希望有一个高效的ASP.NET Web API控制器能够可靠地回到30〜50〜3MB JPEG文件 [英] Want an efficient ASP.NET Web API controller that can reliably return 30 to 50 ~3MB JPEGs

问题描述

我想更改以下code成一个高效的Web API控制器的方法，可以返回30〜50 JPEG文件（对于小于20个用户同时使用）平均3MB大小的

I'd like to change the following code into an efficient Web API controller method that can return 30 to 50 JPEGs (for <20 simultaneous users) of average 3MB size.

    public async Task<HttpResponseMessage> Get(int imageid) {
        return await Task.Run(() => {
            var dzImage = _dataContext.DeepZoomImages.SingleOrDefault(_ => _.ImageID == imageid);
            if (dzImage == default(DeepZoomImage)) {
                throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound));
            }
            var response = new HttpResponseMessage(HttpStatusCode.OK);
            var bitmap = GetFullSizeBitmap(dzImage);
            var memoryStream = new MemoryStream();
            bitmap.Save(memoryStream, ImageFormat.Jpeg);
            response.Content = new ByteArrayContent(memoryStream.ToArray());
            var fileName = string.Format("{0}.jpg", dzImage.ImageName);
            response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = fileName };
            response.Content.Headers.ContentType = new MediaTypeHeaderValue("image/jpeg");
            memoryStream.Flush();
            return response;
        });
    }

上述方法处理一个图像。我怎样才能最好的复数它来有效地处理多个图像的这种用法/负载的情况？是否有可能返回任务＆LT; Htt的presponseMessage＆GT; []或[任务和LT; Htt的presponseMessage []＆GT;

The foregoing method handles one image. How can I best pluralize it to handle multiple images efficiently for this usage/load scenario? Is it possible to return Task<HttpResponseMessage>[] or Task<HttpResponseMessage[]>?

或者倒不如产生的所有图像和一次性归还？

Or would it be better generate all images and return them in one go?

感谢您的帮助...

推荐答案

根据我们的讨论最好的方法这里将是在服务器上创建一个ZIP文件，然后下载一个文件给用户。作为一种替代方法，你可以试试这个多文件下载方法。

Based on our discussion the best approach here would be to create a ZIP file on the server and then download that one file to the user. As an alternative you could try this multi-file download approach.

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