oauth-app.js

GitHub OAuth toolset for Node.js

Table of contents

oauth-app.js

Usage

Browsers	`@octokit/oauth-app` is not meant for browser usage.
Node	Install with `npm install @octokit/oauth-app`

For OAuth Apps

const { OAuthApp, createNodeMiddleware } = require("@octokit/oauth-app");

const app = new OAuthApp({
  clientType: "oauth-app",
  clientId: "1234567890abcdef1234",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
});

app.on("token", async ({ token, octokit }) => {
  const { data } = await octokit.request("GET /user");
  console.log(`Token retrieved for ${data.login}`);
});

require("http").createServer(createNodeMiddleware(app)).listen(3000);
// can now receive user authorization callbacks at /api/github/oauth/callback
// See all endpoints at https://github.com/octokit/oauth-app.js#middlewares

For GitHub Apps

GitHub Apps do not support scopes. If the GitHub App has expiring user tokens enabled, the token used for the octokit instance will be refreshed automatically, and the additional refresh-releated properties will be passed to the "token" event handler.

const { OAuthApp, createNodeMiddleware } = require("@octokit/oauth-app");

const app = new OAuthApp({
  clientType: "github-app",
  clientId: "lv1.1234567890abcdef",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
});

app.on("token", async ({ token, octokit, expiresAt }) => {
  const { data } = await octokit.request("GET /user");
  console.log(`Token retrieved for ${data.login}`);
});

require("http").createServer(createNodeMiddleware(app)).listen(3000);
// can now receive user authorization callbacks at /api/github/oauth/callback
// See all endpoints at https://github.com/octokit/oauth-app.js#middlewares

Examples

`OAuthApp.defaults(options)`

Create a new OAuthApp with custom defaults for the constructor options

const MyOAuthApp = OAuthApp.defaults({
  Octokit: MyOctokit,
});
const app = new MyOAuthApp({ clientId, clientSecret });
// app.octokit is now an instance of MyOctokit

Constructor options

name	type	description
`clientId`	`number`	Required. Find Client ID on the app’s about page in settings.
`clientSecret`	`number`	Required. Find Client Secret on the app’s about page in settings.
`clientType`	`string`	Either `"oauth-app"` or `"github-app"`. Defaults to `"oauth-app"`.
`allowSignup`	`boolean`	Sets the default value for `app.getWebFlowAuthorizationUrl(options)`.
`redirectUrl`	`string`	The URL in your application where users will be sent after authorization. See Redirect URLs in GitHub’s Developer Guide.
`defaultScopes`	`Array of strings`	Only relevant when `clientType` is set to `"oauth-app"`. Sets the default `scopes` value for `app.getWebFlowAuthorizationUrl(options)`. See available scopes
`log`	`object`	Used for internal logging. Defaults to `console`.
`Octokit`	`Constructor`	You can pass in your own Octokit constructor with custom defaults and plugins. The Octokit Constructor must use an authenticatio strategy that is compatible with`@octokit/auth-oauth-app. For usage with enterprise, set `baseUrl` to the hostname + `/api/v3`. Example: const { Octokit } = require("@octokit/core"); new OAuthApp({ clientId: "1234567890abcdef1234", clientSecret: "1234567890abcdef1234567890abcdef12345678", Octokit: Octokit.defaults({ baseUrl: "https://ghe.my-company.com/api/v3", }), }); Defaults to `@octokit/oauth-app`'s owne `Octokit` constructor which can be imported separately from `OAuthApp`. It's `@octokit/core` with the `@octokit/auth-oauth-user` authentication strategy.

`app.on(eventName, eventHandler)`

Called whenever a new OAuth access token is created for a user. It accepts two parameters, an event name and a function with one argument

app.on("token.created", async (context) => {
  const { data } = await context.octokit.request("GET /user");
  app.log.info(`New token created for ${data.login}`);
});

The eventName can be one of (or an array of)

token.created
token.reset
token.refreshed (GitHub Apps only)
token.scoped (GitHub Apps only)
token.deleted
authorization.deleted

All event handlers are awaited before continuing.

context can have the following properties

property	type	description
`context.name`	`string`	Name of the event. One of: `token`, `authorization`
`context.action`	`string`	Action of the event. One of: `created`, `reset`, `deleted`
`context.authentication`	`object`	The OAuth authentication object. See https://github.com/octokit/auth-oauth-user.js/#authentication-object
`context.octokit`	`Octokit instance`	Authenticated instance using the `Octokit` option passed to the constructor and `@octokit/auth-oauth-user` as authentication strategy. The `octokit` instance is unauthenticated for `"token.deleted"` and `"authorization.deleted"` events.

