ImageResizer不是通过调整服务的WebAPI图像 [英] ImageResizer is not resizing images served by WebAPI

问题描述

我想获得 ImageResizer 来调整这是由供应的WebAPI的图像。我ImageResizer在文件安装。 /resizer.debug.ashx表示没有问题。当我尝试调整静止图像，它工作正常。

I am trying to get ImageResizer to resize images which are served by WebAPI. I have ImageResizer installed as in documentation. /resizer.debug.ashx shows no issues. When I try to resize static image, it works fine.

我试着用这些参数调整：

I tried resizing with these parameters:

    /api/files/image/image.jpg?width=100
    /api/files/image/image.jpg?width=100&process=always
    /api/files/image/image.jpg?width=100&format=jpg

我的WebAPI动作看起来是这样的：

My WebAPI action looks like this:

    [HttpGet]
    public HttpResponseMessage Image(string name)
    {
        var filePath = GetFilePath();

        var response = new HttpResponseMessage(HttpStatusCode.OK);
        response.Content = new StreamContent(new FileStream(filePath, FileMode.Open, FileAccess.Read));
        response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("inline");
        response.Content.Headers.ContentDisposition.FileName = fileData.OriginalFileName;
        response.Content.Headers.ContentLength = fileData.ContentLength;
        response.Content.Headers.ContentType = new MediaTypeHeaderValue(fileData.MediaType);

        return response;
    }

有没有办法使用ImageResizer用的WebAPI的方式？

Is there a way to use ImageResizer with WebAPI?

推荐答案

的WebAPI，MVC和HttpHandlers的都有一个共同点 - 可怕的文件服务性能。应用程序框架，在设计上，不调整为大文件处理。

WebAPI, MVC, and HTTPHandlers all have one thing in common - terrible file serving performance. Application frameworks, by design, aren't tuned for large file handling.

此外，由于ASP.NET和IIS管道的限制，你不能有效地高速缓存和当通过一个HttpHandler / MVC /的​​WebAPI在ExecuteRequest阶段正在生产的文件提供图片。

Also, due to ASP.NET and IIS pipeline limitations, you can't efficiently cache and serve images when the file is being produced by an HttpHandler/MVC/WebAPI during the ExecuteRequest phase.

请阅读 ImageResizer最佳实践指南了解详情。

如果您需要提供源图像，可以实现IVirtualImageProvider或使用所提供的插件来访问您选择的数据存储。

If you need to provide source images, you can implement IVirtualImageProvider or use one of the provided plugins to access your data store of choice.

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