RestSharp Returning Unauthorized - vb.net

Question

I am having an issue and think I may be missing something with RestSharp.
I am authorizing and getting back a cookie just fine... see below. But then when I call to get the data it returns unauthorized. It works just fine in Postman but not in the code below. I am using a console app and I have tried to send the cookie via AddHeader, AddCookie, and just as a parameter. The responseLogin does contain the correct cookie. Any help would be great.
Dim clientLogin = New RestClient("http://[URI to Authorize]............")
Dim requestLogin = New RestRequest(Method.POST)
requestLogin.AddParameter("application/x-www-form-urlencoded", "[Username and password here.....]", ParameterType.RequestBody)
Dim responseLogin As IRestResponse = clientLogin.Execute(requestLogin)
Dim client = New RestClient("http://[URI to get data]............")
Dim request = New RestRequest(Method.GET)
request.AddHeader("Cookie", responseLogin.Cookies(0).Value.ToString)
request.AddHeader("Accept", "application/json")
Dim response As IRestResponse = client.Execute(request)

Answer 1

The Cookie header needs to contain the name and value for the cookie, e.g.
Dim authCookie = responseLogin.Cookies(0) ' Probably should find by name
request.AddHeader("Cookie", String.Format("{0}={1}", authCookie.Name, authCookie.Value))
However, the documentation (I've never used RestSharp personally) says that RestSharp has automatic support for cookies, so if you reuse the RestClient instance and set the CookieContainer you shouldn't need to do anything to handle the cookies manually (unless you want to, which in some cases may be preferable).
Dim client = New RestClient(New Uri("[Base URI...]"))
client.CookieContainer = New System.Net.CookieContainer()
Dim requestLogin = New RestRequest("[login page path]", Method.POST)
requestLogin.AddParameter("application/x-www-form-urlencoded", "[Username and password here.....]", ParameterType.RequestBody)
Dim responseLogin As IRestResponse = client.Execute(requestLogin)
Dim request = New RestRequest("[data api path", Method.GET)
request.AddHeader("Accept", "application/json")
Dim response As IRestResponse = client.Execute(request)
You could probably just reuse the cookie container with different RestClient instances instead of reusing the client.

Answer 2

I had the same issue on RestClient .NET framework 4.5.2 version.
It turns out you have to implement the IAuthenticator interface.
public class MyAuth : IAuthenticator
{
readonly string _password;
readonly string _passwordKey;
readonly string _username;
readonly string _usernameKey;
public MyAuth(string usernameKey, string username, string passwordKey, string password)
{
_usernameKey = usernameKey;
_username = username;
_passwordKey = passwordKey;
_password = password;
}
public void Authenticate(IRestClient client, IRestRequest request)
=> request
.AddCookie(_usernameKey, _username)
.AddCookie(_passwordKey, _password);
//.AddParameter(_usernameKey, _username)
//.AddParameter(_passwordKey, _password);
}
I did this and my request worked.