forked from centrifugal/centrifugo
/
main.go
1212 lines (1059 loc) · 34.8 KB
/
main.go
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package main
import (
"bytes"
"context"
"crypto/tls"
"errors"
"fmt"
"html/template"
"io/ioutil"
"net"
"net/http"
"net/http/pprof"
"net/url"
"os"
"os/signal"
"path/filepath"
"runtime"
"strconv"
"strings"
"sync"
"syscall"
"time"
"github.com/centrifugal/centrifugo/internal/admin"
"github.com/centrifugal/centrifugo/internal/api"
"github.com/centrifugal/centrifugo/internal/graphite"
"github.com/centrifugal/centrifugo/internal/middleware"
"github.com/centrifugal/centrifugo/internal/webui"
"github.com/FZambia/viper-lite"
"github.com/centrifugal/centrifuge"
"github.com/mattn/go-isatty"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/satori/go.uuid"
"github.com/spf13/cobra"
"golang.org/x/crypto/acme/autocert"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials"
)
// VERSION of Centrifugo server. Set on build stage.
var VERSION string
func main() {
var configFile string
var rootCmd = &cobra.Command{
Use: "",
Short: "Centrifugo",
Long: "Centrifugo – real-time messaging server",
Run: func(cmd *cobra.Command, args []string) {
for k, v := range configDefaults {
viper.SetDefault(k, v)
}
bindEnvs := []string{
"engine", "debug", "secret", "publish", "subscribe_to_publish", "anonymous",
"join_leave", "presence", "history_recover", "history_size", "history_lifetime",
"client_insecure", "api_insecure", "admin", "admin_password", "admin_secret",
"admin_insecure", "redis_host", "redis_port", "redis_url",
}
for _, env := range bindEnvs {
viper.BindEnv(env)
}
bindPFlags := []string{
"engine", "log_level", "log_file", "pid_file", "debug", "name", "admin",
"client_insecure", "admin_insecure", "api_insecure", "port",
"address", "tls", "tls_cert", "tls_key", "internal_port", "prometheus",
"redis_host", "redis_port", "redis_password", "redis_db", "redis_url",
"redis_master_name", "redis_sentinels", "grpc_api",
}
for _, flag := range bindPFlags {
viper.BindPFlag(flag, cmd.Flags().Lookup(flag))
}
viper.SetConfigFile(configFile)
absConfPath, err := filepath.Abs(configFile)
if err != nil {
log.Fatal().Msgf("Error retreiving config file absolute path: %v", err)
}
err = viper.ReadInConfig()
configFound := true
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
log.Fatal().Msgf("Error parsing configuration: %s\n", err)
default:
configFound = false
}
}
file := setupLogging()
if file != nil {
defer file.Close()
}
err = writePidFile(viper.GetString("pid_file"))
if err != nil {
log.Fatal().Msgf("Error writing PID: %v", err)
}
if !configFound {
log.Warn().Msg("No config file found")
}
if os.Getenv("GOMAXPROCS") == "" {
if viper.IsSet("gomaxprocs") && viper.GetInt("gomaxprocs") > 0 {
runtime.GOMAXPROCS(viper.GetInt("gomaxprocs"))
} else {
runtime.GOMAXPROCS(runtime.NumCPU())
}
}
c := nodeConfig()
err = c.Validate()
if err != nil {
log.Fatal().Msgf("Error validating config: %v", err)
}
node, err := centrifuge.New(*c)
if err != nil {
log.Fatal().Msgf("Error creating Centrifuge Node: %v", err)
}
setLogHandler(node)
engineName := viper.GetString("engine")
var e centrifuge.Engine
if engineName == "memory" {
e, err = memoryEngine(node)
} else if engineName == "redis" {
e, err = redisEngine(node)
} else {
log.Fatal().Msgf("Unknown engine: %s", engineName)
}
if err != nil {
log.Fatal().Msgf("Error creating engine: %v", err)
}
node.SetEngine(e)
if err = node.Run(); err != nil {
log.Fatal().Msgf("Error running node: %v", err)
}
version := VERSION
if version == "" {
version = "dev"
}
log.Info().Msgf("starting Centrifugo %s (%s)", version, runtime.Version())
log.Info().Msgf("config path: %s", absConfPath)