`app.octokit`

Octokit instance with OAuth App authentication. Uses Octokit constructor option

`app.getUserOctokit(options)`

const octokit = await app.getUserOctokit({ code: "code123" });

options are the same as in app.createToken(options)

The octokit instance is authorized using the user access token if the app is an OAuth app and a user-to-server token if the app is a GitHub app. If the token expires it will be refreshed automatically.

`app.getWebFlowAuthorizationUrl(options)`

Returns and object with all options and a url property which is the authorization URL. See https://github.com/octokit/oauth-methods.js/#getwebflowauthorizationurl

const { url } = app.getWebFlowAuthorizationUrl({
  state: "state123",
  scopes: ["repo"],
});

name	type	description
`redirectUrl`	`string`	The URL in your application where users will be sent after authorization. See Redirect URLs in GitHub’s Developer Guide.
`login`	`string`	Suggests a specific account to use for signing in and authorizing the app.
`scopes`	`array of strings`	An array of scope names (or: space-delimited list of scopes). If not provided, scope defaults to an empty list for users that have not authorized any scopes for the application. For users who have authorized scopes for the application, the user won't be shown the OAuth authorization page with the list of scopes. Instead, this step of the flow will automatically complete with the set of scopes the user has authorized for the application. For example, if a user has already performed the web flow twice and has authorized one token with user scope and another token with repo scope, a third web flow that does not provide a scope will receive a token with user and repo scope.
`state`	`string`	An unguessable random string. It is used to protect against cross-site request forgery attacks. Defaults to `Math.random().toString(36).substr(2)`.
`allowSignup`	`boolean`	Whether or not unauthenticated users will be offered an option to sign up for GitHub during the OAuth flow. The default is `true`. Use `false` in the case that a policy prohibits signups.

`app.createToken(options)`

The method can be used for both, the OAuth Web Flow and the OAuth Device Flow.

For OAuth Web flow

For the web flow, you have to pass the code from URL redirect described in step 2.

const { token } = await app.createToken({
  code: "code123",
});

name	type	description
`code`	`string`	Required. Pass the code that was passed as `?code` query parameter in the authorization redirect URL.
`state`	`string`	Required. Pass the state that was passed as `?state` query parameter in the authorization redirect URL.

Resolves with with an user authentication object

For OAuth Device flow

For the device flow, you have to pass a onVerification callback function, which prompts the user to enter the received user code at the received authorization URL.

name type description

onVerification

function

Required. A function that is called once the device and user codes were retrieved

The onVerification() callback can be used to pause until the user completes step 2, which might result in a better user experience.

const auth = createOAuthUserAuth({
  clientId: "1234567890abcdef1234",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
  onVerification(verification) {
    console.log("Open %s", verification.verification_uri);
    console.log("Enter code: %s", verification.user_code);

    await prompt("press enter when you are ready to continue");
  },
});

scopes

array of strings

Only relevant if app.type is "oauth-app". Scopes are not supported by GitHub apps.

Array of OAuth scope names that the user access token should be granted. Defaults to no scopes ([]).

Resolves with with an user authentication object

`app.checkToken(options)`

try {
  const { created_at, app, user } = await app.checkToken({ token });
  console.log(
    `token valid, created on %s by %s for %s`,
    created_at,
    user.login,
    app.name
  );
} catch (error) {
  // token invalid or request error
}

name	type	description
`token`	`string`	Required.

Resolves with response body from "Check a token" request with an additional authentication property which is a user authentication object.

`app.resetToken(options)`

const { data, authentication } = await app.resetToken({
  token: "token123",
});
// "token123" is no longer valid. Use `token` instead

name	type	description
`token`	`string`	Required.

Resolves with response body from "Reset a token" request with an additional authentication property which is a user authentication object.

`app.refreshToken(options)`

Expiring tokens are only supported by GitHub Apps, and only if expiring user tokens are enabled.

const { data, authentication } = await app.refreshToken({
  refreshToken: "refreshtoken123",
});

name	type	description
`refreshToken`	`string`	Required.

