public async Task <TokenResponse <AccessToken> > GetAccessTokenAsync(string accessTokenUrl, AuthToken authToken,
string grantType, IEnumerable <KeyValuePair <string, string> > parameters = null, HttpContent postValue = null)
{
Precondition.NotNull(accessTokenUrl, "accessTokenUrl");
Precondition.NotNull(authToken, "authToken");
Precondition.NotNull(grantType, "grantType");
Precondition.NotNull(_clientId, "clientId");
Precondition.NotNull(_clientSecret, "clientSecret");
var sendParameters = new List <KeyValuePair <string, string> >(8)
{
new KeyValuePair <string, string>(OAuthConstants.CODE, authToken.Code),
new KeyValuePair <string, string>(OAuthConstants.CLIENT_SECRET, _clientSecret),
new KeyValuePair <string, string>(OAuthConstants.REDIRECT_URI, _redirectUrl),
new KeyValuePair <string, string>(OAuthConstants.GRANT_TYPE, grantType),
new KeyValuePair <string, string>(OAuthConstants.SCOPE, _scope)
};
if (parameters == null)
{
parameters = Enumerable.Empty <KeyValuePair <string, string> >();
}
var handler = new OAuthMessageHandler(_clientId, _redirectUrl, parameters.Concat(sendParameters));
return(await GetTokenResponseAsync(accessTokenUrl, handler, postValue, (code, data) => new AccessToken(code, data)));
}
public async Task <TokenResponse <AccessToken> > GetAccessTokenAsync(string accessTokenUrl,
IEnumerable <KeyValuePair <string, string> > parameters = null, HttpContent postValue = null)
{
Precondition.NotNull(accessTokenUrl, "accessTokenUrl");
if (parameters == null)
{
parameters = Enumerable.Empty <KeyValuePair <string, string> >();
}
var handler = new OAuthMessageHandler(_clientId, _redirectUrl, parameters);
return(await GetTokenResponseAsync(accessTokenUrl, handler, postValue, (code, data) => new AccessToken(code, data)));
}
private async Task <TokenResponse <T> > GetTokenResponseAsync <T>(string url, OAuthMessageHandler handler,
HttpContent postValue, Func <string, ILookup <string, string>, T> tokenFactory) where T : Token
{
var client = new HttpClient(handler);
var response = await client.PostAsync(url,
postValue ?? new FormUrlEncodedContent(Enumerable.Empty <KeyValuePair <string, string> >()));
var tokenBase = await response.Content.ReadAsStringAsync();
if (response.StatusCode != System.Net.HttpStatusCode.OK)
{
throw new HttpRequestException(response.StatusCode + ":" + tokenBase); // error message
}
if (!tokenBase.Contains(OAuthConstants.ACCESS_TOKEN))
{
return(null);
}
return(tokenBase.IsJson() ? ExtractTokenAndExtraDataJson(OAuthConstants.ACCESS_TOKEN, tokenFactory, tokenBase) : ExtractTokenAndExtraData(OAuthConstants.ACCESS_TOKEN, tokenFactory, tokenBase));
}