Asp.net web api 在WebAPI中使用PushStreamContent时，如何满足多字节范围？

我需要使用

PushStreamContent

，因为我的数据源（实际上必须连接blob），但我还必须支持多字节范围的请求（与存储的blob不对齐的任意范围）。我不清楚的是，我是否可以使用

PushStreamContent

生成

multipart/byteranges

响应，如果每个范围需要在响应中分开，如果是，如何做，以及它与

PushStreamContent

调用的分块传输编码的关系。

您可以使用

MultipartContent

这样做：

public class MyRangeController : ApiController
{
    [HttpGet]
    public HttpResponseMessage Get()
    {
        // Create a multi-part content object for the response; note that per RFC spec, subtype must be "byteranges"
        // Note that the content type of the over-all response will be "multipart/byteranges"
        // We choose to use a GUID string for the separator; it could be anything suitable.
        var multipartContent = new MultipartContent("byteranges", Guid.NewGuid().ToString("D"));

        // Create the response object and set its content
        var response = new HttpResponseMessage(HttpStatusCode.PartialContent) { Content = multipartContent };

        foreach (var rangeItemHeaderValue in Request.Headers.Range.Ranges)
        {
            // Create  PushStreamContent object for our current byte range...
            var pushStreamContent = new PushStreamContent((stream1, content, arg3) =>
            {
                // Write to stream1

                stream1.Close();
            });

            // We need to add certain headers to each part of the response
            pushStreamContent.Headers.ContentRange = new ContentRangeHeaderValue(rangeItemHeaderValue.From.Value, rangeItemHeaderValue.To.Value, /* total size of the resource */);
            pushStreamContent.Headers.ContentType = new MediaTypeHeaderValue(/* Set a content type for each part of the response */);

            // Add the part to the multi-part content response
            multipartContent.Add(pushStreamContent);
        }

        return response;
    }
}