log.Info().Msgf("pid: %d", os.Getpid())
log.Info().Msgf("engine: %s", strings.Title(engineName))
log.Info().Msgf("gomaxprocs: %d", runtime.GOMAXPROCS(0))
if viper.GetBool("client_insecure") {
log.Warn().Msg("INSECURE client mode enabled")
}
if viper.GetBool("api_insecure") {
log.Warn().Msg("INSECURE API mode enabled")
}
if viper.GetBool("admin_insecure") {
log.Warn().Msg("INSECURE admin mode enabled")
}
if viper.GetBool("debug") {
log.Warn().Msg("DEBUG mode enabled, see /debug/pprof")
}
var grpcAPIServer *grpc.Server
var grpcAPIAddr string
if viper.GetBool("grpc_api") {
grpcAPIAddr = fmt.Sprintf(":%d", viper.GetInt("grpc_api_port"))
grpcAPIConn, err := net.Listen("tcp", grpcAPIAddr)
if err != nil {
log.Fatal().Msgf("cannot listen to address %s", grpcAPIAddr)
}
grpcOpts := []grpc.ServerOption{}
tlsConfig, err := getTLSConfig()
if err != nil {
log.Fatal().Msgf("error getting TLS config: %v", err)
}
if tlsConfig != nil {
grpcOpts = append(grpcOpts, grpc.Creds(credentials.NewTLS(tlsConfig)))
}
grpcAPIServer = grpc.NewServer(grpcOpts...)
api.RegisterGRPCServerAPI(node, grpcAPIServer, api.GRPCAPIServiceConfig{})
go func() {
if err := grpcAPIServer.Serve(grpcAPIConn); err != nil {
log.Fatal().Msgf("serve GRPC: %v", err)
}
}()
}
if grpcAPIServer != nil {
log.Info().Msgf("serving GRPC API service on %s", grpcAPIAddr)
}
servers, err := runHTTPServers(node)
if err != nil {
log.Fatal().Msgf("error running HTTP server: %v", err)
}
if viper.GetBool("graphite") {
go func() {
bridge, err := graphite.NewBridge(&graphite.Config{
URL: net.JoinHostPort(viper.GetString("graphite_host"), strconv.Itoa(viper.GetInt("graphite_port"))),
Gatherer: prometheus.DefaultGatherer,
Prefix: viper.GetString("graphite_prefix") + graphite.ReplaceInvalidRunes(c.Name) + ".",
Interval: 60 * time.Second,
CountersAsDelta: true,
})
if err != nil {
log.Fatal().Msgf("error building Graphite bridge: %v", err)
}
err = bridge.Push()
if err != nil {
log.Fatal().Msgf("error pushing initial metrics to Graphite: %v", err)
}
bridge.Run(context.Background())
}()
}
handleSignals(node, servers, grpcAPIServer)
},
}
rootCmd.Flags().StringVarP(&configFile, "config", "c", "config.json", "path to config file")
rootCmd.Flags().StringP("engine", "e", "memory", "engine to use: memory or redis")
rootCmd.Flags().StringP("log_level", "", "info", "set the log level: debug, info, error, fatal or none")
rootCmd.Flags().StringP("log_file", "", "", "optional log file - if not specified logs go to STDOUT")
rootCmd.Flags().StringP("pid_file", "", "", "optional path to create PID file")
rootCmd.Flags().StringP("name", "n", "", "unique node name")
rootCmd.Flags().BoolP("debug", "", false, "enable debug endpoints")
rootCmd.Flags().BoolP("admin", "", false, "enable admin web interface")
rootCmd.Flags().BoolP("prometheus", "", false, "enable Prometheus metrics endpoint")
rootCmd.Flags().BoolP("client_insecure", "", false, "start in insecure client mode")
rootCmd.Flags().BoolP("api_insecure", "", false, "use insecure API mode")
rootCmd.Flags().BoolP("admin_insecure", "", false, "use insecure admin mode – no auth required for admin socket")
rootCmd.Flags().BoolP("tls", "", false, "enable TLS, requires an X509 certificate and a key file")
rootCmd.Flags().StringP("tls_cert", "", "", "path to an X509 certificate file")
rootCmd.Flags().StringP("tls_key", "", "", "path to an X509 certificate key")
rootCmd.Flags().StringP("address", "a", "", "interface address to listen on")
rootCmd.Flags().StringP("port", "p", "8000", "port to bind HTTP server to")
rootCmd.Flags().StringP("internal_port", "", "", "custom port for internal endpoints")
