2"}, ""))
+	pattern_ServiceA_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a", "2"}, "", false))
 )
 
 var (
@@ -452,9 +452,9 @@ func RegisterServiceCHandlerClient(ctx context.Context, mux *runtime.ServeMux, c
 }
 
 var (
-	pattern_ServiceC_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "c", "1"}, ""))
+	pattern_ServiceC_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "c", "1"}, "", false))
 
-	pattern_ServiceC_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "c", "2"}, ""))
+	pattern_ServiceC_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "c", "2"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/openapi_merge_b.pb.gw.go b/examples/internal/proto/examplepb/openapi_merge_b.pb.gw.go
index ff1431529fd..d8783ec1818 100644
--- a/examples/internal/proto/examplepb/openapi_merge_b.pb.gw.go
+++ b/examples/internal/proto/examplepb/openapi_merge_b.pb.gw.go
@@ -236,9 +236,9 @@ func RegisterServiceBHandlerClient(ctx context.Context, mux *runtime.ServeMux, c
 }
 
 var (
-	pattern_ServiceB_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "b", "1"}, ""))
+	pattern_ServiceB_MethodOne_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "b", "1"}, "", false))
 
-	pattern_ServiceB_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "b", "2"}, ""))
+	pattern_ServiceB_MethodTwo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "b", "2"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/response_body_service.pb.gw.go b/examples/internal/proto/examplepb/response_body_service.pb.gw.go
index 95f549313c0..9936fec4e6a 100644
--- a/examples/internal/proto/examplepb/response_body_service.pb.gw.go
+++ b/examples/internal/proto/examplepb/response_body_service.pb.gw.go
@@ -467,13 +467,13 @@ func (m response_ResponseBodyService_GetResponseBodyStream_0) XXX_ResponseBody()
 }
 
 var (
-	pattern_ResponseBodyService_GetResponseBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsebody", "data"}, ""))
+	pattern_ResponseBodyService_GetResponseBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsebody", "data"}, "", false))
 
-	pattern_ResponseBodyService_ListResponseBodies_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsebodies", "data"}, ""))
+	pattern_ResponseBodyService_ListResponseBodies_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsebodies", "data"}, "", false))
 
-	pattern_ResponseBodyService_ListResponseStrings_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsestrings", "data"}, ""))
+	pattern_ResponseBodyService_ListResponseStrings_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 1, 0, 4, 1, 5, 1}, []string{"responsestrings", "data"}, "", false))
 
-	pattern_ResponseBodyService_GetResponseBodyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"responsebody", "stream", "data"}, ""))
+	pattern_ResponseBodyService_GetResponseBodyStream_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 1, 0, 4, 1, 5, 2}, []string{"responsebody", "stream", "data"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/stream.pb.gw.go b/examples/internal/proto/examplepb/stream.pb.gw.go
index 6654f7366ca..4c86357653b 100644
--- a/examples/internal/proto/examplepb/stream.pb.gw.go
+++ b/examples/internal/proto/examplepb/stream.pb.gw.go
@@ -322,13 +322,13 @@ func RegisterStreamServiceHandlerClient(ctx context.Context, mux *runtime.ServeM
 }
 
 var (
-	pattern_StreamService_BulkCreate_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a_bit_of_everything", "bulk"}, ""))
+	pattern_StreamService_BulkCreate_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a_bit_of_everything", "bulk"}, "", false))
 
-	pattern_StreamService_List_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "a_bit_of_everything"}, ""))
+	pattern_StreamService_List_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "a_bit_of_everything"}, "", false))
 
-	pattern_StreamService_BulkEcho_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a_bit_of_everything", "echo"}, ""))
+	pattern_StreamService_BulkEcho_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 2, 3}, []string{"v1", "example", "a_bit_of_everything", "echo"}, "", false))
 
-	pattern_StreamService_Download_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "download"}, ""))
+	pattern_StreamService_Download_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "download"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/unannotated_echo_service.pb.gw.go b/examples/internal/proto/examplepb/unannotated_echo_service.pb.gw.go
index 8670a575b47..0b446b2b82c 100644
--- a/examples/internal/proto/examplepb/unannotated_echo_service.pb.gw.go
+++ b/examples/internal/proto/examplepb/unannotated_echo_service.pb.gw.go
@@ -484,13 +484,13 @@ func RegisterUnannotatedEchoServiceHandlerClient(ctx context.Context, mux *runti
 }
 
 var (
-	pattern_UnannotatedEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo", "id"}, ""))
+	pattern_UnannotatedEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v1", "example", "echo", "id"}, "", false))
 
