pomerium/internal/httputil/http.go
Bobby DeSimone 5edfa7b03f
telemetry: add tracing
- telemetry/tace: add traces throughout code
- telemetry/metrics: nest metrics and trace under telemetry
- telemetry/tace: add service name span to HTTPMetricsHandler.
- telemetry/metrics: removed chain dependency middleware_tests.
- telemetry/metrics: wrap and encapsulate variatic view registration.
- telemetry/tace: add jaeger support for tracing.
- cmd/pomerium: move `parseOptions` to internal/config.
- cmd/pomerium: offload server handling to httputil and sub pkgs.
- httputil: standardize creation/shutdown of http listeners.
- httputil: prefer curve X25519 to P256 when negotiating TLS.
- fileutil: use standardized Getw

Signed-off-by: Bobby DeSimone <bobbydesimone@gmail.com>
2019-07-24 09:20:16 -07:00

76 lines
2.5 KiB
Go

package httputil // import "github.com/pomerium/pomerium/internal/httputil"
import (
"context"
"fmt"
stdlog "log"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"github.com/pomerium/pomerium/internal/log"
"github.com/pomerium/pomerium/internal/urlutil"
)
// NewHTTPServer starts a http server given a set of options and a handler.
//
// It is the caller's responsibility to Close() or Shutdown() the returned
// server.
func NewHTTPServer(opt *ServerOptions, h http.Handler) *http.Server {
if opt == nil {
opt = defaultHTTPServerOptions
} else {
opt.applyHTTPDefaults()
}
sublogger := log.With().Str("addr", opt.Addr).Logger()
srv := http.Server{
Addr: opt.Addr,
ReadHeaderTimeout: opt.ReadHeaderTimeout,
ReadTimeout: opt.ReadTimeout,
WriteTimeout: opt.WriteTimeout,
IdleTimeout: opt.IdleTimeout,
Handler: h,
ErrorLog: stdlog.New(&log.StdLogWrapper{Logger: &sublogger}, "", 0),
}
go func() {
if err := srv.ListenAndServe(); err != http.ErrServerClosed {
log.Error().Str("addr", opt.Addr).Err(err).Msg("internal/httputil: unexpected shutdown")
}
}()
return &srv
}
func RedirectHandler() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Connection", "close")
url := fmt.Sprintf("https://%s%s", urlutil.StripPort(r.Host), r.URL.String())
http.Redirect(w, r, url, http.StatusMovedPermanently)
})
}
// Shutdown attempts to shut down the server when a os interrupt or sigterm
// signal are received without interrupting any
// active connections. Shutdown works by first closing all open
// listeners, then closing all idle connections, and then waiting
// indefinitely for connections to return to idle and then shut down.
// If the provided context expires before the shutdown is complete,
// Shutdown returns the context's error, otherwise it returns any
// error returned from closing the Server's underlying Listener(s).
//
// When Shutdown is called, Serve, ListenAndServe, and
// ListenAndServeTLS immediately return ErrServerClosed.
func Shutdown(srv *http.Server) {
sigint := make(chan os.Signal, 1)
signal.Notify(sigint, os.Interrupt)
signal.Notify(sigint, syscall.SIGTERM)
rec := <-sigint
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
log.Info().Str("signal", rec.String()).Msg("internal/httputil: shutting down servers")
if err := srv.Shutdown(ctx); err != nil {
log.Error().Err(err).Msg("internal/httputil: shutdown failed")
}
}