rootCmd.Flags().BoolP("grpc_api", "", false, "enable GRPC API server")
rootCmd.Flags().StringP("redis_host", "", "127.0.0.1", "Redis host (Redis engine)")
rootCmd.Flags().StringP("redis_port", "", "6379", "Redis port (Redis engine)")
rootCmd.Flags().StringP("redis_password", "", "", "Redis auth password (Redis engine)")
rootCmd.Flags().IntP("redis_db", "", 0, "Redis database (Redis engine)")
rootCmd.Flags().StringP("redis_url", "", "", "Redis connection URL in format redis://:password@hostname:port/db (Redis engine)")
rootCmd.Flags().StringP("redis_master_name", "", "", "name of Redis master Sentinel monitors (Redis engine)")
rootCmd.Flags().StringP("redis_sentinels", "", "", "comma-separated list of Sentinel addresses (Redis engine)")
viper.SetEnvPrefix("centrifugo")
var versionCmd = &cobra.Command{
Use: "version",
Short: "Centrifugo version information",
Long: `Print the version information of Centrifugo`,
Run: func(cmd *cobra.Command, args []string) {
fmt.Printf("Centrifugo v%s (Go version: %s)\n", VERSION, runtime.Version())
},
}
var checkConfigFile string
var checkConfigCmd = &cobra.Command{
Use: "checkconfig",
Short: "Check configuration file",
Long: `Check Centrifugo configuration file`,
Run: func(cmd *cobra.Command, args []string) {
err := validateConfig(checkConfigFile)
if err != nil {
log.Fatal().Msgf("%v", err)
}
},
}
checkConfigCmd.Flags().StringVarP(&checkConfigFile, "config", "c", "config.json", "path to config file to check")
var outputConfigFile string
var generateConfigCmd = &cobra.Command{
Use: "genconfig",
Short: "Generate simple configuration file to start with",
Long: `Generate simple configuration file to start with`,
Run: func(cmd *cobra.Command, args []string) {
err := generateConfig(outputConfigFile)
if err != nil {
log.Fatal().Msgf("%v", err)
}
},
}
generateConfigCmd.Flags().StringVarP(&outputConfigFile, "config", "c", "config.json", "path to output config file")
rootCmd.AddCommand(versionCmd)
rootCmd.AddCommand(checkConfigCmd)
rootCmd.AddCommand(generateConfigCmd)
rootCmd.Execute()
}
var configDefaults = map[string]interface{}{
"gomaxprocs": 0,
"engine": "memory",
"name": "",
"secret": "",
"publish": false,
"subscribe_to_publish": false,
"anonymous": false,
"presence": false,
"history_size": 0,
"history_lifetime": 0,
"history_recover": false,
"namespaces": "",
"node_ping_interval": 3,
"client_ping_interval": 25,
"client_expired_close_delay": 25,
"client_expired_sub_close_delay": 25,
"client_stale_close_delay": 25,
"client_message_write_timeout": 0,
"client_channel_limit": 128,
"client_request_max_size": 65536, // 64KB
"client_queue_max_size": 10485760, // 10MB
"client_presence_ping_interval": 25,
"client_presence_expire_interval": 60,
"client_user_connection_limit": 0,
"channel_max_length": 255,
"channel_private_prefix": "$",
"channel_namespace_boundary": ":",
"channel_user_boundary": "#",
"channel_user_separator": ",",
"debug": false,
"prometheus": false,
"admin": false,
"admin_password": "",
"admin_secret": "",
"admin_insecure": false,
"admin_web_path": "",
"sockjs_url": "//cdn.jsdelivr.net/sockjs/1.1/sockjs.min.js",
"sockjs_heartbeat_delay": 25,
"websocket_compression": false,
"websocket_compression_min_size": 0,
"websocket_compression_level": 1,
"websocket_read_buffer_size": 0,
"websocket_write_buffer_size": 0,
"tls_autocert": false,
"tls_autocert_host_whitelist": "",
"tls_autocert_cache_dir": "",
"tls_autocert_email": "",
"tls_autocert_force_rsa": false,
"tls_autocert_server_name": "",
"tls_autocert_http": false,
"tls_autocert_http_addr": ":80",
"redis_prefix": "centrifugo",
"redis_connect_timeout": 1,
"redis_read_timeout": 10, // Must be greater than ping channel publish interval.