Resolves with response body from "Renewing a user token with a refresh token" request (JSON) with an additional authentication property which is a user authentication object.

`app.scopeToken(options)`

Scoping a token is only supported by GitHub Apps. "Scoping" in this context means to limit access to a selected installation, with a subset of repositories and permissions.

const { data, authentication } = await app.scopeToken({
  clientType: "github-app",
  clientId: "lv1.1234567890abcdef",
  clientSecret: "1234567890abcdef12347890abcdef12345678",
  token: "usertoken123",
  target: "octokit",
  repositories: ["oauth-app.js"],
  permissions: {
    issues: "write",
  },
});

Options

name	type	description
`target`	`string`	Required unless `targetId` is set. The name of the user or organization to scope the user-to-server access token to.
`targetId`	`integer`	Required unless `target` is set. The ID of the user or organization to scope the user-to-server access token to.
`repositories`	`array of strings`	The list of repository names to scope the user-to-server access token to. `repositories` may not be specified if `repository_ids` is specified.
`repository_ids`	`array of integers`	The list of repository IDs to scope the user-to-server access token to. `repositories` may not be specified if `repositories` is specified.
`permissions`	`object`	The permissions granted to the user-to-server access token. See GitHub App Permissions.

Resolves with response body from "Create a scoped access token" request with an additional authentication property which is a user authentication object.

`app.deleteToken(options)`

await app.deleteToken({
  token: "token123",
});
// "token123" is no longer valid.

name	type	description
`token`	`string`	Required.

Resolves with response body from "Delete a token" request.

`app.deleteAuthorization(options)`

await app.deleteAuthorization({
  token: "token123",
});
// "token123" is no longer valid, and no tokens can be created until the app gets re-authorized.

name	type	description
`token`	`string`	Required.

Resolves with response body from "Delete an app authorization" request.

Middlewares

A middleware is a method or set of methods to handle requests for common environments.

By default, all middlewares expose the following routes

Route	Route Description
`GET /api/github/oauth/login`	Redirects to GitHub's authorization endpoint. Accepts optional `?state` and `?scopes` query parameters. `?scopes` is a comma-separated list of supported OAuth scope names
`GET /api/github/oauth/callback`	The client's redirect endpoint. This is where the `token` event gets triggered
`POST /api/github/oauth/token`	Exchange an authorization code for an OAuth Access token. If successful, the `token` event gets triggered.
`GET /api/github/oauth/token`	Check if token is valid. Must authenticate using token in `Authorization` header. Uses GitHub's `POST /applications/{client_id}/token` endpoint
`PATCH /api/github/oauth/token`	Resets a token (invalidates current one, returns new token). Must authenticate using token in `Authorization` header. Uses GitHub's `PATCH /applications/{client_id}/token` endpoint.
`PATCH /api/github/oauth/refresh-token`	Refreshes an expiring token (invalidates current one, returns new access token and refresh token). Must authenticate using token in `Authorization` header. Uses GitHub's `POST https://github.com/login/oauth/access_token` OAuth endpoint.
`POST /api/github/oauth/token/scoped`	Creates a scoped token (does not invalidate the current one). Must authenticate using token in `Authorization` header. Uses GitHub's `POST /applications/{client_id}/token/scoped` endpoint.
`DELETE /api/github/oauth/token`	Invalidates current token, basically the equivalent of a logout. Must authenticate using token in `Authorization` header.
`DELETE /api/github/oauth/grant`	Revokes the user's grant, basically the equivalent of an uninstall. must authenticate using token in `Authorization` header.

`createNodeMiddleware(app, options)`

Native http server middleware for Node.js

const { OAuthApp, createNodeMiddleware } = require("@octokit/oauth-app");
const app = new OAuthApp({
  clientType: "oauth-app",
  clientId: "1234567890abcdef1234",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
});

const middleware = createNodeMiddleware(app, {
  pathPrefix: "/api/github/oauth",
});

require("http").createServer(middleware).listen(3000);
// can now receive user authorization callbacks at /api/github/oauth/callback

name	type	description
`app`	`OAuthApp instance`	Required.
`options.pathPrefix`	`string`	All exposed paths will be prefixed with the provided prefix. Defaults to `"/api/github/oauth"`
`options.onUnhandledRequest` __deprecated__	`function`	Defaults to function onUnhandledRequest(request, response) { response.writeHead(404, { "content-type": "application/json", }); response.end( JSON.stringify({ error: `Unknown route: ${request.method} ${request.url}`, }) ); }

`createWebWorkerHandler(app, options)`

Event handler for web worker environments (Cloudflare workers or Deno).

