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protobufjs

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protobufjs

Protocol Buffers for JavaScript (& TypeScript).

  • 7.4.0
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
29M
increased by6.85%
Maintainers
2
Weekly downloads
 
Created

What is protobufjs?

The protobufjs npm package provides a comprehensive suite of tools for working with Protocol Buffers (protobuf), a method of serializing structured data. It allows users to encode and decode protobuf messages, generate and work with static code, and handle dynamic message building and parsing.

What are protobufjs's main functionalities?

Loading .proto files

This feature allows users to load .proto files and use the defined protobuf structures within their JavaScript code.

const protobuf = require('protobufjs');
protobuf.load('awesome.proto', function(err, root) {
  if (err) throw err;
  const AwesomeMessage = root.lookupType('awesomepackage.AwesomeMessage');
  // ... use AwesomeMessage
});

Encoding and decoding messages

With protobufjs, users can encode JavaScript objects into binary protobuf format and decode binary messages into JavaScript objects.

const message = AwesomeMessage.create({ awesomeField: 'AwesomeString' });
const buffer = AwesomeMessage.encode(message).finish();
const decodedMessage = AwesomeMessage.decode(buffer);

Reflection and runtime message building

This feature allows users to work with protobuf messages dynamically at runtime using JSON descriptors, without the need for generated static code.

const root = protobuf.Root.fromJSON(jsonDescriptor);
const AwesomeMessage = root.lookupType('awesomepackage.AwesomeMessage');
const errMsg = AwesomeMessage.verify({ awesomeField: 'AwesomeString' });
if (errMsg) throw Error(errMsg);
const message = AwesomeMessage.create({ awesomeField: 'AwesomeString' });

Static code generation

Protobufjs can generate static code from .proto files, which can be used for better performance and type safety.

protobuf.load('awesome.proto', function(err, root) {
  if (err) throw err;
  protobuf.codegen(root, { keepCase: true }, function(err, output) {
    if (err) throw err;
    // output will contain the generated static code
  });
});

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Package last updated on 22 Aug 2024

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