"redis_write_timeout": 1,
"redis_idle_timeout": 0,
"redis_pubsub_num_workers": 0,
"grpc_api": false,
"grpc_api_port": 10000,
"shutdown_timeout": 30,
"shutdown_termination_delay": 1,
"graphite": false,
"graphite_host": "localhost",
"graphite_port": 2003,
"graphite_prefix": "centrifugo.",
}
func writePidFile(pidFile string) error {
if pidFile == "" {
return nil
}
pid := []byte(strconv.Itoa(os.Getpid()) + "\n")
return ioutil.WriteFile(pidFile, pid, 0644)
}
var logLevelMatches = map[string]zerolog.Level{
"NONE": zerolog.NoLevel,
"DEBUG": zerolog.DebugLevel,
"INFO": zerolog.InfoLevel,
"WARN": zerolog.WarnLevel,
"ERROR": zerolog.ErrorLevel,
"FATAL": zerolog.FatalLevel,
}
func setupLogging() *os.File {
if isatty.IsTerminal(os.Stdout.Fd()) && runtime.GOOS != "windows" {
log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stdout})
}
zerolog.SetGlobalLevel(zerolog.InfoLevel)
logLevel, ok := logLevelMatches[strings.ToUpper(viper.GetString("log_level"))]
if !ok {
logLevel = zerolog.InfoLevel
}
zerolog.SetGlobalLevel(logLevel)
if viper.IsSet("log_file") && viper.GetString("log_file") != "" {
f, err := os.OpenFile(viper.GetString("log_file"), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
if err != nil {
log.Fatal().Msgf("error opening log file: %v", err)
}
log.Logger = log.Output(f)
return f
}
return nil
}
func handleSignals(n *centrifuge.Node, httpServers []*http.Server, grpcAPIServer *grpc.Server) {
sigc := make(chan os.Signal, 1)
signal.Notify(sigc, syscall.SIGHUP, syscall.SIGINT, os.Interrupt, syscall.SIGTERM)
for {
sig := <-sigc
log.Info().Msgf("signal received: %v", sig)
switch sig {
case syscall.SIGHUP:
// reload application configuration on SIGHUP.
log.Info().Msg("reloading configuration")
err := viper.ReadInConfig()
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
log.Error().Msgf("error parsing configuration: %s", err)
continue
default:
log.Error().Msg("no config file found")
continue
}
}
cfg := nodeConfig()
if err := n.Reload(*cfg); err != nil {
log.Error().Msgf("error reloading: %v", err)
continue
}
log.Info().Msg("configuration successfully reloaded")
case syscall.SIGINT, os.Interrupt, syscall.SIGTERM:
log.Info().Msg("shutting down, wait...")
