package acme import ( "io" "io/ioutil" "net" "net/http" "os" "path" ) const wellKnown = `/.well-known/acme-challenge/` func init() { registerChallenge(ChallengeHTTP) } type httpChallenge struct { Challenge Addr string } func (c httpChallenge) ServeHTTP(w http.ResponseWriter, r *http.Request) { io.WriteString(w, c.KeyAuthorization) } func (c httpChallenge) Solve() error { done := make(chan bool) l, err := net.Listen("tcp", c.Addr) if err != nil { return err } defer l.Close() s := &http.Server{ Handler: c, ConnState: func(_ net.Conn, st http.ConnState) { if st == http.StateClosed { done <- true } }, } s.SetKeepAlivesEnabled(false) go s.Serve(l) <-done return nil } type webRoot struct { Challenge Webroot string } func (c webRoot) Solve() error { file := path.Join(c.Webroot, wellKnown, c.Token) if err := os.MkdirAll(path.Dir(file), 0755); err != nil { return err } return ioutil.WriteFile(file, []byte(c.KeyAuthorization), 0644) }