from jquery $.ajax to angular $http

Question

I have this piece of jQuery code that works fine cross origin:

jQuery.ajax({
    url: "http://example.appspot.com/rest/app",
    type: "POST",
    data: JSON.stringify({"foo":"bar"}),
    dataType: "json",
    contentType: "application/json; charset=utf-8",
    success: function (response) {
        console.log("success");
    },
    error: function (response) {
        console.log("failed");
    }
});

Now I'm tring to convert this to Angular.js code without any success:

$http({
    url: "http://example.appspot.com/rest/app",
    dataType: "json",
    method: "POST",
    data: JSON.stringify({"foo":"bar"}),
    headers: {
        "Content-Type": "application/json; charset=utf-8"
    }
}).success(function(response){
    $scope.response = response;
}).error(function(error){
    $scope.error = error;
});

Any help appreciated.

Solution 1

The AngularJS way of calling $http would look like:

$http({
    url: "http://example.appspot.com/rest/app",
    method: "POST",
    data: {"foo":"bar"}
}).then(function successCallback(response) {
        // this callback will be called asynchronously
        // when the response is available
        $scope.data = response.data;
    }, function errorCallback(response) {
        // called asynchronously if an error occurs
        // or server returns response with an error status.
        $scope.error = response.statusText;
});

or could be written even simpler using shortcut methods:

$http.post("http://example.appspot.com/rest/app", {"foo":"bar"})
.then(successCallback, errorCallback);

There are number of things to notice:

• AngularJS version is more concise (especially using .post() method)
• AngularJS will take care of converting JS objects into JSON string and setting headers (those are customizable)
• Callback functions are named success and error respectively (also please note parameters of each callback) - Deprecated in angular v1.5
• use then function instead.
• More info of then usage can be found here

The above is just a quick example and some pointers, be sure to check AngularJS documentation for more: http://docs.angularjs.org/api/ng.$http

Solution 2

We can implement ajax request by using http service in AngularJs, which helps to read/load data from remote server.

$http service methods are listed below,

 $http.get()
 $http.post()
 $http.delete()
 $http.head()
 $http.jsonp()
 $http.patch()
 $http.put()

One of the Example:

    $http.get("sample.php")
        .success(function(response) {
            $scope.getting = response.data; // response.data is an array
    }).error(){

        // Error callback will trigger
    });

http://www.drtuts.com/ajax-requests-angularjs/

Comments

[Endless]

Good to know! however i don't thing its client error i'm dealing with, Angular change the Request method to OPTIONS. think i have to do some server side stuff to support it

[pkozlowski.opensource]

Yes, I guess you need to sort out server-side problems first. Then you will be able to enjoy full power of angular's $http on the client side. Probably you see an additional OPTIONS request since AngularJS is sending more / different headers as compared to jQuery.

[xander27]

NOTE: in get "params:" but not "data:" see stackoverflow.com/questions/13760070/…

[pkozlowski.opensource]

params and data are 2 different things: params end up in the URL (query string) while data - in request body (only for request types that actually can have body).

[notbrain]

Just a note that $.param is jQuery, so you'll need jQuery loaded to use it. For a jQuery-free example using $http transformRequest interceptor, see pastebin.com/zsn9ASkM

[Andrew Luhring]

"Angular change the Request method to OPTIONS. think i have to do some server side stuff to support it " I'm having the same problem, what does angular add that jquery doesnt?

[jnm2]

@Brian Wait a minute, isn't jQuery a dependency of AngularJS? You'll never have $http without jQuery first being loaded.

[notbrain]

@jnm2 - no, jQuery is not a dependency of AngularJS. $http refers to the Angular $http service component, not anything from jQuery. AngularJS does have a "jQuery Lite" available for manipulating the DOM, but it's very limited. From Angular element - If jQuery is available, angular.element is an alias for the jQuery function. If jQuery is not available, angular.element delegates to Angular's built-in subset of jQuery, called "jQuery lite" or "jqLite."