private async Task <dynamic> ImageRequest(dynamic parameters, CancellationToken token)
{
try
{
var filename = parameters.id;
var identifier = string.Format("ark:/{0}/{1}", parameters.naan, parameters.id);
(var maxWidth, var maxHeight, var maxArea) = GetSizeConstraints(Conf);
var requestId = Context.GetOwinEnvironment()["RequestId"] as string;
var request = ImageRequestValidator.Validate(
parameters.region,
parameters.size,
parameters.rotation,
parameters.quality,
parameters.format,
requestId,
maxWidth,
maxHeight,
maxArea,
Conf.SupportedFormats());
Log.Debug("{@Request}", request);
var imageUri = new Uri(new Uri(Conf.Location), filename);
var allowSizeAboveFull = Conf.AllowSizeAboveFull;
var processor = new ImageProcessing.ImageProcessing {
HttpClient = HttpClient, Log = Log
};
Stream ms = await processor.ProcessImage(imageUri, request, Conf.ImageQuality, allowSizeAboveFull, Conf.PdfMetadata);
ImageFormat f = request.Format;
string mimetype = f.GetAttribute <ImageFormatMetadataAttribute>().MimeType;
return(new StreamResponse(() => ms, mimetype)
.WithHeader("Link", string.Format("<{0}>;rel=\"profile\"", new ImageInfo().Profile.First()))
#if !DEBUG
.AsAttachment(string.Format("{0}.{1}", (string)parameters.id, (string)parameters.format)));
#else
;
#endif
}
catch (FileNotFoundException e)
{
Log.Error("Unable to load source image @{FileName}", e.FileName);
return(HttpStatusCode.NotFound);
}
catch (NotImplementedException e)
{
Log.Information(e, "Un-implemented feature requested");
return(Response.AsJson(e.Message, HttpStatusCode.BadRequest));
}
catch (ArgumentException e)
{
Log.Error(e, "Error parsing argument");
return(Response.AsJson(e.Message, HttpStatusCode.BadRequest));
}
catch (FormatException e)
{
Log.Error(e, "Error parsing argument");
return(Response.AsJson(e.Message, HttpStatusCode.BadRequest));
}
catch (Exception e)
{
Log.Error(e, "Unexpected exception");
return(HttpStatusCode.InternalServerError);
}
}
