Adding a custom header to HTTP request using angular.js

I am a novice to angular.js, and I am trying to add some headers to a request:

   var config = {headers: {
            'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
            'Accept': 'application/json;odata=verbose'
        }
    };

   $http.get('https://www.example.com/ApplicationData.svc/Malls(1)/Retailers', config).success(successCallback).error(errorCallback);

I've looked at all the documentation, and this seems to me like it should be correct.

When I use a local file for the URL in the $http.get, I see the following HTTP request on the network tab in Chrome:

GET /app/data/offers.json HTTP/1.1
Host: www.example.com
Connection: keep-alive
Cache-Control: max-age=0
If-None-Match: "0f0abc9026855b5938797878a03e6889"
Authorization: Basic Y2hhZHN0b25lbWFuOkNoYW5nZV9tZQ==
Accept: application/json;odata=verbose
X-Requested-With: XMLHttpRequest
If-Modified-Since: Sun, 24 Mar 2013 15:58:55 GMT
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22
X-Testing: Testing
Referer: http://www.example.com/app/index.html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

As you can see, both of the headers were added correctly. But when I change the URL to the one shown in the $http.get above (except using the real address, not example.com), then I get:

OPTIONS /ApplicationData.svc/Malls(1) HTTP/1.1
Host: www.datahost.net
Connection: keep-alive
Access-Control-Request-Method: GET
Origin: http://mpon.site44.com
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22
Access-Control-Request-Headers: accept, origin, x-requested-with, authorization, x-testing
Accept: */*
Referer: http://mpon.site44.com/app/index.html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

The only difference in code between these two is one is for the first the URL is a local file, and for the second the URL is a remote server. If you look at the second Request header, there is no Authentication header, and the Accept appears to be using a default instead of the one specified. Also, the first line now says OPTIONS instead of GET (although Access-Control-Request-Method is GET).

Any idea what is wrong with the above code, or how to get the additional headers included using when not using a local file as a data source?

I took what you had, and added another X-Testing header

var config = {headers:  {
        'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
        'Accept': 'application/json;odata=verbose',
        "X-Testing" : "testing"
    }
};

$http.get("/test", config);

And in the Chrome network tab, I see them being sent.

GET /test HTTP/1.1
Host: localhost:3000
Connection: keep-alive
Accept: application/json;odata=verbose
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.172 Safari/537.22
Authorization: Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==
X-Testing: testing
Referer: http://localhost:3000/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

Are you not seeing them from the browser, or on the server? Try the browser tooling or a debug proxy and see what is being sent out.

Basic authentication using HTTP POST method:

$http({
    method: 'POST',
    url: '/API/authenticate',
    data: 'username=' + username + '&password=' + password + '&email=' + email,
    headers: {
        "Content-Type": "application/x-www-form-urlencoded",
        "X-Login-Ajax-call": 'true'
    }
}).then(function(response) {
    if (response.data == 'ok') {
        // success
    } else {
        // failed
    }
});

...and GET method call with header:

$http({
    method: 'GET',
    url: '/books',
    headers: {
        'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
        'Accept': 'application/json',
        "X-Login-Ajax-call": 'true'
    }
}).then(function(response) {
    if (response.data == 'ok') {
        // success
    } else {
        // failed
    }
});

If you want to add your custom headers to ALL requests, you can change the defaults on $httpProvider to always add this header…

app.config(['$httpProvider', function ($httpProvider) {
    $httpProvider.defaults.headers.common = { 
        'Authorization': 'Basic d2VudHdvcnRobWFuOkNoYW5nZV9tZQ==',
        'Accept': 'application/json;odata=verbose'
      };
}]);

my suggestion will be add a function call settings like this inside the function check the header which is appropriate for it. I am sure it will definitely work. it is perfectly working for me.

function getSettings(requestData) {
    return {
        url: requestData.url,
        dataType: requestData.dataType || "json",
        data: requestData.data || {},
        headers: requestData.headers || {
            "accept": "application/json; charset=utf-8",
            'Authorization': 'Bearer ' + requestData.token
        },
        async: requestData.async || "false",
        cache: requestData.cache || "false",
        success: requestData.success || {},
        error: requestData.error || {},
        complete: requestData.complete || {},
        fail: requestData.fail || {}
    };
}

then call your data like this

    var requestData = {
        url: 'API end point',
        data: Your Request Data,
        token: Your Token
    };

    var settings = getSettings(requestData);
    settings.method = "POST"; //("Your request type")
    return $http(settings);