html5流式视频是否可缓存? [英] Are html5 streamed videos cacheable?

问题描述

我正在使用jwplayer以html5模式播放视频.视频为mp4格式.

I'm using jwplayer to play videos in html5 mode. Videos are in mp4 format.

我在网络"标签中看到的是一堆状态为206(部分下载)的网络请求.因此，我的理解是->视频仅以部分块的形式进行流传输，每个块1-2 Mb.

What I'm seeing in the network tab are bunch of network requests with 206 status (partial download). So my understanding is -> video is just being streamed in partial chunks, 1-2 Mb each.

但是这些块可以缓存在浏览器中吗?目前，我看到视频每次都在重新流式传输...

But can those chunks be cached in the browser? Currently I'm seeing video just being re-streamed every time...

推荐答案

参考此答案:是，206响应是可缓存的.这也在 RFC 7233第4.1节中明确声明:

With reference to this answer: Yes, 206 responses are cacheable. This is also explicitly stated in RFC 7233, section 4.1:

默认情况下，206响应是可缓存的；即除非明确的缓存控件另有说明

A 206 response is cacheable by default; i.e., unless otherwise indicated by explicit cache controls

这当然并不意味着浏览器 do 会缓存它们.但是他们当然可以.

This does not mean that browser do cache those, of course. But they certainly can.

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