private async Task <string> RefreshAsync()
{
string responseJson;
DateTime tokenCreateTimeUtc;
using (var requestMessage = new HttpRequestMessage(HttpMethod.Post, tokenUri))
{
requestMessage.Content = new FormUrlEncodedContent(new Dictionary <string, string>
{
["type"] = "refresh",
["refresh_token"] = refreshToken,
["client_id"] = oauthOptions.ClientId,
["redirect_uri"] = oauthOptions.RedirectUrl,
["client_secret"] = oauthOptions.ClientSecret,
});
requestMessage.Headers.UserAgent.TryParseAdd(userAgent);
using (var httpClient = httpClientPool.Create())
using (var responseMessage = await httpClient.SendAsync(requestMessage))
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage);
tokenCreateTimeUtc = DateTime.UtcNow;
responseJson = await responseMessage.Content.ReadAsStringAsync();
}
}
var tokenResponse = JsonConvert.DeserializeObject <TokenResponse>(responseJson);
this.accessToken = tokenResponse.AccessToken;
this.estimatedAccessTokenExpirationUtc = ParseExpiresIn(tokenResponse.ExpiresIn, tokenCreateTimeUtc);
return(accessToken);
}
private async Task <IPageCollection <T> > GetPageCollectionAsync <T>(Uri uri, string accessToken, CancellationToken cancellationToken)
{
IResponseMessageCacheEntry responseMessageCacheEntry = null;
if (responseMessageCache != null)
{
responseMessageCacheEntry = await responseMessageCache.GetAsync(uri);
}
await rateLimiter.WaitIfNecessaryAsync();
string responseJson;
Uri nextUri;
using (var requestMessage = CreateRequest(HttpMethod.Get, uri, accessToken: accessToken, responseMessageCacheEntry: responseMessageCacheEntry))
using (var httpClient = httpClientPool.Create())
using (var responseMessage = await httpClient.SendAsync(requestMessage, cancellationToken))
{
var localResponseMessage = responseMessage;
if (responseMessage.StatusCode == System.Net.HttpStatusCode.NotModified && responseMessageCacheEntry != null)
{
localResponseMessage = responseMessageCacheEntry.ToResponseMessage();
}
else
{
await HttpResponseUtils.EnsureSuccessAsync(responseMessage);
}
responseJson = await localResponseMessage.Content.ReadAsStringAsync();
nextUri = HttpResponseUtils.ParseNextUriOrNull(localResponseMessage);
if (responseMessageCacheEntry == null)
{
await CacheResponseMessageAsync(uri, localResponseMessage, responseJson);
}
}
var elements = JsonConvert.DeserializeObject <IReadOnlyCollection <T> >(responseJson);
return(new PageCollection <T>(elements, nextUri, this));
}