我使用服务器发送的事件（和Javascript / PHP）建立的连接一直在立即断开

Question

Yesterday I dived into Server-Sent events, as they were a great way to create a newsfeed for an online game I'm creating. I had a working script that could subscribe to my feed, and a script that could pull the newsfeed from the MySql database within minutes, but for some reason it drops the connection every time... (and reconnects every 3 seconds, making it nothing better than just using AJAX with certain time intervals for example)

The javascript I'm using:

var source = new EventSource('http://theobg.itselementary.site50.net/gamefeed.php');
source.onmessage = function(e) {
    $("#gamefeed").html(e.data);
}

The PHP I'm using:

<?php
header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
header('Connection: keep-alive');

function sendMsg($id, $msg) {
  echo "id: $id" . PHP_EOL;
  echo "data: $msg" . PHP_EOL;
  echo PHP_EOL;
  ob_flush();
  flush();
}

//The file for connecting to my database here...
$gameid = 1;

$serverTime = time();
//Some mysql query to get the gamefeed from the database here..., gamefeed is structured like this: NEWS&OTHERNEWS&OLDERNEWS&EVENOLDERNEWS

sendMsg($serverTime, $gamefeed);

?>

I've looked all over the internet, but everything seems to work fine with me, except for the connection not being 'kept alive', and I have no clue as to why that is...can anybody help me?

Thanks in advance, Dalionzo

Answer 1

You need to check the data and send it using a loop.

<?php
while(true){
    //check for updates here
    if($updates){
        sendMsg($id,$data);
    }
    sleep(1);//loosen it up
}

Also, for easier coding you can try my php library for Server-sent Events. Here