1 files changed, 0 insertions, 489 deletions
diff --git a/vendor/github.com/tylerb/graceful/graceful.go b/vendor/github.com/tylerb/graceful/graceful.go
deleted file mode 100644
index ebf0aeb7..00000000
--- a/vendor/github.com/tylerb/graceful/graceful.go
+++ /dev/null
@@ -1,489 +0,0 @@
-package graceful
-
-import (
-	"crypto/tls"
-	"log"
-	"net"
-	"net/http"
-	"os"
-	"sync"
-	"time"
-)
-
-// Server wraps an http.Server with graceful connection handling.
-// It may be used directly in the same way as http.Server, or may
-// be constructed with the global functions in this package.
-//
-// Example:
-//	srv := &graceful.Server{
-//		Timeout: 5 * time.Second,
-//		Server: &http.Server{Addr: ":1234", Handler: handler},
-//	}
-//	srv.ListenAndServe()
-type Server struct {
-	*http.Server
-
-	// Timeout is the duration to allow outstanding requests to survive
-	// before forcefully terminating them.
-	Timeout time.Duration
-
-	// Limit the number of outstanding requests
-	ListenLimit int
-
-	// TCPKeepAlive sets the TCP keep-alive timeouts on accepted
-	// connections. It prunes dead TCP connections ( e.g. closing
-	// laptop mid-download)
-	TCPKeepAlive time.Duration
-
-	// ConnState specifies an optional callback function that is
-	// called when a client connection changes state. This is a proxy
-	// to the underlying http.Server's ConnState, and the original
-	// must not be set directly.
-	ConnState func(net.Conn, http.ConnState)
-
-	// BeforeShutdown is an optional callback function that is called
-	// before the listener is closed. Returns true if shutdown is allowed
-	BeforeShutdown func() bool
-
-	// ShutdownInitiated is an optional callback function that is called
-	// when shutdown is initiated. It can be used to notify the client
-	// side of long lived connections (e.g. websockets) to reconnect.
-	ShutdownInitiated func()
-
-	// NoSignalHandling prevents graceful from automatically shutting down
-	// on SIGINT and SIGTERM. If set to true, you must shut down the server
-	// manually with Stop().
-	NoSignalHandling bool
-
-	// Logger used to notify of errors on startup and on stop.
-	Logger *log.Logger
-
-	// LogFunc can be assigned with a logging function of your choice, allowing
-	// you to use whatever logging approach you would like
-	LogFunc func(format string, args ...interface{})
-
-	// Interrupted is true if the server is handling a SIGINT or SIGTERM
-	// signal and is thus shutting down.
-	Interrupted bool
-
-	// interrupt signals the listener to stop serving connections,
-	// and the server to shut down.
-	interrupt chan os.Signal
-
-	// stopLock is used to protect against concurrent calls to Stop
-	stopLock sync.Mutex
-
-	// stopChan is the channel on which callers may block while waiting for
-	// the server to stop.
-	stopChan chan struct{}
-
-	// chanLock is used to protect access to the various channel constructors.
-	chanLock sync.RWMutex
-
-	// connections holds all connections managed by graceful
-	connections map[net.Conn]struct{}
-
-	// idleConnections holds all idle connections managed by graceful
-	idleConnections map[net.Conn]struct{}
-}
-
-// Run serves the http.Handler with graceful shutdown enabled.
-//
-// timeout is the duration to wait until killing active requests and stopping the server.
-// If timeout is 0, the server never times out. It waits for all active requests to finish.
-func Run(addr string, timeout time.Duration, n http.Handler) {
-	srv := &Server{
-		Timeout:      timeout,
-		TCPKeepAlive: 3 * time.Minute,
-		Server:       &http.Server{Addr: addr, Handler: n},
-		// Logger:       DefaultLogger(),
-	}
-
-	if err := srv.ListenAndServe(); err != nil {
-		if opErr, ok := err.(*net.OpError); !ok || (ok && opErr.Op != "accept") {
-			srv.logf("%s", err)
-			os.Exit(1)
-		}
-	}
-
-}
-
-// RunWithErr is an alternative version of Run function which can return error.