pidFile := viper.GetString("pid_file")
shutdownTimeout := time.Duration(viper.GetInt("shutdown_timeout")) * time.Second
go time.AfterFunc(shutdownTimeout, func() {
if pidFile != "" {
os.Remove(pidFile)
}
os.Exit(1)
})
var wg sync.WaitGroup
if grpcAPIServer != nil {
wg.Add(1)
go func() {
defer wg.Done()
grpcAPIServer.GracefulStop()
}()
}
ctx, cancel := context.WithTimeout(context.Background(), shutdownTimeout)
defer cancel()
for _, srv := range httpServers {
wg.Add(1)
go func(srv *http.Server) {
defer wg.Done()
srv.Shutdown(ctx)
}(srv)
}
n.Shutdown(ctx)
wg.Wait()
if pidFile != "" {
os.Remove(pidFile)
}
time.Sleep(time.Duration(viper.GetInt("shutdown_termination_delay")) * time.Second)
os.Exit(0)
}
}
}
func getTLSConfig() (*tls.Config, error) {
tlsEnabled := viper.GetBool("tls")
tlsCert := viper.GetString("tls_cert")
tlsKey := viper.GetString("tls_key")
tlsAutocertEnabled := viper.GetBool("tls_autocert")
autocertHostWhitelist := viper.GetString("tls_autocert_host_whitelist")
var tlsAutocertHostWhitelist []string
if autocertHostWhitelist != "" {
tlsAutocertHostWhitelist = strings.Split(autocertHostWhitelist, ",")
} else {
tlsAutocertHostWhitelist = nil
}
tlsAutocertCacheDir := viper.GetString("tls_autocert_cache_dir")
tlsAutocertEmail := viper.GetString("tls_autocert_email")
tlsAutocertForceRSA := viper.GetBool("tls_autocert_force_rsa")
tlsAutocertServerName := viper.GetString("tls_autocert_server_name")
tlsAutocertHTTP := viper.GetBool("tls_autocert_http")
tlsAutocertHTTPAddr := viper.GetString("tls_autocert_http_addr")
if tlsAutocertEnabled {
certManager := autocert.Manager{
Prompt: autocert.AcceptTOS,
ForceRSA: tlsAutocertForceRSA,
Email: tlsAutocertEmail,
}
if tlsAutocertHostWhitelist != nil {
certManager.HostPolicy = autocert.HostWhitelist(tlsAutocertHostWhitelist...)
}
if tlsAutocertCacheDir != "" {
certManager.Cache = autocert.DirCache(tlsAutocertCacheDir)
}
if tlsAutocertHTTP {
acmeHTTPserver := &http.Server{
Handler: certManager.HTTPHandler(nil),
Addr: tlsAutocertHTTPAddr,
}
go func() {
log.Info().Msgf("serving ACME http_01 challenge on %s", tlsAutocertHTTPAddr)
if err := acmeHTTPserver.ListenAndServe(); err != nil {
log.Fatal().Msgf("can't create server on %s to serve acme http challenge: %v", tlsAutocertHTTPAddr, err)
}
}()
}
return &tls.Config{
GetCertificate: func(hello *tls.ClientHelloInfo) (*tls.Certificate, error) {
// See https://github.com/centrifugal/centrifugo/issues/144#issuecomment-279393819
if tlsAutocertServerName != "" && hello.ServerName == "" {
hello.ServerName = tlsAutocertServerName
}
return certManager.GetCertificate(hello)
},
}, nil
} else if tlsEnabled {
// Autocert disabled - just try to use provided SSL cert and key files.
tlsConfig := &tls.Config{}
tlsConfig = tlsConfig.Clone()
tlsConfig.Certificates = make([]tls.Certificate, 1)
var err error
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair(tlsCert, tlsKey)
if err != nil {
return nil, err
}
return tlsConfig, nil
}
return nil, nil
}
func runHTTPServers(n *centrifuge.Node) ([]*http.Server, error) {
debug := viper.GetBool("debug")
admin := viper.GetBool("admin")
prometheus := viper.GetBool("prometheus")
httpAddress := viper.GetString("address")
httpPort := viper.GetString("port")
httpInternalPort := viper.GetString("internal_port")
if httpInternalPort == "" {
httpInternalPort = httpPort
}
// portToHandlerFlags contains mapping between ports and handler flags
// to serve on this port.
