func main() {
if cfg.PrintVersion {
fmt.Println(conf.Version)
os.Exit(0)
}
// Can be passed to other modules
// as an internal metrics channel.
mchan := metchan.New(cfg)
mchan.Start()
// The store will be used by receivers and outlets.
var st store.Store
if len(cfg.RedisHost) > 0 {
redisStore := store.NewRedisStore(cfg)
redisStore.Mchan = mchan
st = redisStore
fmt.Printf("at=initialized-redis-store\n")
} else {
st = store.NewMemStore()
fmt.Printf("at=initialized-mem-store\n")
}
if cfg.UseOutlet {
rdr := reader.New(cfg, st)
rdr.Mchan = mchan
outlet := outlet.NewLibratoOutlet(cfg, rdr)
outlet.Mchan = mchan
outlet.Start()
}
if cfg.UsingReciever {
recv := receiver.NewReceiver(cfg, st)
recv.Mchan = mchan
recv.Start()
http.Handle("/logs", recv)
}
http.Handle("/health", st)
http.HandleFunc("/sign", auth.ServeHTTP)
e := http.ListenAndServe(fmt.Sprintf(":%d", cfg.Port), nil)
if e != nil {
log.Fatal("Unable to start HTTP server.")
}
fmt.Printf("at=l2met-initialized port=%d\n", cfg.Port)
}
func main() {
cfg = conf.New()
flag.Parse()
// Can be passed to other modules
// as an internal metrics channel.
mchan := metchan.New(cfg.Verbose, cfg.MetchanUrl)
mchan.Start()
// The store will be used by receivers and outlets.
var st store.Store
if len(cfg.RedisHost) > 0 {
redisStore := store.NewRedisStore(cfg)
redisStore.Mchan = mchan
st = redisStore
fmt.Printf("at=initialized-redis-store\n")
} else {
st = store.NewMemStore()
fmt.Printf("at=initialized-mem-store\n")
}
if cfg.UseOutlet {
rdr := reader.New(cfg, st)
rdr.Mchan = mchan
outlet := outlet.NewLibratoOutlet(cfg, rdr)
outlet.Mchan = mchan
outlet.Start()
}
if cfg.UsingReciever {
recv := receiver.NewReceiver(cfg, st)
recv.Mchan = mchan
recv.Start()
if cfg.Verbose {
go recv.Report()
}
http.HandleFunc("/logs",
func(w http.ResponseWriter, r *http.Request) {
startReceiveT := time.Now()
if r.Method != "POST" {
http.Error(w, "Invalid Request", 400)
return
}
user, pass, err := auth.ParseAndDecrypt(r)
if err != nil {
http.Error(w, "Invalid Request", 400)
return
}
b, err := ioutil.ReadAll(r.Body)
r.Body.Close()
if err != nil {
http.Error(w, "Invalid Request", 400)
return
}
v := r.URL.Query()
v.Add("user", user)
v.Add("password", pass)
recv.Receive(b, v)
mchan.Time("http.accept", startReceiveT)
})
}
// The only thing that constitutes a healthy l2met
// is the health of the store. In some cases, this might mean
// a Redis health check.
http.HandleFunc("/health",
func(w http.ResponseWriter, r *http.Request) {
ok := st.Health()
if !ok {
msg := "Store is unavailable."
fmt.Printf("error=%q\n", msg)
http.Error(w, msg, 500)
}
})
http.HandleFunc("/sign",
func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
http.Error(w, "Method must be POST.", 400)
return
}
l := r.Header.Get("Authorization")
user, _, err := auth.ParseRaw(l)
if err != nil {
http.Error(w, "Unable to parse headers.", 400)
return
}
matched := false
for i := range cfg.Secrets {
if user == cfg.Secrets[i] {
matched = true
break
}
}
if !matched {
http.Error(w, "Authentication failed.", 401)
return
}
b, err := ioutil.ReadAll(r.Body)
r.Body.Close()
if err != nil {
http.Error(w, "Unable to read body.", 400)
return
}
signed, err := auth.EncryptAndSign(b)
if err != nil {
http.Error(w, "Unable to sign body.", 500)
return
}
fmt.Fprint(w, string(signed))
})
// Start the HTTP server.
e := http.ListenAndServe(fmt.Sprintf(":%d", cfg.Port), nil)
if e != nil {
log.Fatal("Unable to start HTTP server.")
}
fmt.Printf("at=l2met-initialized port=%d\n", cfg.Port)
}