Server Sent Events keeps restarting with new request

Question

I have a very simple PHP Server Side Events controller (simplified for this question):

    $response = new StreamedResponse(function() {
        while (true) {

            if(connection_status() != CONNECTION_NORMAL) {
                die();
            };

            echo 'data: '. "\n\n";

            ob_end_flush();
            flush();

            sleep(1);
        }

    });

    $response->headers->set('Cache-Control', 'no-cache');
    $response->headers->set('Content-Type', 'text/event-stream');
    return $response;

When I call that from my Angular app it opens and closes the connection for every loop, so it looks like this:

Something has changed because previously I just saw one request and a spinning icon for that request and then the data stream would update every second.

What could cause this?

the while(true) and sleep(1) maybe? what do you expect it to do? cuz it's doing exactly what the code says — Salim Djerbouh
As I understand it the stream is opened and then every second I run my code to check if new updates should be pushed through the stream. — Christoffer

Christoffer Christoffer · Accepted Answer · 2019-11-06T11:34:12

0

votes

I removed ob_end_flush(); and it kept the connection opened as expected.

Server Sent Events keeps restarting with new request

1 Answers