internal/server/server.go (view raw)
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import (
"context"
"fmt"
"net/http"
"time"
cfg "go.alanpearce.eu/website/internal/config"
"go.alanpearce.eu/x/log"
"gitlab.com/tozd/go/errors"
)
var (
CommitSHA = "local"
ShortSHA = "local"
serverHeader = fmt.Sprintf("website (%s)", ShortSHA)
ReadHeaderTimeout = 10 * time.Second
ReadTimeout = 1 * time.Minute
WriteTimeout = 2 * time.Minute
IdleTimeout = 10 * time.Minute
)
type Options struct {
Development bool
ListenAddress string
Port int
TLSPort int
TLS bool
ACMEIssuer string
ACMEIssuerCert string
Config *cfg.Config
}
type Server struct {
mux *http.ServeMux
options *Options
log *log.Logger
server *http.Server
}
func serverHeaderHandler(wrappedHandler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Server", serverHeader)
wrappedHandler.ServeHTTP(w, r)
})
}
func New(options *Options, log *log.Logger) (*Server, error) {
fixupMIMETypes(log)
return &Server{
mux: http.NewServeMux(),
log: log,
options: options,
}, nil
}
func (s *Server) HostApp(app *App) {
s.mux.Handle(app.Domain+"/", app.Handler)
}
func (s *Server) HostFallbackApp(app *App) {
s.mux.Handle("/", app.Handler)
}
func (s *Server) serve(tls bool) error {
if tls {
return s.serveTLS()
}
return s.serveTCP()
}
func (s *Server) Start() error {
top := http.NewServeMux()
top.Handle("/",
serverHeaderHandler(
wrapHandlerWithLogging(s.mux, s.log),
),
)
top.HandleFunc("/health", func(w http.ResponseWriter, _ *http.Request) {
w.WriteHeader(http.StatusNoContent)
})
s.server = &http.Server{
ReadHeaderTimeout: ReadHeaderTimeout,
ReadTimeout: ReadTimeout,
WriteTimeout: WriteTimeout,
IdleTimeout: IdleTimeout,
Handler: s.mux,
}
if err := s.serve(s.options.TLS); err != http.ErrServerClosed {
return errors.WithMessage(err, "error creating/closing server")
}
return nil
}
func (s *Server) Stop() chan struct{} {
s.log.Debug("stop called")
idleConnsClosed := make(chan struct{})
go func() {
s.log.Debug("shutting down server")
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
err := s.server.Shutdown(ctx)
s.log.Debug("server shut down")
if err != nil {
// Error from closing listeners, or context timeout:
s.log.Warn("HTTP server Shutdown", "error", err)
}
close(idleConnsClosed)
}()
return idleConnsClosed
}
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