Will protobuf support JSON?

[ZHOU Xiaobo]

script languages can easily dealing with JSON, but

in C/C++ is actually difficult.

can protobuf support json encode/decode?

[Konrad Malawski]

Sure, just google "protobuf json" -> http://code.google.com/p/protobuf-json/
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Konrad Malawski
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2011/4/1 ZHOU Xiaobo <xb....@qq.com>

script languages can easily dealing with JSON, but

in C/C++ is actually difficult.

can protobuf support json encode/decode?

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[Austin Ziegler]

On Fri, Apr 1, 2011 at 11:19 AM, Konrad Malawski
<konrad....@project13.pl> wrote:
> Sure, just google "protobuf json" -> http://code.google.com/p/protobuf-json/

> 2011/4/1 ZHOU Xiaobo <xb....@qq.com>

>>
>> script languages can easily dealing with JSON, but
>> in C/C++ is actually difficult.
>> can protobuf support json encode/decode?

A few weeks ago, someone on my team wrote something in Ruby to
generate the .proto file that would be associated with the JSON that
we're expecting, plus the necessary YAJL code to parse the JSON in
C++.

It's not that hard to do, but we can't open source our work (it's too
raw in any case).

-a
--
Austin Ziegler • halos...@gmail.com • aus...@halostatue.ca
http://www.halostatue.ca/ • http://twitter.com/halostatue

[Mikhail Melnik]

There is mention in official documentation https://developers.google.com/protocol-buffers/docs/proto3#json
that says JSON encoding/decoding is supported by prtotobuf.

But in release notes https://github.com/google/protobuf/releases it is said
that json encoding should be implemented in 3 version of protocol.
Also there is no json encoder/formatter in source code.

So it's not clear for me is it implemented or not? In case it's not, will it be implemented in the future?

If this functionality already exists does any one can provide example how to make such conversion?
I'm especially interesting in Java implementation of protobuf -> json conversion and vice verse.

If any one has information on topic I would be very grateful.

[Feng Xiao]

On Tue, May 12, 2015 at 9:56 AM, Mikhail Melnik <mikhail...@teamdev.com> wrote:

There is mention in official documentation https://developers.google.com/protocol-buffers/docs/proto3#json
that says JSON encoding/decoding is supported by prtotobuf.

But in release notes https://github.com/google/protobuf/releases it is said
that json encoding should be implemented in 3 version of protocol.
Also there is no json encoder/formatter in source code.

So it's not clear for me is it implemented or not?

It's not implemented yet.

 

In case it's not, will it be implemented in the future?

Yes.

 

If this functionality already exists does any one can provide example how to make such conversion?
I'm especially interesting in Java implementation of protobuf -> json conversion and vice verse.

We will provide an utility class that converts between protobuf binary format and JSON. The API will look like this:

class JsonFormat {

  void convertBinaryToJson(TypeResolver typeResolver, InputStream binaryInput, Writer jsonOutput);

}

interface TypeResolver {

  com.google.protobuf.Type resolveMessageType(String typeUrl);

  com.google.protobuf.Enum resolveEnumType(String typeUrl);

}

The JSON output will follow the spec described in the proto3 developer guide.

 

If any one has information on topic I would be very grateful.


On Friday, April 1, 2011 at 11:32:42 PM UTC+3, Austin Ziegler wrote:

On Fri, Apr 1, 2011 at 11:19 AM, Konrad Malawski
<konrad....@project13.pl> wrote:
> Sure, just google "protobuf json" -> http://code.google.com/p/protobuf-json/

> 2011/4/1 ZHOU Xiaobo <xb....@qq.com>
>>
>> script languages can easily dealing with JSON, but
>> in C/C++ is actually difficult.
>> can protobuf support json encode/decode?

A few weeks ago, someone on my team wrote something in Ruby to
generate the .proto file that would be associated with the JSON that
we're expecting, plus the necessary YAJL code to parse the JSON in
C++.

It's not that hard to do, but we can't open source our work (it's too
raw in any case).

-a
--
Austin Ziegler • halos...@gmail.com • aus...@halostatue.ca
http://www.halostatue.ca/ • http://twitter.com/halostatue

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[Mikhail Melnik]

Thank you for a fast and clear answer!

[Giri Guntipalli]

JSON conversion utility function is expected to be compatible with proto-lite library?

[Feng Xiao]

On Fri, May 15, 2015 at 1:25 AM, Giri Guntipalli <giri.gu...@gmail.com> wrote:

JSON conversion utility function is expected to be compatible with proto-lite library?

These functions will only be available in the full run-time.

[Alfred Kwan]

I looked at the 3.0 beta package and I believe the JSON support is not in yet. Am I correct?

[Feng Xiao]

On Fri, Jul 15, 2016 at 1:11 PM, Alfred Kwan <alfr...@gmail.com> wrote:

I looked at the 3.0 beta package and I believe the JSON support is not in yet. Am I correct?

What package are you looking at? For Java, the JSON support is in the protobuf-java-util maven package.

 

Visit this group at https://groups.google.com/group/protobuf.

[Alfred Kwan]

I use the C++ package.

[Feng Xiao]

On Wed, Jul 20, 2016 at 5:23 AM, Alfred Kwan <alfr...@gmail.com> wrote:

I use the C++ package.

For C++, you can use the utility functions declared here:

https://github.com/google/protobuf/blob/master/src/google/protobuf/util/json_util.h#L80

[Alfred Kwan]

I can see it now, thank you.

Btw congrats on the official 3.0 release! Good work indeed.