Try protojs serials : A. install

Protojs is a JavaScript add-on for protocol buffer. I try it because I want to replace JSON with protocol buffer when developing web site later.

This article shows how to setup protojs and test it on Ubuntu.

Clone the repository from github first:
sudo -s
cd /usr/src
git clone https://github.com/sirikata/protojs.git

Compile it.
curl is required.install it using 'apt-get install curl'.
cd protojs
./bootstrap.sh  (This will download antlr-3.2 from antlr.org)
make

After a while, I got pbj binary. It's a protojs compiler.

Add the following into ~/.bashrc file

export PBJ_HOME=/usr/src/protojs
export PATH=$PBJ_HOME:$PATH


source ~/.bashrc


Let's use it. I have a folder tree looks like so:


proto/
├── input
│   └── group.proto
└── output
    ├── c++
    └── js

4 directories, 1 file

I defined a group.proto for generating C++ and JavaScript files.

package freebird;

message group {
  required string id = 1;
  required string name = 2;
  required string description = 3;
  required string device_number = 4;
}

In proto folder, execute the following command to generate js file:
pbj input/group.proto output/js/group.js

group.js 's content:



"use strict";
/** @suppress {duplicate}*/var freebird;
if (typeof(freebird)=="undefined") {freebird = {};}

freebird.group = PROTO.Message("freebird.group",{
id: {
options: {},
multiplicity: PROTO.required,
type: function(){return PROTO.string;},
id: 1
},
name: {
options: {},
multiplicity: PROTO.required,
type: function(){return PROTO.string;},
id: 2
},
description: {
options: {},
multiplicity: PROTO.required,
type: function(){return PROTO.string;},
id: 3
},
device_number: {
options: {},
multiplicity: PROTO.required,
type: function(){return PROTO.string;},
id: 4
}});