private OfflineEntry GetCacheEntry(Uri uri, Guid requestId)
{
var filteredQueryParameters = uri.ParseQueryString()
.Where(p => p.Key != "_")
// Sanitize empty values (query string wo value)
.Select(p => p.Key + (p.Value != null ? "=" : string.Empty) + (string.IsNullOrEmpty(p.Value) ? string.Empty : p.Value));
var mappedUri = new UriBuilder(uri);
mappedUri.Query = string.Join("&", filteredQueryParameters);
// TODO: review if trimming trailing slash is correct
var flatString = mappedUri.Uri.ToString().TrimEnd('/');
OfflineEntry entry = null;
lock (cacheIndex)
{
if (!cacheIndex.TryGetValue(flatString, out entry))
{
entry = new OfflineEntry { RequestId = requestId, Key = flatString };
}
}
return entry;
}
private static async Task<HttpResponseMessage> RetrieveOfflineResponseMessageAsync(HttpRequestMessage request, OfflineEntry entry, StorageFile file)
{
var cachedByteArray = await ReadBytesAsync(file);
var response = new HttpResponseMessage(HttpStatusCode.OK);
response.RequestMessage = request;
response.Content = new ByteArrayContent(cachedByteArray);
MediaTypeHeaderValue contentType;
if (MediaTypeHeaderValue.TryParse(entry.ContentType, out contentType))
{
response.Content.Headers.ContentType = contentType;
}
return response;
}