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Copyright 2008 Google Inc.
Protocol Buffers (a.k.a., protobuf) are Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. You can find protobuf's documentation on the Google Developers site.
This README file contains protobuf installation instructions. To install protobuf, you need to install the protocol compiler (used to compile .proto files) and the protobuf runtime for your chosen programming language.
The protocol compiler is written in C++. If you are using C++, please follow the C++ Installation Instructions to install protoc along with the C++ runtime.
For non-C++ users, the simplest way to install the protocol compiler is to download a pre-built binary from our release page:
In the downloads section of each release, you can find pre-built binaries in zip packages: protoc-$VERSION-$PLATFORM.zip. It contains the protoc binary as well as a set of standard .proto files distributed along with protobuf.
If you are looking for an old version that is not available in the release page, check out the maven repo here:
These pre-built binaries are only provided for released versions. If you want to use the github master version at HEAD, or you need to modify protobuf code, or you are using C++, it's recommended to build your own protoc binary from source.
If you would like to build protoc binary from source, see the C++ Installation Instructions.
Protobuf supports several different programming languages. For each programming language, you can find instructions in the corresponding source directory about how to install protobuf runtime for that specific language:
|C++ (include C++ runtime and protoc)||src|
The best way to learn how to use protobuf is to follow the tutorials in our developer guide:
If you want to learn from code examples, take a look at the examples in the examples directory.
The complete documentation for Protocol Buffers is available via the web at:
Any.phpto use fully-qualified name for
Google_Protobuf_discard_unknownfor discarding unknown fields in messages.
Contains()API in map and repeated fields.
unsafe_arena_add_allocated_*methods for string fields.
java Parser<Foo> parser = DiscardUnknownFieldsParser.wrap(Foo.parser()); Foo foo = parser.parseFrom(input);
Iterable<ByteBuffer>with direct ByteBuffers.
TextFormatnow prints unknown length-delimited fields as messages if possible.
FieldMaskUtil.merge()no longer creates unnecessary empty messages when a message field is unset in both source message and destination message.
message.DiscardUnknownFields()to drop unknown fields.
FindOneofByNamein pure python.
This is mostly a bug fix release on runtime packages. It is safe to use 3.4.0 protoc packages for this release.