/// <summary>
/// Resets this instance state and allows for a new authentication process to start.
/// </summary>
/// <returns><c>true</c> if a new guest session identification string retrieved; otherwise, <c>false</c>.</returns>
public virtual async Task <bool> Reset()
{
// Lock this instance
await LockObject.WaitAsync().ConfigureAwait(false);
try
{
ResetStates();
return(await GetGuestSession().ConfigureAwait(false));
}
finally
{
// Unlock this instance
LockObject.Release();
}
}
/// <summary>
/// Downloads the captcha image associated with the latest login attempt.
/// </summary>
/// <returns>An array of bytes representing an image in PNG file format</returns>
public virtual async Task <byte[]> DownloadCaptchaImage()
{
if (CachedCaptchaImage != null)
{
return(CachedCaptchaImage);
}
if (string.IsNullOrWhiteSpace(CaptchaGID))
{
return(null);
}
// Lock this instance
await LockObject.WaitAsync().ConfigureAwait(false);
CachedCaptchaImage = null;
try
{
CachedCaptchaImage = (await OperationRetryHelper.Default.RetryOperationAsync(
() => SteamWebAccess.FetchBinary(
new SteamWebAccessRequest(
LoginCaptchaUrl,
SteamWebAccessRequestMethod.Get,
new QueryStringBuilder
{
{ "gid", CaptchaGID }
}
))
).ConfigureAwait(false)).ToArray();
return(CachedCaptchaImage);
}
finally
{
// Unlock this instance
LockObject.Release();
}
}
/// <summary>
/// Tries to authenticate a user with the provided user credentials and returns session data corresponding to a
/// successful login; fails if information provided is not enough or service is unavailable.
/// </summary>
/// <param name="credentials">The credentials to be used for login process.</param>
/// <returns>Logged in session to be used with other classes</returns>
/// <exception cref="ArgumentException">
/// Username and/or password is missing. - credentials
/// or
/// Two factor authentication code is required for login process to continue. - credentials
/// or
/// Email verification code is required for login process to continue. - credentials
/// or
/// Captcha is required for login process to continue. - credentials
/// </exception>
/// <exception cref="UserLoginException">
/// Raises when there is a problem with login process or there is a need for more information. Capture and decide if
/// you should repeat the process.
/// </exception>
public virtual async Task <WebSession> DoLogin(LoginCredentials credentials)
{
if (string.IsNullOrWhiteSpace(credentials.UserName) || string.IsNullOrWhiteSpace(credentials.Password))
{
throw new ArgumentException("Username and/or password is missing.", nameof(credentials));
}
if (RequiresTwoFactorAuthenticationCode &&
string.IsNullOrWhiteSpace(credentials.TwoFactorAuthenticationCode))
{
throw new ArgumentException("Two factor authentication code is required for login process to continue.",
nameof(credentials));
}
if (RequiresEmailVerification && string.IsNullOrWhiteSpace(credentials.EmailVerificationCode))
{
throw new ArgumentException("Email verification code is required for login process to continue.",
nameof(credentials));
}
if (RequiresCaptchaCode && string.IsNullOrWhiteSpace(credentials.CaptchaCode))
{
throw new ArgumentException("Captcha is required for login process to continue.", nameof(credentials));
}
// Lock this instance
await LockObject.WaitAsync().ConfigureAwait(false);
try
{
// Retrieve guest cookies for login process if missing
if (string.IsNullOrEmpty(SteamWebAccess?.Session?.SessionId))
{
await GetGuestSession().ConfigureAwait(false);
}
var loginRequest = await ConstructLoginRequest(credentials).ConfigureAwait(false);
var loginResponse = loginRequest != null
? await OperationRetryHelper.Default
.RetryOperationAsync(() => SteamWebAccess.FetchString(loginRequest)).ConfigureAwait(false)
: null;
if (loginResponse == null)
{
throw new UserLoginException(UserLoginErrorCode.GeneralFailure, this);
}
if (!await ProcessLoginResponse(loginResponse).ConfigureAwait(false))
{
throw new UserLoginException(UserLoginErrorCode.BadCredentials, this);
}
var sessionData = SteamWebAccess.Session;
ResetStates();
return(sessionData);
}
finally
{
// Unlock this instance
LockObject.Release();
}
}
