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Heartbeat API: throttle down when the window looses focus or when the user is inactive, always send 'screen_id', change the interval settings to 'fast' (5sec), 'standard' (15sec) and 'slow' (60sec), the interval can be changed from PHP, see #23216 

git-svn-id: https://develop.svn.wordpress.org/trunk@23382 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Andrew Ozz 2013-02-03 07:03:27 +00:00
parent 7f2205971c
commit 682b66b560
2 changed files with 296 additions and 77 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
wp-admin/includes/ajax-actions.php
View File

@ -2074,10 +2074,13 @@ function wp_ajax_send_link_to_editor() {
function wp_ajax_heartbeat() {
check_ajax_referer( 'heartbeat-nonce', '_nonce' );
$response = array( 'pagenow' => '' );
$response = array();
if ( ! empty($_POST['pagenow']) )
$response['pagenow'] = sanitize_key($_POST['pagenow']);
// screenid is the same as $current_screen->id and the JS global 'pagenow'
if ( ! empty($_POST['screenid']) )
$screen_id = sanitize_key($_POST['screenid']);
else
$screen_id = 'site';
if ( ! empty($_POST['data']) ) {
$data = (array) $_POST['data'];
@ -2087,16 +2090,20 @@ function wp_ajax_heartbeat() {
// todo: separate filters: 'heartbeat_[action]' so we call different callbacks only when there is data for them,
// or all callbacks listen to one filter and run when there is something for them in $data?
$response = apply_filters( 'heartbeat_received', $response, $data );
$response = apply_filters( 'heartbeat_received', $response, $data, $screen_id );
}
$response = apply_filters( 'heartbeat_send', $response );
$response = apply_filters( 'heartbeat_send', $response, $screen_id );
// Allow the transport to be replaced with long-polling easily
do_action( 'heartbeat_tick', $response );
do_action( 'heartbeat_tick', $response, $screen_id );
// always send the current time acording to the server
$response['time'] = time();
// send the current time acording to the server
$response['servertime'] = time();
// Change the interval, format: array( speed, ticks )
if ( isset($response['heartbeat_interval']) )
$response['heartbeat_interval'] = (array) $response['heartbeat_interval'];
wp_send_json($response);
}

350
wp-includes/js/heartbeat.js
View File

@ -9,14 +9,22 @@ window.wp = window.wp || {};
var Heartbeat = function() {
var self = this,
running,
timeout,
beat,
nonce,
screen = typeof pagenow != 'undefined' ? pagenow : '',
screenid = typeof pagenow != 'undefined' ? pagenow : '',
settings,
tick = 0,
queue = {},
interval,
lastconnect = 0;
lastconnect = 0,
connecting,
countdown,
tempInterval,
hasFocus = true,
isUserActive,
userActiveEvents,
winBlurTimeout,
frameBlurTimeout = -1;
this.url = typeof ajaxurl != 'undefined' ? ajaxurl : 'wp-admin/admin-ajax.php';
this.autostart = true;
@ -29,15 +37,22 @@ window.wp = window.wp || {};
nonce = settings.nonce || '';
delete settings.nonce;
interval = settings.interval || 15000; // default interval
interval = settings.interval || 15; // default interval
delete settings.interval;
// todo: needed?
// 'pagenow' can be added from settings if not already defined
screen = screen || settings.pagenow;
delete settings.pagenow;
// The interval can be from 5 to 60 sec.
if ( interval < 5 )
interval = 5;
else if ( interval > 60 )
interval = 60;
// Add public vars
interval = interval * 1000;
// todo: needed?
