AngularJS XMLHttpRequest

$httpIt is a core service in AngularJS, used to read data from a remote server.

Usage Format:

// 简单的 GET 请求，可以改为 POST
$http({
    method: 'GET',
    url: '/someUrl'
}).then(function successCallback(response) {
        // 请求成功执行代码
    }, function errorCallback(response) {
        // 请求失败执行代码
});

Shorthand Methods

POST and GET Shorthand Method Format:

$http.get('/someUrl', config).then(successCallback, errorCallback);
$http.post('/someUrl', data, config).then(successCallback, errorCallback);

In addition, there are the following shorthand methods:

  • $http.get
  • $http.head
  • $http.post
  • $http.put
  • $http.delete
  • $http.jsonp
  • $http.patch

For more details, see:https://docs.angularjs.org/api/ng/service/$http

Read JSON File

The following is a JSON file stored on the web server:

https://www.example.com/try/angularjs/data/sites.php

{ "sites": [ { "Name": "Example Tutorial", "Url": "www.example.com", "Country": "CN" }, { "Name": "Google", "Url": "www.google.com", "Country": "USA" }, { "Name": "Facebook", "Url": "www.facebook.com", "Country": "USA" }, { "Name": "Weibo", "Url": "www.weibo.com", "Country": "CN" } ] }

AngularJS $http

AngularJS $http is a service used to read data on a web server.

$http.get(url) is a function used to read server data.

Deprecation Notice (v1.5)

In v1.5,$httpofsuccessanderrorthe method has been deprecated. Usethenmethod instead.

Generic Method Example

AngularJS 1.5 and above - Example

var app = angular.module('myApp', []); app.controller('siteCtrl', function($scope, $http) { $http({ method: 'GET', url: 'https://www.example.com/try/angularjs/data/sites.php' }).then(function successCallback(response) { $scope.names = response.data.sites; }, function errorCallback(response) { //Code executed when the request fails }); });

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Shorthand Method Example

AngularJS 1.5 and above - Example

<div ng-app="myApp" ng-controller="siteCtrl"> <ul> <li ng-repeat="x in names"> {{ x.Name + ', ' + x.Country }} </li> </ul> </div> <script> var app = angular.module('myApp', []); app.controller('siteCtrl', function($scope, $http) { $http.get("https://www.example.com/try/angularjs/data/sites.php") .then(function (response) {$scope.names = response.data.sites;}); }); </script>

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AngularJS 1.5 and below - Example

<div ng-app="myApp" ng-controller="siteCtrl"> <ul> <li ng-repeat="x in names"> {{ x.Name + ', ' + x.Country }} </li> </ul> </div> <script> var app = angular.module('myApp', []); app.controller('siteCtrl', function($scope, $http) { $http.get("https://www.example.com/try/angularjs/data/sites.php") .success(function (response) {$scope.names = response.sites;}); }); </script>

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Application Analysis:

Note: The GET request in the above code targets this site's server. You cannot directly copy it and run it locally, as there will be cross-domain issues. The solution is to copy the data from Customers_JSON.php to your own server. See:Best Solutions for PHP Ajax Cross-Domain Issues。

The AngularJS application is defined viang-appthe `ng-app` directive. The application executes in the <div>.

ng-controllerThe directive sets the`controller` objectname.

The functioncustomersControlleris a standard JavaScriptobject constructor.。

The controller object has a property:$scope.names。

$http.get()Reads staticJSON data from the web server.。

The server data file is: https://www.example.com/try/angularjs/data/sites.php。

When loading JSON data from the server,$scope.namesit becomes an array.

Note The above code can also be used to read database data.
Other Extensions