public async Task Execute(HttpContext httpContext, string genericContentName, string id)
{
if (httpContext == null)
{
throw new ArgumentNullException(nameof(httpContext));
}
if (!ContentTypes.IsValid(genericContentName))
{
_Logger.LogError($"Invalid generic content type - {id}.");
httpContext.Response.StatusCode = 400;
httpContext.Response.ContentLength = 0;
}
if (!_PublishingId.Validate(id))
{
_Logger.LogError($"Invalid content id - {id}.");
httpContext.Response.StatusCode = 400;
httpContext.Response.ContentLength = 0;
}
//This looked like a bug?
if (!httpContext.Request.Headers.TryGetValue("if-none-match", out var etagValue))
{
_Logger.LogError($"Required request header missing - if-none-match.");
httpContext.Response.ContentLength = 0;
httpContext.Response.StatusCode = 400; //TODO!
}
var content = await _DbContext.SafeGetContent(genericContentName, id);
if (content == null)
{
//TODO tell CDN to ignore hunting?
_Logger.LogError($"Content not found - {id}.");
httpContext.Response.StatusCode = 404;
httpContext.Response.ContentLength = 0;
return;
}
if (etagValue == content.PublishingId)
{
_Logger.LogWarning($"Matching etag found, responding with 304 - {id}.");
httpContext.Response.StatusCode = 304;
httpContext.Response.ContentLength = 0;
return;
}
//var accepts = httpContext.Request.Headers["accept"].ToHashSet();
//var signedResponse = content.SignedContentTypeName != null && accepts.Contains(content.SignedContentTypeName);
//if (!signedResponse && !accepts.Contains(content.ContentTypeName))
//{
// _Logger.LogWarning($"Cannot give acceptable response, responding with 406 - {id}.");
// httpContext.Response.StatusCode = 406;
// httpContext.Response.ContentLength = 0;
// return;
//}
httpContext.Response.Headers.Add("etag", content.PublishingId);
httpContext.Response.Headers.Add("last-modified", content.Release.ToUniversalTime().ToString("r"));
httpContext.Response.Headers.Add("content-type", content.ContentTypeName);
httpContext.Response.Headers.Add("cache-control", _HttpResponseHeaderConfig.ImmutableContentCacheControl);
httpContext.Response.StatusCode = 200;
httpContext.Response.ContentLength = content.Content?.Length ?? throw new InvalidOperationException("SignedContent empty.");
await httpContext.Response.Body.WriteAsync(content.Content);
}