Hello everyone,
I am having hard time with google api I am using .net.I want to Insert
update delete shared contacts in my web application but I am getting error
unauthorized however if i change url I am getting response.
below is my code.
HttpWebResponse response = null;
string sessionUrl =
"https://www.google.com/m8/feeds/contacts/default/full";;
Uri uri = new Uri(sessionUrl);
HttpWebRequest request = WebRequest.Create(uri) as HttpWebRequest;
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Java/1.5.0_06";
request.Host = "www.google.com";
request.Accept = "text/html, image/gif, image/jpeg, *; q=.2, */*;
q=.2";
request.KeepAlive = true;
request.Method = "GET";
string header =
formAuthorizationHeader(Session["newtoken"].ToString(), null, uri, "GET");
request.Headers.Add(header);
response = request.GetResponse() as HttpWebResponse;
above code is working fine but if i change the URL
by https://www.google.com/m8/feeds/contacts/mydomain.com/full I am getting
error.
Please help me I just want to insert,update,delete shared contacts not
personal contact.
I am also attaching the code for retrieving contacts.
Thanks
Foram
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?using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.Security.Cryptography;
using System.Globalization;
using System.Text;
using System.Collections.Generic;
using Google.GData.Client;
public partial class Default4 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
String token = Request.QueryString["token"];
Session["token"] = token;
HttpWebResponse response = null;
string authSubToken = "";
string sessionUrl = getSessionTokenUrl("https", "www.google.com");
Uri uri = new Uri(sessionUrl);
HttpWebRequest request = WebRequest.Create(uri) as HttpWebRequest;
Session["header"] = formAuthorizationHeader(Session["token"].ToString(), null, uri, "GET");
request.Headers.Add(Session["header"].ToString());
response = request.GetResponse() as HttpWebResponse;
if (response != null)
{
int code = (int)response.StatusCode;
if (code != 200)
{
}
// get the body and parse it
authSubToken = Utilities.ParseValueFormStream(response.GetResponseStream(), GoogleAuthentication.AuthSubToken);
}
Session["newtoken"]= authSubToken;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
HttpWebResponse response = null;
string sessionUrl = "https://www.google.com/m8/feeds/contacts/default/full";;
Uri uri = new Uri(sessionUrl);
HttpWebRequest request = WebRequest.Create(uri) as HttpWebRequest;
request.ContentType = "application/x-www-form-urlencoded";
request.UserAgent = "Java/1.5.0_06";
request.Host = "www.google.com";
request.Accept = "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2";
request.KeepAlive = true;
request.Method = "GET";
string header = formAuthorizationHeader(Session["newtoken"].ToString(), null, uri, "GET");
request.Headers.Add(header);
//request.Headers.Add(Session["header"].ToString());
response = request.GetResponse() as HttpWebResponse;
}
public static string getSessionTokenUrl(string protocol, string domain)
{
return protocol + "://" + domain + "/accounts/AuthSubSessionToken";
}
public static string formAuthorizationHeader(string token, AsymmetricAlgorithm key, Uri requestUri, string requestMethod)
{
if (key == null)
{
return String.Format(CultureInfo.InvariantCulture, "Authorization: AuthSub token=\"{0}\"", token);
}
else
{
if (requestUri == null)
{
throw new ArgumentNullException("requestUri");
}
// Form signature for secure mode
TimeSpan t = (DateTime.UtcNow - new DateTime(1970, 1, 1));
int timestamp = (int)t.TotalSeconds;
string nounce = generateULONGRnd();
string dataToSign = String.Format(CultureInfo.InvariantCulture,
"{0} {1} {2} {3}",
requestMethod,
requestUri.AbsoluteUri,
timestamp.ToString(CultureInfo.InvariantCulture),
nounce);
byte[] signature = sign(dataToSign, key);
string encodedSignature = Convert.ToBase64String(signature);
string algorithmName = key is DSACryptoServiceProvider ? "dsa-sha1" : "rsa-sha1";
return String.Format(CultureInfo.InvariantCulture,
"Authorization: AuthSub token=\"{0}\" data=\"{1}\" sig=\"{2}\" sigalg=\"{3}\"",
token, dataToSign, encodedSignature, algorithmName);
}
}
private static string generateULONGRnd()
{
byte[] randomNumber = new byte[20];
// Create a new instance of the RNGCryptoServiceProvider.
RNGCryptoServiceProvider Gen = new RNGCryptoServiceProvider();
// Fill the array with a random value.
Gen.GetBytes(randomNumber);
StringBuilder x = new StringBuilder(20);
for (int i = 0; i < 20; i++)
{
if (randomNumber[i] == 0 && x.Length == 0)
{
continue;
}
x.Append(Convert.ToInt16(randomNumber[i], CultureInfo.InvariantCulture).ToString()[0]);
}
return x.ToString();
}
//////////////////////////////////////////////////////////////////////
private static byte[] sign(string dataToSign, AsymmetricAlgorithm key)
{
byte[] data = new ASCIIEncoding().GetBytes(dataToSign);
try
{
RSACryptoServiceProvider providerRSA = key as RSACryptoServiceProvider;
if (providerRSA != null)
{
return providerRSA.SignData(data, new SHA1CryptoServiceProvider());
}
DSACryptoServiceProvider providerDSA = key as DSACryptoServiceProvider;
if (providerDSA != null)
{
return providerDSA.SignData(data);
}
}
catch (CryptographicException e)
{
// Tracing.TraceMsg(e.Message);
}
return null;
}
}
