SharePoint 2010 / IIS 7.5 字节范围请求响应整个文件

Question

我在让 SharePoint 2010/IIS 7.5 尊重字节范围请求时遇到问题。我正在使用 Silverlight 开发 SharePoint 2010 Web 部件，并尝试检索存储在 SharePoint 中的部分文档。

当我在 SharePoint 中请求文件的字节范围时，服务器会使用整个文件进行响应。但是，如果我从 Apache 服务器上的文件请求相同的字节范围，一切都会按预期工作。以下是使用 Fiddler 观察到的 http 标头。

任何帮助将非常感激！谢谢。

发送：

GET http://example.com/file.abc HTTP/1.1
Accept: */*
Accept-Language: en-US
Referer: http://example.com/index.html
Accept-Encoding: identity
Range: bytes=1061285-1064594
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.127 Safari/533.4
Host: example.com
Connection: Keep-Alive

SharePoint 还获取登录凭据：

Authorization: Negotiate TlRMTVNTUAABAAAAl4II4gAAAAAAAAAAAAAAAAAAAAAGAbAdAAAADw==

从 Apache 接收：

HTTP/1.1 206 Partial Content
Date: Wed, 25 Aug 2010 22:40:34 GMT
Server: Apache/2.0.54
Last-Modified: Fri, 20 Aug 2010 23:27:18 GMT
ETag: "b68e346-103ea9-a3c20180"
Accept-Ranges: bytes
Content-Length: 3310
Vary: User-Agent
Content-Range: bytes 1061285-1064594/1064617
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Content-Type: application/x-zip

从 SharePoint 2010 / IIS 7.5 接收

HTTP/1.1 200 OK
Cache-Control: private,max-age=0
Content-Length: 1064617
Content-Type: application/octet-stream
Expires: Tue, 10 Aug 2010 22:40:56 GMT
Last-Modified: Wed, 25 Aug 2010 19:28:39 GMT
ETag: "{5A1DF927-D8CD-4BC0-9590-8188CF777A3D},1"
Server: Microsoft-IIS/7.5
SPRequestGuid: 99799011-5bdc-489f-99fd-d060a56d3ae4
Set-Cookie: WSS_KeepSessionAuthenticated={7703be10-bb56-4fa1-ba8b-cd05f482859f}; path=/
X-SharePointHealthScore: 5
ResourceTag: rt:5A1DF927-D8CD-4BC0-9590-8188CF777A3D@00000000001
X-Content-Type-Options: nosniff
Content-Disposition: attachment; filename=file.abc
X-Download-Options: noopen
Public-Extension: http://schemas.microsoft.com/repl-2
Set-Cookie: WSS_KeepSessionAuthenticated={7703be10-bb56-4fa1-ba8b-cd05f482859f}; path=/
Persistent-Auth: true
X-Powered-By: ASP.NET
MicrosoftSharePointTeamServices: 14.0.0.4762
Date: Wed, 25 Aug 2010 22:40:56 GMT

Answer 1

问题在于 SharePoint 缓存默认处于关闭状态，需要打开才能启用字节范围请求。请参阅二进制大型对象的基于磁盘的缓存。

Answer 2

注意 http://www.w3.org/Protocols/rfc2616 /rfc2616-sec14.html#sec14.35.2：

“服务器可以忽略 Range 标头。”

因此，每当您使用 Range 标头时，您都必须能够处理 200 响应。不幸的是，您的服务器似乎不支持范围服务，但这是符合要求的。