public static async Task <bool> LoginAsync(string data)
{
string authenticationURL = "https://ivle.nus.edu.sg/api/Lapi.svc/Login_JSON";
HttpClient client = new HttpClient();
// encode the request content in url encoding format
HttpContent payload = new StringContent(data, Encoding.UTF8, "application/x-www-form-urlencoded");
HttpResponseMessage response = client.PostAsync(authenticationURL, payload).Result;
// wait for the string response
string responseString = await response.Content.ReadAsStringAsync();
// remove the last "}"
responseString = responseString.Remove(responseString.Length - 1);
// remove the first "{" and its associated header
responseString = responseString.Substring(responseString.IndexOf(":") + 1);
// store the newly received token
_token = JsonConvert.DeserializeObject <DataStructure.Token>(responseString);
payload.Dispose();
response.Dispose();
client.Dispose();
return(_token != null && _token.TokenSuccess);
}
public static void RemoveToken()
{
_token = null;
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
roamingSettings.Values[DataStructure.ConstName.Token] = null;
}
public static void RemoveToken()
{
_token = null;
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
roamingSettings.Values[DataStructure.ConstName.Token] = null;
}
// to check if token has been stored in application data
// if so, restore the token from stored data, else, return false
public static bool IsTokenExisting()
{
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
if (roamingSettings.Values.ContainsKey(DataStructure.ConstName.Token))
{
// load token from application data
_token = new DataStructure.Token(roamingSettings.Values[DataStructure.ConstName.Token].ToString());
return(true);
}
else
{
return(false);
}
}
// to check if token has been stored in application data
// if so, restore the token from stored data, else, return false
public static bool IsTokenExisting()
{
Windows.Storage.ApplicationDataContainer roamingSettings = Windows.Storage.ApplicationData.Current.RoamingSettings;
if (roamingSettings.Values.ContainsKey(DataStructure.ConstName.Token))
{
// load token from application data
_token = new DataStructure.Token(roamingSettings.Values[DataStructure.ConstName.Token].ToString());
return true;
}
else
{
return false;
}
}
// asynchronous function to validate token, to
// update token if necessary or to return false
// if token is invalid
public static async Task <bool> IsTokenValid()
{
HttpClient client = new HttpClient();
// http get request to validate token
HttpResponseMessage response = await client.GetAsync(Utils.LAPI.GenerateValidateURL());
// make sure the http reponse is successful
response.EnsureSuccessStatusCode();
// convert http response to string
string responseString = await response.Content.ReadAsStringAsync();
_token = JsonConvert.DeserializeObject <DataStructure.Token>(responseString);
response.Dispose();
client.Dispose();
return(_token != null && _token.TokenSuccess);
}
// asynchronous function to validate token, to
// update token if necessary or to return false
// if token is invalid
public static async Task<bool> IsTokenValid()
{
HttpClient client = new HttpClient();
// http get request to validate token
HttpResponseMessage response = await client.GetAsync(Utils.LAPI.GenerateValidateURL());
// make sure the http reponse is successful
response.EnsureSuccessStatusCode();
// convert http response to string
string responseString = await response.Content.ReadAsStringAsync();
_token = JsonConvert.DeserializeObject<DataStructure.Token>(responseString);
response.Dispose();
client.Dispose();
return (_token != null && _token.TokenSuccess);
}
public static async Task<bool> LoginAsync(string data)
{
string authenticationURL = "https://ivle.nus.edu.sg/api/Lapi.svc/Login_JSON";
HttpClient client = new HttpClient();
// encode the request content in url encoding format
HttpContent payload = new StringContent(data, Encoding.UTF8, "application/x-www-form-urlencoded");
HttpResponseMessage response = client.PostAsync(authenticationURL, payload).Result;
// wait for the string response
string responseString = await response.Content.ReadAsStringAsync();
// remove the last "}"
responseString = responseString.Remove(responseString.Length - 1);
// remove the first "{" and its associated header
responseString = responseString.Substring(responseString.IndexOf(":") + 1);
// store the newly received token
_token = JsonConvert.DeserializeObject<DataStructure.Token>(responseString);
payload.Dispose();
response.Dispose();
client.Dispose();
return (_token != null && _token.TokenSuccess);
}
