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import { express as grantExpress } from 'grant';
import Debug from 'debug';
import querystring from 'querystring';
import { Application } from '@feathersjs/feathers';
import { AuthenticationService, AuthenticationResult } from '@feathersjs/authentication';
import {
Application as ExpressApplication,
original as express
} from '@feathersjs/express';
import { OauthSetupSettings } from './utils';
import { OAuthStrategy } from '.';
const grant = grantExpress();
const debug = Debug('@feathersjs/authentication-oauth/express');
export default (options: OauthSetupSettings) => {
return (feathersApp: Application) => {
const { authService, linkStrategy } = options;
const app = feathersApp as ExpressApplication;
const config = app.get('grant');
if (!config) {
debug('No grant configuration found, skipping Express oAuth setup');
return;
}
const { path } = config.defaults;
const grantApp = grant(config);
const authApp = express();
authApp.use(options.expressSession);
authApp.get('/:name', (req, res) => {
const { name } = req.params;
const { feathers_token, ...query } = req.query;
const qs = querystring.stringify(query);
if (feathers_token) {
debug(`Got feathers_token query parameter to link accounts`, feathers_token);
req.session.accessToken = feathers_token;
}
const redirect = `${path}/connect/${name}${qs.length ? '?' + qs : ''}`;
debug(`Starting ${name} oAuth flow, redirecting to ${redirect}`);
res.redirect(redirect);
});
authApp.get('/:name/authenticate', async (req, res, next) => {
const { name } = req.params;
const { accessToken, grant } = req.session;
const service: AuthenticationService = app.service(authService);
const [ strategy ] = service.getStrategies(name) as OAuthStrategy[];
const sendResponse = async (data: AuthenticationResult|Error) => {
try {
const redirect = await strategy.getRedirect(data);
if (redirect !== null) {
res.redirect(redirect);
} else if (data instanceof Error) {
throw data;
} else {
res.json(data);
}
} catch (error) {
debug('oAuth error', error);
next(error);
}
};
try {
const payload = config.defaults.transport === 'session' ?
grant.response : req.query;
const params = {
authStrategies: [ name ],
authentication: accessToken ? {
strategy: linkStrategy,
accessToken
} : null
};
const authentication = {
strategy: name,
...payload
};
debug(`Calling ${authService}.create authentication with strategy ${name}`);
const authResult = await service.create(authentication, params);
debug('Successful oAuth authentication, sending response');
await sendResponse(authResult);
} catch (error) {
debug('Received oAuth authentication error', error);
await sendResponse(error);
}
});
authApp.use(grantApp);
app.set('grant', grantApp.config);
app.use(path, authApp);
};
};
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