/// <summary>
/// Modifies the request to ensure that the authentication requirements are met.
/// </summary>
/// <param name="client">Client executing this request</param>
/// <param name="request">Request to authenticate</param>
/// <param name="credentials">The credentials used for the authentication</param>
/// <returns>The task the authentication is performed on</returns>
public Task PreAuthenticate(IRestClient client, IRestRequest request, ICredentials credentials)
{
var workflow = new OAuthWorkflow
{
ConsumerKey = ConsumerKey,
ConsumerSecret = ConsumerSecret,
ParameterHandling = ParameterHandling,
SignatureProvider = SignatureProvider,
SignatureTreatment = SignatureTreatment,
Verifier = Verifier,
Version = Version,
CallbackUrl = CallbackUrl,
SessionHandle = SessionHandle,
Token = Token,
TokenSecret = TokenSecret,
ClientUsername = ClientUsername,
ClientPassword = ClientPassword,
CreateTimestampFunc = CreateTimestampFunc ?? OAuthTools.GetTimestamp,
RandomNumberGenerator = RandomNumberGenerator ?? OAuthTools.DefaultRandomNumberGenerator,
};
AddOAuthData(client, request, workflow);
#if USE_TASKEX
return TaskEx.FromResult(0);
#else
return Task.FromResult(0);
#endif
}
private void AddOAuthData(IRestClient client, IRestRequest request, OAuthWorkflow workflow)
{
var url = client.BuildUri(request, false).ToString();
OAuthWebQueryInfo oauth;
var method = request.Method.ToString();
var parameters = new WebParameterCollection();
// include all GET and POST parameters before generating the signature
// according to the RFC 5849 - The OAuth 1.0 Protocol
// http://tools.ietf.org/html/rfc5849#section-3.4.1
// if this change causes trouble we need to introduce a flag indicating the specific OAuth implementation level,
// or implement a seperate class for each OAuth version
var useMultiPart = request.ContentCollectionMode == ContentCollectionMode.MultiPart
|| (request.ContentCollectionMode == ContentCollectionMode.MultiPartForFileParameters
&& (client.DefaultParameters.GetFileParameters().Any() || request.Parameters.GetFileParameters().Any()));
var requestParameters = client.MergeParameters(request).OtherParameters.AsEnumerable();
var effectiveMethod = client.GetEffectiveHttpMethod(request);
if (effectiveMethod == Method.GET)
{
requestParameters = requestParameters.Where(x => x.Type == ParameterType.GetOrPost || x.Type == ParameterType.QueryString);
foreach (var p in requestParameters)
{
parameters.Add(new WebParameter(p.Name, p.Value.ToString(), WebParameterType.Query));
}
}
else if (!useMultiPart && effectiveMethod == Method.POST)
{
foreach (var p in requestParameters.Where(x => x.Type == ParameterType.QueryString))
{
parameters.Add(new WebParameter(p.Name, p.Value.ToString(), WebParameterType.Query));
}
foreach (var p in requestParameters.Where(x => x.Type == ParameterType.GetOrPost))
{
parameters.Add(new WebParameter(p.Name, p.Value.ToString(), WebParameterType.Post));
}
}
else
{
// if we are sending a multipart request, only the "oauth_" parameters should be included in the signature
foreach (var p in requestParameters.Where(p => p.Name.StartsWith("oauth_", StringComparison.Ordinal)))
{
parameters.Add(new WebParameter(p.Name, p.Value.ToString(), WebParameterType.Internal));
}
}
switch (Type)
{
case OAuthType.RequestToken:
workflow.RequestTokenUrl = url;
oauth = workflow.BuildRequestTokenInfo(method, parameters);
break;
case OAuthType.AccessToken:
workflow.AccessTokenUrl = url;
oauth = workflow.BuildAccessTokenInfo(method, parameters);
break;
case OAuthType.ClientAuthentication:
workflow.AccessTokenUrl = url;
oauth = workflow.BuildClientAuthAccessTokenInfo(method, parameters);
break;
case OAuthType.ProtectedResource:
oauth = workflow.BuildProtectedResourceInfo(method, parameters, url);
break;
default:
throw new ArgumentOutOfRangeException();
}
switch (ParameterHandling)
{
case OAuthParameterHandling.HttpAuthorizationHeader:
parameters.Add("oauth_signature", oauth.Signature, WebParameterType.Internal);
request.AddHeader("Authorization", GetAuthorizationHeader(parameters));
break;
case OAuthParameterHandling.UrlOrPostParameters:
parameters.Add("oauth_signature", oauth.Signature, WebParameterType.Internal);
foreach (var parameter in parameters.Where(
parameter => !string.IsNullOrEmpty(parameter.Name)
&& (parameter.Name.StartsWith("oauth_") || parameter.Name.StartsWith("x_auth_"))))
{
var v = parameter.Value;
v = Uri.UnescapeDataString(v.Replace('+', ' '));
request.AddOrUpdateParameter(parameter.Name, v);
}
break;
default:
throw new ArgumentOutOfRangeException();
}
}
/// <summary>
/// Modifies the request to ensure that the authentication requirements are met.
/// </summary>
/// <param name="client">Client executing this request</param>
/// <param name="request">Request to authenticate</param>
/// <param name="credentials">The credentials used for the authentication</param>
/// <returns>The task the authentication is performed on</returns>
public Task PreAuthenticate(IRestClient client, IRestRequest request, ICredentials credentials)
{
return Task.Factory.StartNew(() =>
{
var workflow = new OAuthWorkflow
{
ConsumerKey = ConsumerKey,
ConsumerSecret = ConsumerSecret,
ParameterHandling = ParameterHandling,
SignatureProvider = SignatureProvider,
SignatureTreatment = SignatureTreatment,
Verifier = Verifier,
Version = Version,
CallbackUrl = CallbackUrl,
SessionHandle = SessionHandle,
Token = Token,
TokenSecret = TokenSecret,
ClientUsername = ClientUsername,
ClientPassword = ClientPassword,
CreateTimestampFunc = CreateTimestampFunc ?? OAuthTools.GetTimestamp
};
AddOAuthData(client, request, workflow);
});
}