-	pattern_UnannotatedEchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "echo", "id", "num"}, ""))
+	pattern_UnannotatedEchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v1", "example", "echo", "id", "num"}, "", false))
 
-	pattern_UnannotatedEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_body"}, ""))
+	pattern_UnannotatedEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_body"}, "", false))
 
-	pattern_UnannotatedEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_delete"}, ""))
+	pattern_UnannotatedEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "echo_delete"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/use_go_template.pb.gw.go b/examples/internal/proto/examplepb/use_go_template.pb.gw.go
index 1eaccc6201f..b14a9cf2229 100644
--- a/examples/internal/proto/examplepb/use_go_template.pb.gw.go
+++ b/examples/internal/proto/examplepb/use_go_template.pb.gw.go
@@ -236,9 +236,9 @@ func RegisterLoginServiceHandlerClient(ctx context.Context, mux *runtime.ServeMu
 }
 
 var (
-	pattern_LoginService_Login_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "login"}, ""))
+	pattern_LoginService_Login_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "login"}, "", false))
 
-	pattern_LoginService_Logout_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "logout"}, ""))
+	pattern_LoginService_Logout_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "logout"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/examplepb/wrappers.pb.gw.go b/examples/internal/proto/examplepb/wrappers.pb.gw.go
index 33470d816c0..d2555333446 100644
--- a/examples/internal/proto/examplepb/wrappers.pb.gw.go
+++ b/examples/internal/proto/examplepb/wrappers.pb.gw.go
@@ -931,27 +931,27 @@ func RegisterWrappersServiceHandlerClient(ctx context.Context, mux *runtime.Serv
 }
 
 var (
-	pattern_WrappersService_Create_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "wrappers"}, ""))
+	pattern_WrappersService_Create_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v1", "example", "wrappers"}, "", false))
 
-	pattern_WrappersService_CreateStringValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testString"}, ""))
+	pattern_WrappersService_CreateStringValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testString"}, "", false))
 
-	pattern_WrappersService_CreateInt32Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testInt32"}, ""))
+	pattern_WrappersService_CreateInt32Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testInt32"}, "", false))
 
-	pattern_WrappersService_CreateInt64Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testInt64"}, ""))
+	pattern_WrappersService_CreateInt64Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testInt64"}, "", false))
 
-	pattern_WrappersService_CreateFloatValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testFloat"}, ""))
+	pattern_WrappersService_CreateFloatValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testFloat"}, "", false))
 
-	pattern_WrappersService_CreateDoubleValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testDouble"}, ""))
+	pattern_WrappersService_CreateDoubleValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testDouble"}, "", false))
 
-	pattern_WrappersService_CreateBoolValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testBool"}, ""))
+	pattern_WrappersService_CreateBoolValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testBool"}, "", false))
 
-	pattern_WrappersService_CreateUInt32Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testUint32"}, ""))
+	pattern_WrappersService_CreateUInt32Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testUint32"}, "", false))
 
-	pattern_WrappersService_CreateUInt64Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testUint64"}, ""))
+	pattern_WrappersService_CreateUInt64Value_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testUint64"}, "", false))
 
-	pattern_WrappersService_CreateBytesValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testBytes"}, ""))
+	pattern_WrappersService_CreateBytesValue_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testBytes"}, "", false))
 
-	pattern_WrappersService_CreateEmpty_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testEmpty"}, ""))
+	pattern_WrappersService_CreateEmpty_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1}, []string{"v1", "testEmpty"}, "", false))
 )
 
 var (
diff --git a/examples/internal/proto/standalone/unannotated_echo_service.pb.gw.go b/examples/internal/proto/standalone/unannotated_echo_service.pb.gw.go
index d05cbaef6b4..ea7739b926b 100644
--- a/examples/internal/proto/standalone/unannotated_echo_service.pb.gw.go
+++ b/examples/internal/proto/standalone/unannotated_echo_service.pb.gw.go
@@ -924,19 +924,19 @@ func RegisterUnannotatedEchoServiceHandlerClient(ctx context.Context, mux *runti
 }
 
 var (
-	pattern_UnannotatedEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "echo", "id"}, ""))
+	pattern_UnannotatedEchoService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "echo", "id"}, "", false))
 
