public InterceptMode InterceptOnce()
{
string etag = _response.ETag;
if (string.IsNullOrEmpty(etag))
{
return(InterceptMode.DoingNothing);
}
if (etag.StartsWith("\"", StringComparison.Ordinal) &&
etag.EndsWith("\"", StringComparison.Ordinal))
{
_compressedETag = etag.Substring(0, etag.Length - 1) + "^" + _encoding.Name + "\"";
}
else
{
_compressedETag = "\"" + etag + "^" + _encoding.Name + "\"";
}
HttpStatusCode statusCode = (HttpStatusCode)_response.StatusCode;
if (statusCode == HttpStatusCode.NotModified)
{
return(InterceptMode.SentFromStorage);
}
var key = new CompressedKey
{
ETag = _compressedETag,
RequestPath = _request.Path.Value,
RequestQueryString = _request.QueryString.Value,
RequestMethod = _request.Method,
};
_compressedItem = _storage.Open(key);
if (_compressedItem != null)
{
return(InterceptMode.SentFromStorage);
}
_compressedItemBuilder = _storage.Create(key);
_compressingStream = _encoding.CompressTo(_compressedItemBuilder.Stream);
return(InterceptMode.CompressingToStorage);
}
