Add global idler and other helpers #2
75
anyhttp.go
75
anyhttp.go
@ -14,6 +14,15 @@ import (
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"syscall"
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)
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type AddressType string
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var (
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UnixSocket AddressType = "UnixSocket"
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SystemdFD AddressType = "SystemdFD"
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TCP AddressType = "TCP"
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Unknown AddressType = "Unknown"
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)
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// UnixSocketConfig has the configuration for Unix socket
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type UnixSocketConfig struct {
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@ -182,59 +191,61 @@ func (s *SysdConfig) GetListener() (net.Listener, error) {
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return nil, errors.New("neither FDIndex nor FDName set")
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}
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// UnknownAddress Error is returned when address does not match any known syntax
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type UnknownAddress struct{}
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func (u UnknownAddress) Error() string {
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return "unknown address"
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}
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// GetListener gets a unix or systemd socket listener
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func GetListener(addr string) (net.Listener, error) {
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func GetListener(addr string) (AddressType, net.Listener, error) {
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if strings.HasPrefix(addr, "unix/") {
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usc := NewUnixSocketConfig(strings.TrimPrefix(addr, "unix/"))
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return usc.GetListener()
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l, err := usc.GetListener()
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return UnixSocket, l, err
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}
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if strings.HasPrefix(addr, "sysd/fdidx/") {
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idx, err := strconv.Atoi(strings.TrimPrefix(addr, "sysd/fdidx/"))
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if err != nil {
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return nil, fmt.Errorf("invalid fdidx, addr:%q err: %w", addr, err)
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return Unknown, nil, fmt.Errorf("invalid fdidx, addr:%q err: %w", addr, err)
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}
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sysdc := NewSysDConfigWithFDIdx(idx)
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return sysdc.GetListener()
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l, err := sysdc.GetListener()
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return SystemdFD, l, err
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}
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if strings.HasPrefix(addr, "sysd/fdname/") {
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sysdc := NewSysDConfigWithFDName(strings.TrimPrefix(addr, "sysd/fdname/"))
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return sysdc.GetListener()
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l, err := sysdc.GetListener()
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return SystemdFD, l, err
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}
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return nil, UnknownAddress{}
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if port, err := strconv.Atoi(addr); err == nil {
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if port > 0 && port < 65536 {
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addr = fmt.Sprintf(":%v", port)
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} else {
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return Unknown, nil, fmt.Errorf("invalid port: %v", port)
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}
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}
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if addr == "" {
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addr = ":http"
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}
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l, err := net.Listen("tcp", addr)
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return TCP, l, err
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}
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func ListenAndServeHTTP(addr string, h http.Handler) (AddressType, *http.Server, error) {
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addrType, listener, err := GetListener(addr)
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if err != nil {
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return addrType, nil, err
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}
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srv := &http.Server{Handler: h}
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err = srv.Serve(listener)
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return addrType, srv, err
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}
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// ListenAndServe is the drop-in replacement for `http.ListenAndServe`.
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// Supports unix and systemd sockets in addition
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func ListenAndServe(addr string, h http.Handler) error {
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listener, err := GetListener(addr)
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if _, isUnknown := err.(UnknownAddress); err != nil && !isUnknown {
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return err
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}
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if listener != nil {
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return http.Serve(listener, h)
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}
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if port, err := strconv.Atoi(addr); err == nil {
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if port > 0 && port < 65536 {
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return http.ListenAndServe(fmt.Sprintf(":%v", port), h)
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}
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return fmt.Errorf("invalid port: %v", port)
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}
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return http.ListenAndServe(addr, h)
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_, _, err := ListenAndServeHTTP(addr, h)
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return err
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}
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// UnsetSystemdListenVars unsets the LISTEN* environment variables so they are not passed to any child processes
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