/// <summary>
/// Generic API request for generic objects
/// </summary>
/// <typeparam name="T">Object type to return</typeparam>
/// <param name="uri">FRC API endpoint</param>
/// <param name="useIfModifiedSince">boolean for whether or not to use the If-Modified-Since header</param>
/// <returns></returns>
private T handleAPIRequest <T>(string uri, bool useIfModifiedSince = true)
{
T apiObj;
try
{
if (!System.IO.File.Exists(HelperDataStructures.convertUriToFileName(uri, ".bin")))
{
//if there isn't a cached file, we need to force an API update to create one.
useIfModifiedSince = false;
}
string api_response = sendAndGetRawResponse(uri, useIfModifiedSince);
if (api_response != null)
{
apiObj = JsonConvert.DeserializeObject <T>(api_response);
HelperDataStructures.WriteObjectToFile <T>(HelperDataStructures.convertUriToFileName(uri, ".bin"), apiObj);
return(apiObj);
}
else
{
return(default(T));
}
}
catch (WebException ex)
{
if (((HttpWebResponse)((WebException)ex.InnerException).Response).StatusCode == HttpStatusCode.NotModified)
{
//no changes were made, so load from cache
try
{
apiObj = HelperDataStructures.ReadObjectFromFile <T>(HelperDataStructures.convertUriToFileName(uri, ".bin"));
return(apiObj);
}
catch (System.IO.FileNotFoundException fnfe)
{
throw new Exception("No cached object found.", fnfe);
}
}
else
{
throw ex;
}
}
}
