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Vendor main dependencies.

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Timo Reimann 2017-02-07 22:33:23 +01:00
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19
vendor/github.com/mailgun/manners/LICENSE generated vendored Normal file
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Copyright (c) 2014 Braintree, a division of PayPal, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.

7
vendor/github.com/mailgun/manners/interfaces.go generated vendored Normal file
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package manners
type waitGroup interface {
Add(int)
Done()
Wait()
}

155
vendor/github.com/mailgun/manners/listener.go generated vendored Normal file
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package manners
import (
"crypto/tls"
"errors"
"fmt"
"net"
"os"
"sync"
"time"
)
// NewListener wraps an existing listener for use with
// GracefulServer.
//
// Note that you generally don't need to use this directly as
// GracefulServer will automatically wrap any non-graceful listeners
// supplied to it.
func NewListener(l net.Listener) *GracefulListener {
return &GracefulListener{
listener: l,
mutex: &sync.RWMutex{},
open: true,
}
}
// A GracefulListener differs from a standard net.Listener in one way: if
// Accept() is called after it is gracefully closed, it returns a
// listenerAlreadyClosed error. The GracefulServer will ignore this error.
type GracefulListener struct {
listener net.Listener
open bool
mutex *sync.RWMutex
}
func (l *GracefulListener) isClosed() bool {
l.mutex.RLock()
defer l.mutex.RUnlock()
return !l.open
}
func (l *GracefulListener) Addr() net.Addr {
return l.listener.Addr()
}
// Accept implements the Accept method in the Listener interface.
func (l *GracefulListener) Accept() (net.Conn, error) {
conn, err := l.listener.Accept()
if err != nil {
if l.isClosed() {
err = fmt.Errorf("listener already closed: err=(%s)", err)
}
return nil, err
}
return conn, nil
}
// Close tells the wrapped listener to stop listening. It is idempotent.
func (l *GracefulListener) Close() error {
l.mutex.Lock()
defer l.mutex.Unlock()
if !l.open {
return nil
}
l.open = false
return l.listener.Close()
}
func (l *GracefulListener) GetFile() (*os.File, error) {
return getListenerFile(l.listener)
}
func (l *GracefulListener) Clone() (net.Listener, error) {
l.mutex.Lock()
defer l.mutex.Unlock()
if !l.open {
return nil, errors.New("listener is already closed")
}
file, err := l.GetFile()
if err != nil {
return nil, err
}
defer file.Close()
fl, err := net.FileListener(file)
if nil != err {
return nil, err
}
return fl, nil
}
// A listener implements a network listener (net.Listener) for TLS connections.
// direct lift from crypto/tls.go
type TLSListener struct {
net.Listener
config *tls.Config
}
// Accept waits for and returns the next incoming TLS connection.
// The returned connection c is a *tls.Conn.
func (l *TLSListener) Accept() (c net.Conn, err error) {
c, err = l.Listener.Accept()
if err != nil {
return
}
c = tls.Server(c, l.config)
return
}
// NewListener creates a Listener which accepts connections from an inner
// Listener and wraps each connection with Server.
// The configuration config must be non-nil and must have
// at least one certificate.
func NewTLSListener(inner net.Listener, config *tls.Config) net.Listener {
l := new(TLSListener)
l.Listener = inner
l.config = config
return l
}
// TCPKeepAliveListener sets TCP keep-alive timeouts on accepted
// connections. It's used by ListenAndServe and ListenAndServeTLS so
// dead TCP connections (e.g. closing laptop mid-download) eventually
// go away.
//
// direct lift from net/http/server.go
type TCPKeepAliveListener struct {
*net.TCPListener
}
func (ln TCPKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}
func getListenerFile(listener net.Listener) (*os.File, error) {
switch t := listener.(type) {
case *net.TCPListener:
return t.File()
case *net.UnixListener:
return t.File()
case TCPKeepAliveListener:
return t.TCPListener.File()
case *TLSListener:
return getListenerFile(t.Listener)
}
return nil, fmt.Errorf("Unsupported listener: %T", listener)
}

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vendor/github.com/mailgun/manners/server.go generated vendored Normal file
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/*
Package manners provides a wrapper for a standard net/http server that
ensures all active HTTP client have completed their current request
before the server shuts down.
