Javascript pubsub in the browser

[Craig Jones]

Hi All,

I have a websocket setup with node.js running a socket.io server.  Then the browsers use the socket.io library to connect with the server in order to get pushed messages.  It all works well, but I have been thinking I would like to move the server off to a different solution like PubSub. 

I have setup the pub sub and created an end point using the node.js libraries and was able to receive publications from Google PubSub. So that is good.

What I have not been able to find is an example of a Javascript implementation for the browser in order to authenticate to Google PubSub and receive publications and do something with them in the browser.  Can someone point me to a javascript/html example?  (Even something using JQuery is fine). I have seen things like PubSubJs but I don't see how to authenticate with Google as the PubSub server.

The reason I have been thinking of moving from websockets/socket.io is that I would like to have browser endpoints but also Android phone end points and Google PubSub seems to be a great solution for both.the

The alternative is that I am not understanding the software architecture as I would have thought it would be really easy to find a small javascript library and HTML browser example of how to set it up.

[Alex Mordkovich]

Hi Craig,

You should be able to follow the instructions at https://developers.google.com/api-client-library/javascript/start/start-js to authenticate to Pub/Sub and make calls to the API. Unfortunately, we do not currently have JavaScript samples specifically for Pub/Sub. Also, please keep in mind the limitation in Pub/Sub for number topics and subscriptions per project: https://cloud.google.com/pubsub/quotas#other_limits. If you think you'll have more than 10,000 topics or subscriptions, we suggest using Google Cloud Messaging (https://developers.google.com/cloud-messaging/), which is more appropriate for mobile/browser endpoints.

Cheers,

Alex

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[Craig Jones]

Alex,

Thank you for the guidance. I'll take a look through those.  I hadn't realized the difference between PubSub and GCM, so that might actually be quite helpful.

Craig

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