CORS post call not working in Angularjs - angularjs

Question

I am trying to implement cross-origin post call from angularjs application, then I get the following error.
Request header field Authorization is not allowed by Access-Control-Allow-Headers in preflight response.
But, when I make a Ajax call it works properly.
How HTTP post call work in angularjs?
Ajax call
$.ajax({
type: 'POST',
url: getAccessTokenUrl,
data: JSON.stringify(clintdata),
dataType: 'json',
contentType: "application/json; charset=utf-8",
success: function(resultData) {
console.log(resultData);
},
error: function (request, status, error) {
console.log(status);
}
});
Angularjs HTTP call
$http({
method: 'POST',
url: getAccessTokenUrl,
data: clientdata,
headers: {
'Authorization': undefined,
'Auth-Token': undefined
}
}).then(function(res){
console.log(res);
}, function(err){
console.log(err);
});
I have some default setting. Authorization is for others REST
$http.defaults.headers.common['Content-Type'] = 'application/json;charset=utf-8;' ;
$http.defaults.headers.common['Auth-Token'] = 'X-Requested-With';
$http.defaults.headers.common['Authorization'] = $('#Authorization').val();

Answer 1

Access-Control-* headers are response headers. They come from the server in response to a request. You do not apply them to your request headers.
If your jQuery request works correctly without adding any additional headers, then your AngularJS request should work the same.
The equivalent jQuery request in AngularJS (including removing the Authorization and Auth-Token headers you've set via defaults) is
$http.post(getAccessTokenUrl, clientdata, {
headers: {
Authorization: undefined,
'Auth-Token': undefined
}
}).then(response => {
console.log(response.data)
})
or the long version
$http({
method: 'POST',
url: getAccessTokenUrl,
data: clientdata,
headers: {
Authorization: undefined,
'Auth-Token': undefined
}
}).then(...)
AngularJS by default...
POSTS requests as application/json content-type
Serializes the data property to JSON
Expects a JSON response
Resolves the $http promise with a response object with the response body parsed as JSON into the data property

Answer 2

Remove the following setting
$http.defaults.headers.common['Auth-Token'] = 'X-Requested-With';
$http.defaults.headers.common['Authorization'] = $('#Authorization').val();
Add Authorization header dynamically from Interceptor
request: function(config) {
if (angular.isUndefined(config.skipInterceptor) || !config.skipInterceptor) {
// add Authorization token
}
return config;
}
Http call like this
$http.post('your url', {
skipInterceptor: true
})