How to skip angularjs interceptor for HTTP request?

Question

I have an angularjs application in which I have an interceptor that adds an authorization token to the header of each request.

However, somewhere in the application I need to use an external API, where the interceptor destroys it because it adds this authorization header, which is not acceptable for this external API provider. How can I get angularjs HTTP to skip the interceptor, only in this particular case?

Interceptor code below:

app.factory('authInterceptorService', ['$q', '$injector', '$location', 'localStorageService', function ($q, $injector, $location, localStorageService) {
    var authInterceptorServiceFactory = {};
    var $http;

    var _request = function (config) {

        config.headers = config.headers || {};

        var authData = localStorageService.get('authorizationData');
        if (authData) {
            //console.log("token: " + authData.token.substring(0, 10));
            //console.log("user: " + authData.userName);
            config.headers.Authorization = 'Bearer ' + authData.token;
        }
        return config;
    }

    var _responseError = function (rejection) {
        var deferred = $q.defer();
        if (rejection.status === 401) {
            var authService = $injector.get('authService');
            authService.refreshToken().then(function (response) {
                _retryHttpRequest(rejection.config, deferred);
            }, function () {
                authService.logOut();
                $location.path('/login');
                deferred.reject(rejection);
            });
        } else {
            deferred.reject(rejection);
        }
        return deferred.promise;
    }

    var _retryHttpRequest = function (config, deferred) {
        console.log('retrying');
        $http = $http || $injector.get('$http');
        $http(config).then(function (response) {
            deferred.resolve(response);
            //console.log("success:" +response);
        }, function (response) {
            deferred.reject(response);
            //console.log("error:" + response);
        });
    }

    authInterceptorServiceFactory.request = _request;
    authInterceptorServiceFactory.responseError = _responseError;

    return authInterceptorServiceFactory;
}]);

Answer 1

Easy

$http.get("url" , {noAuth : true}).then(success(),error());

At Interceptor

  var _request = function (config) {

    config.headers = config.headers || {};

    var authData = localStorageService.get('authorizationData');
    if (authData && !config.noAuth) {
        //console.log("token: " + authData.token.substring(0, 10));
        //console.log("user: " + authData.userName);
        config.headers.Authorization = 'Bearer ' + authData.token;
    }
    return config;
}

Answer 2

Write like this: -

   var _request = function (config) {
    if (config.url.indexOf('yourExternalApiUrl') > -1) {
         return config;
    } else {
         config.headers = config.headers || {};
         var authData = localStorageService.get('authorizationData');
         if (authData) {
             //console.log("token: " + authData.token.substring(0, 10));
             //console.log("user: " + authData.userName);
             config.headers.Authorization = 'Bearer ' + authData.token;
         }
    return config;
    }        
}

: http://www.codemosquitoes.com/2016/06/using-angularjs-interceptors-with-http.html

Answer 3

Simple Change this line

if (authData) {

to

if (authData && !config.headers.hasOwnProperty('Authorization')) {

And for any request where you do not want the header to be used, use

$http({
    headers { Authorization: null },
    // and the rest
})