portToHandlerFlags := map[string]HandlerFlag{}
var portFlags HandlerFlag
portFlags = portToHandlerFlags[httpPort]
portFlags |= HandlerWebsocket | HandlerSockJS
portToHandlerFlags[httpPort] = portFlags
portFlags = portToHandlerFlags[httpInternalPort]
portFlags |= HandlerAPI
if admin {
portFlags |= HandlerAdmin
}
if prometheus {
portFlags |= HandlerPrometheus
}
if debug {
portFlags |= HandlerDebug
}
portToHandlerFlags[httpInternalPort] = portFlags
servers := []*http.Server{}
// Iterate over port to flags mapping and start HTTP servers
// on separate ports serving handlers specified in flags.
for handlerPort, handlerFlags := range portToHandlerFlags {
if handlerFlags == 0 {
continue
}
mux := Mux(n, handlerFlags)
addr := net.JoinHostPort(httpAddress, handlerPort)
log.Info().Msgf("serving %s endpoints on %s", handlerFlags, addr)
tlsConfig, err := getTLSConfig()
if err != nil {
log.Fatal().Msgf("can not get TLS config: %v", err)
}
server := &http.Server{
Addr: addr,
Handler: mux,
TLSConfig: tlsConfig,
}
servers = append(servers, server)
go func() {
if tlsConfig != nil {
if err := server.ListenAndServeTLS("", ""); err != nil {
if err != http.ErrServerClosed {
log.Fatal().Msgf("ListenAndServe: %v", err)
}
}
} else {
if err := server.ListenAndServe(); err != nil {
if err != http.ErrServerClosed {
log.Fatal().Msgf("ListenAndServe: %v", err)
}
}
}
}()
}
return servers, nil
}
// pathExists returns whether the given file or directory exists or not
func pathExists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return false, err
}
var jsonConfigTemplate = `{
"secret": "{{.Secret}}",
"admin_password": "{{.AdminPassword}}",
"admin_secret": "{{.AdminSecret}}"
}
`
var tomlConfigTemplate = `secret = {{.Secret}}
admin_password = {{.AdminPassword}}
admin_secret = {{.AdminSecret}}
`
var yamlConfigTemplate = `secret: {{.Secret}}
admin_password: {{.AdminPassword}}
admin_secret: {{.AdminSecret}}
`
// generateConfig generates configuration file at provided path.
func generateConfig(f string) error {
exists, err := pathExists(f)
if err != nil {
return err
}
if exists {
return errors.New("output config file already exists: " + f)
}
ext := filepath.Ext(f)
if len(ext) > 1 {
ext = ext[1:]
}
supportedExts := []string{"json", "toml", "yaml", "yml"}
if !stringInSlice(ext, supportedExts) {
return errors.New("output config file must have one of supported extensions: " + strings.Join(supportedExts, ", "))
}
var t *template.Template
switch ext {
case "json":
t, err = template.New("config").Parse(jsonConfigTemplate)
case "toml":
t, err = template.New("config").Parse(tomlConfigTemplate)
case "yaml", "yml":
t, err = template.New("config").Parse(yamlConfigTemplate)
}
if err != nil {
return err
}
var output bytes.Buffer
t.Execute(&output, struct {
Secret string
AdminPassword string
AdminSecret string
}{
uuid.NewV4().String(),
uuid.NewV4().String(),
uuid.NewV4().String(),
})
err = ioutil.WriteFile(f, output.Bytes(), 0644)
if err != nil {
return err
}
err = validateConfig(f)
if err != nil {
_ = os.Remove(f)
return err
}
return nil
}
// validateConfig validates config file located at provided path.
