30 lignes
625 o
Go
30 lignes
625 o
Go
|
package httptoo
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"net/http"
|
||
|
|
)
|
||
|
|
|
||
|
|
var closeNotifyContextKey = new(struct{})
|
||
|
|
|
||
|
|
func RequestWithCloseNotify(r *http.Request, w http.ResponseWriter) *http.Request {
|
||
|
|
if r.Context().Value(closeNotifyContextKey) != nil {
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
v := make(chan struct{})
|
||
|
|
r = r.WithContext(context.WithValue(r.Context(), closeNotifyContextKey, v))
|
||
|
|
cn := w.(http.CloseNotifier).CloseNotify()
|
||
|
|
go func() {
|
||
|
|
select {
|
||
|
|
case <-cn:
|
||
|
|
close(v)
|
||
|
|
case <-r.Context().Done():
|
||
|
|
}
|
||
|
|
}()
|
||
|
|
return r
|
||
|
|
}
|
||
|
|
|
||
|
|
func RequestCloseNotifyValue(r *http.Request) <-chan struct{} {
|
||
|
|
return r.Context().Value(closeNotifyContextKey).(chan struct{})
|
||
|
|
}
|