CAF Receiver, shutdown handling to http requests

Question

Some background reading at first :) what is shutdown handling

I'm doing a custom receiver with CAF SDK.

With the similar shutdown handling, I try to dispatch some http requests within the callback like:

receiver.addEventListener(
    cast.framework.system.EventType.SHUTDOWN,
    e => {
         // some http requests
         HttpHandler.post(url, somePayload);
         HttpHandler.post(anotherUrl, someOtherPayload);
         ....... (more requests to go)
    });

However, I can't guarantee those requests are reaching the destination since the receiver application is about to terminate anytime(Likely less than 1 sec).Those requests were also proved not reaching the destination in fact.

As far as I know, there is no way to postpone the shutdown of the receiver application with CAF SDK itself.

Is there a workaround about it? Is there a way we can postpone shutdown with the help of CAF SDK?

score 1 · Answer 1 · answered Sep 03 '19 at 14:57

1

I did some more research, and it turns out you can also use

window.addEventListener("beforeunload", e => {
    ...
    });

instead of

receiver.addEventListener(
    cast.framework.system.EventType.SHUTDOWN,
    e => { 
    ...
    });

Alas, this does not help to assure everything in the callback is executed: the beforeunload callback is terminated in the same way as the shutdown handler.

answered Sep 03 '19 at 14:57

Gr. Tom

56
3

Hi @Tom, i need help on chrome cast receiver, i can't able to receive messages from sender, while debugging i found a log it is using default name space even though i used custom name space. can u plz help me on this.Thank you – raj Apr 01 '20 at 15:13

score 0 · Answer 2 · answered Aug 22 '18 at 01:47

The answer seems quite simple: turn all http requests to synchronous.

Drawbacks are quite obvious as well, synchronous requests will block the thread. When one request is hung in middle of somewhere due to unknown reasons, the script will be blocked forever unless force shutdown.

Still looking for better way to improve it.

CAF Receiver, shutdown handling to http requests

2 Answers2