osu/osu.Game/Online/API/APIAccess.cs

332 lines
10 KiB
C#

//Copyright (c) 2007-2016 ppy Pty Ltd <contact@ppy.sh>.
//Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net;
using System.Threading;
using osu.Framework;
using osu.Framework.Configuration;
using osu.Framework.Logging;
using osu.Framework.Threading;
using osu.Game.Online.API.Requests;
namespace osu.Game.Online.API
{
public class APIAccess : IUpdateable
{
private OAuth authentication;
public string Endpoint = @"https://new.ppy.sh";
const string ClientId = @"5";
const string ClientSecret = @"FGc9GAtyHzeQDshWP5Ah7dega8hJACAJpQtw6OXk";
ConcurrentQueue<APIRequest> queue = new ConcurrentQueue<APIRequest>();
public Scheduler Scheduler = new Scheduler();
public string Username;
//private SecurePassword password;
public string Password;
public Bindable<User> LocalUser = new Bindable<User>();
public string Token
{
get { return authentication.Token?.ToString(); }
set
{
if (string.IsNullOrEmpty(value))
authentication.Token = null;
else
authentication.Token = OAuthToken.Parse(value);
}
}
protected bool HasLogin => Token != null || (!string.IsNullOrEmpty(Username) && !string.IsNullOrEmpty(Password));
private Thread thread;
Logger log;
public APIAccess()
{
authentication = new OAuth(ClientId, ClientSecret, Endpoint);
log = Logger.GetLogger(LoggingTarget.Network);
thread = new Thread(run) { IsBackground = true };
thread.Start();
}
private List<IOnlineComponent> components = new List<IOnlineComponent>();
public void Register(IOnlineComponent component)
{
Scheduler.Add(delegate
{
components.Add(component);
component.APIStateChanged(this, state);
});
}
public void Unregister(IOnlineComponent component)
{
Scheduler.Add(delegate
{
components.Remove(component);
});
}
public string AccessToken => authentication.RequestAccessToken();
/// <summary>
/// Number of consecutive requests which failed due to network issues.
/// </summary>
int failureCount = 0;
private void run()
{
while (true)
{
switch (State)
{
case APIState.Failing:
//todo: replace this with a ping request.
log.Add($@"In a failing state, waiting a bit before we try again...");
Thread.Sleep(5000);
if (queue.Count == 0)
{
log.Add($@"Queueing a ping request");
Queue(new ListChannelsRequest() { Timeout = 5000 });
}
break;
case APIState.Offline:
//work to restore a connection...
if (!HasLogin)
{
//OsuGame.Scheduler.Add(() => { OsuGame.ShowLogin(); });
State = APIState.Offline;
Thread.Sleep(500);
continue;
}
if (State < APIState.Connecting)
State = APIState.Connecting;
if (!authentication.HasValidAccessToken && !authentication.AuthenticateWithLogin(Username, Password))
{
//todo: this fails even on network-related issues. we should probably handle those differently.
//NotificationManager.ShowMessage("Login failed!");
log.Add(@"Login failed!");
ClearCredentials();
continue;
}
var userReq = new GetUserRequest();
userReq.Success += (u) => {
LocalUser.Value = u;
};
if (!handleRequest(userReq))
{
State = APIState.Failing;
continue;
}
//we're connected!
State = APIState.Online;
failureCount = 0;
break;
}
//hard bail if we can't get a valid access token.
if (authentication.RequestAccessToken() == null)
{
State = APIState.Offline;
continue;
}
//process the request queue.
APIRequest req;
while (queue.TryPeek(out req))
{
if (handleRequest(req))
{
//we have succeeded, so let's unqueue.
queue.TryDequeue(out req);
}
}
Thread.Sleep(1);
}
}
private void ClearCredentials()
{
Username = null;
Password = null;
}
public void Login(string username, string password)
{
Debug.Assert(State == APIState.Offline);
Username = username;
Password = password;
State = APIState.Connecting;
}
/// <summary>
/// Handle a single API request.
/// </summary>
/// <param name="req">The request.</param>
/// <returns>true if we should remove this request from the queue.</returns>
private bool handleRequest(APIRequest req)
{
try
{
Logger.Log($@"Performing request {req}", LoggingTarget.Network);
req.Perform(this);
State = APIState.Online;
failureCount = 0;
return true;
}
catch (WebException we)
{
HttpStatusCode statusCode = (we.Response as HttpWebResponse)?.StatusCode ?? HttpStatusCode.RequestTimeout;
switch (statusCode)
{
case HttpStatusCode.Unauthorized:
State = APIState.Offline;
return true;
case HttpStatusCode.RequestTimeout:
failureCount++;
log.Add($@"API failure count is now {failureCount}");
if (failureCount < 3)
//we might try again at an api level.
return false;
State = APIState.Failing;
return true;
}
req.Fail(we);
return true;
}
catch (Exception e)
{
if (e is TimeoutException)
log.Add(@"API level timeout exception was hit");
req.Fail(e);
return true;
}
}
private APIState state;
public APIState State
{
get { return state; }
set
{
APIState oldState = state;
APIState newState = value;
state = value;
switch (state)
{
case APIState.Failing:
case APIState.Offline:
flushQueue();
break;
}
if (oldState != newState)
{
//OsuGame.Scheduler.Add(delegate
{
//NotificationManager.ShowMessage($@"We just went {newState}!", newState == APIState.Online ? Color4.YellowGreen : Color4.OrangeRed, 5000);
log.Add($@"We just went {newState}!");
Scheduler.Add(delegate
{
components.ForEach(c => c.APIStateChanged(this, newState));
OnStateChange?.Invoke(oldState, newState);
});
}
}
}
}
public void Queue(APIRequest request)
{
queue.Enqueue(request);
}
public event StateChangeDelegate OnStateChange;
public delegate void StateChangeDelegate(APIState oldState, APIState newState);
private void flushQueue(bool failOldRequests = true)
{
var oldQueue = queue;
//flush the queue.
queue = new ConcurrentQueue<APIRequest>();
if (failOldRequests)
{
APIRequest req;
while (queue.TryDequeue(out req))
req.Fail(new Exception(@"Disconnected from server"));
}
}
public void Logout()
{
ClearCredentials();
authentication.Clear();
State = APIState.Offline;
}
public void Update()
{
Scheduler.Update();
}
}
public enum APIState
{
/// <summary>
/// We cannot login (not enough credentials).
/// </summary>
Offline,
/// <summary>
/// We are having connectivity issues.
/// </summary>
Failing,
/// <summary>
/// We are in the process of (re-)connecting.
/// </summary>
Connecting,
/// <summary>
/// We are online.
/// </summary>
Online
}
}