It can be used a drop-in replacement for the standard http package,
or can wrap a pre-configured Server.
eg.
http.Handle("/hello", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello\n"))
})
log.Fatal(manners.ListenAndServe(":8080", nil))
or for a customized server:
s := manners.NewWithServer(&http.Server{
Addr: ":8080",
Handler: myHandler,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
MaxHeaderBytes: 1 << 20,
})
log.Fatal(s.ListenAndServe())
The server will shut down cleanly when the Close() method is called:
go func() {
sigchan := make(chan os.Signal, 1)
signal.Notify(sigchan, os.Interrupt, os.Kill)
<-sigchan
log.Info("Shutting down...")
manners.Close()
}()
http.Handle("/hello", myHandler)
log.Fatal(manners.ListenAndServe(":8080", nil))
*/
package manners
import (
"crypto/tls"
"net"
"net/http"
"os"
"sync"
"sync/atomic"
"unsafe"
)
// StateHandler can be called by the server if the state of the connection changes.
// Notice that it passed previous state and the new state as parameters.
type StateHandler func(net.Conn, http.ConnState, http.ConnState)
// Options used by NewWithOptions to provide parameters for a GracefulServer
// instance to be created.
type Options struct {
Server *http.Server
StateHandler StateHandler
Listener net.Listener
}
// A GracefulServer maintains a WaitGroup that counts how many in-flight
// requests the server is handling. When it receives a shutdown signal,
// it stops accepting new requests but does not actually shut down until
// all in-flight requests terminate.
//
// GracefulServer embeds the underlying net/http.Server making its non-override
// methods and properties avaiable.
//
// It must be initialized by calling NewServer or NewWithServer
type GracefulServer struct {
*http.Server
shutdown chan bool
shutdownFinished chan bool
wg waitGroup
routinesCount int32
listener *GracefulListener
stateHandler StateHandler
connToProps map[net.Conn]connProperties
connToPropsMtx sync.RWMutex
up chan net.Listener // Only used by test code.
}
// NewServer creates a new GracefulServer.
func NewServer() *GracefulServer {
return NewWithOptions(Options{})
}
// NewWithServer wraps an existing http.Server object and returns a
// GracefulServer that supports all of the original Server operations.
func NewWithServer(s *http.Server) *GracefulServer {
return NewWithOptions(Options{Server: s})
}
// NewWithOptions creates a GracefulServer instance with the specified options.
func NewWithOptions(o Options) *GracefulServer {
var listener *GracefulListener
if o.Listener != nil {
g, ok := o.Listener.(*GracefulListener)
if !ok {
listener = NewListener(o.Listener)
} else {
listener = g
}
}
if o.Server == nil {
o.Server = new(http.Server)
}
return &GracefulServer{
Server: o.Server,
listener: listener,
stateHandler: o.StateHandler,
shutdown: make(chan bool),
shutdownFinished: make(chan bool, 1),
wg: new(sync.WaitGroup),
connToProps: make(map[net.Conn]connProperties),
}
}
// Close stops the server from accepting new requets and begins shutting down.
// It returns true if it's the first time Close is called.
func (gs *GracefulServer) Close() bool {
return <-gs.shutdown
}
// BlockingClose is similar to Close, except that it blocks until the last
// connection has been closed.
func (gs *GracefulServer) BlockingClose() bool {
result := gs.Close()
<-gs.shutdownFinished
return result
}
// ListenAndServe provides a graceful equivalent of net/http.Serve.ListenAndServe.
func (gs *GracefulServer) ListenAndServe() error {
if gs.listener == nil {
oldListener, err := net.Listen("tcp", gs.Addr)
if err != nil {
return err
}
gs.listener = NewListener(oldListener.(*net.TCPListener))
}
return gs.Serve(gs.listener)
}
// ListenAndServeTLS provides a graceful equivalent of net/http.Serve.ListenAndServeTLS.
