Here is what I did to solve a similar issue - i am pulling the
username and password and such from constants but it can easily be
tied to your own text boxes. in my case we are authenticating to get a
calendar feed (which only needs the Auth token, not SID or LSID).
private string GetGoogleAuthentication()
{
string parameterString = "accountType=GOOGLE&Email=" +
GOOGLE_USERNAME + "&Passwd=" + GOOGLE_PASSWORD + "&source=" +
GOOGLE_SOURCE + "&service=" + GOOGLE_SERVICE;
WebRequest request = WebRequest.Create(GOOGLE_POSTURI);
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
byte[] parameters = Encoding.ASCII.GetBytes(parameterString);
Stream os = null;
try
{
request.ContentLength = parameters.Length; // count the
bytes
os = request.GetRequestStream();
os.Write(parameters, 0, parameters.Length); // send the
request
}
catch (WebException ex)
{
lblErrorMessage.Text = ("Error Authenticating To Google: "
+ ex.Message);
}
finally
{
if (os != null)
{
os.Close();
}
}
try
{
WebResponse response = request.GetResponse();
if (response == null)
{
return string.Empty;
}
StreamReader sr = new StreamReader
(response.GetResponseStream());
string AuthToken = sr.ReadToEnd().Trim();
return AuthToken.Substring(AuthToken.LastIndexOf("Auth=",
AuthToken.Length)).Replace("Auth=", ""); //should contain SID=xxx
LSID=xxx and Auth=xxx. we only need Auth.
}
catch (WebException ex)
{
lblErrorMessage.Text = ("Error Receiving Response From
Google: " + ex.Message);
}
return string.Empty;
}
FYI, according to google's documentation this is not recommended for
web applications (only client applications)
On Feb 12, 9:12 am, anirbanbose <[email protected]> wrote:
> I am creating an Asp.net web application. I decided to use google
> login for the app. But I want my app will have my own login page
> (instead of google login page). I will send the Userid and password to
> google and it will send the authentication token back. Is there any
> way to do that using Google Data API?
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