-	pattern_UnannotatedEchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v2", "example", "echo", "id", "num"}, ""))
+	pattern_UnannotatedEchoService_Echo_1 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4}, []string{"v2", "example", "echo", "id", "num"}, "", false))
 
-	pattern_UnannotatedEchoService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v2", "example", "echo", "id", "num", "lang"}, ""))
+	pattern_UnannotatedEchoService_Echo_2 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v2", "example", "echo", "id", "num", "lang"}, "", false))
 
-	pattern_UnannotatedEchoService_Echo_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v2", "example", "echo1", "id", "line_num", "status.note"}, ""))
+	pattern_UnannotatedEchoService_Echo_3 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3, 1, 0, 4, 1, 5, 4, 1, 0, 4, 1, 5, 5}, []string{"v2", "example", "echo1", "id", "line_num", "status.note"}, "", false))
 
-	pattern_UnannotatedEchoService_Echo_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "echo2", "no.note"}, ""))
+	pattern_UnannotatedEchoService_Echo_4 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2, 1, 0, 4, 1, 5, 3}, []string{"v2", "example", "echo2", "no.note"}, "", false))
 
-	pattern_UnannotatedEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo_body"}, ""))
+	pattern_UnannotatedEchoService_EchoBody_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo_body"}, "", false))
 
-	pattern_UnannotatedEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo_delete"}, ""))
+	pattern_UnannotatedEchoService_EchoDelete_0 = runtime.MustPattern(runtime.NewPattern(1, []int{2, 0, 2, 1, 2, 2}, []string{"v2", "example", "echo_delete"}, "", false))
 )
 
 var (
diff --git a/go.mod b/go.mod
index 72fedab057c..915e0873687 100644
--- a/go.mod
+++ b/go.mod
@@ -3,14 +3,14 @@ module github.com/grpc-ecosystem/grpc-gateway/v2
 go 1.14
 
 require (
-	github.com/antihax/optional v1.0.0
+	github.com/antihax/optional v1.0.0 // indirect
 	github.com/bufbuild/buf v0.37.0
 	github.com/ghodss/yaml v1.0.0
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/golang/protobuf v1.5.2
 	github.com/google/go-cmp v0.5.5
 	github.com/rogpeppe/fastuuid v1.2.0
-	golang.org/x/oauth2 v0.0.0-20210413134643-5e61552d6c78
+	golang.org/x/oauth2 v0.0.0-20210413134643-5e61552d6c78 // indirect
 	google.golang.org/genproto v0.0.0-20210416161957-9910b6c460de
 	google.golang.org/grpc v1.37.0
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.0.0
diff --git a/go.sum b/go.sum
index b7fd5c2c5e4..b536d4a9e66 100644
--- a/go.sum
+++ b/go.sum
@@ -157,6 +157,7 @@ github.com/grpc-ecosystem/go-grpc-middleware v1.0.0/go.mod h1:FiyG127CGDf3tlThmg
 github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgfV/d3M/q6VIi02HzZEHgUlZvzk=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0 h1:bM6ZAFZmc/wPFaRDi0d5L7hGEZEx/2u+Tmr2evNHDiI=
 github.com/grpc-ecosystem/grpc-gateway v1.9.0/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
+github.com/grpc-ecosystem/grpc-gateway v1.16.0 h1:gmcG1KaJ57LophUzW0Hy8NmPhnMZb4M0+kPpLofRdBo=
 github.com/hashicorp/consul/api v1.1.0/go.mod h1:VmuI/Lkw1nC05EYQWNKwWGbkg+FbDBtguAZLlVdkD9Q=
 github.com/hashicorp/consul/sdk v0.1.1/go.mod h1:VKf9jXwCTEY1QZP2MOLRhb5i/I/ssyNV1vwHyQBF0x8=
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
diff --git a/protoc-gen-grpc-gateway/internal/gengateway/generator.go b/protoc-gen-grpc-gateway/internal/gengateway/generator.go
index 08efcc0b2c0..f39374856bf 100644
--- a/protoc-gen-grpc-gateway/internal/gengateway/generator.go
+++ b/protoc-gen-grpc-gateway/internal/gengateway/generator.go
@@ -24,11 +24,12 @@ type generator struct {
 	registerFuncSuffix string
 	allowPatchFeature  bool
 	standalone         bool
+	ignoreCase         bool
 }
 
