// -- main
func main() {
var configFile string
flag.StringVar(&configFile, "config", "config.ini", "Configuration File")
flag.Parse()
log.Printf("Using config %s", configFile)
config := util.MzGetConfig(configFile)
// Convert the token_key from base64 (if present)
if k, ok := config["token_key"]; ok {
key, _ := base64.URLEncoding.DecodeString(k.(string))
config["token_key"] = key
}
logger = util.NewHekaLogger(config)
simplepush.Clients = make(map[string]*simplepush.Client)
// Initialize the common server.
simplepush.InitServer(config, logger)
// Register the handlers
// each websocket gets it's own handler.
http.HandleFunc("/update/", makeHandler(simplepush.UpdateHandler))
http.HandleFunc("/status/", makeHandler(simplepush.StatusHandler))
http.Handle("/", websocket.Handler(simplepush.PushSocketHandler))
// Config the server
host := util.MzGet(config, "host", "localhost")
port := util.MzGet(config, "port", "8080")
// Hoist the main sail
logger.Info("main",
fmt.Sprintf("listening on %s:%s", host, port), nil)
err := http.ListenAndServe(fmt.Sprintf("%s:%s", host, port), nil)
if err != nil {
panic("ListenAndServe: " + err.Error())
}
}
// -- main
func main() {
var certFile string
var keyFile string
flag.Parse()
config := util.MzGetConfig(*configFile)
// The config file requires some customization and normalization
config = simplepush.FixConfig(config)
config["VERSION"] = VERSION
runtime.GOMAXPROCS(runtime.NumCPU())
// Report what the app believes the current host to be, and what version.
log.Printf("CurrentHost: %s, Version: %s",
config["shard.current_host"], VERSION)
// Metrics reporting
if mprefix, ok := config["metrics.prefix"]; ok {
simplepush.MetricsPrefix(mprefix.(string))
}
if mstatsd, ok := config["metrics.statsd_target"]; ok {
err := simplepush.MetricsStatsdTarget(mstatsd.(string))
if err != nil {
log.Fatal("Couldn't create statsd client: ", err)
}
}
// Only create profiles if requested. To view the application profiles,
// see http://blog.golang.org/profiling-go-programs
if *profile != "" {
log.Printf("Creating profile...")
f, err := os.Create(*profile)
if err != nil {
log.Fatal(err)
}
defer func() {
log.Printf("Closing profile...")
pprof.StopCPUProfile()
}()
pprof.StartCPUProfile(f)
}
if *memProfile != "" {
defer func() {
profFile, err := os.Create(*memProfile)
if err != nil {
log.Fatalln(err)
}
pprof.WriteHeapProfile(profFile)
profFile.Close()
}()
}
// Logging can be CPU intensive (note: variable reflection is VERY
// CPU intensive. Avoid things like log.Printf("%v", someStruct) )
// If logging is specified as a command line flag, it overrides the
// value specified in the config file. This allows short term logging
// for operations.
if *logging > 0 {
config["logger.enable"] = "1"
config["logger.filter"] = strconv.FormatInt(int64(*logging), 10)
}
if v, ok := config["logger.enable"]; ok {
if v, _ := strconv.ParseBool(v.(string)); v {
logger = util.NewHekaLogger(config)
logger.Info("main", "Enabling full logger", nil)
}
}
// Routing allows stand-alone instances to send updates between themselves.
// Websock does not allow for native redirects in some browsers. Routing
// allows websocket connections and updates to be handled by any server,
// with the approriate notification sent.
//
// Note: While this is fairly primative, it works. There are more efficient
// models and systems that could be used for this (e.g. 0mq, rabbit, etc.)
// however those also add additional complexity to the server system.
// Since this is mostly point-to-point (we know the host location to send
// to), there wasn't much justification to add that complexity.
// Obviously, this can and will change over time.
route = &router.Router{
Port: util.MzGet(config, "shard.port", "3000"),
Logger: logger,
}
defer func() {
if route != nil {
route.CloseAll()
}
}()
// Currently, we're opting for a memcache "storage" mechanism, however
// and key/value store would suffice. (bonus points if the records are
// self expiring.)
store = storage.New(config, logger)
// Initialize the common server.
simplepush.InitServer(config, logger)
handlers := simplepush.NewHandler(config, logger, store, route)
// Config the server
var wsport string
var wshost string
var WSMux *http.ServeMux = http.DefaultServeMux
var RESTMux *http.ServeMux = http.DefaultServeMux
host := util.MzGet(config, "host", "localhost")
port := util.MzGet(config, "port", "8080")
// Register the handlers
// each websocket gets it's own handler.
if util.MzGet(config, "wsport", port) != port {
wsport = util.MzGet(config, "wsport", port)
wshost = util.MzGet(config, "wshost", host)
WSMux = http.NewServeMux()
}
RESTMux.HandleFunc("/update/", handlers.UpdateHandler)
RESTMux.HandleFunc("/status/", handlers.StatusHandler)
RESTMux.HandleFunc("/realstatus/", handlers.RealStatusHandler)
RESTMux.HandleFunc("/metrics/", handlers.MetricsHandler)
WSMux.Handle("/", websocket.Handler(handlers.PushSocketHandler))
// Hoist the main sail.
if logger != nil {
logger.Info("main",
fmt.Sprintf("listening on %s:%s", host, port), nil)
}
// Get the (optional) SSL certs
if name, ok := config["ssl.certfile"]; ok {
certFile = name.(string)
}
if name, ok := config["ssl.keyfile"]; ok {
keyFile = name.(string)
}
wscertFile := util.MzGet(config, "ssl.ws.certfile", certFile)
wskeyFile := util.MzGet(config, "ssl.ws.keyfile", keyFile)
// wait for sigint
sigChan := make(chan os.Signal)
signal.Notify(sigChan, syscall.SIGINT, syscall.SIGHUP, SIGUSR1)
errChan := make(chan error)
// Weigh the anchor!
go func() {
addr := host + ":" + port
if len(certFile) > 0 && len(keyFile) > 0 {
if logger != nil {
logger.Info("main", "Using TLS", nil)
}
errChan <- http.ListenAndServeTLS(addr, certFile, keyFile, nil)
} else {
errChan <- http.ListenAndServe(addr, nil)
}
}()
// Oh, we have a different context for WebSockets. Weigh that anchor too!
if WSMux != RESTMux {
if logger != nil {
logger.Info("main", "Starting separate context for WS", nil)
logger.Info("main",
fmt.Sprintf("ws listen on %s:%s", wshost, wsport), nil)
}
go func() {
wsaddr := wshost + ":" + wsport
if len(wscertFile) > 0 && len(wskeyFile) > 0 {
errChan <- http.ListenAndServeTLS(wsaddr, wscertFile, wskeyFile, WSMux)
} else {
errChan <- http.ListenAndServe(wsaddr, WSMux)
}
}()
}
// And we're underway!
go route.HandleUpdates(updater)
select {
case err := <-errChan:
if err != nil {
panic("ListenAndServe: " + err.Error())
}
case <-sigChan:
if logger != nil {
logger.Info("main", "Recieved signal, shutting down.", nil)
}
route.CloseAll()
route = nil
}
}