func (gs *GracefulServer) ListenAndServeTLS(certFile, keyFile string) error {
// direct lift from net/http/server.go
addr := gs.Addr
if addr == "" {
addr = ":https"
}
config := &tls.Config{}
if gs.TLSConfig != nil {
*config = *gs.TLSConfig
}
if config.NextProtos == nil {
config.NextProtos = []string{"http/1.1"}
}
var err error
config.Certificates = make([]tls.Certificate, 1)
config.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
return gs.ListenAndServeTLSWithConfig(config)
}
// ListenAndServeTLS provides a graceful equivalent of net/http.Serve.ListenAndServeTLS.
func (gs *GracefulServer) ListenAndServeTLSWithConfig(config *tls.Config) error {
addr := gs.Addr
if addr == "" {
addr = ":https"
}
if gs.listener == nil {
ln, err := net.Listen("tcp", addr)
if err != nil {
return err
}
tlsListener := NewTLSListener(TCPKeepAliveListener{ln.(*net.TCPListener)}, config)
gs.listener = NewListener(tlsListener)
}
return gs.Serve(gs.listener)
}
func (gs *GracefulServer) GetFile() (*os.File, error) {
return gs.listener.GetFile()
}
func (gs *GracefulServer) HijackListener(s *http.Server, config *tls.Config) (*GracefulServer, error) {
listenerUnsafePtr := unsafe.Pointer(gs.listener)
listener, err := (*GracefulListener)(atomic.LoadPointer(&listenerUnsafePtr)).Clone()
if err != nil {
return nil, err
}
if config != nil {
listener = NewTLSListener(TCPKeepAliveListener{listener.(*net.TCPListener)}, config)
}
other := NewWithServer(s)
other.listener = NewListener(listener)
return other, nil
}
// Serve provides a graceful equivalent net/http.Server.Serve.
//
// If listener is not an instance of *GracefulListener it will be wrapped
// to become one.
func (gs *GracefulServer) Serve(listener net.Listener) error {
// Accept a net.Listener to preserve the interface compatibility with the
// standard http.Server. If it is not a GracefulListener then wrap it into
// one.
gracefulListener, ok := listener.(*GracefulListener)
if !ok {
gracefulListener = NewListener(listener)
listener = gracefulListener
}
listenerUnsafePtr := unsafe.Pointer(gs.listener)
atomic.StorePointer(&listenerUnsafePtr, unsafe.Pointer(gracefulListener))
// Wrap the server HTTP handler into graceful one, that will close kept
// alive connections if a new request is received after shutdown.
gracefulHandler := newGracefulHandler(gs.Server.Handler)
gs.Server.Handler = gracefulHandler
// Start a goroutine that waits for a shutdown signal and will stop the
// listener when it receives the signal. That in turn will result in
// unblocking of the http.Serve call.
go func() {
gs.shutdown <- true
close(gs.shutdown)
gracefulHandler.Close()
gs.Server.SetKeepAlivesEnabled(false)
gracefulListener.Close()
}()
originalConnState := gs.Server.ConnState
// s.ConnState is invoked by the net/http.Server every time a connection
// changes state. It keeps track of each connection's state over time,
// enabling manners to handle persisted connections correctly.
gs.ConnState = func(conn net.Conn, newState http.ConnState) {
gs.connToPropsMtx.RLock()
connProps := gs.connToProps[conn]
gs.connToPropsMtx.RUnlock()
switch newState {
case http.StateNew:
// New connection -> StateNew
connProps.protected = true
gs.StartRoutine()
case http.StateActive:
// (StateNew, StateIdle) -> StateActive
if gracefulHandler.IsClosed() {
conn.Close()
break
}
if !connProps.protected {
connProps.protected = true
gs.StartRoutine()
}
default:
// (StateNew, StateActive) -> (StateIdle, StateClosed, StateHiJacked)
if connProps.protected {
gs.FinishRoutine()
connProps.protected = false
}
}
if gs.stateHandler != nil {
gs.stateHandler(conn, connProps.state, newState)
}
connProps.state = newState
gs.connToPropsMtx.Lock()
if newState == http.StateClosed || newState == http.StateHijacked {
delete(gs.connToProps, conn)
} else {
gs.connToProps[conn] = connProps
}
gs.connToPropsMtx.Unlock()
if originalConnState != nil {
originalConnState(conn, newState)
}
}
// A hook to allow the server to notify others when it is ready to receive
// requests; only used by tests.
