Example - Angular 1.x controller calling data service which in turn calls custom common HTTP service

myAuthSvc.js

angular.module('myModule')
  .service('myAuthSvc', ['$http', '$q', function($http, $q){
  var loggedInUserDetails = null;
  this.getLoggedInUserDetails = function(payload) {
    var deferred = $q.defer();
    if(loggedInUserDetails != null) { deferred.resolve(loggedInUserDetails); }
    else{
      $http.post('<loginURL>', /*payload for login*/)
        .then(function(result){
          loggedInUserDetails = result;
          deferred.resolve(result);
        });
    }
    return deferred.promise;
  }
}]);

myHTTPSvc.js

angular.module('myModule')
  .service('myHTTPSvc', ['$http', '$q', 'myAuthSvc', function($http, $q, myAuthSvc){
  
  this.get = function(url, payload, header) {
    var deferred = $q.defer();
    myAuthSvc.getLoggedInUserDetails()
      .then(function(data){
        var loggedInUserDetails = data;
        var headers = {
          'license': loggedInUserDetails.licenseInfo
        };
        //here you make the actual HTTP call  
        $http.get(url, payload, headers)
          .then(function(result){
            deferred.resolve(result);
          }, function(error){
            deferred.reject(error);
          });      
      });
    return deferred.promise;
  }
}]);

orderService.js

angular.module('myModule')
  .service('orderSvc', ['myHTTPSvc', function(myHTTPSvc){
  
  this.loadOrders = function(payload) {
    // myHTTPSvc will add required headers for the HTTP server
    return myHTTPSvc.get('<loadOrderURL>', payload);
  }
}]);