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#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/messagext.h>
#include <google/protobuf/text_format.h>
#include <util/ysaveload.h>
#include <util/generic/yexception.h>
#include <util/stream/length.h>
namespace {
const int MaxSizeBytes = 1 << 27; // 128 MB limits the size of a protobuf message processed by TProtoSerializer
}
namespace google::protobuf {
//defined in message_lite.cc
TProtoStringType InitializationErrorMessage(const char* action, const MessageLite& message);
} // namespace google::protobuf
namespace google::protobuf::internal {
IOutputStream& operator <<(IOutputStream& output, const internal::TAsBinary& wrappedMessage) {
bool success = wrappedMessage.Message_.SerializeToArcadiaStream(&output);
if (Y_UNLIKELY(!success)) {
ythrow yexception() << "Cannot serialize a protobuf with AsBinary() (required fields missing?)";
}
return output;
}
IOutputStream& operator <<(IOutputStream& output, const internal::TAsStreamSeq& wrappedMessage) {
::Save(&output, wrappedMessage.Message_);
return output;
}
} // namespace google::protobuf::internal
namespace google::protobuf::io {
bool ParseFromCodedStreamSeq(Message* msg, io::CodedInputStream* input) {
msg->Clear();
ui32 size;
if (!input->ReadVarint32(&size)) {
return false;
}
io::CodedInputStream::Limit limitState = input->PushLimit(size);
bool res = msg->ParseFromCodedStream(input);
input->PopLimit(limitState);
return res;
}
bool ParseFromZeroCopyStreamSeq(Message* msg, io::ZeroCopyInputStream* input) {
io::CodedInputStream decoder(input);
return ParseFromCodedStreamSeq(msg, &decoder);
}
bool SerializePartialToCodedStreamSeq(const Message* msg, io::CodedOutputStream* output) {
uint32 size = msg->ByteSize(); // Force size to be cached.
output->WriteVarint32(size);
msg->SerializeWithCachedSizes(output);
return !output->HadError();
}
bool SerializeToCodedStreamSeq(const Message* msg, io::CodedOutputStream* output) {
GOOGLE_DCHECK(msg->IsInitialized()) << InitializationErrorMessage("serialize", *msg);
return SerializePartialToCodedStreamSeq(msg, output);
}
bool SerializeToZeroCopyStreamSeq(const Message* msg, io::ZeroCopyOutputStream* output) {
io::CodedOutputStream encoder(output);
return SerializeToCodedStreamSeq(msg, &encoder);
}
int TInputStreamProxy::Read(void* buffer, int size) {
try {
return (int)mSlave->Read(buffer, (size_t)size);
} catch (const yexception& e) {
GOOGLE_LOG(ERROR) << e.what();
} catch (...) {
GOOGLE_LOG(ERROR) << "unknown exception caught";
}
TErrorState::SetError();
return -1;
}
bool TOutputStreamProxy::Write(const void* buffer, int size) {
try {
mSlave->Write(buffer, (size_t)size);
return true;
} catch (const yexception& e) {
GOOGLE_LOG(ERROR) << e.what();
} catch (...) {
GOOGLE_LOG(ERROR) << "unknown exception caught";
}
TErrorState::SetError();
return false;
}
void TProtoSerializer::Save(IOutputStream* out, const Message& msg) {
int size = msg.ByteSize();
if (size > MaxSizeBytes) {
ythrow yexception() << "Message size " << size << " exceeds " << MaxSizeBytes;
}
TCopyingOutputStreamAdaptor adaptor(out);
io::CodedOutputStream encoder(&adaptor);
if (!SerializeToCodedStreamSeq(&msg, &encoder))
ythrow yexception() << "Cannot write protobuf::Message to output stream";
}
// Reading varint32 directly from IInputStream (might be slow if input requires buffering).
// Copy-pasted with small modifications from protobuf/io/coded_stream (ReadVarint32FromArray)
// Returns true if succeeded, false if stream has ended, throws exception if data is corrupted
static bool ReadVarint32(IInputStream* input, ui32& size) {
size_t res;
ui8 b;
/* if we can't read anything from stream - it is exhausted */
if (input->Read(&b, 1) == 0)
return false;
res = (b & 0x7F) ; if (!(b & 0x80)) goto done;
::Load(input, b); res |= (b & 0x7F) << 7; if (!(b & 0x80)) goto done;
::Load(input, b); res |= (b & 0x7F) << 14; if (!(b & 0x80)) goto done;
::Load(input, b); res |= (b & 0x7F) << 21; if (!(b & 0x80)) goto done;
::Load(input, b); res |= b << 28; if (!(b & 0x80)) goto done;
// If the input is larger than 32 bits, we still need to read it all
// and discard the high-order bits.
for (int i = 0; i < 5; i++) {
::Load(input, b); if (!(b & 0x80)) goto done;
}
ythrow yexception() << "We have overrun the maximum size of a varint (10 bytes). Assume the data is corrupt.";
done:
size = res;
return true;
}
class TTempBufHelper {
public:
TTempBufHelper(size_t size) {
if (size <= SmallBufSize) {
Buffer = SmallBuf;
} else {
LargeBuf.Reset(new TTempBuf(size));
Buffer = reinterpret_cast<ui8*>(LargeBuf->Data());
}
}
ui8* Data() {
return Buffer;
}
private:
static const size_t SmallBufSize = 1024;
ui8 SmallBuf[SmallBufSize];
THolder<TTempBuf> LargeBuf;
ui8* Buffer;
};
void TProtoSerializer::Load(IInputStream* input, Message& msg) {
msg.Clear();
MergeFrom(input, msg);
}
void TProtoSerializer::MergeFrom(IInputStream* input, Message& msg) {
ui32 size;
if (!ReadVarint32(input, size))
ythrow yexception() << "Stream is exhausted";
TTempBufHelper buf(size);
::LoadPodArray(input, buf.Data(), size);
CodedInputStream decoder(buf.Data(), size);
decoder.SetTotalBytesLimit(MaxSizeBytes);
if (!msg.MergeFromCodedStream(&decoder))
ythrow yexception() << "Cannot read protobuf::Message (" << msg.GetTypeName() << ") from input stream";
}
TProtoReader::TProtoReader(IInputStream* input, const size_t bufferSize)
: IStream(input)
, Buffer(bufferSize)
{
}
bool TProtoReader::Load(Message& msg) {
ui32 size;
if (!ReadVarint32(IStream, size))
return false;
Buffer.Reserve(size);
::LoadPodArray(IStream, Buffer.Data(), size);
CodedInputStream decoder((const ui8*)Buffer.Data(), size);
if (!msg.ParseFromCodedStream(&decoder))
ythrow yexception() << "Cannot read protobuf::Message from input stream";
return true;
}
} // namespace google::protobuf::io
TProtoStringType ShortUtf8DebugString(const google::protobuf::Message& msg) {
google::protobuf::TextFormat::Printer printer;
printer.SetSingleLineMode(true);
printer.SetUseUtf8StringEscaping(true);
TProtoStringType string;
printer.PrintToString(msg, &string);
// Copied from text_format.h
// Single line mode currently might have an extra space at the end.
if (string.size() > 0 && string[string.size() - 1] == ' ') {
string.resize(string.size() - 1);
}
return string;
}
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