-//
-// Unlike Run this version will not exit the program if an error is encountered but will
-// return it instead.
-func RunWithErr(addr string, timeout time.Duration, n http.Handler) error {
-	srv := &Server{
-		Timeout:      timeout,
-		TCPKeepAlive: 3 * time.Minute,
-		Server:       &http.Server{Addr: addr, Handler: n},
-		Logger:       DefaultLogger(),
-	}
-
-	return srv.ListenAndServe()
-}
-
-// ListenAndServe is equivalent to http.Server.ListenAndServe with graceful shutdown enabled.
-//
-// timeout is the duration to wait until killing active requests and stopping the server.
-// If timeout is 0, the server never times out. It waits for all active requests to finish.
-func ListenAndServe(server *http.Server, timeout time.Duration) error {
-	srv := &Server{Timeout: timeout, Server: server, Logger: DefaultLogger()}
-	return srv.ListenAndServe()
-}
-
-// ListenAndServe is equivalent to http.Server.ListenAndServe with graceful shutdown enabled.
-func (srv *Server) ListenAndServe() error {
-	// Create the listener so we can control their lifetime
-	addr := srv.Addr
-	if addr == "" {
-		addr = ":http"
-	}
-	conn, err := srv.newTCPListener(addr)
-	if err != nil {
-		return err
-	}
-
-	return srv.Serve(conn)
-}
-
-// ListenAndServeTLS is equivalent to http.Server.ListenAndServeTLS with graceful shutdown enabled.
-//
-// timeout is the duration to wait until killing active requests and stopping the server.
-// If timeout is 0, the server never times out. It waits for all active requests to finish.
-func ListenAndServeTLS(server *http.Server, certFile, keyFile string, timeout time.Duration) error {
-	srv := &Server{Timeout: timeout, Server: server, Logger: DefaultLogger()}
-	return srv.ListenAndServeTLS(certFile, keyFile)
-}
-
-// ListenTLS is a convenience method that creates an https listener using the
-// provided cert and key files. Use this method if you need access to the
-// listener object directly. When ready, pass it to the Serve method.
-func (srv *Server) ListenTLS(certFile, keyFile string) (net.Listener, error) {
-	// Create the listener ourselves so we can control its lifetime
-	addr := srv.Addr
-	if addr == "" {
-		addr = ":https"
-	}
-
-	config := &tls.Config{}
-	if srv.TLSConfig != nil {
-		*config = *srv.TLSConfig
-	}
-
-	var err error
-	if certFile != "" && keyFile != "" {
-		config.Certificates = make([]tls.Certificate, 1)
-		config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	// Enable http2
-	enableHTTP2ForTLSConfig(config)
-
-	conn, err := srv.newTCPListener(addr)
-	if err != nil {
-		return nil, err
-	}
-
-	srv.TLSConfig = config
-
-	tlsListener := tls.NewListener(conn, config)
-	return tlsListener, nil
-}
-
-// Enable HTTP2ForTLSConfig explicitly enables http/2 for a TLS Config. This is due to changes in Go 1.7 where
-// http servers are no longer automatically configured to enable http/2 if the server's TLSConfig is set.
-// See https://github.com/golang/go/issues/15908
-func enableHTTP2ForTLSConfig(t *tls.Config) {
-
-	if TLSConfigHasHTTP2Enabled(t) {
-		return
-	}
-
-	t.NextProtos = append(t.NextProtos, "h2")
-}
-
-// TLSConfigHasHTTP2Enabled checks to see if a given TLS Config has http2 enabled.
-func TLSConfigHasHTTP2Enabled(t *tls.Config) bool {
-	for _, value := range t.NextProtos {
-		if value == "h2" {
-			return true
-		}
-	}
-	return false
-}
-
-// ListenAndServeTLS is equivalent to http.Server.ListenAndServeTLS with graceful shutdown enabled.
