AngularJS XMLHttpRequest
$http is an AngularJS service for reading data
from remote servers.
Reading a JSON File
The following static JSON file is stored on a web server:
http://www.w3schools.com/website/Customers_JSON.php
[
{
"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 is a core service for reading data from web servers.
$http.get(url) is the function to use for reading server data.
AngularJS Example
<div ng-app="" ng-controller="customersController">
<ul>
<li
ng-repeat="x in names">
{{ x.Name + ', ' + x.Country }}
</li>
</ul>
</div>
<script>
function customersController($scope,$http)
{
$http.get("http://www.w3schools.com/website/Customers_JSON.php")
.success(function(response) {$scope.names
= response;});
}
</script>
Application explained:
The AngularJS application is defined by ng-app. The
application runs inside a <div>.
The ng-controller directive names the controller
object.
The customersController function is a standard JavaScript
object constructor.
AngularJS will invoke customersController with a $scope and
$http object.
$scope is the application object (the owner of
application variables and functions).
$http is an XMLHttpRequest object for requesting
external data.
$http.get() reads static JSON data from
http://www.w3schools.com/website/Customers_JSON.php.
If success, the controller creates a property (names)
in the scope, with JSON
data from the server.
 |
The code above can also be used to fetch data from a database. |
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