我尝试实现伪流，我有这样的html：
<video src="GetVideo.ashx?id=mp4" controls></video>
加载页面 Chrome 28.0.1500.72 m 后发送请求（甚至在点击播放之前）：
GET /GetVideo.ashx?id=mp4 HTTP/1.1
Host: localhost
Connection: keep-alive
Accept-Encoding: identity;q=1, *;q=0
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.72 Safari/537.36
Accept: */*
Referer: http://localhost/JWPlayerTestMp4Proper.aspx
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.6,en;q=0.4
Cookie: jwplayer.volume=12
Range: bytes=0-
服务器响应
HTTP/1.1 206 Partial Content
Cache-Control: private
Content-Length: 5186931
Content-Type: video/mp4
Content-Range: bytes 0-5186930/5186931
Accept-Ranges: bytes
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 22 Jul 2013 08:13:28 GMT
单击播放后文件开始播放，但问题是如果我尝试寻找尚未下载的部分，它不会发送对该部分的额外请求，它只是等到文件在指定位置下载。
当我在 Firefox 22.0 中执行相同操作时：第一个请求（页面加载后）：
GET http://localhost/GetVideo.ashx?id=mp4 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0
Accept: video/webm,video/ogg,video/*;q=0.9,application/ogg;q=0.7,audio/*;q=0.6,*/*;q=0.5
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3
Range: bytes=0-
Referer: http://localhost/JWPlayerTestMp4Proper.aspx
Connection: keep-alive
第一个响应（与 Chrome 相同）：
HTTP/1.1 206 Partial Content
Cache-Control: private
Content-Length: 5186931
Content-Type: video/mp4
Content-Range: bytes 0-5186930/5186931
Accept-Ranges: bytes
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 22 Jul 2013 08:28:19 GMT
第二个请求（在寻求尚未下载的部分之后）：
GET http://localhost/GetVideo.ashx?id=mp4 HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0
Accept: video/webm,video/ogg,video/*;q=0.9,application/ogg;q=0.7,audio/*;q=0.6,*/*;q=0.5
Accept-Language: ru-RU,ru;q=0.8,en-US;q=0.5,en;q=0.3
Range: bytes=2490368-
Referer: http://localhost/JWPlayerTestMp4Proper.aspx
Connection: keep-alive
第二个回应：
HTTP/1.1 206 Partial Content
Cache-Control: private
Content-Length: 2696563
Content-Type: video/mp4
Content-Range: bytes 2490368-5186930/5186931
Accept-Ranges: bytes
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Mon, 22 Jul 2013 08:35:34 GMT
IE 10 的工作方式与 Firefox 相同。
Chrome 期望什么样的响应标头能够以相同的方式运行 - 在寻求未下载的部分后发出附加请求？