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johncming / go-spec

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HTTP/2 Server Push #33

Closed johncming closed 6 years ago

johncming commented 6 years ago

ref

image

充分利用网络资源

johncming commented 6 years ago

PUSH_PROMISE

在协议级别，HTTP / 2服务器推送由PUSH_PROMISE 帧驱动。A PUSH_PROMISE描述服务器预测浏览器将在不久的将来发出的请求。一旦浏览器收到PUSH_PROMISE，它就知道服务器将提供资源。如果浏览器稍后发现它需要此资源，它将等待推送完成而不是发送新请求。这减少了浏览器在网络上等待的时间。

johncming commented 6 years ago 
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        if pusher, ok := w.(http.Pusher); ok {
            // Push is supported.
            if err := pusher.Push("/app.js", nil); err != nil {
                log.Printf("Failed to push: %v", err)
            }
        }
        // ...
    })
johncming commented 6 years ago

使用时机