问取消请求不会传播到云运行容器

EN

package main

import (
    "log"
    "net/http"
    "os"
    "time"
)

func main() {
    port := os.Getenv("PORT")
    if port == "" {
        port = "8080"
    }
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        ctx := r.Context()
        select {
        case <-ctx.Done():
            log.Printf("context cancelled")
        case <-time.After(time.Minute):
            w.Write([]byte("OK"))
            log.Printf("request completed. path=%s", r.URL.Path)
        }
    })
    log.Fatal(http.ListenAndServe(":"+port, nil))
}