 // New returns a new generator which generates grpc gateway files.
 func New(reg *descriptor.Registry, useRequestContext bool, registerFuncSuffix string,
-	allowPatchFeature, standalone bool) gen.Generator {
+	allowPatchFeature, standalone bool, ignoreCase bool) gen.Generator {
 	var imports []descriptor.GoPackage
 	for _, pkgpath := range []string{
 		"context",
@@ -67,6 +68,7 @@ func New(reg *descriptor.Registry, useRequestContext bool, registerFuncSuffix st
 		registerFuncSuffix: registerFuncSuffix,
 		allowPatchFeature:  allowPatchFeature,
 		standalone:         standalone,
+		ignoreCase:         ignoreCase,
 	}
 }
 
@@ -129,6 +131,7 @@ func (g *generator) generate(file *descriptor.File) (string, error) {
 		UseRequestContext:  g.useRequestContext,
 		RegisterFuncSuffix: g.registerFuncSuffix,
 		AllowPatchFeature:  g.allowPatchFeature,
+		IgnoreCase:         g.ignoreCase,
 	}
 	if g.reg != nil {
 		params.OmitPackageDoc = g.reg.GetOmitPackageDoc()
diff --git a/protoc-gen-grpc-gateway/internal/gengateway/template.go b/protoc-gen-grpc-gateway/internal/gengateway/template.go
index 028761ffa5a..33d844fd833 100644
--- a/protoc-gen-grpc-gateway/internal/gengateway/template.go
+++ b/protoc-gen-grpc-gateway/internal/gengateway/template.go
@@ -20,6 +20,7 @@ type param struct {
 	RegisterFuncSuffix string
 	AllowPatchFeature  bool
 	OmitPackageDoc     bool
+	IgnoreCase         bool
 }
 
 type binding struct {
@@ -146,6 +147,7 @@ type trailerParams struct {
 	Services           []*descriptor.Service
 	UseRequestContext  bool
 	RegisterFuncSuffix string
+	IgnoreCase         bool
 }
 
 func applyTemplate(p param, reg *descriptor.Registry) (string, error) {
@@ -201,6 +203,7 @@ func applyTemplate(p param, reg *descriptor.Registry) (string, error) {
 		Services:           targetServices,
 		UseRequestContext:  p.UseRequestContext,
 		RegisterFuncSuffix: p.RegisterFuncSuffix,
+		IgnoreCase:         p.IgnoreCase,
 	}
 	// Local
 	if err := localTrailerTemplate.Execute(w, tp); err != nil {
@@ -628,6 +631,7 @@ func Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server(ctx context.Context,
 
