private async Task HandleAssetAsync(HttpContext context, IAsset asset, WebOptimizerOptions options)
{
IAssetResponse response = await _assetBuilder.BuildAsync(asset, context, options);
if (response == null)
{
await _next(context);
return;
}
await WriteOutputAsync(context, asset, response, response.CacheKey, options);
}
private async Task WriteOutputAsync(HttpContext context, IAsset asset, IAssetResponse cachedResponse, string cacheKey, WebOptimizerOptions options)
{
context.Response.ContentType = asset.ContentType;
foreach (string name in cachedResponse.Headers.Keys)
{
context.Response.Headers[name] = cachedResponse.Headers[name];
}
if (!string.IsNullOrEmpty(cacheKey))
{
if (options.EnableCaching == true)
{
context.Response.Headers[HeaderNames.CacheControl] = $"max-age=31536000"; // 1 year
}
context.Response.Headers[HeaderNames.ETag] = $"\"{cacheKey}\"";
if (IsConditionalGet(context, cacheKey))
{
context.Response.StatusCode = 304;
return;
}
}
if (cachedResponse?.Body?.Length > 0)
{
await context.Response.Body.WriteAsync(cachedResponse.Body, 0, cachedResponse.Body.Length);
}
}