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我正在研究離子（1）應用程序，我在本地開發手機。XHR .timeout不起作用
我試圖通過模擬一個XHR請求超時：
request.timeout = 1;
但它不會去.ontimeout() ...
任何想法？
下面是完整的功能：
function getDBfileXHR(url, serverAttempts) {
return new Promise(function (resolve, reject) {
var request = new XMLHttpRequest();
request.open("GET", url, true);
request.timeout = 1;
if (url === "proDB.jsonp") {
console.log("-Asking local proDB.json...");
} else {
console.log("-Sending XMLHttpRequest...");
}
request.ontimeout = function() {
console.error("Timeout : the XHR request timed out !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! serverAttempts = " + serverAttempts);
reject({
status: this.status,
statusText: request.statusText
});
};
request.onreadystatechange = function(event) {
switch (this.readyState) {
case 0:
console.warn('-XMLHttpRequest readyState is UNSENT');
break;
case 1:
console.warn('-XMLHttpRequest readyState is OPENED');
break;
case 2:
console.warn('-XMLHttpRequest readyState is HEADERS_RECEIVED');
break;
case 3:
console.warn('-XMLHttpRequest readyState is LOADING');
break;
case 4:
console.warn('-XMLHttpRequest readyState is DONE');
break;
default:
}
};
request.onload = function() {
if ((request.readyState === 4) && ((request.status >= 200 && request.status <= 299) || request.status === 304 || request.status === 0)) {
console.log('-we get response '+request.status+' from XHR in getDBfileXHR');
if (request.status === 304) sendToServer.sendErrorEmail("BL: request.status === 304 juste pour info", 21);
var jsonText = request.responseText.replace("callback(", "").replace(");", "");
if (jsonText === '') {
console.error('-error : request.status = ' + request.status + ', but jsonText is empty for url=' + url);
sendToServer.sendErrorEmail("BL: jsonText is empty, trying to reach server another time", 11);
sendToServer.sendErrorEmail("BL: jsonText is empty and attempted to reach server more than twice", 14);
var alertPopup = $ionicPopup.alert({
title: 'Error '+"11, jsonText is empty",
template: "The surfboard database could not be updated, you won't see the new models in the list, sorry for the inconvenience.",
buttons: [{
text:'OK',
type: 'button-light'
}]
});
reject({
status: this.status,
statusText: request.statusText
});
} else {
var parsedJson;
try {
parsedJson = JSON.parse(jsonText);
} catch (e) {
console.warn("Problem when trying to JSON.parse(jsonText) : ");
console.warn(e);
console.warn("parsedJson :");
console.warn(parsedJson);
}
if (parsedJson) {
var prodata = jsonToVarProdata(parsedJson);
console.log('-writing new prodata to localStorage');
console.log('last line of prodata:' + JSON.stringify(prodata[prodata.length-1]));
storageService.persist('prodata', prodata);
storageService.store('gotANewDB', 1);
} else {
console.error ('WARNINNNNG ! parsedJson is not good...can t write prodata to localStorage');
}
resolve(request.response);
dbReadyDeferred.resolve();
}
} else {
console.log('-bad request, request.readyState= ' + request.readyState + ' and resquest.status = '+request.status+' from XHR in getDBfileXHR');
sendToServer.sendErrorEmail("BL: request.status is bad, no boards are displayed in the list !!!!", 41);
}
};
request.onerror = function() {
reject({
status: this.status,
statusText: request.statusText
});
};
console.log("sending request.send()");
request.send();
});
}