Add JsonStreamToMessage method

PiperOrigin-RevId: 670707551

src/google/protobuf/json/internal/parser.cc

@@ -1271,14 +1271,11 @@ absl::Status ParseMessage(JsonLexer& lex, const Desc<Traits>& desc,
 }
 }  // namespace
 
-absl::Status JsonStringToMessage(absl::string_view input, Message* message,
+absl::Status JsonStreamToMessage(io::ZeroCopyInputStream* input,
+                                 Message* message,
                                  json_internal::ParseOptions options) {
   MessagePath path(message->GetDescriptor()->full_name());
-  if (PROTOBUF_DEBUG) {
-    ABSL_DLOG(INFO) << "json2/input: " << absl::CHexEscape(input);
-  }
-  io::ArrayInputStream in(input.data(), input.size());
-  JsonLexer lex(&in, options, &path);
+  JsonLexer lex(input, options, &path);
 
   ParseProto2Descriptor::Msg msg(message);
   absl::Status s =
@@ -1360,3 +1357,5 @@ absl::Status JsonToBinaryStream(google::protobuf::util::TypeResolver* resolver,
 }  // namespace json_internal
 }  // namespace protobuf
 }  // namespace google
+
+#include "google/protobuf/port_undef.inc"

src/google/protobuf/json/internal/parser.h

@@ -10,17 +10,17 @@
 
 #include <string>
 
-#include "absl/strings/string_view.h"
 #include "google/protobuf/json/internal/lexer.h"
 #include "google/protobuf/message.h"
 #include "google/protobuf/util/type_resolver.h"
 
 namespace google {
 namespace protobuf {
 namespace json_internal {
-// Internal version of google::protobuf::util::JsonStringToMessage; see json_util.h for
+// Internal version of google::protobuf::util::JsonStreamToMessage; see json_util.h for
 // details.
-absl::Status JsonStringToMessage(absl::string_view input, Message* message,
+absl::Status JsonStreamToMessage(io::ZeroCopyInputStream* input,
+                                 Message* message,
                                  json_internal::ParseOptions options);
 // Internal version of google::protobuf::util::JsonToBinaryStream; see json_util.h for
 // details.

src/google/protobuf/json/json.cc

@@ -100,15 +100,24 @@ absl::Status MessageToJsonString(const Message& message, std::string* output,
 
 absl::Status JsonStringToMessage(absl::string_view input, Message* message,
                                  const ParseOptions& options) {
+  io::ArrayInputStream input_stream(input.data(), input.size());
+  return JsonStreamToMessage(&input_stream, message, options);
+}
+
+absl::Status JsonStreamToMessage(io::ZeroCopyInputStream* input,
+                                 Message* message,
+                                 const ParseOptions& options) {
   google::protobuf::json_internal::ParseOptions opts;
   opts.ignore_unknown_fields = options.ignore_unknown_fields;
   opts.case_insensitive_enum_parsing = options.case_insensitive_enum_parsing;
 
   // TODO: Drop this setting.
   opts.allow_legacy_syntax = true;
 
-  return google::protobuf::json_internal::JsonStringToMessage(input, message, opts);
+  return google::protobuf::json_internal::JsonStreamToMessage(input, message, opts);
 }
 }  // namespace json
 }  // namespace protobuf
 }  // namespace google
+
+#include "google/protobuf/port_undef.inc"

src/google/protobuf/json/json.h

@@ -69,7 +69,7 @@ inline absl::Status MessageToJsonString(const Message& message,
   return MessageToJsonString(message, output, PrintOptions());
 }
 
-// Converts from JSON to protobuf message. This works equivalently to
+// Converts from JSON string to protobuf message. This works equivalently to
 // JsonToBinaryStream(). It will use the DescriptorPool of the passed-in
 // message to resolve Any types.
 //
@@ -84,6 +84,20 @@ inline absl::Status JsonStringToMessage(absl::string_view input,
   return JsonStringToMessage(input, message, ParseOptions());
 }
 
+// Converts from JSON stream to protobuf message. Similar to JsonStringToMessage
+// but with input stream.
+//
+// Please note that non-OK statuses are not a stable output of this API and
+// subject to change without notice.
+PROTOBUF_EXPORT absl::Status JsonStreamToMessage(io::ZeroCopyInputStream* input,
+                                                 Message* message,
+                                                 const ParseOptions& options);
+
+inline absl::Status JsonStreamToMessage(io::ZeroCopyInputStream* input,
+                                        Message* message) {
+  return JsonStreamToMessage(input, message, ParseOptions());
+}
+
 // Converts protobuf binary data to JSON.
 // The conversion will fail if:
 //   1. TypeResolver fails to resolve a type.