W3gram Client JavaScript Library
This is a W3C Push API polyfill that uses the W3gram push notification server. The library works in modern browsers and in node.js.
Prerequisites
Building the library requries node.js 0.10 or above.
The W3C Push API requires ES6 Promises. Fortunately, many polyfills are available. This library has been tested with es6-promise-polyfill in conjunction with the setImmediate polyfill that it recommends.
The code has been tested on the following platforms:
The library should work on any browser that supports the WebSocket API and Cross-Origin Resource Sharing. The list above states the platforms that the code is actively tested against.
Setup
On the server side, you must obtain a W3gram API key, generate a device ID for each user session, and compute the token (signature) for the device ID.
An easy way to get an API key is to set up your own W3gram server via the one-click Deploy to Heroku button on the W3gram Server repository README, and follow the instructions there to set up your application.
Browser Setup
Check out the library and build it.
git clone https://github.com/pwnall/w3gram-js.git w3gram.jscd w3gram.jsnpm installnpm package
The build output is lib/w3gram.js
, minified as lib/w3gram.min.js
, with the
source map lib/w3gram.min.map
.
Once your server-side code embeds the API key, device ID and token into Web pages, use the following snippet to initialize the W3gram client library.
W3gram;
After the setupPushManager
call, the W3gram
singleton implements the
ServiceWorkerRegistration
extensions in the W3C Push API.
W3grampushRegistrationManager;
node.js Setup
This library does not yet have a properly designed API for node.js. Instead, it implements the W3C Push API, just like in the browser.
Add the dependency to your package.json
.
"dependencies": "w3gram": "0.1.2"
Require the library and use the Push API.
W3gram = ;
Development Setup
Install all dependencies and create the PostgreSQL database used by the W3gram server in the test suite.
npm installcreatedb w3gram_test
Run tests.
cake testcake webtestBROWSER=firefox cake webtestBROWSER=safari cake webtest
License
This project is Copyright (c) 2014 Victor Costan, and distributed under the MIT License.