if gs.up != nil {
gs.up <- listener
}
err := gs.Server.Serve(listener)
// An error returned on shutdown is not worth reporting.
if err != nil && gracefulHandler.IsClosed() {
err = nil
}
// Wait for pending requests to complete regardless the Serve result.
gs.wg.Wait()
gs.shutdownFinished <- true
return err
}
// StartRoutine increments the server's WaitGroup. Use this if a web request
// starts more goroutines and these goroutines are not guaranteed to finish
// before the request.
func (gs *GracefulServer) StartRoutine() {
gs.wg.Add(1)
atomic.AddInt32(&gs.routinesCount, 1)
}
// FinishRoutine decrements the server's WaitGroup. Use this to complement
// StartRoutine().
func (gs *GracefulServer) FinishRoutine() {
gs.wg.Done()
atomic.AddInt32(&gs.routinesCount, -1)
}
// RoutinesCount returns the number of currently running routines
func (gs *GracefulServer) RoutinesCount() int {
return int(atomic.LoadInt32(&gs.routinesCount))
}
// gracefulHandler is used by GracefulServer to prevent calling ServeHTTP on
// to be closed kept-alive connections during the server shutdown.
type gracefulHandler struct {
closed int32 // accessed atomically.
wrapped http.Handler
}
func newGracefulHandler(wrapped http.Handler) *gracefulHandler {
return &gracefulHandler{
wrapped: wrapped,
}
}
func (gh *gracefulHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if atomic.LoadInt32(&gh.closed) == 0 {
gh.wrapped.ServeHTTP(w, r)
return
}
r.Body.Close()
// Server is shutting down at this moment, and the connection that this
// handler is being called on is about to be closed. So we do not need to
// actually execute the handler logic.
}
func (gh *gracefulHandler) Close() {
atomic.StoreInt32(&gh.closed, 1)
}
func (gh *gracefulHandler) IsClosed() bool {
return atomic.LoadInt32(&gh.closed) == 1
}
// connProperties is used to keep track of various properties of connections
// maintained by a gracefulServer.
type connProperties struct {
// Last known connection state.
state http.ConnState
// Tells whether the connection is going to defer server shutdown until
// the current HTTP request is completed.
protected bool
}

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package manners
import (
"net"
"net/http"
"sync"
)
var (
defaultServer *GracefulServer
defaultServerLock = &sync.Mutex{}
)
func init() {
defaultServerLock.Lock()
}
// ListenAndServe provides a graceful version of the function provided by the
// net/http package. Call Close() to stop the server.
func ListenAndServe(addr string, handler http.Handler) error {
defaultServer = NewWithServer(&http.Server{Addr: addr, Handler: handler})
defaultServerLock.Unlock()
return defaultServer.ListenAndServe()
}
// ListenAndServeTLS provides a graceful version of the function provided by the
// net/http package. Call Close() to stop the server.
func ListenAndServeTLS(addr string, certFile string, keyFile string, handler http.Handler) error {
defaultServer = NewWithServer(&http.Server{Addr: addr, Handler: handler})
defaultServerLock.Unlock()
return defaultServer.ListenAndServeTLS(certFile, keyFile)
}
// Serve provides a graceful version of the function provided by the net/http
// package. Call Close() to stop the server.
func Serve(l net.Listener, handler http.Handler) error {
defaultServer = NewWithServer(&http.Server{Handler: handler})
defaultServerLock.Unlock()
return defaultServer.Serve(l)
}
// Shuts down the default server used by ListenAndServe, ListenAndServeTLS and
// Serve. It returns true if it's the first time Close is called.
func Close() bool {
defaultServerLock.Lock()
return defaultServer.Close()
}

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104
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package timetools
import (
"sync"
"time"
)
// TimeProvider is an interface we use to mock time in tests.
type TimeProvider interface {
UtcNow() time.Time
Sleep(time.Duration)
After(time.Duration) <-chan time.Time
}
// RealTime is a real clock time, used in production.
