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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Utility functions to convert between protobuf binary format and proto3 JSON
// format.
#ifndef GOOGLE_PROTOBUF_UTIL_JSON_UTIL_H__
#define GOOGLE_PROTOBUF_UTIL_JSON_UTIL_H__
#include <google/protobuf/message.h>
#include <google/protobuf/util/type_resolver.h>
#include <google/protobuf/stubs/bytestream.h>
namespace google {
namespace protobuf {
namespace io {
class ZeroCopyInputStream;
class ZeroCopyOutputStream;
} // namespace io
namespace util {
struct JsonParseOptions {
// Whether to ignore unknown JSON fields during parsing
bool ignore_unknown_fields;
JsonParseOptions() : ignore_unknown_fields(false) {}
};
struct JsonPrintOptions {
// Whether to add spaces, line breaks and indentation to make the JSON output
// easy to read.
bool add_whitespace;
// Whether to always print primitive fields. By default primitive fields with
// default values will be omitted in JSON joutput. For example, an int32 field
// set to 0 will be omitted. Set this flag to true will override the default
// behavior and print primitive fields regardless of their values.
bool always_print_primitive_fields;
// Whether to always print enums as ints. By default they are rendered as
// strings.
bool always_print_enums_as_ints;
// Whether to preserve proto field names
bool preserve_proto_field_names;
JsonPrintOptions()
: add_whitespace(false),
always_print_primitive_fields(false),
always_print_enums_as_ints(false),
preserve_proto_field_names(false) {}
};
// DEPRECATED. Use JsonPrintOptions instead.
typedef JsonPrintOptions JsonOptions;
// Converts from protobuf message to JSON. This is a simple wrapper of
// BinaryToJsonString(). It will use the DescriptorPool of the passed-in
// message to resolve Any types.
LIBPROTOBUF_EXPORT util::Status MessageToJsonString(const Message& message,
string* output,
const JsonOptions& options);
inline util::Status MessageToJsonString(const Message& message,
string* output) {
return MessageToJsonString(message, output, JsonOptions());
}
// Converts from JSON to protobuf message. This is a simple wrapper of
// JsonStringToBinary(). It will use the DescriptorPool of the passed-in
// message to resolve Any types.
LIBPROTOBUF_EXPORT util::Status JsonStringToMessage(const string& input,
Message* message,
const JsonParseOptions& options);
inline util::Status JsonStringToMessage(const string& input,
Message* message) {
return JsonStringToMessage(input, message, JsonParseOptions());
}
// Converts protobuf binary data to JSON.
// The conversion will fail if:
// 1. TypeResolver fails to resolve a type.
// 2. input is not valid protobuf wire format, or conflicts with the type
// information returned by TypeResolver.
// Note that unknown fields will be discarded silently.
LIBPROTOBUF_EXPORT util::Status BinaryToJsonStream(
TypeResolver* resolver,
const string& type_url,
io::ZeroCopyInputStream* binary_input,
io::ZeroCopyOutputStream* json_output,
const JsonPrintOptions& options);
inline util::Status BinaryToJsonStream(
TypeResolver* resolver, const string& type_url,
io::ZeroCopyInputStream* binary_input,
io::ZeroCopyOutputStream* json_output) {
return BinaryToJsonStream(resolver, type_url, binary_input, json_output,
JsonPrintOptions());
}
LIBPROTOBUF_EXPORT util::Status BinaryToJsonString(
TypeResolver* resolver,
const string& type_url,
const string& binary_input,
string* json_output,
const JsonPrintOptions& options);
inline util::Status BinaryToJsonString(TypeResolver* resolver,
const string& type_url,
const string& binary_input,
string* json_output) {
return BinaryToJsonString(resolver, type_url, binary_input, json_output,
JsonPrintOptions());
}
// Converts JSON data to protobuf binary format.
// The conversion will fail if:
// 1. TypeResolver fails to resolve a type.
// 2. input is not valid JSON format, or conflicts with the type
// information returned by TypeResolver.
LIBPROTOBUF_EXPORT util::Status JsonToBinaryStream(
TypeResolver* resolver,
const string& type_url,
io::ZeroCopyInputStream* json_input,
io::ZeroCopyOutputStream* binary_output,
const JsonParseOptions& options);
inline util::Status JsonToBinaryStream(
TypeResolver* resolver,
const string& type_url,
io::ZeroCopyInputStream* json_input,
io::ZeroCopyOutputStream* binary_output) {
return JsonToBinaryStream(resolver, type_url, json_input, binary_output,
JsonParseOptions());
}
LIBPROTOBUF_EXPORT util::Status JsonToBinaryString(
TypeResolver* resolver,
const string& type_url,
const string& json_input,
string* binary_output,
const JsonParseOptions& options);
inline util::Status JsonToBinaryString(
TypeResolver* resolver,
const string& type_url,
const string& json_input,
string* binary_output) {
return JsonToBinaryString(resolver, type_url, json_input, binary_output,
JsonParseOptions());
}
namespace internal {
// Internal helper class. Put in the header so we can write unit-tests for it.
class LIBPROTOBUF_EXPORT ZeroCopyStreamByteSink : public strings::ByteSink {
public:
explicit ZeroCopyStreamByteSink(io::ZeroCopyOutputStream* stream)
: stream_(stream), buffer_size_(0) {}
~ZeroCopyStreamByteSink();
virtual void Append(const char* bytes, size_t len);
private:
io::ZeroCopyOutputStream* stream_;
void* buffer_;
int buffer_size_;
GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ZeroCopyStreamByteSink);
};
} // namespace internal
} // namespace util
} // namespace protobuf
} // namespace google
#endif // GOOGLE_PROTOBUF_UTIL_JSON_UTIL_H__
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