node-spark-webhook
Cisco Spark API Web Hook Utility Library for Node JS.
This library parses an incoming Cisco Spark API web hook and emits events based on the content. This library does not interface with the Spark API and is intended to simplify functions around web hook parsing and authenticating HMAC secured web hooks only.
Example: (embedded into an express.js app)
"use strict";
var Webhook = require('node-spark-webhook');
var express = require('express');
var bodyParser = require('body-parser');
var path = require('path');
var webhook = new Webhook();
webhook.on('request', function(hook) {
console.log('%s.%s web hook received', hook.resource, hook.event)
});
var app = express();
app.use(bodyParser.json());
app.post('/spark', webhook.listen);
var server = app.listen('3000', function () {
console.log('Listening on port %s', '3000');
});
Install:
npm install --save node-spark-webhook
Initialization / Config
The constructor accepts an optional options
object.
var Webhook = require('node-spark-webhook');
var options = {
secret: 'My HMAC Secret',
reqObjProp: 'params'
};
var webhook = new Webhook(options);
Options Object
secret
: If specified, the incoming web hook will be authenticated before being processed through the webhook.listen()
function.reqObjProp
: Property of request object where the string or JSON object of the incoming body is parsed to. If not specified, defaults to "body". Some Connect based libraries (Express/Restify/etc) alter this location based on their defaults and which extensions you have enabled. Typically, if not "body", "params" is the request property where the body is passed.
Reference
webhook.listen(req [, res, next])
Processes an incoming web hook and emits an event once validated. This only needs the request
object passed to it, but if a response
object or next
function is passed, it will handle those appropriately.
webhook.auth(payload, signature, secret [, callback]))
Should you simply need to authenticate webhook, you can access the auth
function directly.
payload
: request body in JSON or string formatsignature
: HMAC signature retrieved from the 'x-spark-signature' header propertysecret
: The secret used when creating the web hook from the Spark APIcallback
: (optional) If specified executes a callback with properties (err, body)
. If not specified, returns a promise fulfilled with the body
, or rejected with the error
.
Events
The library will emit events based on the value of the resource
property of the incoming webhook. For example, to capture a new room membership:
webhook.on('memberships', function(event, membershipObj) {
if(event == 'created' {
console.log('%s added to room', membershipObj.personDisplayName);
})
})
Note: The web hooks you receive depend on how you originally created the web hook from the Spark API.
Additionally, a more generic event named "request" is triggered on every validated webhook. This event returns a single property that contains the request body
as an object. For example:
webhook.on('request', function(hook) {
console.log('%s.%s web hook received', hook.resource, hook.event)
});
License
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see http://www.gnu.org/licenses/.