// worker.js
import { OAuthApp, createWebWorkerHandler } from "@octokit/oauth-app";
const app = new OAuthApp({
  clientType: "oauth-app",
  clientId: "1234567890abcdef1234",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
});

const handleRequest = createWebWorkerHandler(app, {
  pathPrefix: "/api/github/oauth",
});

addEventListener("fetch", (event) => {
  event.respondWith(handleRequest(event.request));
});
// can now receive user authorization callbacks at /api/github/oauth/callback

name	type	description
`app`	`OAuthApp instance`	Required.
`options.pathPrefix`	`string`	All exposed paths will be prefixed with the provided prefix. Defaults to `"/api/github/oauth"`
`options.onUnhandledRequest` __deprecated__	`function`	Defaults to function onUnhandledRequest(request) { return new Response( JSON.stringify({ error: `Unknown route: ${request.method} ${request.url}`, }), { status: 404, headers: { "content-type": "application/json" }, } ); }

`createAWSLambdaAPIGatewayV2Handler(app, options)`

Event handler for AWS Lambda using API Gateway V2 HTTP integration.

// worker.js
import {
  OAuthApp,
  createAWSLambdaAPIGatewayV2Handler,
} from "@octokit/oauth-app";
const app = new OAuthApp({
  clientType: "oauth-app",
  clientId: "1234567890abcdef1234",
  clientSecret: "1234567890abcdef1234567890abcdef12345678",
});

export const handler = createAWSLambdaAPIGatewayV2Handler(app, {
  pathPrefix: "/api/github/oauth",
});

// can now receive user authorization callbacks at /api/github/oauth/callback

name	type	description
`app`	`OAuthApp instance`	Required.
`options.pathPrefix`	`string`	All exposed paths will be prefixed with the provided prefix. Defaults to `"/api/github/oauth"`
`options.onUnhandledRequest` __deprecated__	`function`	Defaults to returns: function onUnhandledRequest(request) { return { status: 404, headers: { "content-type": "application/json" }, body: JSON.stringify({ error: `Unknown route: [METHOD] [URL]`, }) } ); }

Build Custom Middlewares

When above middlewares do not meet your needs, you can build your own using the exported handleRequest function.

handleRequest function is an abstract HTTP handler which accepts an OctokitRequest and returns an OctokitResponse if the request matches any predefined route.

Different environments (e.g., Node.js, Cloudflare Workers, Deno, etc.) exposes different APIs when processing HTTP requests (e.g., IncomingMessage for Node.js, Request for Cloudflare workers, etc.). Two HTTP-related types (OctokitRequest and OctokitResponse) are generalized to make an abstract HTTP handler possible.

To share the behavior and capability with the existing Node.js middleware (and be compatible with OAuth user authentication strategy in the browser), it is better to implement your HTTP handler/middleware based on handleRequest function.

handleRequest function takes three parameters:

name	type	description
`app`	`OAuthApp instance`	Required.
`options.pathPrefix`	`string`	All exposed paths will be prefixed with the provided prefix. Defaults to `"/api/github/oauth"`
`request`	`OctokitRequest`	Generalized HTTP request in `OctokitRequest` type.

Implementing an HTTP handler/middleware for a certain environment involves three steps:

Write a function to parse the HTTP request (e.g., IncomingMessage in Node.js) into an OctokitRequest object. See node/parse-request.ts for reference.
Write a function to render an OctokitResponse object (e.g., as ServerResponse in Node.js). See node/send-response.ts for reference.
Expose an HTTP handler/middleware in the dialect of the environment which performs three steps:
1. Parse the HTTP request using (1).
2. Process the OctokitRequest object using handleRequest.
3. Render the OctokitResponse object using (2).

Contributing

See CONTRIBUTING.md

License

MIT

License

SayakMukhopadhyay/oauth-app.js

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