private async Task SendResponse(ImageContext imageContext, string key, DateTimeOffset lastModified, byte[] buffer, int length)
{
imageContext.ComprehendRequestHeaders(lastModified, length);
string contentType = FormatHelpers.GetContentType(this.options.Configuration, key);
switch (imageContext.GetPreconditionState())
{
case ImageContext.PreconditionState.Unspecified:
case ImageContext.PreconditionState.ShouldProcess:
if (imageContext.IsHeadRequest())
{
await imageContext.SendStatusAsync(ResponseConstants.Status200Ok, contentType);
}
this.logger.LogImageServed(imageContext.GetDisplayUrl(), key);
if (buffer == null)
{
// We're pulling the buffer from the cache. This should be pooled.
CachedBuffer cachedBuffer = await this.cache.GetAsync(key);
await imageContext.SendAsync(contentType, cachedBuffer.Buffer, cachedBuffer.Length);
BufferDataPool.Return(cachedBuffer.Buffer);
}
else
{
await imageContext.SendAsync(contentType, buffer, length);
}
break;
case ImageContext.PreconditionState.NotModified:
this.logger.LogImageNotModified(imageContext.GetDisplayUrl());
await imageContext.SendStatusAsync(ResponseConstants.Status304NotModified, contentType);
break;
case ImageContext.PreconditionState.PreconditionFailed:
this.logger.LogImagePreconditionFailed(imageContext.GetDisplayUrl());
await imageContext.SendStatusAsync(ResponseConstants.Status412PreconditionFailed, contentType);
break;
default:
var exception = new NotImplementedException(imageContext.GetPreconditionState().ToString());
Debug.Fail(exception.ToString());
throw exception;
}
}
private async Task SendResponse(ImageContext imageContext, string key, DateTimeOffset lastModified, Stream stream)
{
imageContext.ComprehendRequestHeaders(lastModified, stream.Length);
string contentType = FormatHelpers.GetContentType(this.options.Configuration, key);
switch (imageContext.GetPreconditionState())
{
case ImageContext.PreconditionState.Unspecified:
case ImageContext.PreconditionState.ShouldProcess:
if (imageContext.IsHeadRequest())
{
await imageContext.SendStatusAsync(ResponseConstants.Status200Ok, contentType).ConfigureAwait(false);
}
this.logger.LogImageServed(imageContext.GetDisplayUrl(), key);
await imageContext.SendAsync(contentType, stream).ConfigureAwait(false);
break;
case ImageContext.PreconditionState.NotModified:
this.logger.LogImageNotModified(imageContext.GetDisplayUrl());
await imageContext.SendStatusAsync(ResponseConstants.Status304NotModified, contentType).ConfigureAwait(false);
break;
case ImageContext.PreconditionState.PreconditionFailed:
this.logger.LogImagePreconditionFailed(imageContext.GetDisplayUrl());
await imageContext.SendStatusAsync(ResponseConstants.Status412PreconditionFailed, contentType).ConfigureAwait(false);
break;
default:
var exception = new NotImplementedException(imageContext.GetPreconditionState().ToString());
Debug.Fail(exception.ToString());
throw exception;
}
}