-func (srv *Server) ListenAndServeTLS(certFile, keyFile string) error {
-	l, err := srv.ListenTLS(certFile, keyFile)
-	if err != nil {
-		return err
-	}
-
-	return srv.Serve(l)
-}
-
-// ListenAndServeTLSConfig can be used with an existing TLS config and is equivalent to
-// http.Server.ListenAndServeTLS with graceful shutdown enabled,
-func (srv *Server) ListenAndServeTLSConfig(config *tls.Config) error {
-	addr := srv.Addr
-	if addr == "" {
-		addr = ":https"
-	}
-
-	conn, err := srv.newTCPListener(addr)
-	if err != nil {
-		return err
-	}
-
-	srv.TLSConfig = config
-
-	tlsListener := tls.NewListener(conn, config)
-	return srv.Serve(tlsListener)
-}
-
-// Serve is equivalent to http.Server.Serve with graceful shutdown enabled.
-//
-// timeout is the duration to wait until killing active requests and stopping the server.
-// If timeout is 0, the server never times out. It waits for all active requests to finish.
-func Serve(server *http.Server, l net.Listener, timeout time.Duration) error {
-	srv := &Server{Timeout: timeout, Server: server, Logger: DefaultLogger()}
-
-	return srv.Serve(l)
-}
-
-// Serve is equivalent to http.Server.Serve with graceful shutdown enabled.
-func (srv *Server) Serve(listener net.Listener) error {
-
-	if srv.ListenLimit != 0 {
-		listener = LimitListener(listener, srv.ListenLimit)
-	}
-
-	// Make our stopchan
-	srv.StopChan()
-
-	// Track connection state
-	add := make(chan net.Conn)
-	idle := make(chan net.Conn)
-	active := make(chan net.Conn)
-	remove := make(chan net.Conn)
-
-	srv.Server.ConnState = func(conn net.Conn, state http.ConnState) {
-		switch state {
-		case http.StateNew:
-			add <- conn
-		case http.StateActive:
-			active <- conn
-		case http.StateIdle:
-			idle <- conn
-		case http.StateClosed, http.StateHijacked:
-			remove <- conn
-		}
-
-		srv.stopLock.Lock()
-		defer srv.stopLock.Unlock()
-
-		if srv.ConnState != nil {
-			srv.ConnState(conn, state)
-		}
-	}
-
-	// Manage open connections
-	shutdown := make(chan chan struct{})
-	kill := make(chan struct{})
-	go srv.manageConnections(add, idle, active, remove, shutdown, kill)
-
-	interrupt := srv.interruptChan()
-	// Set up the interrupt handler
-	if !srv.NoSignalHandling {
-		signalNotify(interrupt)
-	}
-	quitting := make(chan struct{})
-	go srv.handleInterrupt(interrupt, quitting, listener)
-
-	// Serve with graceful listener.
-	// Execution blocks here until listener.Close() is called, above.
-	err := srv.Server.Serve(listener)
-	if err != nil {
-		// If the underlying listening is closed, Serve returns an error
-		// complaining about listening on a closed socket. This is expected, so
-		// let's ignore the error if we are the ones who explicitly closed the
-		// socket.
-		select {
-		case <-quitting:
-			err = nil
-		default:
-		}
-	}
-
-	srv.shutdown(shutdown, kill)
-
-	return err
-}
-
-// Stop instructs the type to halt operations and close
-// the stop channel when it is finished.
-//
-// timeout is grace period for which to wait before shutting
-// down the server. The timeout value passed here will override the
-// timeout given when constructing the server, as this is an explicit
-// command to stop the server.
-func (srv *Server) Stop(timeout time.Duration) {
-	srv.stopLock.Lock()
-	defer srv.stopLock.Unlock()
-
-	srv.Timeout = timeout
-	sendSignalInt(srv.interruptChan())
-}
-
-// StopChan gets the stop channel which will block until
-// stopping has completed, at which point it is closed.
-// Callers should never close the stop channel.
-func (srv *Server) StopChan() <-chan struct{} {
-	srv.chanLock.Lock()
-	defer srv.chanLock.Unlock()
-
-	if srv.stopChan == nil {
-		srv.stopChan = make(chan struct{})
-	}
-	return srv.stopChan
-}
-
-// DefaultLogger returns the logger used by Run, RunWithErr, ListenAndServe, ListenAndServeTLS and Serve.
-// The logger outputs to STDERR by default.