 	trailerTemplate = template.Must(template.New("trailer").Parse(`
 {{$UseRequestContext := .UseRequestContext}}
+{{$IgnoreCase := .IgnoreCase}}
 {{range $svc := .Services}}
 // Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}FromEndpoint is same as Register{{$svc.GetName}}{{$.RegisterFuncSuffix}} but
 // automatically dials to "endpoint" and closes the connection when "ctx" gets done.
@@ -727,7 +731,7 @@ func (m response_{{$svc.GetName}}_{{$m.GetName}}_{{$b.Index}}) XXX_ResponseBody(
 var (
 	{{range $m := $svc.Methods}}
 	{{range $b := $m.Bindings}}
-	pattern_{{$svc.GetName}}_{{$m.GetName}}_{{$b.Index}} = runtime.MustPattern(runtime.NewPattern({{$b.PathTmpl.Version}}, {{$b.PathTmpl.OpCodes | printf "%#v"}}, {{$b.PathTmpl.Pool | printf "%#v"}}, {{$b.PathTmpl.Verb | printf "%q"}}))
+	pattern_{{$svc.GetName}}_{{$m.GetName}}_{{$b.Index}} = runtime.MustPattern(runtime.NewPattern({{$b.PathTmpl.Version}}, {{$b.PathTmpl.OpCodes | printf "%#v"}}, {{$b.PathTmpl.Pool | printf "%#v"}}, {{$b.PathTmpl.Verb | printf "%q"}}, {{$IgnoreCase}}))
 	{{end}}
 	{{end}}
 )
diff --git a/protoc-gen-grpc-gateway/internal/gengateway/template_test.go b/protoc-gen-grpc-gateway/internal/gengateway/template_test.go
index 48ed03239e9..ec8f9e05bbd 100644
--- a/protoc-gen-grpc-gateway/internal/gengateway/template_test.go
+++ b/protoc-gen-grpc-gateway/internal/gengateway/template_test.go
@@ -242,7 +242,7 @@ func TestApplyTemplateRequestWithoutClientStreaming(t *testing.T) {
 		if want := `func RegisterExampleServiceHandler(ctx context.Context, mux *runtime.ServeMux, conn *grpc.ClientConn) error {`; !strings.Contains(got, want) {
 			t.Errorf("applyTemplate(%#v) = %s; want to contain %s", file, got, want)
 		}
-		if want := `pattern_ExampleService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{0, 0}, []string(nil), ""))`; !strings.Contains(got, want) {
+		if want := `pattern_ExampleService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{0, 0}, []string(nil), "", false))`; !strings.Contains(got, want) {
 			t.Errorf("applyTemplate(%#v) = %s; want to contain %s", file, got, want)
 		}
 		if want := `rctx, err := runtime.AnnotateContext(ctx, mux, req, "/example.ExampleService/Echo")`; !strings.Contains(got, want) {
@@ -397,7 +397,7 @@ func TestApplyTemplateRequestWithClientStreaming(t *testing.T) {
 		if want := `func RegisterExampleServiceHandler(ctx context.Context, mux *runtime.ServeMux, conn *grpc.ClientConn) error {`; !strings.Contains(got, want) {
 			t.Errorf("applyTemplate(%#v) = %s; want to contain %s", file, got, want)
 		}
-		if want := `pattern_ExampleService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{0, 0}, []string(nil), ""))`; !strings.Contains(got, want) {
+		if want := `pattern_ExampleService_Echo_0 = runtime.MustPattern(runtime.NewPattern(1, []int{0, 0}, []string(nil), "", false))`; !strings.Contains(got, want) {
 			t.Errorf("applyTemplate(%#v) = %s; want to contain %s", file, got, want)
 		}
 	}
diff --git a/protoc-gen-grpc-gateway/main.go b/protoc-gen-grpc-gateway/main.go
index a8a7c8760e3..33dd615d9f9 100644
--- a/protoc-gen-grpc-gateway/main.go
+++ b/protoc-gen-grpc-gateway/main.go
@@ -34,6 +34,7 @@ var (
 	versionFlag                = flag.Bool("version", false, "print the current version")
 	warnOnUnboundMethods       = flag.Bool("warn_on_unbound_methods", false, "emit a warning message if an RPC method has no HttpRule annotation")
 	generateUnboundMethods     = flag.Bool("generate_unbound_methods", false, "generate proxy methods even for RPC methods that have no HttpRule annotation")
+	ignoreCase                 = flag.Bool("ignore_case", false, "ignore case in route pattern matching")
 )
 
 // Variables set by goreleaser at build time
@@ -64,7 +65,7 @@ func main() {
 
 		codegenerator.SetSupportedFeaturesOnPluginGen(gen)
 
-		generator := gengateway.New(reg, *useRequestContext, *registerFuncSuffix, *allowPatchFeature, *standalone)
+		generator := gengateway.New(reg, *useRequestContext, *registerFuncSuffix, *allowPatchFeature, *standalone, *ignoreCase)
 
 		glog.V(1).Infof("Parsing code generator request")
 
diff --git a/runtime/marshal_proto.go b/runtime/marshal_proto.go
index 007f8f1a2c7..d6daf2bb10e 100644
--- a/runtime/marshal_proto.go
+++ b/runtime/marshal_proto.go
@@ -1,9 +1,8 @@
 package runtime
 
 import (
-	"io"
-
 	"errors"
+	"io"
 	"io/ioutil"
 
