http - 示例 http 范围请求 session

Question

是否可以向我展示一个包含范围请求的示例 http session 。我的意思是请求和响应 header 是什么？

Answer 1

以下交换是在 Chrome 和静态网络服务器之间进行的，用于检索 MP4 视频。

初始请求 - 视频。请注意 Accept-Ranges 响应 header 以指示服务器具有范围 header 支持:

GET /BigBuckBunny_320x180.mp4
        Cache-Control: max-age=0
        Connection: keep-alive
        Accept-Language: en-GB,en-US,en
        Host: localhost:8080
        Range:
        Accept: text/html,application/xhtml+xml,application/xml,*/*
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 ...
        Accept-Encoding: gzip,deflate,sdch
        Accept-Charset: ISO-8859-1,utf-8,*
200 OK
        Content-Type: video/mp4
        Connection: keep-alive
        Last-Modified: Wed,14 Dec 2011 15:50:59 GMT
        ETag: A023EF02BD589BC472A2D6774EAE3C58
        Transfer-Encoding:
        Content-Length: 64657027
        Accept-Ranges: bytes
        Server: Brisket/1.0.1
        Date: Wed,14 Dec 2011 16:11:24 GMT

检测到先前响应中的范围 header - 后续请求具有开放式范围以确认支持。响应返回 206 状态和 Content-Range header 以指示响应正文中存在的字节:

GET /BigBuckBunny_320x180.mp4
        Connection: keep-alive
        Accept-Language: en-GB,en-US,en
        Host: localhost:8080
        Range: bytes=0-
        Accept: */*
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 ...
        Referer: http://localhost:8080/BigBuckBunny_320x180.mp4
        Accept-Encoding: identity
        Accept-Charset: ISO-8859-1,utf-8,*
206 Partial Content
        Content-Type: video/mp4
        Connection: keep-alive
        Last-Modified: Wed,14 Dec 2011 15:50:59 GMT
        ETag: A023EF02BD589BC472A2D6774EAE3C58
        Transfer-Encoding:
        Content-Length: 64657027
        Accept-Ranges: bytes
        Server: Brisket/1.0.1
        Date: Wed,14 Dec 2011 16:11:25 GMT
        Content-Range: bytes 0-64657026/64657027

捕获文件末尾的后续范围请求(可能捕获尾随元数据):

GET /BigBuckBunny_320x180.mp4
        Connection: keep-alive
        Accept-Language: en-GB,en-US,en
        Host: localhost:8080
        Range: bytes=64312833-64657026
        Accept: */*
        If-Range: A023EF02BD589BC472A2D6774EAE3C58
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 ...
        Referer: http://localhost:8080/BigBuckBunny_320x180.mp4
        Accept-Encoding: identity
        Accept-Charset: ISO-8859-1,utf-8,*
206 Partial Content
        Content-Type: video/mp4
        Connection: keep-alive
        Last-Modified: Wed,14 Dec 2011 15:50:59 GMT
        ETag: A023EF02BD589BC472A2D6774EAE3C58
        Transfer-Encoding:
        Content-Length: 344194
        Accept-Ranges: bytes
        Server: Brisket/1.0.1
        Date: Wed,14 Dec 2011 16:11:25 GMT
        Content-Range: bytes 64312833-64657026/64657027

用户点击超出下载范围的视频进度条 - 发出范围请求以从所选位置开始播放:

GET /BigBuckBunny_320x180.mp4
        Connection: keep-alive
        Accept-Language: en-GB,en-US,en
        Host: localhost:8080
        Range: bytes=1073152-64313343
        Accept: */*
        If-Range: A023EF02BD589BC472A2D6774EAE3C58
        User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 ...
        Referer: http://localhost:8080/BigBuckBunny_320x180.mp4
        Accept-Encoding: identity
        Accept-Charset: ISO-8859-1,utf-8,*
206 Partial Content
        Content-Type: video/mp4
        Connection: keep-alive
        Last-Modified: Wed,14 Dec 2011 15:50:59 GMT
        ETag: A023EF02BD589BC472A2D6774EAE3C58
        Transfer-Encoding:
        Content-Length: 63240192
        Accept-Ranges: bytes
        Server: Brisket/1.0.1
        Date: Wed,14 Dec 2011 16:11:25 GMT
        Content-Range: bytes 1073152-64313343/64657027