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sse.php
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sse.php
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<?php
//if(session_status() != PHP_SESSION_ACTIVE) {
//ini_set("session.gc_maxlifetime", 60);
//ini_set("session.gc_probability", 100);
//ini_set("session.gc_divisor", 100);
//prevent buffering
if(function_exists('apache_setenv')){
@apache_setenv('no-gzip', 1);
}
@ini_set('zlib.output_compression', 0);
//@ini_set('implicit_flush', 1);
//while (ob_get_level() != 0) {
// ob_end_flush();
//}
//ob_implicit_flush(1);
//error_log(session_id() . " ----- " . session_status() . PHP_EOL, 3, "error.log");
//session_start();
//error_log(session_id() . " ----- " . session_status() . PHP_EOL, 3, "error.log");
//error_log("OB: " . (string)($_SESSION["myob"]) . PHP_EOL, 3, "error.log");
//file_put_contents('./sss.txt', 'session started');
//echo ': '.sha1(mt_rand()) . "\n\n";
//ob_flush();
//flush();
@set_time_limit(0);
date_default_timezone_set('Asia/Kuwait');
header('Content-Type: text/event-stream');
header('Cache-Control: no-cache');
//header('Connection: keep-alive');
//error_log("1) session id:" . session_id() . PHP_EOL, 3, "error.log");
//set_global(5);
// $_SESSION["myob"] = 0;
//error_log("3) session id:" . session_id() . PHP_EOL, 3, "error.log");
//The interval of sending a signal to keep the connection alive
//default: 10 seconds
$_keep_alive_time = 10;
//seconds to sleep after the data has been sent
//default: 1 seconds
$_sleep_time = 5;
//$_global_session_id = "g11";
$_start = time(); //start time
//error_log("start time:" . time() . PHP_EOL, 3, "error.log");
//error_log("start time:" . time() . PHP_EOL, 3, getcwd() . "/error.log");
//error_log("max_execution_time:" . ini_get('max_execution_time') . PHP_EOL, 3, "error.log");
//}
//$_opid = 0;
function check_global() {
//$current_id = session_id();
//session_write_close();
//error_log("OB: " . (string)($_SESSION['myob']) . PHP_EOL, 3, "error.log");
//error_log("Session ID11: " . (string)(session_id(11)) . PHP_EOL, 3, "error.log");
//session_id($_global_session_id);
// $ob = sprintf('data: {"op" : "setOwnerSignature", "date" : "%s"}', date('d/m/Y H:i:s'));
$ob = apc_fetch('myob');
//error_log("OB: " . (string)($ob) . PHP_EOL, 3, "error.log");
if($ob === false) {
//error_log("OB2: " . (string)($ob) . PHP_EOL, 3, "error.log");
$ob = 0;
} else
apc_delete('myob');
/*
session_id("g11");
session_start();
error_log("Check Global: " . (string)(isset($_SESSION["myob"]) == true) . PHP_EOL, 3, "error.log");
$ob = 0;
if(isset($_SESSION["myob"])) {
$ob = $_SESSION["myob"];
unset($_SESSION["myob"]);
}
session_write_close();
*/
// error_log("else Session ID11: " . (string)(session_id(11)) . PHP_EOL, 3, "error.log");
// error_log("else OB2: " . (string)($_SESSION["myob"]) . PHP_EOL, 3, "error.log");
//if (session_id($current_id) === "") {
// session_start();
// error_log("OB11: " . (string)($_SESSION["myob"]) . PHP_EOL, 3, "error.log");
//} else {
// error_log("else OB11: " . (string)($_SESSION["myob"]) . PHP_EOL, 3, "error.log");
//}
//session_id($current_id);
//session_start();
//error_log("OB at end: " . (string)($_SESSION['myob']) . PHP_EOL, 3, "error.log");
//error_log("==== OB from g11 ==== " . (string)($ob) . PHP_EOL, 3, "error.log");
//error_log("Session ID: " . (string)(session_id()) . PHP_EOL, 3, "error.log");
return $ob;
}
/*
function set_global($val) {
$current_id = session_id();
//session_write_close();
//Set a global session with session_id = 11
if (session_id(11) === "") { session_start(); }
//session_id(11);
//session_start();
//error_log("2) session id:" . session_id() . PHP_EOL, 3, "error.log");
$_SESSION["myob"] = $val;
session_write_close();
if (session_id($current_id) === "") { session_start(); }
//session_id($current_id);
//session_start();
}
*/
function send($ob)
{
echo $ob;
echo "\n\n";
//echo "event: ping\n";
//echo 'data: {"opid" : "kuku"}' . "\n";
//printf ('data: {"time" : "%s"}' . "\n", date('d/m H:i:s'));
//printf ('data: {"opid" : "approved", "time" : "%s"}' . "\n", date('d/m H:i:s'));
//echo "\n";
//echo "data: kuku\n\n";
// print 'data: {"opid" : "approved"}' . PHP_EOL;
// print PHP_EOL;
//ob_end_flush();
ob_flush();
flush();
//ob_start();
}
/*
//error_log("==== isset ==== " . (string)(!isset($_GET['msg']) == false), 3, "error.log");
$msg = "";
if (!isset($_GET['msg'])) {
error_log("==== _GET['msg'] not set ====", 3, "error.log");
$posts = explode("&", file_get_contents('php://input'));
foreach($posts as $tmp) {
//$param[explode('=', $tmp)[0]] = explode('=', $tmp)[1]; //PHP version issues
$p = explode('=', $tmp);
$msg = $p[1];
error_log("==== P[0] ==== " . $p[1], 3, "error.log");
}
} else {
error_log("==== _GET['msg'] set ====", 3, "error.log");
$msg = $_GET['msg'];
error_log("==== CURL ==== " . $msg, 3, "error.log");
}
//$msg = $_GET['msg'];
//error_log("==== M222 ==== " . $msg, 3, "error.log");
if(!empty($msg)){
set(1);
//send();
}
*/
while(true) {
// usleep($_sleep_time * 1000000);
// printf ('data: {"op" : "setOwnerSignature", "time" : "%s"}' . "\n\n", date('d/m H:i:s'));
//print 'data: {"opid" : "approved"}' . PHP_EOL . PHP_EOL;
//ob_flush();
//flush();
//if (false) {
if ($ob = check_global()) {
//error_log($ob . PHP_EOL, 3, "error.log");
//set_global(0);
//error_log("Cycle: " . date('d/m H:i:s') . " --- " . session_id() . PHP_EOL, 3, "error.log");
send($ob);
} else {
if(SSEUtils::time_mod($_start, $_keep_alive_time) == 0) {
//error_log(date('d/m H:i:s'), 3, "error.log");
//error_log((time() - $_start) . PHP_EOL, 3, "error.log");
//error_log($_start . PHP_EOL, 3, "error.log");
//No updates needed, send a comment to keep the connection alive.
//From https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events
echo ': ' . sha1(mt_rand()) . "\n\n";
ob_flush();
flush();
}
}
usleep($_sleep_time * 1000000);
}
class SSEUtils {
/*
* @method SSEUtils::time_mod
* @param $start the start timestamp
* @param $n the time interval
* @description Calculate the modulus of time
*/
static public function time_mod($start,$n){
//error_log(time() . " ", 3, "error.log");
//error_log($start . " ", 3, "error.log");
//error_log($n . " ", 3, "error.log");
return (time() - $start) % $n;
}
}