-func DefaultLogger() *log.Logger {
-	return log.New(os.Stderr, "[graceful] ", 0)
-}
-
-func (srv *Server) manageConnections(add, idle, active, remove chan net.Conn, shutdown chan chan struct{}, kill chan struct{}) {
-	var done chan struct{}
-	srv.connections = map[net.Conn]struct{}{}
-	srv.idleConnections = map[net.Conn]struct{}{}
-	for {
-		select {
-		case conn := <-add:
-			srv.connections[conn] = struct{}{}
-			srv.idleConnections[conn] = struct{}{} // Newly-added connections are considered idle until they become active.
-		case conn := <-idle:
-			srv.idleConnections[conn] = struct{}{}
-		case conn := <-active:
-			delete(srv.idleConnections, conn)
-		case conn := <-remove:
-			delete(srv.connections, conn)
-			delete(srv.idleConnections, conn)
-			if done != nil && len(srv.connections) == 0 {
-				done <- struct{}{}
-				return
-			}
-		case done = <-shutdown:
-			if len(srv.connections) == 0 && len(srv.idleConnections) == 0 {
-				done <- struct{}{}
-				return
-			}
-			// a shutdown request has been received. if we have open idle
-			// connections, we must close all of them now. this prevents idle
-			// connections from holding the server open while waiting for them to
-			// hit their idle timeout.
-			for k := range srv.idleConnections {
-				if err := k.Close(); err != nil {
-					srv.logf("[ERROR] %s", err)
-				}
-			}
-		case <-kill:
-			srv.stopLock.Lock()
-			defer srv.stopLock.Unlock()
-
-			srv.Server.ConnState = nil
-			for k := range srv.connections {
-				if err := k.Close(); err != nil {
-					srv.logf("[ERROR] %s", err)
-				}
-			}
-			return
-		}
-	}
-}
-
-func (srv *Server) interruptChan() chan os.Signal {
-	srv.chanLock.Lock()
-	defer srv.chanLock.Unlock()
-
-	if srv.interrupt == nil {
-		srv.interrupt = make(chan os.Signal, 1)
-	}
-
-	return srv.interrupt
-}
-
-func (srv *Server) handleInterrupt(interrupt chan os.Signal, quitting chan struct{}, listener net.Listener) {
-	for _ = range interrupt {
-		if srv.Interrupted {
-			srv.logf("already shutting down")
-			continue
-		}
-		srv.logf("shutdown initiated")
-		srv.Interrupted = true
-		if srv.BeforeShutdown != nil {
-			if !srv.BeforeShutdown() {
-				srv.Interrupted = false
-				continue
-			}
-		}
-
-		close(quitting)
-		srv.SetKeepAlivesEnabled(false)
-		if err := listener.Close(); err != nil {
-			srv.logf("[ERROR] %s", err)
-		}
-
-		if srv.ShutdownInitiated != nil {
-			srv.ShutdownInitiated()
-		}
-	}
-}
-
-func (srv *Server) logf(format string, args ...interface{}) {
-	if srv.LogFunc != nil {
-		srv.LogFunc(format, args...)
-	} else if srv.Logger != nil {
-		srv.Logger.Printf(format, args...)
-	}
-}
-
-func (srv *Server) shutdown(shutdown chan chan struct{}, kill chan struct{}) {
-	// Request done notification
-	done := make(chan struct{})
-	shutdown <- done
-
-	srv.stopLock.Lock()
-	defer srv.stopLock.Unlock()
-	if srv.Timeout > 0 {
-		select {
-		case <-done:
-		case <-time.After(srv.Timeout):
-			close(kill)
-		}
-	} else {
-		<-done
-	}
-	// Close the stopChan to wake up any blocked goroutines.
-	srv.chanLock.Lock()
-	if srv.stopChan != nil {
-		close(srv.stopChan)
-	}
-	srv.chanLock.Unlock()
-}
-
-func (srv *Server) newTCPListener(addr string) (net.Listener, error) {
-	conn, err := net.Listen("tcp", addr)
-	if err != nil {
-		return conn, err
-	}
-	if srv.TCPKeepAlive != 0 {
-		conn = keepAliveListener{conn, srv.TCPKeepAlive}
-	}
-	return conn, nil
-}