// 'screenid' can be added from settings on the front-end where the JS global 'pagenow' is not set
screenid = screenid || settings.screenid || 'site';
delete settings.screenid;
// Add or overwrite public vars
$.extend( this, settings );
}
@ -48,14 +63,15 @@ window.wp = window.wp || {};
return (new Date()).getTime();
}
// Set error state and fire an event if it persists for over 3 min
// Set error state and fire an event if errors persist for over 2 min when the window has focus
// or 6 min when the window is in the background
function errorstate() {
var since;
if ( lastconnect ) {
since = time() - lastconnect;
since = time() - lastconnect, duration = hasFocus ? 120000 : 360000;
if ( since > 180000 ) {
if ( since > duration ) {
self.connectionLost = true;
$(document).trigger( 'heartbeat-connection-lost', parseInt(since / 1000) );
} else if ( self.connectionLost ) {
@ -70,88 +86,171 @@ window.wp = window.wp || {};
tick = time();
data.data = $.extend( {}, queue );
queue = {};
data.interval = interval / 1000;
data._nonce = nonce;
data.action = 'heartbeat';
data.pagenow = screen;
data.screenid = screenid;
data.has_focus = hasFocus;
connecting = true;
self.xhr = $.post( self.url, data, 'json' )
.done( function( data, textStatus, jqXHR ) {
var interval;
// Clear the data queue
queue = {};
self.xhr = $.post( self.url, data, function(r){
lastconnect = time();
// Clear error state
lastconnect = time();
if ( self.connectionLost )
errorstate();
self.tick(r);
}, 'json' ).always( function(){
// Change the interval from PHP
interval = data.heartbeat_interval;
delete data.heartbeat_interval;
self.tick( data, textStatus, jqXHR );
// do this last, can trigger the next XHR
if ( interval )
self.interval.apply( self, data.heartbeat_interval );
}).always( function(){
connecting = false;
next();
}).fail( function(r){
}).fail( function( jqXHR, textStatus, error ){
errorstate();
self.error(r);
self.error( jqXHR, textStatus, error );
});
};
function next() {
var delta = time() - tick;
var delta = time() - tick, t = interval;
if ( !running )
return;
if ( delta < interval ) {
timeout = window.setTimeout(
if ( !hasFocus ) {
t = 120000; // 2 min
} else if ( countdown && tempInterval ) {
t = tempInterval;
countdown--;
}
window.clearTimeout(beat);
if ( delta < t ) {
beat = window.setTimeout(
function(){
if ( running )
connect();
},
interval - delta
t - delta
);
} else {
window.clearTimeout(timeout); // this has already expired?
connect();
}
};
}
this.interval = function(seconds) {
if ( seconds ) {
// Limit
if ( 5 > seconds || seconds > 60 )
return false;
function blurred() {
window.clearTimeout(winBlurTimeout);
window.clearTimeout(frameBlurTimeout);
winBlurTimeout = frameBlurTimeout = 0;
interval = seconds * 1000;
} else if ( seconds === 0 ) {
// Allow long polling to be turned on
interval = 0;
hasFocus = false;
// temp debug
if ( self.debug )
console.log('### blurred(), slow down...')
}
function focused() {
window.clearTimeout(winBlurTimeout);
window.clearTimeout(frameBlurTimeout);
winBlurTimeout = frameBlurTimeout = 0;
isUserActive = time();
if ( hasFocus )
return;
hasFocus = true;
window.clearTimeout(beat);
if ( !connecting )
next();
// temp debug
if ( self.debug )
console.log('### focused(), speed up... ')
}
function setFrameEvents() {
$('iframe').each( function(i, frame){
if ( $.data(frame, 'wp-heartbeat-focus') )
return;
$.data(frame, 'wp-heartbeat-focus', 1);
$(frame.contentWindow).on('focus.wp-heartbeat-focus', function(e){
focused();
}).on('blur.wp-heartbeat-focus', function(e){
setFrameEvents();
frameBlurTimeout = window.setTimeout( function(){ blurred(); }, 500 );
});
});
}
$(window).on('blur.wp-heartbeat-focus', function(e){
setFrameEvents();
winBlurTimeout = window.setTimeout( function(){ blurred(); }, 500 );
}).on('focus.wp-heartbeat-focus', function(){
$('iframe').each( function(i, frame){
$.removeData(frame, 'wp-heartbeat-focus');
$(frame.contentWindow).off('.wp-heartbeat-focus');
});
focused();
});
function userIsActive() {
userActiveEvents = false;
$(document).off('.wp-heartbeat-active');
$('iframe').each( function(i, frame){
$(frame.contentWindow).off('.wp-heartbeat-active');
});
focused();
// temp debug
if ( self.debug )
console.log( 'userIsActive()' );
}
// Set 'hasFocus = true' if user is active and the window is in the background.
