public static void SaveSettings(this ISettingsService settingsService, TwitterCredentials credentials)
{
settingsService.Set(SettingsKey, credentials);
}
private static async Task<TwitterCredentials> GetUserCredentials(string consumerKey, string consumerSecret, string responseText)
{
var args = responseText.Substring(responseText.IndexOf("?") + 1)
.Split(new[] { "&" }, StringSplitOptions.RemoveEmptyEntries);
var verifier = "";
var token = "";
foreach (var a in args)
{
var index = a.IndexOf("=");
var key = a.Substring(0, index);
var value = a.Substring(index + 1);
if (key.Equals("oauth_token", StringComparison.OrdinalIgnoreCase))
token = value;
if (key.Equals("oauth_verifier", StringComparison.OrdinalIgnoreCase))
verifier = value;
}
var url = "https://api.twitter.com/oauth/access_token?oauth_verifier=" + verifier;
var oauthToken = token;
var oauthConsumerKey = consumerKey;
var rand = new Random();
var oauthNonce = rand.Next(1000000000).ToString();
var ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
var oauthTimestamp = Convert.ToInt64(ts.TotalSeconds).ToString();
var sd = new SortedDictionary<string, string>
{
{"oauth_version", OauthVersion},
{"oauth_consumer_key", oauthConsumerKey},
{"oauth_nonce", oauthNonce},
{"oauth_signature_method", OauthSignatureMethod},
{"oauth_timestamp", oauthTimestamp},
{"oauth_token", oauthToken}
};
var baseString = "GET&" + Uri.EscapeDataString(url) + "&";
foreach (var entry in sd)
{
baseString += Uri.EscapeDataString(entry.Key + "=" + entry.Value + "&");
}
//GS - Remove the trailing ambersand char, remember
//it's been urlEncoded so you have to remove the last 3 chars - %26
baseString = baseString.Substring(0, baseString.Length - 3);
var signingKey = Uri.EscapeDataString(consumerSecret) + "&";
var keyMaterial = CryptographicBuffer.ConvertStringToBinary(signingKey, BinaryStringEncoding.Utf8);
var hmacSha1Provider = MacAlgorithmProvider.OpenAlgorithm("HMAC_SHA1");
var macKey = hmacSha1Provider.CreateKey(keyMaterial);
var dataToBeSigned = CryptographicBuffer.ConvertStringToBinary(baseString, BinaryStringEncoding.Utf8);
var signatureBuffer = CryptographicEngine.Sign(macKey, dataToBeSigned);
var signatureString = CryptographicBuffer.EncodeToBase64String(signatureBuffer);
var hwr = WebRequest.Create(url);
var authorizationHeaderParams = string.Format(
"OAuth oauth_nonce=\"{0}\", oauth_signature_method=\"{1}\", oauth_timestamp=\"{2}\", oauth_consumer_key=\"{3}\", oauth_token=\"{4}\", oauth_signature=\"{5}\", oauth_version=\"{6}\"",
Uri.EscapeDataString(oauthNonce),
Uri.EscapeDataString(OauthSignatureMethod),
Uri.EscapeDataString(oauthTimestamp),
Uri.EscapeDataString(oauthConsumerKey),
Uri.EscapeDataString(oauthToken),
Uri.EscapeDataString(signatureString),
Uri.EscapeDataString(OauthVersion));
hwr.Headers["Authorization"] = authorizationHeaderParams;
var response = await hwr.GetResponseAsync();
var reader = new StreamReader(response.GetResponseStream());
var content = reader.ReadToEnd();
var credentials = new TwitterCredentials
{
ConsumerKey = consumerKey,
ConsumerSecret = consumerSecret
};
foreach (var a in content.Split(new[] { "&" }, StringSplitOptions.RemoveEmptyEntries))
{
var index = a.IndexOf("=");
var key = a.Substring(0, index);
var value = a.Substring(index + 1);
if (key.Equals("oauth_token", StringComparison.OrdinalIgnoreCase))
credentials.Token = value;
if (key.Equals("oauth_token_secret", StringComparison.OrdinalIgnoreCase))
credentials.TokenSecret = value;
}
credentials.Valid = true;
return credentials;
}
public static void StoreUserCredentials(this ISettingsService settingsService, TwitterCredentials credentials)
{
settingsService.Set(Credentials, credentials);
}
public UserSession(TwitterCredentials credentials)
{
_credentials = credentials;
}
// TODO: userstream support
public IUserSession GetUserSession(TwitterCredentials credentials)
{
return new UserSession(credentials);
}
