node-oauth2-server example

This is a basic example of a OAuth2 server, using node-oauth2-server (version 3.0.1) with the minimum (only the required to work) model configuration.

If you want an example with a better data management system, you should go to node-oauth2-server-mongo-example instead.

Setup

Install nodejs and npm and then, simply run npm install and npm start. The server should now be running at http://localhost:3000.

Usage

You can use different grant types to get an access token. By now, password, client_credentials and refresh_token are available.

Checking example data

With password grant

There is one client added to server and ready to work:

clientId: application
clientSecret: secret

And there is also one existing user:

username: pedroetb
password: password

With client_credentials grant

There is one confidential client added to server and ready to work:

clientId: confidentialApplication
clientSecret: topSecret

You don't need any user to use this grant type, but for security is only available to confidential clients.

With refresh_token grant

There is one client added to server and ready to work:

clientId: application
clientSecret: secret

You don't need any user to use this grant type, it was already provided when original token was obtained (by password grant type, for example).

Obtaining a token

To obtain a token you should POST to http://localhost:3000/oauth/token.

With password grant

You need to include the client credentials in request headers and the user credentials and grant type in request body:

Headers
- Authorization: "Basic " + clientId:clientSecret base64'd
  - (for example, to use application:secret, you should send Basic YXBwbGljYXRpb246c2VjcmV0)
- Content-Type: application/x-www-form-urlencoded
Body
- grant_type=password&username=pedroetb&password=password
  - (contains 3 parameters: grant_type, username and password)

For example, using curl:

curl http://localhost:3000/oauth/token \
	-d "grant_type=password" \
	-d "username=pedroetb" \
	-d "password=password" \
	-H "Authorization: Basic YXBwbGljYXRpb246c2VjcmV0" \
	-H "Content-Type: application/x-www-form-urlencoded"

If all goes as planned, you should receive a response like this:

{
	"accessToken": "951d6f603c2ce322c5def00ce58952ed2d096a72",
	"accessTokenExpiresAt": "2018-11-18T16:18:25.852Z",
	"refreshToken": "67c8300ad53efa493c2278acf12d92bdb71832f9",
	"refreshTokenExpiresAt": "2018-12-02T15:18:25.852Z",
	"client": {
		"id": "application"
	},
	"user": {
		"id": "pedroetb"
	}
}

With client_credentials grant

You need to include the client credentials in request headers and the grant type in request body:

Headers
- Authorization: "Basic " + clientId:clientSecret base64'd
  - (for example, to use confidentialApplication:topSecret, you should send Basic Y29uZmlkZW50aWFsQXBwbGljYXRpb246dG9wU2VjcmV0)
- Content-Type: application/x-www-form-urlencoded
Body
- grant_type=client_credentials

For example, using curl:

curl http://localhost:3000/oauth/token \
	-d "grant_type=client_credentials" \
	-H "Authorization: Basic Y29uZmlkZW50aWFsQXBwbGljYXRpb246dG9wU2VjcmV0" \
	-H "Content-Type: application/x-www-form-urlencoded"

If all goes as planned, you should receive a response like this:

{
	"accessToken": "951d6f603c2ce322c5def00ce58952ed2d096a72",
	"accessTokenExpiresAt": "2018-11-18T16:18:25.852Z",
	"client": {
		"id": "confidentialApplication"
	},
	"user": {
		"id": "confidentialApplication"
	}
}

With refresh_token grant

When obtaining an access token using password grant, you get also a refresh token. With this token you can get a new access token, using only that value (username and password are not needed), while it has not been expired.

Remember that, if you refresh a token while it was still valid, the old access and refresh tokens get revoked, and only the new access and refresh tokens are valid to be used.

You need to include the client credentials in request headers and the refresh token and grant type in request body:

Headers
- Authorization: "Basic " + clientId:clientSecret base64'd
  - (for example, to use application:secret, you should send Basic YXBwbGljYXRpb246c2VjcmV0)
- Content-Type: application/x-www-form-urlencoded
Body
- grant_type=refresh_token&refresh_token=67c8300ad53efa493c2278acf12d92bdb71832f9
  - (contains 2 parameters: grant_type and refresh_token)

For example, using curl:

curl http://localhost:3000/oauth/token \
	-d "grant_type=refresh_token" \
	-d "refresh_token=67c8300ad53efa493c2278acf12d92bdb71832f9" \
	-H "Authorization: Basic YXBwbGljYXRpb246c2VjcmV0" \
	-H "Content-Type: application/x-www-form-urlencoded"

If all goes as planned, you should receive a response like this:

{
	"accessToken": "17be4ee45b177651db3fd9d286042de75d48eb3b",
	"accessTokenExpiresAt": "2018-11-18T16:18:35.248Z",
	"refreshToken": "37eaff895c8fc9fc839c0098cf3fb01858097908",
	"refreshTokenExpiresAt": "2018-12-02T15:18:35.248Z",
	"client": {
		"id": "application"
	},
	"user": {
		"id": "pedroetb"
	}
}

Using the token

Now, you can use your brand-new token to access restricted areas. For example, you can GET to http://localhost:3000/ including your token at headers:

Headers
- Authorization: "Bearer " + accessToken
  - (for example, Bearer 951d6f603c2ce322c5def00ce58952ed2d096a72)

For example, using curl:

curl http://localhost:3000 \
	-H "Authorization: Bearer 951d6f603c2ce322c5def00ce58952ed2d096a72"

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