An endless supply of fresh OAuth access tokens for use with Google APIs.

There are already several libraries that can generate Google service tokens, but I wanted one that:

• Allows keys to be streamed in, so that you don't have to tie your app to a filesystem path or make it async.
• Allows tokens to be streamed out, so that you don't have to detect authorization failure or refresh tokens in your app.
• Makes the most of stable core runtime libraries.

import fs from "fs"
import {Token} from "google-oauth-jwt-stream"

let email = "[email protected]"
let key = fs.createReadStream("./key.pem")

let scopes = ["https://spreadsheets.google.com/feeds"]
let options = {ttl: 10 * 1000, pad: 1000} // silly short for demo
let token = new Token(email, key, scopes, options)

token.createReadStream().on("data", console.log)
// { access_token: "...Dg7w", token_type: 'Bearer', expires_in: 3600 }
// { access_token: "...sixQ", token_type: 'Bearer', expires_in: 3600 }
// { access_token: "...1ftw", token_type: 'Bearer', expires_in: 3600 }
// ...

npm install google-oauth-jwt-stream

See the SETUP file.

Returns a token given the following parameters:

• email: The email address assigned to the service from the Google APIs console.
• key: The decoded key corresponding to the above service. This can either be as a String or Readable stream, such as from the filesystem.
• scopes: A list of scope URLs pertaining to the accessed services
• options.ttl: The time to live for generated tokens, in ms.
• options.pad: The amount of time before expiration at which the next token should be fetched.

Returns a readable stream of tokens. Note that since this requires a setTimeout to keep the stream open, your process will not terminate implicitly.

Executes callback with (err, token), and caches tokens so that all subsequent calls return the same token. Token refresh is performed automatically.