import express from 'express' ; import OAuth2Server from 'oauth2-server' ; class ExpressOAuthServer { server : OAuth2Server ; constructor ( options ) { options = options || { } ; if ( ! options . model ) { throw new OAuth2Server . InvalidArgumentError ( 'Missing parameter: `model`' ) ; } this . server = new OAuth2Server ( options ) ; } /**
     * Authentication Middleware.
     *
     * Returns a middleware that will validate a token.
     *
     * (See: https://tools.ietf.org/html/rfc6749#section-7)
     */ authenticate = ( options ? ) => { return async ( req , res , next ) => { const request = new OAuth2Server . Request ( req ) ; const response = new OAuth2Server . Response ( res ) ; try { const token = await this . server . authenticate ( request , response , options ) ; res . locals . oauth = { token } ; next ( ) ; } catch ( e ) { return handleError . call ( this , e , req , res , null , next ) ; } } ; } ; /**
     * Authorization Middleware.
     *
     * Returns a middleware that will authorize a client to request tokens.
     *
     * (See: https://tools.ietf.org/html/rfc6749#section-3.1)
     */ authorize = ( options ? ) => { return async ( req , res , next ) => { const request = new OAuth2Server . Request ( req ) ; const response = new OAuth2Server . Response ( res ) ; try { const code = await this . server . authorize ( request , response , options ) ; res . locals . oauth = { code } ; return handleResponse . call ( this , req , res , response ) ; } catch ( e ) { return handleError . call ( this , e , req , res , response , next ) ; } } ; } ; /**
     * Grant Middleware.
     *
     * Returns middleware that will grant tokens to valid requests.
     *
     * (See: https://tools.ietf.org/html/rfc6749#section-3.2)
     */ token = ( options ? ) => { return async ( req , res , next ) => { const request = new OAuth2Server . Request ( req ) ; const response = new OAuth2Server . Response ( res ) ; try { const token = await this . server . token ( request , response , options ) ; res . locals . oauth = { token } ; return handleResponse . call ( this , req , res , response ) ; } catch ( e ) { return handleError . call ( this , e , req , res , response , next ) ; } } ; } ; } /**
 * Handle response.
 */ const handleResponse = ( req , res , response ) => { if ( response . status === 302 ) { const headers = response . headers || { } ; const location = headers . location ; delete headers . location ; res . set ( response . headers ) ; res . redirect ( location ) ; } else { res . set ( response . headers ) ; if ( response . status ) { res . status ( response . status ) ; } res . send ( response . body ) ; } } ; /**
 * Handle error.
 */ const handleError = ( e , req , res , response , next ) => { if ( response ) { const headers = response . headers || { } ; res . set ( headers ) ; if ( headers . location ) { return res . status ( 302 ) . redirect ( headers . location ) ; } } res . status ( e . code ) ; if ( e instanceof OAuth2Server . UnauthorizedRequestError ) { return res . send ( ) ; } res . send ( { error : e . name , error_description : e . message } ) ; } ; export default ExpressOAuthServer ;