OperationContext In Http Protocol and Http Headers

Signalgo support http and https protocols too, but in signalgo every protocols architecture are same.if you setting your operation context setting like http,it will work with all protocol because http protocol operation context setting is a little more complicated (use one or two attribute).

lets start:

1.Create a setting example for your operation context:

    /// <summary>
    /// this is your operation context seeting save and use it everywhere you want
    /// </summary>
    public class CurrentUserInfo
    {

        /// <summary>
        /// instade of using OperationContext<CurrentUserInfo>.CurrentSetting you can use CurrentUserInfo.Current to fast access the current setting of context
        /// </summary>
        public static CurrentUserInfo Current
        {
            get
            {
                return OperationContext<CurrentUserInfo>.CurrentSetting;
            }
        }
        /// <summary>
        /// fast access to current user id
        /// </summary>
        public static int UserId
        {
            get
            {
                return Current.UserInfo.Id;
            }
        }

        /// <summary>
        /// simple databse model, save current user loggined to memory and use it everywhere witout query to database
        /// </summary>
        public UserInfo UserInfo { get; set; }

        /// <summary>
        /// you current session will save on here with HttpKey used on top of property
        /// </summary>
        [HttpKey]
        public string Session { get; set; }

        /// <summary>
        /// you can set date time for expire time of session and user have to login again
        /// </summary>
        [HttpKey(KeyType = HttpKeyType.ExpireField)]
        public DateTime ExpireDateTime { get; set; }

        /// <summary>
        /// a simple custome user role for admin users
        /// </summary>
        public bool IsAdmin { get; set; }
        /// <summary>
        /// a simple custome user role for normal users
        /// </summary>
        public bool IsNormalUser { get; set; }
    }

2.Use your setting in you login or authentication method like this:

 //create Authentication service with http protocol
 [ServiceContract("Authentication", ServiceType.HttpService, InstanceType.SingleInstance)]
 public class AuthenticationService
 {
        public string Login(string userName, string password)
        {
            //sample for  use entity framework database
            using (ExpertContext context = new ExpertContext())
            {
                //example of query to users table
                UserInfo user = context.UserInfoes.FirstOrDefault(x => x.UserName == userName x.Password == password);
                //if username and password was wrong
                if (user == null)
                    return "UsernameOrPasswordIncorrect";
                //generate a guid token
                string userToken = Guid.NewGuid().ToString();
                //authenticate user to signalgo system
                OperationContext<CurrentUserInfo>.CurrentSetting = new CurrentUserInfo()
                {
                    UserInfo = user,
                    ExpireDateTime = DateTime.Now.AddDays(1),
                    Session = userToken,
                    IsAdmin = user.Id == 1,
                    IsNormalUser = true
                };
                return "success login";
            }
        }

        /// <summary>
        /// check who called this method
        /// </summary>
        /// <returns></returns>
        public string CheckWhoAmI()
        {
            if (CurrentUserInfo.Current == null)
                return "user is not loggined";
            return CurrentUserInfo.Current.UserInfo.UserName;
        }
 }

3.Call your service with http protocol (everywhere you can,postman,browser etc):

call this in browser: http://localhost:8520/Authentication/Login?userName="testUserName"&password=123

then check Authentication with call: http://localhost:8520/Authentication/CheckWhoAmI

How to use http headers?

                //for request headers
                if (OperationContext.Current.HttpClient.RequestHeaders.TryGetValue("content-length", out string[] contentLengthValues))
                {
                    var value = contentLengthValues.FirstOrDefault();
                }
                //for response header example
                OperationContext.Current.HttpClient.ResponseHeaders.Add("Content-Type", "application/json");