public async Task <CodeAuthRequest> GetAccessTokenAsync(int clientId, string clientSecret, string redirectUri, string code)
{
var sb = new StringBuilder($"https://oauth.vk.com/access_token?client_id={clientId}");
var uri = string.IsNullOrWhiteSpace(redirectUri) ? "https://oauth.vk.com/blank.html" : redirectUri;
sb.Append($"&client_secret={clientSecret}");
sb.Append($"&redirect_uri={uri}");
sb.Append($"&code={code}");
using (var client = new HttpClient())
{
var response = await(await client.GetAsync(sb.ToString()).ConfigureAwait(false))
.Content.ReadAsStringAsync().ConfigureAwait(false);
var parsedResponse = JObject.Parse(response);
if (parsedResponse["error"] != null)
{
return(new CodeAuthRequest
{
Error = CitrinaJsonConverter.Deserialize <CodeAuthError>(response),
IsError = true
});
}
var token = CitrinaJsonConverter.Deserialize <CodeAuthResponse>(response);
return(new CodeAuthRequest
{
AccessToken = new UserAccessToken(token.AccessToken, token.ExpiresIn, token.UserId, clientId)
});
}
}
public static async Task <UploadRequest <T> > UploadAsync <T>(string url, IEnumerable <string> files, string contentFieldName, bool incrementalFieldName = false)
{
var uploadingFiles = await GetFilesContentAsync(files).ConfigureAwait(false);
if (uploadingFiles == null)
{
return(new UploadRequest <T>
{
IsError = true,
Error = "No content found."
});
}
using (var client = new HttpClient())
{
using (var content = new MultipartFormDataContent("---------------CitrinaBoundary"))
{
for (int i = 0; i < uploadingFiles.Length; i++)
{
var fileContent = new ByteArrayContent(uploadingFiles[i].Content);
fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("file")
{
FileName = uploadingFiles[i].Name,
Name = incrementalFieldName ? $"{contentFieldName}{i + 1}" : $"{contentFieldName}"
};
content.Add(fileContent);
}
using (var response = await client.PostAsync(url, content).ConfigureAwait(false))
{
#if (!NET45)
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
#endif
var data = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
try
{
return(new UploadRequest <T>
{
Response = CitrinaJsonConverter.Deserialize <T>(data)
});
}
catch (Exception e)
{
return(new UploadRequest <T>
{
IsError = true,
Error = $"Error occured while uploading files: Type={e.GetType()}, Message={e.Message}"
});
}
}
}
}
}
public T GetEventObject <T>(CallbackEvent e)
where T : ICallbackModel
{
try
{
//TODO: Need serialization
return(CitrinaJsonConverter.Deserialize <T>(/*e.Object*/ null));
}
catch
{
return(default(T));
}
}
private static void ObtainDeserializedResponse <TResponse>(InternalApiRequest <TResponse> request, string response)
{
if (string.IsNullOrWhiteSpace(response))
{
request.Error = new ApiError(EmptyResponseErrorText);
}
var parsedResponse = JObject.Parse(response);
JToken errorToken, responseToken;
if ((errorToken = parsedResponse["error"]) != null)
{
var error = (ErrorResponse)CitrinaJsonConverter.Deserialize(errorToken.ToString(), typeof(ErrorResponse));
request.Error = new ApiError(error.Code, error.Message, error.RequestParameters?.ToDictionary(k => k.Key, v => v.Value));
}
else if ((responseToken = parsedResponse["response"]) != null)
{
request.Response = (TResponse)CitrinaJsonConverter.Deserialize(responseToken.ToString(), typeof(TResponse));
}
}