/// <summary>
/// Takes an existing httpwebrequest and modifies it's headers according to
/// the authentication system used.
/// </summary>
/// <param name="request"></param>
/// <returns></returns>
public override void ApplyAuthenticationToRequest(HttpWebRequest request)
{
base.ApplyAuthenticationToRequest(request);
string oauthHeader = OAuthUtil.GenerateHeader(request.RequestUri,
this.ConsumerKey,
this.ConsumerSecret,
this.Token,
this.TokenSecret,
request.Method);
request.Headers.Add(oauthHeader);
}
/////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////
/// <summary>sets up the correct credentials for this call</summary>
//////////////////////////////////////////////////////////////////////
protected override void EnsureCredentials()
{
HttpWebRequest http = this.Request as HttpWebRequest;
if (string.IsNullOrEmpty(this.factory.ConsumerKey) || string.IsNullOrEmpty(this.factory.ConsumerSecret))
{
throw new GDataRequestException("ConsumerKey and ConsumerSecret must be provided to use GOAuthRequestFactory");
}
string oauthHeader = OAuthUtil.GenerateHeader(http.RequestUri,
this.factory.ConsumerKey,
this.factory.ConsumerSecret,
this.factory.Token,
this.factory.TokenSecret,
http.Method);
this.Request.Headers.Remove("Authorization"); // needed?
this.Request.Headers.Add(oauthHeader);
}
public static string GenerateHeader(Uri uri, String consumerKey, String consumerSecret, String token, String tokenSecret, String httpMethod)
{
OAuthUtil oauthUtil = new OAuthUtil();
string timeStamp = oauthUtil.GenerateTimeStamp();
string nonce = oauthUtil.GenerateNonce();
string signature = oauthUtil.GenerateSignature(uri, consumerKey, consumerSecret, token, tokenSecret,
httpMethod.ToUpper(), timeStamp, nonce);
StringBuilder sb = new StringBuilder();
sb.Append("Authorization: OAuth oauth_version=\"1.0\",");
sb.AppendFormat("oauth_nonce=\"{0}\",", EncodingPerRFC3986(nonce));
sb.AppendFormat("oauth_timestamp=\"{0}\",", EncodingPerRFC3986(timeStamp));
sb.AppendFormat("oauth_consumer_key=\"{0}\",", EncodingPerRFC3986(consumerKey));
if (!String.IsNullOrEmpty(token))
{
sb.AppendFormat("oauth_token=\"{0}\",", EncodingPerRFC3986(token));
}
sb.Append("oauth_signature_method=\"HMAC-SHA1\",");
sb.AppendFormat("oauth_signature=\"{0}\"", EncodingPerRFC3986(signature));
return(sb.ToString());
}
