You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.1 KiB
JavaScript
110 lines
3.1 KiB
JavaScript
define("dojo/request/watch", [
|
|
'./util',
|
|
'../errors/RequestTimeoutError',
|
|
'../errors/CancelError',
|
|
'../_base/array',
|
|
'../_base/window',
|
|
'../has!host-browser?dom-addeventlistener?:../on:'
|
|
], function(util, RequestTimeoutError, CancelError, array, win, on){
|
|
// avoid setting a timer per request. It degrades performance on IE
|
|
// something fierece if we don't use unified loops.
|
|
var _inFlightIntvl = null,
|
|
_inFlight = [];
|
|
|
|
function watchInFlight(){
|
|
// summary:
|
|
// internal method that checks each inflight XMLHttpRequest to see
|
|
// if it has completed or if the timeout situation applies.
|
|
|
|
var now = +(new Date);
|
|
|
|
// we need manual loop because we often modify _inFlight (and therefore 'i') while iterating
|
|
for(var i = 0, dfd; i < _inFlight.length && (dfd = _inFlight[i]); i++){
|
|
var response = dfd.response,
|
|
options = response.options;
|
|
if((dfd.isCanceled && dfd.isCanceled()) || (dfd.isValid && !dfd.isValid(response))){
|
|
_inFlight.splice(i--, 1);
|
|
watch._onAction && watch._onAction();
|
|
}else if(dfd.isReady && dfd.isReady(response)){
|
|
_inFlight.splice(i--, 1);
|
|
dfd.handleResponse(response);
|
|
watch._onAction && watch._onAction();
|
|
}else if(dfd.startTime){
|
|
// did we timeout?
|
|
if(dfd.startTime + (options.timeout || 0) < now){
|
|
_inFlight.splice(i--, 1);
|
|
// Cancel the request so the io module can do appropriate cleanup.
|
|
dfd.cancel(new RequestTimeoutError('Timeout exceeded', response));
|
|
watch._onAction && watch._onAction();
|
|
}
|
|
}
|
|
}
|
|
|
|
watch._onInFlight && watch._onInFlight(dfd);
|
|
|
|
if(!_inFlight.length){
|
|
clearInterval(_inFlightIntvl);
|
|
_inFlightIntvl = null;
|
|
}
|
|
}
|
|
|
|
function watch(dfd){
|
|
// summary:
|
|
// Watches the io request represented by dfd to see if it completes.
|
|
// dfd: Deferred
|
|
// The Deferred object to watch.
|
|
// response: Object
|
|
// The object used as the value of the request promise.
|
|
// validCheck: Function
|
|
// Function used to check if the IO request is still valid. Gets the dfd
|
|
// object as its only argument.
|
|
// ioCheck: Function
|
|
// Function used to check if basic IO call worked. Gets the dfd
|
|
// object as its only argument.
|
|
// resHandle: Function
|
|
// Function used to process response. Gets the dfd
|
|
// object as its only argument.
|
|
if(dfd.response.options.timeout){
|
|
dfd.startTime = +(new Date);
|
|
}
|
|
|
|
if(dfd.isFulfilled()){
|
|
// bail out if the deferred is already fulfilled
|
|
return;
|
|
}
|
|
|
|
_inFlight.push(dfd);
|
|
if(!_inFlightIntvl){
|
|
_inFlightIntvl = setInterval(watchInFlight, 50);
|
|
}
|
|
|
|
// handle sync requests separately from async:
|
|
// http://bugs.dojotoolkit.org/ticket/8467
|
|
if(dfd.response.options.sync){
|
|
watchInFlight();
|
|
}
|
|
}
|
|
|
|
watch.cancelAll = function cancelAll(){
|
|
// summary:
|
|
// Cancels all pending IO requests, regardless of IO type
|
|
try{
|
|
array.forEach(_inFlight, function(dfd){
|
|
try{
|
|
dfd.cancel(new CancelError('All requests canceled.'));
|
|
}catch(e){}
|
|
});
|
|
}catch(e){}
|
|
};
|
|
|
|
if(win && on && win.doc.attachEvent){
|
|
// Automatically call cancel all io calls on unload in IE
|
|
// http://bugs.dojotoolkit.org/ticket/2357
|
|
on(win.global, 'unload', function(){
|
|
watch.cancelAll();
|
|
});
|
|
}
|
|
|
|
return watch;
|
|
});
|