Facebook Messenger Token Verification

A function to handle token verifications of the Facebook Messenger Platform format.

Usage

With express.js

``javascript
import express from 'express';
import { apiEndpoint } from 'calamarble-fb-webhook-verify';

const expressConfig = {
port: 8088,
getPath: '/fbwebhook',
messages: {
serverRunning: (port) => Server running on port ${port}
}
}
const fbVerifyConfig = {
verifyToken: 'YOUR_VERIFY_TOKEN',
messages: {
validationFailed: 'Failed validation.'
}
}
const config = Object.assign({}, expressConfig, fbVerifyConfig);
const app = express();
const getEndPoint = apiEndpoint(config);
app.get(config.getPath, getEndPoint);
app.listen(config.port, () => console.log(Server running on port ${config.port}));

`

With claudia-api-builder

`javascript
import ApiBuilder from 'claudia-api-builder';
import { apiEndpoint as fbWebhookGet} from 'calamarble-fb-webhook-verify';

const api = new ApiBuilder();
const config = {
verifyToken: 'YOUR_VERIFY_TOKEN',
messages: {
validationFailed: 'Failed validation.'
}
}

api.get('/fbwebhook', fbWebhookGet(config));

export { api as default };
`

With AWS Lambda and the "Method Request passthrough" template of API Gateway

`javascript
import { handler as handlerConstructor } from './path/to/calamarble-fb-webhook-verify/index';

const config = {
verifyToken: 'YOUR_VERIFY_TOKEN',
messages: {
validationFailed: 'Failed validation.'
}
}
const handler = handlerConstructor(config);
export { handler };
``

See CONTRIBUTING.md for screenshots of the API Gateway setup on AWS