public AbstractCommand(string action, TRequest request, TResponse response)
{
this.Id = RequestId.Get();
this.Token = RequestToken.Get();
this.Tries = 1u;
this.Action = action;
this.RequestArgs = request;
this.ResponseResult = response;
this.onSuccessCallback = null;
this.onFailureCallback = null;
this.Time = 0u;
}
internal static async Task <Result> GetToken(
string clientId,
string clientSecret,
string state,
string redirectUri,
string htmlResponseToShowInBrowser)
{
// Creates an HttpListener to listen for requests on that redirect URI.
var http = new HttpListener();
http.Prefixes.Add(redirectUri);
Debug("Listening on " + redirectUri);
http.Start();
// Creates the OAuth 2.0 authorization request.
RequestIdentity.Request(clientId, state, redirectUri);
// Waits for the OAuth authorization response.
var context = await http.GetContextAsync();
// Brings the Console to Focus.
ConsoleHack.BringConsoleToFront();
// Sends an HTTP response to the browser.
var response = context.Response;
var buffer = System.Text.Encoding.UTF8.GetBytes(htmlResponseToShowInBrowser);
response.ContentLength64 = buffer.Length;
var responseOutput = response.OutputStream;
Task responseTask = responseOutput.WriteAsync(
buffer, 0, buffer.Length).ContinueWith((task) =>
{
responseOutput.Close();
http.Stop();
Debug("HTTP server stopped.");
});
// Checks for errors.
if (context.Request.QueryString.Get("error") != null)
{
return(new Result()
{
Token = null,
Error = string.Format("OAuth authorization error: {0}.",
context.Request.QueryString.Get("error"))
});
}
if (context.Request.QueryString.Get("code") == null ||
context.Request.QueryString.Get("state") == null)
{
return(new Result()
{
Token = null,
Error = "Malformed authorization response. " + context.Request.QueryString
});
}
// extracts the code
var code = context.Request.QueryString.Get("code");
var incoming_state = context.Request.QueryString.Get("state");
// Compares the receieved state to the expected value, to ensure that
// this app made the request which resulted in authorization.
if (incoming_state != state)
{
return(new Result()
{
Token = null,
Error = string.Format(
"Received request with invalid state ({0})", incoming_state)
});
}
Debug("Authorization code: " + code);
return(new Result()
{
Token = await RequestToken.Get(clientId, clientSecret, code, redirectUri, state),
Error = null
});
}