/// <summary>
/// Performs Http Get request asynchronously
/// </summary>
/// <param name="path">relative URL of the object to get</param>
/// <param name="objectType">object type</param>
/// <param name="objectToRefresh">object to refresh</param>
/// <returns>A task object for the async HTTP get</returns>
internal async Task <object> GetAsync(string path, Type objectType, object objectToRefresh)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException(nameof(path));
}
if (_cacheManager != null && objectToRefresh == null)
{
var cachedObject = await GetObjectFromCacheAsync(path);
if (cachedObject != null)
{
return(cachedObject);
}
}
var handler = new HttpClientHandler
{
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
};
using (var client = new HttpClient(handler))
{
var objectApiResponse = objectToRefresh as ApiResponse;
if (objectApiResponse != null && path == objectApiResponse.Path &&
objectApiResponse.LastModifiedUtc != DateTime.MinValue)
{
client.DefaultRequestHeaders.IfModifiedSince = objectApiResponse.LastModifiedUtc;
}
string uri;
if (path.EndsWith(".json"))
{
uri = path;
}
else
{
uri = "https://" + Region.Host + path;
}
var responseMessage = await client.GetAsync(uri);
if (responseMessage.StatusCode == HttpStatusCode.NotModified)
{
return(objectToRefresh);
}
else if (responseMessage.IsSuccessStatusCode)
{
object obj;
if (typeof(ApiResponse).IsAssignableFrom(objectType))
{
obj = await DeserializeResponse(path, objectType, responseMessage);
}
else
{
obj = await responseMessage.Content.ReadAsByteArrayAsync();
}
if (_cacheManager != null)
{
try
{
await _cacheManager.AddDataAsync(Region.Name
+ "/" + Locale + "/" + path, obj);
}
catch (CacheManagerException)
{
// if we failed to add item to cache, swallow and return normally
}
}
return(obj);
}
else
{
ApiError apiError = null;
try
{
apiError = (ApiError) await DeserializeResponse(path, typeof(ApiError), responseMessage);
}
catch (JsonException)
{
// Failed to deserialize error
apiError = null;
}
throw new ApiException(apiError, responseMessage.StatusCode, null);
}
}
}