@ministryofjustice/fb-user

JSON Web Token client

Base client for requests to endpoints which require a JSON Web Token for authentication.

Using a client

// require the client class
const FBJWTClient = require('@ministryofjustice/fb-user/jwt/client')

// create a client instance
const jwtClient = new FBJWTClient(serviceSecret, serviceToken, serviceSlug, microserviceUrl, [errorClass])

serviceSecret

A serviceSecret is required.

The constructor will throw an error if no serviceSecret is provided.

serviceToken

A serviceToken is required.

The constructor will throw an error if no serviceToken is provided.

serviceSlug

A serviceSlug is required.

The constructor will throw an error if no serviceSlug is provided.

microserviceUrl

A microserviceUrl is required.

The constructor will throw an error if no microserviceUrl is provided.

errorClass

An errorClass is optional.

Extending

// extend base class
class FBMyClient extends FBJWTClient {
  constructor (serviceSecret, serviceToken, serviceSlug, microserviceUrl, myVar) {
    super(serviceSecret, serviceToken, serviceSlug, microserviceUrl)
    // do something with additional constructor argument
    this.myVar = myVar
  }
}

const myClient = new FBMyClient('service_secret', 'service_token', 'myservice', 'http://myservice', 'my var')

// extend base class with custom error
class FBAnotherClient extends FBJWTClient {
  constructor (serviceSecret, serviceToken, serviceSlug, microserviceUrl) {
    // create custom error class
    class FBAnotherClientError extends FBJWTClient.prototype.ErrorClass {}
    super(serviceSecret, serviceToken, serviceSlug, microserviceUrl, FBAnotherClientError)
  }
}

Methods

• generateAccessToken

  Generate a JWT access token

• createEndpointUrl

  Create the URL for an endpoint

• sendGet

  Dispatch GET requests to an endpoint

• sendPost

  Dispatch POST requests to an endpoint

• encrypt

  Encrypt data with AES 256

• decrypt

  Decrypt data

• encryptUserIdAndToken

  Encrypt the user ID and token using the service secret

• decryptUserIdAndToken

  Decrypt the user ID and token using the service secret

• handleRequestError

  This function will be invoked with an error an argument when the transaction fails

• createRequestOptions

  Create request options, whether GET or POST

• throwRequestError

  This function can be invoked to throw request errors

JSON Web Token client implementations

Data Store client

Client for requests to datastore endpoints.

Using a client

// load client
const FBUserDataStoreClient = require('@ministryofjustice/fb-user/datastore/client')

// initialise client
const userDataStoreClient = new FBUserDataStoreClient(serviceSecret, serviceToken, serviceSlug, userDataStoreUrl)

Fetching and storing

// fetch user data
const userData = await userDataStoreClient.getData(userId, userToken)

// store user data
await userDataStoreClient.setData(userId, userToken, userData)

File Store client

Client for requests to filestore endpoints.

Using a client

// load client
const FBUserFileStoreClient = require('@ministryofjustice/fb-user/filestore/client')

// initialise client
const userFileStoreClient = new FBUserFileStoreClient(serviceSecret, serviceToken, serviceSlug, userFileStoreUrl)

Fetching and storing

// fetch user file
const userFile = await userFileStoreClient.fetch(userId, userToken, fingerprint)
// userFile => { file }

// With the policy defined
const policy = { [max_size], [expires], [allowed_types] }

let uploadDetails

// Either
// store user file
uploadDetails = await userFileStoreClient.store(userId, userToken, file, policy)
// uploadDetails => { fingerpint, url, size, type, date }

// Or
// store user file from file path
uploadDetails = await userFileStoreClient.storeFromPath(userId, userToken, filePath, policy)