/// <summary>
/// Called when a profile requests user authorization
/// </summary>
/// <param name="authenticating_instance">Authenticating instance</param>
/// <param name="e"><see cref="RequestAuthorization"/> event arguments</param>
public void OnRequestAuthorization(Instance authenticating_instance, RequestAuthorizationEventArgs e)
{
RequestAuthorization?.Invoke(authenticating_instance, e);
}
/// <summary>
/// Gets instance profile list available to the user
/// </summary>
/// <param name="authenticating_instance">Authenticating instance (can be same as this instance)</param>
/// <param name="ct">The token to monitor for cancellation requests</param>
/// <returns>Profile list</returns>
public ObservableCollection <Profile> GetProfileList(Instance authenticating_instance, CancellationToken ct = default(CancellationToken))
{
lock (_profile_list_lock)
{
if (_profile_list == null)
{
// Get API endpoints.
var api = GetEndpoints(ct);
var e = new RequestAuthorizationEventArgs("config");
retry:
// Request authentication token.
OnRequestAuthorization(authenticating_instance, e);
if (e.AccessToken == null)
{
throw new AccessTokenNullException();
}
try
{
// Get and load profile list.
var profile_list = new ObservableCollection <Profile>();
profile_list.LoadJSONAPIResponse(Xml.Response.Get(
uri: api.ProfileList,
token: e.AccessToken,
ct: ct).Value, "profile_list", ct);
foreach (var profile in profile_list)
{
// Bind profile to our instance.
profile.Instance = this;
// Attach to RequestAuthorization profile events.
profile.RequestAuthorization += (object sender_profile, RequestAuthorizationEventArgs e_profile) => OnRequestAuthorization(authenticating_instance, e_profile);
}
// If we got here, save the profile list.
_profile_list = profile_list;
}
catch (OperationCanceledException) { throw; }
catch (WebException ex)
{
if (ex.Response is HttpWebResponse response && response.StatusCode == HttpStatusCode.Unauthorized)
{
// Access token was rejected (401 Unauthorized).
if (e.TokenOrigin == RequestAuthorizationEventArgs.TokenOriginType.Saved)
{
// Access token loaded from the settings was rejected.
// This might happen when ill-clocked client thinks the token is still valid, but the server expired it already.
// Retry with forced access token refresh.
e.ForceRefresh = true;
}
else
{
// Retry with forced authorization, ignoring saved access token completely.
e.SourcePolicy = RequestAuthorizationEventArgs.SourcePolicyType.ForceAuthorization;
}
goto retry;
}
else
{
throw new AggregateException(Resources.Strings.ErrorProfileListLoad, ex);
}
}
/// <summary>
/// Gets server profile list available to the user
/// </summary>
/// <param name="authenticatingServer">Authenticating server (can be same as this server)</param>
/// <param name="ct">The token to monitor for cancellation requests</param>
/// <returns>Profile list</returns>
public ObservableCollection <Profile> GetProfileList(Server authenticatingServer, CancellationToken ct = default)
{
lock (ProfilesLock)
{
if (Profiles != null)
{
return(Profiles);
}
// Get API endpoints.
var api = GetEndpoints(ct);
var e = new RequestAuthorizationEventArgs("config");
retry:
// Request authentication token.
OnRequestAuthorization(authenticatingServer, e);
try
{
// Parse JSON string and get inner key/value dictionary.
Trace.TraceInformation("Loading info {0}", api.Info);
var obj = eduJSON.Parser.GetValue <Dictionary <string, object> >(
(Dictionary <string, object>)eduJSON.Parser.Parse(Xml.Response.Get(
uri: api.Info,
token: e.AccessToken,
ct: ct).Value, ct),
"info");
// Load collection.
if (!eduJSON.Parser.GetValue(obj, "profile_list", out List <object> obj2))
{
throw new eduJSON.InvalidParameterTypeException(nameof(obj2), typeof(Dictionary <string, object>), obj.GetType());
}
// Parse all items listed. Don't do it in parallel to preserve the sort order.
var profileList = new ObservableCollection <Profile>();
foreach (var el in obj2)
{
var profile = new Profile(this);
profile.Load(el);
// Attach to RequestAuthorization profile events.
profile.RequestAuthorization += (object sender_profile, RequestAuthorizationEventArgs e_profile) => OnRequestAuthorization(authenticatingServer, e_profile);
profileList.Add(profile);
}
return(Profiles = profileList);
}
catch (OperationCanceledException) { throw; }
catch (WebException ex)
{
if (ex.Response is HttpWebResponse response && response.StatusCode == HttpStatusCode.Unauthorized)
{
// Access token was rejected (401 Unauthorized).
if (e.TokenOrigin == RequestAuthorizationEventArgs.TokenOriginType.Saved)
{
// Access token loaded from the settings was rejected.
// This might happen when ill-clocked client thinks the token is still valid, but the server expired it already.
// Or the token was revoked on the server side.
// Retry with forced access token refresh.
e.SourcePolicy = RequestAuthorizationEventArgs.SourcePolicyType.ForceAuthorization;
goto retry;
}
}
if (ex is WebExceptionEx exEx && ex.Response.ContentType == "application/json")
{
var obj = (Dictionary <string, object>)eduJSON.Parser.Parse(exEx.ResponseText, ct);
throw new AggregateException(Resources.Strings.ErrorProfileListLoad + "\n" + eduJSON.Parser.GetValue <string>(obj, "error"), ex);
}
throw new AggregateException(Resources.Strings.ErrorProfileListLoad, ex);
}
catch (Exception ex) { throw new AggregateException(Resources.Strings.ErrorProfileListLoad, ex); }
}
}
