88 lines
1.7 KiB
Go
88 lines
1.7 KiB
Go
package httpd
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import (
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"fmt"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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)
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// Service manages the listener and handler for an HTTP endpoint.
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type Service struct {
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ln net.Listener
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addr string
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err chan error
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Handler *Handler
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Logger *log.Logger
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}
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// NewService returns a new instance of Service.
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func NewService(c Config) *Service {
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s := &Service{
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addr: c.BindAddress,
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err: make(chan error),
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Handler: NewHandler(
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c.AuthEnabled,
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c.LogEnabled,
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c.WriteTracing,
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),
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Logger: log.New(os.Stderr, "[httpd] ", log.LstdFlags),
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}
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s.Handler.Logger = s.Logger
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return s
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}
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// Open starts the service
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func (s *Service) Open() error {
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// Open listener.
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ln, err := net.Listen("tcp", s.addr)
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if err != nil {
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return err
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}
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s.ln = ln
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s.Logger.Println("listening on HTTP:", ln.Addr().String())
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// Begin listening for requests in a separate goroutine.
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go s.serve()
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return nil
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}
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// Close closes the underlying listener.
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func (s *Service) Close() error {
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if s.ln != nil {
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return s.ln.Close()
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}
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return nil
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}
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// SetLogger sets the internal logger to the logger passed in.
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func (s *Service) SetLogger(l *log.Logger) {
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s.Logger = l
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}
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// Err returns a channel for fatal errors that occur on the listener.
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func (s *Service) Err() <-chan error { return s.err }
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// Addr returns the listener's address. Returns nil if listener is closed.
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func (s *Service) Addr() net.Addr {
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if s.ln != nil {
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return s.ln.Addr()
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}
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return nil
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}
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// serve serves the handler from the listener.
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func (s *Service) serve() {
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// The listener was closed so exit
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// See https://github.com/golang/go/issues/4373
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err := http.Serve(s.ln, s.Handler)
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if err != nil && !strings.Contains(err.Error(), "closed") {
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s.err <- fmt.Errorf("listener failed: addr=%s, err=%s", s.Addr(), err)
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}
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}
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