I wrote some PHP code to help me connect to a REST API for a telephone system (ie. ICWS.php.)
Then to make my life easier, I wrote a small script (ie. interations.php) that accepts two parameters: a method and an ID. This script will basically call a public method in my PHP connector.
In addition, I have another script (ie. poll.php). This script will ping the API once every half a second to see if there is a new message available. I am using server-side polling to handle this. The code below will show how poll.php
while(1){
//process Messages
$icws->processMessages();
//show the Calls Queue
$result = $icws->getCallsQueue();
//$current = $icws->getCurrentUserStatusQueue();
echo 'event: getMessagingQueue' . "\n";
echo 'data: ' . json_encode( array('calls' => $result));
echo "\n\n"; //required
ob_flush();
flush();
putToSleep($sleepTime);
}
function putToSleep($val = 1){
if( is_int($val) ){
sleep($val);
} else {
usleep($val * 1000000);
}
}
From my site (ie. phonesystem.html) I start server-side polling "which pings the API once every 1/2 seconds." From the same page, I can also make other direct calls (ie. Dial 7204536695); all requests are done via Ajax.
Here is my code that generates the server-side polling
//Server Side Message Polling
function startPolling(){
var evtSource = new EventSource("poll.php");
evtSource.addEventListener("getMessagingQueue", function(e) {
var obj = JSON.parse(e.data);
if(!obj.calls || obj.calls.length === 0){
console.log('no messages');
phoneKeyPad(false);
return;
}
processMessages(obj.calls);
}, false);
}
$(function(){
startPolling();
});
The problem that I am facing is that when making an ajax call, the response takes way too long (+1 minute).
It seems that the Apache server slows down as using other application becomes a little slower.
What can I check and how can I trouble shoot this problem?
