I am beginner in java script and does not understand how to create synchronous Ajax call using $http object if anybody have idea please guide me, how i can make Ajax call by $http sychronously
my code as follow -
var AjaxModule = angular.module('AjaxModule',[]);
AjaxModule.controller('AjaxController',function($scope,$http){
var path ="http://localhost/services_ajax/";
var serviceName = 'customers';
var response = $http.get(path+serviceName);
response.success(function(data){
$scope.list = data;
});
});
You can not make a synchronous request using $http service. It is hard coded to be asynchronous in the service code. You can, however, make your own synchronous service.
var myApp = angular.module('myApp', []);
myApp.service('synchronousService', [function () {
var serviceMethod = function (url) {
var request;
if (window.XMLHttpRequest) {
request = new XMLHttpRequest();
} else if (window.ActiveXObject) {
request = new ActiveXObject("Microsoft.XMLHTTP");
} else {
throw new Error("Your browser don't support XMLHttpRequest");
}
request.open('GET', url, false);
request.send(null);
if (request.status === 200) {
return request.responseText;
}
};
return serviceMethod;
}]);
myApp.controller('AppCtrl', function ($scope, synchronousService) {
var url = "http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20yahoo.finance.quotes%20where%20symbol%20in%20%28%22AAPL%22%29&env=store://datatables.org/alltableswithkeys";
alert(synchronousService(url));
});
Here is working jsfiddle: http://jsfiddle.net/zono/uL0e1j3e/18/
Just to say that the synchronous request is a very bad idea.
you can use the promise concept of angular. promise provide the synchronous facility. i demonstrate you to by giving the demo example
var app = angular.module("myApp",[ ]);
app.controller("ctrl",function($scope,$q,$timeout){
var task1 = $q.defer();
task1.promice.then(function(value){
// write a code here for your task 1 success
} ,function(value){
// write a code here for your task 1 error
});
var task2 = $q.defer();
task2.promice.then(function(value){
// write a code here for your task 2 success
} ,function(value){
// write a code here for your task 2 error
});
$q.all([task1.prpmice,task2.promice])
.then(function(){
// write a code which is executed when both the task are completed
} ,function(){
// write a code which is executed when some of the task are rejected
});
}
the above code will help you to understand the promice concept of angular
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.