add counter and logging for debuging tweaks

counter.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"strconv"
+	"sync"
+)
+
+type Counter struct {
+	count int
+	lock sync.Mutex
+}
+
+func NewCounter() *Counter {
+	return &Counter{count: 0}
+}
+
+func (c *Counter) Add() {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	c.count += 1
+}
+
+func (c *Counter) Sub() {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	c.count -= 1
+}
+
+func (c *Counter) String() string {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+	return strconv.Itoa(c.count)
+}

main.go

@@ -18,6 +18,7 @@ const SameCookieTimeLimitMins = 10
 type Ip2LastSeen map[string]time.Time
 
 var cookiesToIps sync.Map // map [ cookie string] Ip2LastSeen
+var counter *Counter
 
 func main() {
 	var listenPort = flag.Int("listenPort", 5999, "port to listen on for incoming HTTP connections")
@@ -35,12 +36,20 @@ func main() {
 	}
 	log.Infof("Starting ddosFilter on %v -> %v...\n", *listenPort, *proxyPort)
 
-
+	counter = NewCounter()
+	go logger()
 	listen(*listenPort, *proxyPort)
 }
 
+func logger() {
+	for {
+		time.Sleep(5*time.Second)
+		log.Infof("Thread count: %v\n", counter.String())
+	}
+}
+
 func listen(listenPort, proxyPort int) {
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { filter(w, r, listenPort, proxyPort)})
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { counter.Add(); filter(w, r, listenPort, proxyPort); counter.Sub()})
 	addr := "127.0.0.1:" + strconv.Itoa(listenPort)
 	err := http.ListenAndServe(addr, nil)
 	if err != nil {
@@ -51,8 +60,9 @@ func listen(listenPort, proxyPort int) {
 
 func filter(res http.ResponseWriter, req *http.Request, listenPort, proxyPort int) {
 	ip := req.RemoteAddr
-	log.Debugf("%v: Request %v %v\n", ip, req.Host, req.URL)
+	//log.Debugf("%v: Request %v %v\n", ip, req.Host, req.URL)
 	cookie, err := req.Cookie("i_like_gogits")
+	log.Debugf("ip: %v cookie: %v\n", ip, cookie)
 	if err != nil {
 		pass(res, req, listenPort, proxyPort)
 		return
@@ -114,7 +124,7 @@ func copyHeader(source http.Header, dest *http.Header){
 }
 
 func pass(res http.ResponseWriter, req *http.Request, listenPort, proxyPort int) {
-	log.Debugf("Request pass to proxy")
+	//log.Debugf("Request pass to proxy")
 
 
 	//log.Infof("orig: %v\n", req.Host)
@@ -127,8 +137,7 @@ func pass(res http.ResponseWriter, req *http.Request, listenPort, proxyPort int)
 	//log.Infof("req: %v\n", req)
 
 	var transport http.Transport
-	resp, err := transport.RoundTrip(req) //rr)
-
+	resp, err := transport.RoundTrip(req)
 
 	if err != nil {
 		log.Errorf("Error fetching: %v\n", err.Error())