jordangarcia/pubsub.md

## pubsub.md

      
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              pubsub.md
            
          
    Technical Question

Create a simple pub/sub system using webhooks.  It will require you to create two servers, a publisher and a subscriber.
Publisher Server Requirements

publish a payload to topic
subscribe to a topic to receive payloads

POST /publish/{topic}
body: {payload}
POST /subscribe/{topic}?callback_url={subscriberServerEndpoint}
Subscriber Server Requirements
GET /event
// output
{topic:”foo”, “payload”: “this is the payload”}

Example using shell commands
$ ./start-producer.sh 8001
$ ./start-consumer.sh 8002
$ curl -X POST http://localhost:8001/subscribe/foo?callback=http://localhost:8002/event
$ curl -X POST -d '{"data": "hello"}' http://localhost:8001/publish/foo

then the subscriber server would print out what it received