func validateConfig(f string) error {
v := viper.New()
v.SetConfigFile(f)
err := v.ReadInConfig()
if err != nil {
switch err.(type) {
case viper.ConfigParseError:
return err
default:
return errors.New("unable to locate config file, use \"centrifugo genconfig -c " + f + "\" command to generate one")
}
}
c := nodeConfig()
return c.Validate()
}
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func nodeConfig() *centrifuge.Config {
v := viper.GetViper()
cfg := ¢rifuge.Config{}
cfg.Version = VERSION
cfg.Name = applicationName()
cfg.Secret = v.GetString("secret")
cfg.Publish = v.GetBool("publish")
cfg.SubscribeToPublish = v.GetBool("subscribe_to_publish")
cfg.Anonymous = v.GetBool("anonymous")
cfg.Presence = v.GetBool("presence")
cfg.JoinLeave = v.GetBool("join_leave")
cfg.HistorySize = v.GetInt("history_size")
cfg.HistoryLifetime = v.GetInt("history_lifetime")
cfg.HistoryRecover = v.GetBool("history_recover")
cfg.Namespaces = namespacesFromConfig(v)
cfg.ChannelMaxLength = v.GetInt("channel_max_length")
cfg.ChannelPrivatePrefix = v.GetString("channel_private_prefix")
cfg.ChannelNamespaceBoundary = v.GetString("channel_namespace_boundary")
cfg.ChannelUserBoundary = v.GetString("channel_user_boundary")
cfg.ChannelUserSeparator = v.GetString("channel_user_separator")
cfg.ClientPresencePingInterval = time.Duration(v.GetInt("client_presence_ping_interval")) * time.Second
cfg.ClientPresenceExpireInterval = time.Duration(v.GetInt("client_presence_expire_interval")) * time.Second
cfg.ClientPingInterval = time.Duration(v.GetInt("client_ping_interval")) * time.Second
cfg.ClientMessageWriteTimeout = time.Duration(v.GetInt("client_message_write_timeout")) * time.Second
cfg.ClientInsecure = v.GetBool("client_insecure")
cfg.ClientExpiredCloseDelay = time.Duration(v.GetInt("client_expired_close_delay")) * time.Second
cfg.ClientExpiredSubCloseDelay = time.Duration(v.GetInt("client_expired_sub_close_delay")) * time.Second
cfg.ClientStaleCloseDelay = time.Duration(v.GetInt("client_stale_close_delay")) * time.Second
cfg.ClientRequestMaxSize = v.GetInt("client_request_max_size")
cfg.ClientQueueMaxSize = v.GetInt("client_queue_max_size")
cfg.ClientChannelLimit = v.GetInt("client_channel_limit")
cfg.ClientUserConnectionLimit = v.GetInt("client_user_connection_limit")
return cfg
}
// applicationName returns a name for this centrifuge. If no name provided
// in configuration then it constructs node name based on hostname and port
func applicationName() string {
v := viper.GetViper()
name := v.GetString("name")
if name != "" {
return name
}
port := v.GetString("port")
var hostname string
hostname, err := os.Hostname()
if err != nil {
hostname = "?"
}
return hostname + "_" + port
}
// namespacesFromConfig allows to unmarshal channel namespaces.
func namespacesFromConfig(v *viper.Viper) []centrifuge.ChannelNamespace {
ns := []centrifuge.ChannelNamespace{}
if !v.IsSet("namespaces") {
return ns
}
v.UnmarshalKey("namespaces", &ns)
return ns
}
func websocketHandlerConfig() centrifuge.WebsocketConfig {
v := viper.GetViper()
cfg := centrifuge.WebsocketConfig{}
cfg.Compression = v.GetBool("websocket_compression")
cfg.CompressionLevel = v.GetInt("websocket_compression_level")
cfg.CompressionMinSize = v.GetInt("websocket_compression_min_size")
cfg.ReadBufferSize = v.GetInt("websocket_read_buffer_size")
cfg.WriteBufferSize = v.GetInt("websocket_write_buffer_size")
return cfg
}
func sockjsHandlerConfig() centrifuge.SockjsConfig {
v := viper.GetViper()
cfg := centrifuge.SockjsConfig{}
cfg.URL = v.GetString("sockjs_url")