 	"google.golang.org/protobuf/proto"
diff --git a/runtime/mux.go b/runtime/mux.go
index 10fd357b1e3..464e6b8cf23 100644
--- a/runtime/mux.go
+++ b/runtime/mux.go
@@ -185,7 +185,7 @@ func (s *ServeMux) HandlePath(meth string, pathPattern string, h HandlerFunc) er
 		return fmt.Errorf("parsing path pattern: %w", err)
 	}
 	tp := compiler.Compile()
-	pattern, err := NewPattern(tp.Version, tp.OpCodes, tp.Pool, tp.Verb)
+	pattern, err := NewPattern(tp.Version, tp.OpCodes, tp.Pool, tp.Verb, false)
 	if err != nil {
 		return fmt.Errorf("creating new pattern: %w", err)
 	}
diff --git a/runtime/mux_test.go b/runtime/mux_test.go
index d5aa7c759b0..48319bf6f6a 100644
--- a/runtime/mux_test.go
+++ b/runtime/mux_test.go
@@ -339,7 +339,7 @@ func TestMuxServeHTTP(t *testing.T) {
 			mux := runtime.NewServeMux(opts...)
 			for _, p := range spec.patterns {
 				func(p stubPattern) {
-					pat, err := runtime.NewPattern(1, p.ops, p.pool, p.verb)
+					pat, err := runtime.NewPattern(1, p.ops, p.pool, p.verb, false)
 					if err != nil {
 						t.Fatalf("runtime.NewPattern(1, %#v, %#v, %q) failed with %v; want success", p.ops, p.pool, p.verb, err)
 					}
diff --git a/runtime/pattern.go b/runtime/pattern.go
index 14c06dcc3f6..2e97673c12a 100644
--- a/runtime/pattern.go
+++ b/runtime/pattern.go
@@ -36,6 +36,8 @@ type Pattern struct {
 	tailLen int
 	// verb is the VERB part of the path pattern. It is empty if the pattern does not have VERB part.
 	verb string
+	// ignoreCase defines whether the pattern matching is case sensitive or not
+	ignoreCase bool
 }
 
 // NewPattern returns a new Pattern from the given definition values.
@@ -43,7 +45,7 @@ type Pattern struct {
 // "verb" is the verb part of the pattern. It is empty if the pattern does not have the part.
 // "version" must be 1 for now.
 // It returns an error if the given definition is invalid.
-func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, error) {
+func NewPattern(version int, ops []int, pool []string, verb string, ignoreCase bool) (Pattern, error) {
 	if version != 1 {
 		grpclog.Infof("unsupported version: %d", version)
 		return Pattern{}, ErrInvalidPattern
@@ -123,12 +125,13 @@ func NewPattern(version int, ops []int, pool []string, verb string) (Pattern, er
 		typedOps = append(typedOps, op)
 	}
 	return Pattern{
-		ops:       typedOps,
-		pool:      pool,
-		vars:      vars,
-		stacksize: maxstack,
-		tailLen:   tailLen,
-		verb:      verb,
+		ops:        typedOps,
+		pool:       pool,
+		vars:       vars,
+		stacksize:  maxstack,
+		tailLen:    tailLen,
+		verb:       verb,
+		ignoreCase: ignoreCase,
 	}, nil
 }
 
@@ -170,7 +173,7 @@ func (p Pattern) Match(components []string, verb string) (map[string]string, err
 			}
 			c := components[pos]
 			if op.code == utilities.OpLitPush {
-				if lit := p.pool[op.operand]; c != lit {
+				if lit := p.pool[op.operand]; !p.literalEqual(c, lit) {
 					return nil, ErrNotMatch
 				}
 			}
@@ -234,3 +237,10 @@ func (p Pattern) String() string {
 	}
 	return "/" + segs
 }
+
+func (p Pattern) literalEqual(component, literal string) bool {
+	if p.ignoreCase {
+		return strings.EqualFold(component, literal)
+	}
+	return component == literal
+}
diff --git a/runtime/pattern_test.go b/runtime/pattern_test.go
index 1b856a512a4..03cc70537b4 100644
--- a/runtime/pattern_test.go
+++ b/runtime/pattern_test.go
@@ -16,9 +16,10 @@ const (
 
 func TestNewPattern(t *testing.T) {
 	for _, spec := range []struct {
-		ops  []int
-		pool []string
-		verb string
+		ops        []int
+		pool       []string
+		verb       string
+		ignoreCase bool
 
