Add debug statements

main.go

@@ -23,12 +23,17 @@ func (h *dnsHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
 
 		if question.Qtype == dns.TypeCNAME || question.Qtype == dns.TypeA || question.Qtype == dns.TypeAAAA {
 			if strings.HasSuffix(question.Name, "prime.cringe-studios.com") || strings.HasSuffix(question.Name, "prime.cringe-studios.com.") {
+				log.Println("Prime request")
 				primeAnswer := HandlePrimeNumberChecker(question)
+				log.Println("about to append request: %i", primeAnswer)
 
 				if primeAnswer != nil {
+					log.Println("appending")
 					msg.Answer = append(msg.Answer, primeAnswer)
 				}
 
+				log.Println("finished")
+
 				continue
 			}
 

prime.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"log"
 	"math/big"
 	"regexp"
 	"strings"
@@ -18,74 +19,102 @@ func IsNumber(stringToCheck string) bool {
 }
 
 func HandlePrimeNumberChecker(question dns.Question) dns.RR {
+	log.Println("1")
 	mainDomainPartindex := strings.LastIndex(question.Name, "prime.cringe-studios.com")
+	log.Println("2")
 	if mainDomainPartindex == 0 || mainDomainPartindex == 1 {
 		// TODO handle ns page part.. maybe send back a CNAME for a page to enter the number
+		log.Println("3")
 
 		return nil
 	}
 
 	isQuestionPartIndex := strings.LastIndex(question.Name, "is.prime.cringe-studios.com")
+	log.Println("4")
 	if isQuestionPartIndex == 0 || isQuestionPartIndex == 1 {
+		log.Println("5")
 		// TODO handle resource found
 		return nil
 	}
 
 	isnotQuestionPartIndex := strings.LastIndex(question.Name, "isnot.prime.cringe-studios.com")
+	log.Println("6")
 	if isnotQuestionPartIndex == 0 || isnotQuestionPartIndex == 1 {
 		// TODO handle resource found
+		log.Println("7")
 		return nil
 	}
 
 	maybeQuestionPartIndex := strings.LastIndex(question.Name, "maybe.prime.cringe-studios.com")
+	log.Println("8")
 	if maybeQuestionPartIndex == 0 || maybeQuestionPartIndex == 1 {
 		// TODO handle resource found
+		log.Println("9")
 		return nil
 	}
 
 	mainDomainPart := question.Name[0 : mainDomainPartindex-1] // subtract 1 for the p in prime
+	log.Println("10:" + mainDomainPart)
 
 	if !strings.HasSuffix(mainDomainPart, ".") {
 		// unknown subdomain like 123prime.cringe-studios.com
+		log.Println("11")
 		return nil
 	}
 
 	mainDomainPart = mainDomainPart[0 : len(mainDomainPart)-2] // subtract 1 to accomodate for the length being one bigger then the last index, and subtract another one for the dot at the end
+	log.Println("12:" + mainDomainPart)
 
 	if len(mainDomainPart) == 0 {
 		// .prime.cringe-studios.com
+		log.Println("13")
 		return nil
 	}
 
 	firstIsIndex := strings.Index(mainDomainPart, "is.")
 
+	log.Println("14")
+
 	if firstIsIndex == 0 || firstIsIndex == 1 {
 		// word "is." found at the beginning of the question.. trim
 		mainDomainPart = mainDomainPart[len("is.") : len(mainDomainPart)-1]
 	}
 
+	log.Println("15: " + mainDomainPart)
+
 	if len(mainDomainPart) == 0 {
 		// requested domain was is.prime.cringe-studios.com or something like that...
 		// TODO
+		log.Println("16")
 		return nil
 	}
 
+	log.Println("16.5")
+
 	if !IsNumber(mainDomainPart) {
 		// TODO return cname to isnot.prime.cringe-studios.com
+		log.Println("17")
 		return nil
 	}
 
+	log.Println("18")
+
 	bigNumber := new(big.Int)
 	fmt.Sscan(mainDomainPart, bigNumber)
 
+	log.Println("19")
+
 	if bigNumber.Cmp(maximumPrimeNumber) == 1 {
 		// number is bigger than the maximum limit for the propablyprime function
 		// TODO return CNAME for maybe.prime.cringe-studios.com
 
+		log.Println("20")
+
 		return nil
 	}
 
 	if bigNumber.ProbablyPrime(20) {
+		log.Println("21")
 		// is prime, because the cases bigger than 2^64-1 have been catched above
 		return &dns.CNAME{
 			Hdr: dns.RR_Header{
@@ -97,6 +126,7 @@ func HandlePrimeNumberChecker(question dns.Question) dns.RR {
 			Target: "is.prime.cringe-studios.com.",
 		}
 	} else {
+		log.Println("22")
 		// is not prime
 		return &dns.CNAME{
 			Hdr: dns.RR_Header{