Golang’s request context is automatically be done when passed on goroutine, and its parents goroutine is already done.
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| package main
import (
"context"
"log"
"net/http"
"time"
)
func foo(ctx context.Context) {
ctx, cancel := context.WithTimeout(ctx, 60*time.Second)
defer cancel()
req, _ := http.NewRequestWithContext(ctx,
http.MethodGet, "https://google.com", nil)
_, err := http.DefaultClient.Do(req)
log.Println(err) // Get "https://google.com": context canceled
}
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
go foo(r.Context())
}) // context will be done when it reaches here
http.ListenAndServe(":8888", nil)
}
|
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