 		stackSizeWant, tailLenWant int
 	}{
@@ -109,7 +110,7 @@ func TestNewPattern(t *testing.T) {
 			tailLenWant:   0,
 		},
 	} {
-		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb)
+		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb, spec.ignoreCase)
 		if err != nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) failed with %v; want success", validVersion, spec.ops, spec.pool, spec.verb, err)
 			continue
@@ -176,7 +177,7 @@ func TestNewPatternWithWrongOp(t *testing.T) {
 			pool: []string{"abc"},
 		},
 	} {
-		_, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb)
+		_, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb, false)
 		if err == nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) succeeded; want failure with %v", validVersion, spec.ops, spec.pool, spec.verb, ErrInvalidPattern)
 			continue
@@ -202,7 +203,7 @@ func TestNewPatternWithStackUnderflow(t *testing.T) {
 			pool: []string{"abc"},
 		},
 	} {
-		_, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb)
+		_, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb, false)
 		if err == nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) succeeded; want failure with %v", validVersion, spec.ops, spec.pool, spec.verb, ErrInvalidPattern)
 			continue
@@ -216,9 +217,10 @@ func TestNewPatternWithStackUnderflow(t *testing.T) {
 
 func TestMatch(t *testing.T) {
 	for _, spec := range []struct {
-		ops  []int
-		pool []string
-		verb string
+		ops        []int
+		pool       []string
+		verb       string
+		ignoreCase bool
 
 		match    []string
 		notMatch []string
@@ -325,6 +327,39 @@ func TestMatch(t *testing.T) {
 				"v2/b",
 				"v2/b/my-bucket",
 				"v2/b/my-bucket/o",
+				// case sensitive
+				"V2/b/my-bucket/o/obj",
+				"v2/b/our-bucket/O/obj",
+			},
+		},
+		{
+			ignoreCase: true,
+			ops: []int{
+				int(utilities.OpLitPush), 0,
+				int(utilities.OpLitPush), 1,
+				int(utilities.OpPush), anything,
+				int(utilities.OpConcatN), 2,
+				int(utilities.OpCapture), 2,
+				int(utilities.OpLitPush), 3,
+				int(utilities.OpPush), anything,
+				int(utilities.OpConcatN), 1,
+				int(utilities.OpCapture), 4,
+			},
+			pool: []string{"v2", "b", "name", "o", "oname"},
+			match: []string{
+				"v2/b/my-bucket/o/obj",
+				"v2/b/our-bucket/o/obj",
+				"V2/b/my-bucket/O/obj",
+				"V2/b/my-bucket/O/dir",
+			},
+			notMatch: []string{
+				"",
+				"v2",
+				"v2/b",
+				"v2/b/my-bucket",
+				"v2/b/my-bucket/o",
+				"V2/b/my-bucket",
+				"V2/b/my-bucket/o",
 			},
 		},
 		{
@@ -335,7 +370,7 @@ func TestMatch(t *testing.T) {
 			notMatch: []string{"v1", "LOCK"},
 		},
 	} {
-		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb)
+		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb, spec.ignoreCase)
 		if err != nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) failed with %v; want success", validVersion, spec.ops, spec.pool, spec.verb, err)
 			continue
@@ -478,7 +513,7 @@ func TestMatchWithBinding(t *testing.T) {
 			},
 		},
 	} {
-		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb)
+		pat, err := NewPattern(validVersion, spec.ops, spec.pool, spec.verb, false)
 		if err != nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) failed with %v; want success", validVersion, spec.ops, spec.pool, spec.verb, err)
 			continue
@@ -568,7 +603,7 @@ func TestPatternString(t *testing.T) {
 			want: "/v1/{bucket_name=buckets/*}/{name=objects/**/.ext}/tail",
 		},
 	} {
-		p, err := NewPattern(validVersion, spec.ops, spec.pool, "")
+		p, err := NewPattern(validVersion, spec.ops, spec.pool, "", false)
 		if err != nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) failed with %v; want success", validVersion, spec.ops, spec.pool, "", err)
 			continue
@@ -578,7 +613,7 @@ func TestPatternString(t *testing.T) {
 		}
 
 		verb := "LOCK"
-		p, err = NewPattern(validVersion, spec.ops, spec.pool, verb)
+		p, err = NewPattern(validVersion, spec.ops, spec.pool, verb, false)
 		if err != nil {
 			t.Errorf("NewPattern(%d, %v, %q, %q) failed with %v; want success", validVersion, spec.ops, spec.pool, verb, err)
 			continue