cfg.HeartbeatDelay = time.Duration(v.GetInt("sockjs_heartbeat_delay")) * time.Second
cfg.WebsocketReadBufferSize = v.GetInt("websocket_read_buffer_size")
cfg.WebsocketWriteBufferSize = v.GetInt("websocket_write_buffer_size")
return cfg
}
func adminHandlerConfig() admin.Config {
v := viper.GetViper()
cfg := admin.Config{}
cfg.WebFS = webui.FS
cfg.WebPath = v.GetString("admin_web_path")
cfg.Password = v.GetString("admin_password")
cfg.Secret = v.GetString("admin_secret")
cfg.Insecure = v.GetBool("admin_insecure")
return cfg
}
func memoryEngine(n *centrifuge.Node) (centrifuge.Engine, error) {
c, err := memoryEngineConfig()
if err != nil {
return nil, err
}
return centrifuge.NewMemoryEngine(n, *c)
}
func redisEngine(n *centrifuge.Node) (centrifuge.Engine, error) {
c, err := redisEngineConfig()
if err != nil {
return nil, err
}
return centrifuge.NewRedisEngine(n, *c)
}
func memoryEngineConfig() (*centrifuge.MemoryEngineConfig, error) {
return ¢rifuge.MemoryEngineConfig{}, nil
}
func redisEngineConfig() (*centrifuge.RedisEngineConfig, error) {
v := viper.GetViper()
numShards := 1
hostsConf := v.GetString("redis_host")
portsConf := v.GetString("redis_port")
urlsConf := v.GetString("redis_url")
masterNamesConf := v.GetString("redis_master_name")
sentinelsConf := v.GetString("redis_sentinels")
password := v.GetString("redis_password")
db := v.GetInt("redis_db")
hosts := []string{}
if hostsConf != "" {
hosts = strings.Split(hostsConf, ",")
if len(hosts) > numShards {
numShards = len(hosts)
}
}
ports := []string{}
if portsConf != "" {
ports = strings.Split(portsConf, ",")
if len(ports) > numShards {
numShards = len(ports)
}
}
urls := []string{}
if urlsConf != "" {
urls = strings.Split(urlsConf, ",")
if len(urls) > numShards {
numShards = len(urls)
}
}
masterNames := []string{}
if masterNamesConf != "" {
masterNames = strings.Split(masterNamesConf, ",")
if len(masterNames) > numShards {
numShards = len(masterNames)
}
}
if masterNamesConf != "" && sentinelsConf == "" {
return nil, fmt.Errorf("provide at least one Sentinel address")
}
if masterNamesConf != "" && len(masterNames) < numShards {
return nil, fmt.Errorf("Redis master name must be set for every Redis shard when Sentinel used")
}
sentinelAddrs := []string{}
if sentinelsConf != "" {
for _, addr := range strings.Split(sentinelsConf, ",") {
addr := strings.TrimSpace(addr)
if addr == "" {
continue
}
if _, _, err := net.SplitHostPort(addr); err != nil {
return nil, fmt.Errorf("malformed Sentinel address: %s", addr)
}
sentinelAddrs = append(sentinelAddrs, addr)
}
}
if len(hosts) <= 1 {
newHosts := make([]string, numShards)
for i := 0; i < numShards; i++ {
if len(hosts) == 0 {
newHosts[i] = ""
} else {
newHosts[i] = hosts[0]
}
}
hosts = newHosts
} else if len(hosts) != numShards {
return nil, fmt.Errorf("malformed sharding configuration: wrong number of redis hosts")
}
if len(ports) <= 1 {
newPorts := make([]string, numShards)
for i := 0; i < numShards; i++ {
if len(ports) == 0 {
newPorts[i] = ""
} else {
newPorts[i] = ports[0]
}
}
ports = newPorts
} else if len(ports) != numShards {
return nil, fmt.Errorf("malformed sharding configuration: wrong number of redis ports")
}
if len(urls) > 0 && len(urls) != numShards {
return nil, fmt.Errorf("malformed sharding configuration: wrong number of redis urls")
}
if len(masterNames) == 0 {
newMasterNames := make([]string, numShards)
for i := 0; i < numShards; i++ {
newMasterNames[i] = ""
}
masterNames = newMasterNames
}
passwords := make([]string, numShards)
for i := 0; i < numShards; i++ {
passwords[i] = password
}
dbs := make([]int, numShards)