clear cookie

crmpixel.go

 	return
 }
 
+//set to "" and make it expire
+func cookieClear(name string) (ret http.Cookie) {
+	expiration := time.Unix(0, 0) //Epoc
+	ret = http.Cookie{Name: name, Value: "", Expires: expiration}
+	return
+}
+
 func crmCreateNewAnonymousLeadByHTTPRequest(r *http.Request) (info crmdLead) {
 	info.FirstName = "Anonymous"
 	info.LastName = "User " + r.RemoteAddr
 	if ok {
 		log.Println("setlead cookie :" + leadID[0])
 		cookie := cookieFromLeadID(leadID[0])
+		log.Println(cookie)
 		http.SetCookie(w, &cookie)
 	} else {
 		cookie := crmpixelCookie(r)
 		if k == "lid" || k == "url" || k == "expire" || k == "nonce" || k == "signature" || k == "timestamp" { //skip lead id and URL and expire
 			continue
 		}
-		log.Printf("set cookie %s=%s", k, v)
-		cookie := cookieCreate(k, v[0], expire)
-		http.SetCookie(w, &cookie)
+
+		if v[0] != "" {
+			log.Printf("set cookie %s=%s", k, v)
+			cookie := cookieCreate(k, v[0], expire)
+			http.SetCookie(w, &cookie)
+		} else { //clear cook
+			log.Printf("clear cookie %s=%s", k, v)
+			cookie := cookieClear(k)
+			http.SetCookie(w, &cookie)
+		}
 	}
 
 	//perform redirect