private string GenerateSignature(HttpWebRequest request, FormParameters formParameters)
{
FormParameters parameters = FormParameters.OAuthDecode(request.RequestUri.Query);
foreach (var item in _protocolParameters)
{
parameters.Add(item);
}
if (request.ContentType == "application/x-www-form-urlencoded")
{
foreach (var item in formParameters)
{
parameters.Add(item);
}
}
parameters.Sort();
string signature = GenerateBaseSignature(request.Method, request.RequestUri, parameters);
string secret = EncodeSecret();
Trace.WriteLine("Secret: " + secret);
Trace.WriteLine("Signature: " + signature);
return(Sign(secret, signature));
}
private void SetTempToken()
{
FormParameters form = new FormParameters();
if (TempTokenRequesting != null)
{
TempTokenRequesting(this, new OAuthRequestTokenEventArgs(form));
}
//_protocolParameters.Set("oauth_callback", CallbackUrl);
form.Add("oauth_callback", CallbackUrl);
// TODO: check TempTokenMethod
HttpWebResponse response = AuthorizedPOST(TemporaryCredentialsUri, form);
using (var sr = new StreamReader(response.GetResponseStream()))
{
string text = sr.ReadToEnd();
FormParameters reply = FormParameters.OAuthDecode(text);
AuthorizedToken = reply["oauth_token"];
AuthorizedTokenSecret = reply["oauth_token_secret"];
// TODO pass additional parameters to impl
}
}
public OAuthClientBase(string consumerKey, string sharedSecret, string callbackUrl, string authorizedToken, string authorizedTokenSecret)
{
ConsumerKey = consumerKey;
SharedSecret = sharedSecret;
CallbackUrl = callbackUrl;
AuthorizedToken = authorizedToken;
AuthorizedTokenSecret = authorizedTokenSecret;
_protocolParameters = new FormParameters();
}
private HttpWebResponse ResendRequest(HttpWebRequest request, byte[] data)
{
if (request.Method == "GET")
{
return(AuthorizedGET(request.RequestUri));
}
if (request.Method == "POST" && request.ContentType == "application/x-www-form-urlencoded")
{
FormParameters form = FormParameters.FormDecode(Encoding.UTF8.GetString(data));
return(AuthorizedPOST(request.RequestUri, form));
}
throw new NotImplementedException();
}
public void Verify(string verifier)
{
_protocolParameters.Set("oauth_verifier", verifier);
// TODO: check AccessTokenMethod
HttpWebResponse response = AuthorizedPOST(AccessTokenUri);
using (var sr = new StreamReader(response.GetResponseStream()))
{
var text = sr.ReadToEnd();
FormParameters reply = FormParameters.OAuthDecode(text);
AuthorizedToken = reply["oauth_token"];
AuthorizedTokenSecret = reply["oauth_token_secret"];
// TODO pass additional parameters to impl
}
}
private static string GenerateBaseSignature(string method, Uri uri, FormParameters sortedParameters)
{
StringBuilder sb = new StringBuilder();
sb.Append(Encode(method.ToUpper()));
sb.Append('&');
sb.Append(Encode(uri.Scheme.ToLower()));
sb.Append(Encode("://"));
sb.Append(Encode(uri.Host.ToLower()));
if (!uri.IsDefaultPort)
{
sb.Append(uri.Port);
}
sb.Append(Encode(uri.AbsolutePath));
sb.Append('&');
sb.Append(sortedParameters.SignatureEncode());
return(sb.ToString());
}
public static FormParameters FormDecode(string message)
{
FormParameters form = new FormParameters();
if (String.IsNullOrWhiteSpace(message))
{
return(form);
}
foreach (var pair in message.Split('&'))
{
string[] parts = pair.Split('=');
string key = HttpUtility.UrlDecode(parts[0], Encoding.UTF8);
string value = parts.Length > 1
? HttpUtility.UrlDecode(parts[1], Encoding.UTF8)
: String.Empty;
form.Add(key, value);
}
return(form);
}
public static FormParameters OAuthDecode(string message)
{
FormParameters form = new FormParameters();
message = message.TrimStart('?');
if (String.IsNullOrWhiteSpace(message))
{
return(form);
}
foreach (var pair in message.Split('&'))
{
string[] parts = pair.Split('=');
string key = OAuthClientBase.Decode(parts[0]);
string value = parts.Length > 1
? OAuthClientBase.Decode(parts[1])
: String.Empty;
form.Add(key, value);
}
return(form);
}
protected void Authorize(HttpWebRequest request, FormParameters parameters = null)
{
if (parameters == null)
{
parameters = new FormParameters();
}
_protocolParameters.Set("oauth_consumer_key", ConsumerKey);
_protocolParameters.Set("oauth_token", AuthorizedToken);
_protocolParameters.Set("oauth_signature_method", SignatureMethod);
_protocolParameters.Set("oauth_timestamp", GenerateTimestamp());
_protocolParameters.Set("oauth_nonce", GenerateNonce());
_protocolParameters.Set("oauth_version", "1.0");
_protocolParameters.Set("oauth_signature", GenerateSignature(request, parameters));
string auth = _protocolParameters.HeaderEncode();
Trace.WriteLine("Authorization: " + auth);
request.Headers["Authorization"] = auth;
}
protected HttpWebResponse AuthorizedPOST(Uri uri, FormParameters parameters = null)
{
Trace.WriteLine("POST " + uri);
if (parameters == null)
{
parameters = new FormParameters();
}
HttpWebRequest request = WebRequest.Create(uri) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
Authorize(request, parameters);
string data = parameters.FormEncode();
Trace.WriteLine("POST payload: " + data);
return(GetResponse(request, Encoding.UTF8.GetBytes(data)));
}
public OAuthRequestTokenEventArgs(FormParameters form)
{
Parameters = form;
}
