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// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package api
import (
"crypto/tls"
"net"
"net/http"
"strings"
"time"
l4g "github.com/alecthomas/log4go"
"github.com/gorilla/handlers"
"github.com/gorilla/mux"
"github.com/mattermost/platform/model"
"github.com/mattermost/platform/store"
"github.com/mattermost/platform/utils"
"github.com/rsc/letsencrypt"
"github.com/tylerb/graceful"
"gopkg.in/throttled/throttled.v2"
"gopkg.in/throttled/throttled.v2/store/memstore"
)
type Server struct {
Store store.Store
Router *mux.Router
GracefulServer *graceful.Server
}
type CorsWrapper struct {
router *mux.Router
}
const TIME_TO_WAIT_FOR_CONNECTIONS_TO_CLOSE_ON_SERVER_SHUTDOWN = time.Second
var Srv *Server
func NewServer() {
l4g.Info(utils.T("api.server.new_server.init.info"))
Srv = &Server{}
}
func InitStores() {
Srv.Store = store.NewSqlStore()
}
func InitRouter() {
Srv.Router = mux.NewRouter()
Srv.Router.NotFoundHandler = http.HandlerFunc(Handle404)
}
type VaryBy struct{}
func (m *VaryBy) Key(r *http.Request) string {
return GetIpAddress(r)
}
func initalizeThrottledVaryBy() *throttled.VaryBy {
vary := throttled.VaryBy{}
if utils.Cfg.RateLimitSettings.VaryByRemoteAddr {
vary.RemoteAddr = true
}
if len(utils.Cfg.RateLimitSettings.VaryByHeader) > 0 {
vary.Headers = strings.Fields(utils.Cfg.RateLimitSettings.VaryByHeader)
if utils.Cfg.RateLimitSettings.VaryByRemoteAddr {
l4g.Warn(utils.T("api.server.start_server.rate.warn"))
vary.RemoteAddr = false
}
}
return &vary
}
func redirectHTTPToHTTPS(w http.ResponseWriter, r *http.Request) {
if r.Host == "" {
http.Error(w, "Not Found", http.StatusNotFound)
}
url := r.URL
url.Host = r.Host
url.Scheme = "https"
http.Redirect(w, r, url.String(), http.StatusFound)
}
func StartServer() {
l4g.Info(utils.T("api.server.start_server.starting.info"))
var handler http.Handler = &CorsWrapper{Srv.Router}
if *utils.Cfg.RateLimitSettings.Enable {
l4g.Info(utils.T("api.server.start_server.rate.info"))
store, err := memstore.New(utils.Cfg.RateLimitSettings.MemoryStoreSize)
if err != nil {
l4g.Critical(utils.T("api.server.start_server.rate_limiting_memory_store"))
return
}
quota := throttled.RateQuota{
MaxRate: throttled.PerSec(utils.Cfg.RateLimitSettings.PerSec),
MaxBurst: *utils.Cfg.RateLimitSettings.MaxBurst,
}
rateLimiter, err := throttled.NewGCRARateLimiter(store, quota)
if err != nil {
l4g.Critical(utils.T("api.server.start_server.rate_limiting_rate_limiter"))
return
}
httpRateLimiter := throttled.HTTPRateLimiter{
RateLimiter: rateLimiter,
VaryBy: &VaryBy{},
DeniedHandler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
l4g.Error("%v: Denied due to throttling settings code=429 ip=%v", r.URL.Path, GetIpAddress(r))
throttled.DefaultDeniedHandler.ServeHTTP(w, r)
}),
}
handler = httpRateLimiter.RateLimit(handler)
}
Srv.GracefulServer = &graceful.Server{
Timeout: TIME_TO_WAIT_FOR_CONNECTIONS_TO_CLOSE_ON_SERVER_SHUTDOWN,
Server: &http.Server{
Addr: utils.Cfg.ServiceSettings.ListenAddress,
Handler: handlers.RecoveryHandler(handlers.PrintRecoveryStack(true))(handler),
ReadTimeout: time.Duration(*utils.Cfg.ServiceSettings.ReadTimeout) * time.Second,
WriteTimeout: time.Duration(*utils.Cfg.ServiceSettings.WriteTimeout) * time.Second,
},
}
l4g.Info(utils.T("api.server.start_server.listening.info"), utils.Cfg.ServiceSettings.ListenAddress)
if *utils.Cfg.ServiceSettings.Forward80To443 {
go func() {
listener, err := net.Listen("tcp", ":80")
if err != nil {
l4g.Error("Unable to setup forwarding")
return
}
defer listener.Close()
http.Serve(listener, http.HandlerFunc(redirectHTTPToHTTPS))
}()
}
go func() {
var err error
if *utils.Cfg.ServiceSettings.ConnectionSecurity == model.CONN_SECURITY_TLS {
if *utils.Cfg.ServiceSettings.UseLetsEncrypt {
var m letsencrypt.Manager
m.CacheFile(*utils.Cfg.ServiceSettings.LetsEncryptCertificateCacheFile)
tlsConfig := &tls.Config{
GetCertificate: m.GetCertificate,
}
tlsConfig.NextProtos = append(tlsConfig.NextProtos, "h2")
err = Srv.GracefulServer.ListenAndServeTLSConfig(tlsConfig)
} else {
err = Srv.GracefulServer.ListenAndServeTLS(*utils.Cfg.ServiceSettings.TLSCertFile, *utils.Cfg.ServiceSettings.TLSKeyFile)
}
} else {
err = Srv.GracefulServer.ListenAndServe()
}
if err != nil {
l4g.Critical(utils.T("api.server.start_server.starting.critical"), err)
time.Sleep(time.Second)
}
}()
}
func StopServer() {
l4g.Info(utils.T("api.server.stop_server.stopping.info"))
Srv.GracefulServer.Stop(TIME_TO_WAIT_FOR_CONNECTIONS_TO_CLOSE_ON_SERVER_SHUTDOWN)
Srv.Store.Close()
HubStop()
l4g.Info(utils.T("api.server.stop_server.stopped.info"))
}
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