// Set 'hasFocus = false' if the user has been inactive (no mouse or keyboard activity) for 5 min. even when the window has focus.
function checkUserActive() {
var lastActive = isUserActive ? time() - isUserActive : 0;
// temp debug
if ( self.debug )
console.log( 'checkUserActive(), lastActive = %s seconds ago', parseInt(lastActive / 1000) || 'null' );
// Throttle down when no mouse or keyboard activity for 5 min
if ( lastActive > 300000 && hasFocus )
blurred();
if ( !userActiveEvents ) {
$(document).on('mouseover.wp-heartbeat-active keyup.wp-heartbeat-active', function(){ userIsActive(); });
$('iframe').each( function(i, frame){
$(frame.contentWindow).on('mouseover.wp-heartbeat-active keyup.wp-heartbeat-active', function(){ userIsActive(); });
});
userActiveEvents = true;
}
return interval / 1000;
};
this.start = function() {
// start only once
if ( running )
return false;
running = true;
connect();
return true;
};
this.stop = function() {
if ( !running )
return false;
if ( self.xhr )
self.xhr.abort();
running = false;
return true;
}
this.send = function(action, data) {
if ( action )
queue[action] = data;
}
// Check for user activity every 30 seconds.
window.setInterval( function(){ checkUserActive(); }, 30000 );
if ( this.autostart ) {
$(document).ready( function(){
@ -161,15 +260,128 @@ window.wp = window.wp || {};
next();
});
}
this.winHasFocus = function() {
return hasFocus;
}
/**
* Get/Set the interval
*
* When setting the interval to 'fast', the number of ticks is specified wiht the second argument, default 30.
* If the window doesn't have focus, the interval is overridden to 2 min. In this case setting the 'ticks'
* will start counting after the window gets focus.
*
* @param string speed Interval speed: 'fast' (5sec), 'standard' (15sec) default, 'slow' (60sec)
* @param int ticks Number of ticks for the changed interval, optional when setting 'standard' or 'slow'
* @return int Current interval in seconds
*/
this.interval = function(speed, ticks) {
var reset, seconds;
if ( speed ) {
switch ( speed ) {
case 'fast':
seconds = 5;
countdown = parseInt(ticks) || 30;
break;
case 'slow':
seconds = 60;
countdown = parseInt(ticks) || 0;
break;
case 'long-polling':
// Allow long polling, (experimental)
interval = 0;
return 0;
break;
default:
seconds = 15;
countdown = 0;
}
// Reset when the new interval value is lower than the current one
reset = seconds * 1000 < interval;
if ( countdown ) {
tempInterval = seconds * 1000;
} else {
interval = seconds * 1000;
tempInterval = 0;
}
if ( reset )
next();
}
if ( !hasFocus )
return 120;
return tempInterval ? tempInterval / 1000 : interval / 1000;
};
// Start. Has no effect if heartbeat is already running
this.start = function() {
if ( running )
return false;
running = true;
connect();
return true;
};
// Stop. If a XHR is in progress, abort it
this.stop = function() {
if ( self.xhr && self.xhr.readyState != 4 )
self.xhr.abort();
running = false;
return true;
}
/**
* Send data with the next XHR
*
* As the data is sent later, this function doesn't return the XHR response.
* To see the response, use the custom jQuery event 'heartbeat-tick' on the document, example:
* $(document).on('heartbeat-tick.myname', function(data, textStatus, jqXHR) {
* // code
* });
* If the same 'handle' is used more than once, the data is overwritten when the third argument is 'true'.
* Use wp.heartbeat.isQueued('handle') to see if any data is already queued for that handle.
*
* $param string handle Unique handle for the data. The handle is used in PHP to receive the data
* $param mixed data The data to be sent
* $param bool overwrite Whether to overwrite existing data in the queue
* $return bool Whether the data was queued or not
*/
this.send = function(handle, data, overwrite) {
if ( handle ) {
if ( queue.hasOwnProperty(handle) && !overwrite )
return false;
queue[handle] = data;
return true;
}
return false;
}
/**
* Check if data with a particular handle is queued
*
* $param string handle The handle for the data
* $return mixed The data queued with that handle or null
*/
this.isQueued = function(handle) {
return queue[handle];
}
}
$.extend( Heartbeat.prototype, {
tick: function(r) {
$(document).trigger( 'heartbeat-tick', r );
tick: function(data, textStatus, jqXHR) {
$(document).trigger( 'heartbeat-tick', [data, textStatus, jqXHR] );
},
error: function(r) {
$(document).trigger( 'heartbeat-error', r );
error: function(jqXHR, textStatus, error) {
$(document).trigger( 'heartbeat-error', [jqXHR, textStatus, error] );
}
});