type RealTime struct {
}
func (*RealTime) UtcNow() time.Time {
return time.Now().UTC()
}
func (*RealTime) Sleep(d time.Duration) {
time.Sleep(d)
}
func (*RealTime) After(d time.Duration) <-chan time.Time {
return time.After(d)
}
// FreezedTime is manually controlled time for use in tests.
type FreezedTime struct {
CurrentTime time.Time
}
func (t *FreezedTime) UtcNow() time.Time {
return t.CurrentTime
}
func (t *FreezedTime) Sleep(d time.Duration) {
t.CurrentTime = t.CurrentTime.Add(d)
}
func (t *FreezedTime) After(d time.Duration) <-chan time.Time {
t.Sleep(d)
c := make(chan time.Time, 1)
c <- t.CurrentTime
return c
}
type sleepableTime struct {
currentTime time.Time
waiters map[time.Time][]chan time.Time
mu sync.Mutex
}
// SleepProvider returns a TimeProvider that has good fakes for
// time.Sleep and time.After. Both functions will behave as if
// time is frozen until you call AdvanceTimeBy, at which point
// any calls to time.Sleep that should return do return and
// any ticks from time.After that should happen do happen.
func SleepProvider(currentTime time.Time) TimeProvider {
return &sleepableTime{
currentTime: currentTime,
waiters: make(map[time.Time][]chan time.Time),
}
}
func (t *sleepableTime) UtcNow() time.Time {
return t.currentTime
}
func (t *sleepableTime) Sleep(d time.Duration) {
<-t.After(d)
}
func (t *sleepableTime) After(d time.Duration) <-chan time.Time {
t.mu.Lock()
defer t.mu.Unlock()
c := make(chan time.Time, 1)
until := t.currentTime.Add(d)
t.waiters[until] = append(t.waiters[until], c)
return c
}
// AdvanceTimeBy simulates advancing time by some time.Duration d.
// This function panics if st is not the result of a call to
// SleepProvider.
func AdvanceTimeBy(st TimeProvider, d time.Duration) {
t := st.(*sleepableTime)
t.mu.Lock()
defer t.mu.Unlock()
t.currentTime = t.currentTime.Add(d)
for k, v := range t.waiters {
if k.Before(t.currentTime) {
for _, c := range v {
c <- t.currentTime
}
delete(t.waiters, k)
}
}
}

59
vendor/github.com/mailgun/timetools/rfc2822time.go generated vendored Normal file
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@ -0,0 +1,59 @@
package timetools
import (
"strconv"
"time"
"gopkg.in/mgo.v2/bson"
)
// We use RFC2822 format for timestamps everywhere ('Thu, 13 Oct 2011 18:02:00 GMT'), but
// by default Go's JSON package uses another format when decoding/encoding timestamps.
// That's why we declare our own timestamp type and implement its marshal/unmarshal methods
// so JSON package decodes/encodes it properly.
type RFC2822Time time.Time
func NewRFC2822Time(timestamp int64) RFC2822Time {
return RFC2822Time(time.Unix(timestamp, 0).UTC())
}
func (t RFC2822Time) Unix() int64 {
return time.Time(t).Unix()
}
func (t RFC2822Time) IsZero() bool {
return time.Time(t).IsZero()
}
func (t RFC2822Time) MarshalJSON() ([]byte, error) {
return []byte(strconv.Quote(time.Time(t).Format(time.RFC1123))), nil
}
func (t *RFC2822Time) UnmarshalJSON(s []byte) error {
q, err := strconv.Unquote(string(s))
if err != nil {
return err
}
if *(*time.Time)(t), err = time.Parse(time.RFC1123, q); err != nil {
return err
}
return nil
}
func (t RFC2822Time) GetBSON() (interface{}, error) {
return time.Time(t), nil
}
func (t *RFC2822Time) SetBSON(raw bson.Raw) error {
var result time.Time
err := raw.Unmarshal(&result)
if err != nil {
return err
}
*t = RFC2822Time(result)
return nil
}
func (t RFC2822Time) String() string {
return time.Time(t).Format(time.RFC1123)
}