Esempio n. 1
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        /// <summary>
        ///   Acquire an access token, from the given URI, using the given
        ///   HTTP method.
        /// </summary>
        ///
        /// <remarks>
        ///   <para>
        ///     To use this method, you must first set the oauth_token to the value
        ///     of the request token.  Eg, oauth["token"] = "whatever".
        ///   </para>
        ///   <para>
        ///     According to the OAuth spec, you need to do this only ONCE per
        ///     application.  In other words, the first time the application
        ///     is run.  The normal oauth workflow is:  (1) get a request token,
        ///     (2) use that to acquire an access token (which requires explicit
        ///     user approval), then (3) using that access token, invoke
        ///     protected services.  The first two steps need to be done only
        ///     once per application.
        ///   </para>
        ///   <para>
        ///     For Twitter, at least, you can cache the access tokens
        ///     indefinitely; Twitter says they never expire.  However, other
        ///     oauth services may not do the same. Also: the user may at any
        ///     time revoke his authorization for your app, in which case you
        ///     need to perform the first 2 steps again.
        ///   </para>
        /// </remarks>
        ///
        /// <seealso cref='AcquireRequestToken'>
        ///
        /// </example>
        /// <returns>
        ///   a response object that contains the entire text of the response,
        ///   as well as extracted parameters. This method presumes the
        ///   response is query-param encoded. In other words,
        ///   poauth_token=foo&something_else=bar.
        /// </returns>
        public OAuthResponse AcquireAccessToken(string uri, string method, string pin)
        {
            NewRequest();
            _params["verifier"] = pin;

            var authzHeader = GetAuthorizationHeader(uri, method);

            // prepare the token request
            var request = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(uri);

            request.Headers.Add("Authorization", authzHeader);
            request.Method = method;

            using (var response = (System.Net.HttpWebResponse)request.GetResponse())
            {
                using (var reader = new System.IO.StreamReader(response.GetResponseStream()))
                {
                    var r = new OAuthResponse(reader.ReadToEnd());
                    this["token"]        = r["oauth_token"];
                    this["token_secret"] = r["oauth_token_secret"];
                    return(r);
                }
            }
        }