AngularJS XMLHttpRequest

$http 是 AngularJS 中的一個核心服務，用於讀取遠程服務器的數據。

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讀取 JSON 文件

以下是存儲在web服務器上的 JSON 文件：

http://www.runoob.com/try/angularjs/data/Customers_JSON.php

{
"records":
[
{
"Name" : "Alfreds Futterkiste",
"City" : "Berlin",
"Country" : "Germany"
},
{
"Name" : "Berglunds snabbköp",
"City" : "Luleå",
"Country" : "Sweden"
},
{
"Name" : "Centro comercial Moctezuma",
"City" : "México D.F.",
"Country" : "Mexico"
},
{
"Name" : "Ernst Handel",
"City" : "Graz",
"Country" : "Austria"
},
{
"Name" : "FISSA Fabrica Inter. Salchichas S.A.",
"City" : "Madrid",
"Country" : "Spain"
},
{
"Name" : "Galería del gastrónomo",
"City" : "Barcelona",
"Country" : "Spain"
},
{
"Name" : "Island Trading",
"City" : "Cowes",
"Country" : "UK"
},
{
"Name" : "Königlich Essen",
"City" : "Brandenburg",
"Country" : "Germany"
},
{
"Name" : "Laughing Bacchus Wine Cellars",
"City" : "Vancouver",
"Country" : "Canada"
},
{
"Name" : "Magazzini Alimentari Riuniti",
"City" : "Bergamo",
"Country" : "Italy"
},
{
"Name" : "North/South",
"City" : "London",
"Country" : "UK"
},
{
"Name" : "Paris spécialités",
"City" : "Paris",
"Country" : "France"
},
{
"Name" : "Rattlesnake Canyon Grocery",
"City" : "Albuquerque",
"Country" : "USA"
},
{
"Name" : "Simons bistro",
"City" : "København",
"Country" : "Denmark"
},
{
"Name" : "The Big Cheese",
"City" : "Portland",
"Country" : "USA"
},
{
"Name" : "Vaffeljernet",
"City" : "Århus",
"Country" : "Denmark"
},
{
"Name" : "Wolski Zajazd",
"City" : "Warszawa",
"Country" : "Poland"
}
]
}

---

AngularJS $http

AngularJS $http 是一個用於讀取web服務器上數據的服務。

$http.get(url) 是用於讀取服務器數據的函數。

AngularJS 實例

<div ng-app="myApp" ng-controller="customersCtrl"> 

<ul>
  <li ng-repeat="x in names">
    {{ x.Name + ', ' + x.Country }}
  </li>
</ul>

</div>

<script>
var app = angular.module('myApp', []);
app.controller('customersCtrl', function($scope, $http) {
    $http.get("http://www.runoob.com/try/angularjs/data/Customers_JSON.php")
    .success(function(response) {$scope.names = response.records;});
});
</script>

應用解析:

注意：以上代碼的 get 請求是本站的服務器，你不能直接拷貝到你本地運行，會存在跨域問題，解決辦法就是將 Customers_JSON.php 的數據拷貝到你自己的服務器上。

AngularJS 應用通過 ng-app 定義。應用在 <div> 中執行。

ng-controller 指令設置了 controller 對象 名。

函數 customersController 是一個標準的 JavaScript 對象構造器。

控制器對象有一個屬性: $scope.names。

$http.get() 從web服務器上讀取靜態 JSON 數據。

服務器數據文件爲：  http://www.runoob.com/try/angularjs/data/Customers_JSON.php。

當從服務端載入 JSON 數據時，$scope.names 變爲一個數組。