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// SPDX-License-Identifier: MIT
// SPDX-FileCopyrightText: © 2015 LabStack LLC and Echo contributors
//go:build !go1.20
package middleware
import (
"bufio"
"fmt"
"net"
"net/http"
)
// TODO: remove when Go 1.23 is released and we do not support 1.19 anymore
func responseControllerFlush(rw http.ResponseWriter) error {
for {
switch t := rw.(type) {
case interface{ FlushError() error }:
return t.FlushError()
case http.Flusher:
t.Flush()
return nil
case interface{ Unwrap() http.ResponseWriter }:
rw = t.Unwrap()
default:
return fmt.Errorf("%w", http.ErrNotSupported)
}
}
}
// TODO: remove when Go 1.23 is released and we do not support 1.19 anymore
func responseControllerHijack(rw http.ResponseWriter) (net.Conn, *bufio.ReadWriter, error) {
for {
switch t := rw.(type) {
case http.Hijacker:
return t.Hijack()
case interface{ Unwrap() http.ResponseWriter }:
rw = t.Unwrap()
default:
return nil, nil, fmt.Errorf("%w", http.ErrNotSupported)
}
}
}
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