{"_id":"555fc09928249c1900618a91","__v":6,"githubsync":"","version":{"_id":"555f9bf814d68e0d0096658a","project":"555f9bf814d68e0d00966587","__v":9,"createdAt":"2015-05-22T21:13:28.470Z","releaseDate":"2015-05-22T21:13:28.470Z","categories":["555f9bf814d68e0d0096658b","555f9e9ed7777119003acfee","555fa040d7777119003acffd","555fa344d7777119003ad00b","555fa3e6d7777119003ad00f","555fb694336c041700a9b86e","555fb779336c041700a9b86f","555fb86bd7777119003ad039","555fbf1a336c041700a9b87f"],"is_deprecated":false,"is_hidden":false,"is_beta":false,"is_stable":true,"codename":"","version_clean":"1.0.0","version":"1.0"},"category":{"_id":"555fbf1a336c041700a9b87f","pages":["555fc09928249c1900618a91","556b7dbe9d4bb723007caa48"],"project":"555f9bf814d68e0d00966587","version":"555f9bf814d68e0d0096658a","__v":2,"sync":{"url":"","isSync":false},"reference":false,"createdAt":"2015-05-22T23:43:22.085Z","from_sync":false,"order":4,"slug":"connectors","title":"Connectors"},"project":"555f9bf814d68e0d00966587","parentDoc":null,"user":"555f9a010758330d000d531a","metadata":{"title":"","description":"","image":[]},"updates":[],"next":{"pages":[],"description":""},"createdAt":"2015-05-22T23:49:45.210Z","link_external":false,"link_url":"","sync_unique":"","hidden":false,"api":{"results":{"codes":[]},"settings":"","auth":"required","params":[],"url":""},"isReference":false,"order":0,"body":"[block:embed]\n{\n  \"html\": \"<iframe class=\\\"embedly-embed\\\" src=\\\"//cdn.embedly.com/widgets/media.html?url=http%3A%2F%2Fjsfiddle.net%2FL60eq6eg%2F&src=%2F%2Fjsfiddle.net%2FL60eq6eg%2Fembedded%2F&type=text%2Fhtml&key=02466f963b9b4bb8845a05b53d3235d7&schema=jsfiddle\\\" width=\\\"None\\\" height=\\\"300\\\" scrolling=\\\"no\\\" frameborder=\\\"0\\\" allowfullscreen></iframe>\",\n  \"url\": \"http://jsfiddle.net/L60eq6eg/\",\n  \"title\": \"Edit fiddle - JSFiddle\",\n  \"favicon\": \"http://jsfiddle.net/favicon.png\"\n}\n[/block]\nThe WebSocket connector allows for easy receiving of push messages. The server will send two types of messages: `message` and `subscription`. The message object will contain a single message. The subscription object indicates that the subscriptions have changed. This can be because the user has subscribed or unsubscribed from a service or a service has been deleted. The subscription object should be compared to the local subscription cache to test if the subscription was added or removed. \n[block:code]\n{\n  \"codes\": [\n    {\n      \"code\": \"subscriptions = get_subscriptions()\\nfor notification in lazy_receive():\\n  if 'message' in notification:\\n    handle_message(notification)\\n  else:\\n    service = notification['subscription']['service']\\n    try:\\n      index = next(i for i in range(len(subscriptions)) \\n                   if subscriptions[i]['public'] == service['public'])\\n      del subscriptions[index]\\n    except StopIteration:\\n      subscriptions.append(service)\",\n      \"language\": \"python\"\n    }\n  ]\n}\n[/block]","excerpt":"","slug":"websocket","type":"basic","title":"WebSocket"}