/// <summary>
/// Saves test data
/// </summary>
/// <param name="data">Session data</param>
/// <param name="sessionId">Session id (needed if data stores in database)</param>
/// <param name="saveToCookie">'True' to make data stored in cookie</param>
private void SetTestData(TestData data, int sessionId = 0, bool saveToCookie = false)
{
string dataString = XmlManager.SerializeObjectUTF8(data);
string tokenString;
string testInfoString;
if (saveToCookie)
{
testInfoString = HttpUtility.UrlEncode(dataString);
tokenString = MD5HashManager.GenerateKey(testInfoString);
}
else
{
tokenString = MD5HashManager.GenerateKey(dataString);
testInfoString = TestSessionManager.Write(dataString, sessionId).ToString(CultureInfo.InvariantCulture);
}
var testInfo = new HttpCookie("TestInfo", testInfoString);
var securityToken = new HttpCookie("SecurityToken", tokenString);
Response.Cookies.Add(testInfo);
Response.Cookies.Add(securityToken);
TempData["testInfo"] = testInfo;
TempData["securityToken"] = securityToken;
}
/// <summary>
/// Returns test data
/// </summary>
/// <param name="databaseRecordId">Returns ID for records are storing in Data Base</param>
/// <param name="getFromCookie">'True' to get data from cookie rather then database</param>
/// <returns></returns>
private TestData GetTestData(out int databaseRecordId, bool getFromCookie = false)
{
var testInfoCookie = (HttpCookie)TempData["TestInfo"];
var securityTokenCookie = (HttpCookie)TempData["SecurityToken"];
databaseRecordId = 0;
if (testInfoCookie == null || securityTokenCookie == null || string.IsNullOrWhiteSpace(testInfoCookie.Value) || string.IsNullOrWhiteSpace(securityTokenCookie.Value))
{
testInfoCookie = Request.Cookies["TestInfo"];
securityTokenCookie = Request.Cookies["SecurityToken"];
if (testInfoCookie == null || securityTokenCookie == null ||
string.IsNullOrWhiteSpace(testInfoCookie.Value) ||
string.IsNullOrWhiteSpace(securityTokenCookie.Value))
{
return(null);
}
}
else
{
Response.Cookies.Add(testInfoCookie);
Response.Cookies.Add(securityTokenCookie);
}
string data = testInfoCookie.Value;
string securityToken = securityTokenCookie.Value;
if (getFromCookie)
{
data = HttpUtility.UrlDecode(data);
}
else
{
var id = 0;
try
{
id = int.Parse(testInfoCookie.Value);
}
catch (Exception)
{
return(null);
}
databaseRecordId = id;
data = TestSessionManager.Read(id);
}
if (MD5HashManager.GenerateKey(data) != securityToken)
{
return(null);
}
return(XmlManager.DeserializeObject <TestData>(data));
}
/// <summary>
/// Returns question hash
/// </summary>
/// <returns></returns>
public string GetQuestionHash()
{
return(MD5HashManager.GenerateKey(CurrentQuestionId + TestSeed));
}