Properly align displayed results using TabWriter

cmd/root.go

@@ -47,6 +47,7 @@ var (
 				queryTypes = core.FilterQueryTypes(queryTypes, flagStore.UserSpecifiedQueryType)
 			}
 
+			var results []model.QueryResult
 			// Send a DNS query for each query type in the queryTypes slice
 			for _, queryType := range queryTypes {
 				msg := core.PrepareDNSQuery(domainName, queryType.Type)
@@ -55,9 +56,11 @@ var (
 				if err != nil {
 					log.Fatal(err)
 				}
+				results = append(results, model.QueryResult{QueryType: queryType, Records: response.Answer})
 
-				core.DisplayRecords(domainName, queryType, response.Answer)
 			}
+			// Print the results
+			core.DisplayRecords(domainName, results)
 		},
 	}
 )

go.mod

@@ -8,10 +8,15 @@ require (
 	github.com/spf13/cobra v1.8.0
 )
 
-require golang.org/x/net v0.20.0 // indirect
+require (
+	github.com/lunixbochs/vtclean v1.0.0 // indirect
+	github.com/stretchr/testify v1.8.4 // indirect
+	golang.org/x/net v0.20.0 // indirect
+)
 
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/juju/ansiterm v1.0.0
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/sirupsen/logrus v1.9.3

go.sum

@@ -6,8 +6,20 @@ github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
 github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/juju/ansiterm v1.0.0 h1:gmMvnZRq7JZJx6jkfSq9/+2LMrVEwGwt7UR6G+lmDEg=
+github.com/juju/ansiterm v1.0.0/go.mod h1:PyXUpnI3olx3bsPcHt98FGPX/KCFZ1Fi+hw1XLI6384=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
+github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/lunixbochs/vtclean v1.0.0 h1:xu2sLAri4lGiovBDQKxl5mrXyESr3gUr5m5SM5+LVb8=
+github.com/lunixbochs/vtclean v1.0.0/go.mod h1:pHhQNgMf3btfWnGBVipUOjRYhoOsdGqdm/+2c2E2WMI=
+github.com/mattn/go-colorable v0.1.10/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
@@ -23,14 +35,18 @@ github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyh
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 golang.org/x/mod v0.14.0 h1:dGoOF9QVLYng8IHTm7BAyWqCqSheQ5pYWGhzW00YJr0=
 golang.org/x/mod v0.14.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
 golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
 golang.org/x/net v0.20.0/go.mod h1:z8BVo6PvndSri0LbOE3hAn0apkU+1YvI6E70E9jsnvY=
 golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -39,6 +55,8 @@ golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/tools v0.17.0 h1:FvmRgNOcs3kOa+T20R1uhfP9F6HgG2mfxDv1vrx1Htc=
 golang.org/x/tools v0.17.0/go.mod h1:xsh6VxdV005rRVaS6SSAf9oiAqljS7UZUacMZ8Bnsps=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

pkg/core/core.go

@@ -3,11 +3,15 @@ package core
 import (
 	"fmt"
 	"net"
+	"os"
 	"runtime"
+	"strconv"
+	"strings"
 	"time"
 
 	model "github.com/bschaatsbergen/dnsee/pkg/model"
 	"github.com/fatih/color"
+	"github.com/juju/ansiterm"
 	"github.com/miekg/dns"
 	"github.com/sirupsen/logrus"
 )
@@ -78,47 +82,50 @@ func SendDNSQuery(client *dns.Client, msg dns.Msg, dnsServerIP, dnsServerPort st
 	return response, timeDuration, nil
 }
 
-// DisplayRecords displays the DNS records returned by the DNS server.
-func DisplayRecords(domainName string, queryType struct {
-	Type uint16
-	Name string
-}, answers []dns.RR) {
-	for _, ans := range answers {
-		switch queryType.Type {
-		case dns.TypeA:
-			if aRecord, ok := ans.(*dns.A); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(aRecord.Hdr.Ttl), aRecord.A)
-			}
-		case dns.TypeAAAA:
-			if aaaaRecord, ok := ans.(*dns.AAAA); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(aaaaRecord.Hdr.Ttl), aaaaRecord.AAAA)
-			}
-		case dns.TypeCNAME:
-			if cnameRecord, ok := ans.(*dns.CNAME); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(cnameRecord.Hdr.Ttl), cnameRecord.Target)
-			}
-		case dns.TypeMX:
-			if mxRecord, ok := ans.(*dns.MX); ok {
-				fmt.Printf("%s\t%s.\t%s\t%d\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(mxRecord.Hdr.Ttl), mxRecord.Preference, mxRecord.Mx)
-			}
-		case dns.TypeTXT:
-			if txtRecord, ok := ans.(*dns.TXT); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(txtRecord.Hdr.Ttl), txtRecord.Txt[0])
-			}
-		case dns.TypeNS:
-			if nsRecord, ok := ans.(*dns.NS); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(nsRecord.Hdr.Ttl), nsRecord.Ns)
-			}
-		case dns.TypeSOA:
-			if soaRecord, ok := ans.(*dns.SOA); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(soaRecord.Hdr.Ttl), soaRecord.Ns, soaRecord.Mbox)
-			}
-		case dns.TypePTR:
-			if ptrRecord, ok := ans.(*dns.PTR); ok {
-				fmt.Printf("%s\t%s.\t%s\t%s\n", color.HiYellowString(queryType.Name), color.HiBlueString(domainName), FormatTTL(ptrRecord.Hdr.Ttl), ptrRecord.Ptr)
+func DisplayRecords(domainName string, results []model.QueryResult) {
+
+	w := ansiterm.NewTabWriter(os.Stdout, 8, 8, 4, ' ', 0)
+	w.SetColorCapable(true)
+
+	for _, result := range results {
+		for _, record := range result.Records {
+			switch result.QueryType.Type {
+			case dns.TypeA:
+				if aRecord, ok := record.(*dns.A); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(aRecord.Hdr.Ttl)), color.HiWhiteString(aRecord.A.String()))
+				}
+			case dns.TypeAAAA:
+				if aaaaRecord, ok := record.(*dns.AAAA); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(aaaaRecord.Hdr.Ttl)), color.HiWhiteString(aaaaRecord.AAAA.String()))
+				}
+			case dns.TypeCNAME:
+				if cnameRecord, ok := record.(*dns.CNAME); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(cnameRecord.Hdr.Ttl)), color.HiWhiteString(cnameRecord.Target))
+				}
+			case dns.TypeMX:
+				if mxRecord, ok := record.(*dns.MX); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(mxRecord.Hdr.Ttl)), strings.Join([]string{color.HiRedString(strconv.FormatUint(uint64(mxRecord.Preference), 10)), color.HiWhiteString(mxRecord.Mx)}, "  "))
+				}
+			case dns.TypeTXT:
+				if txtRecord, ok := record.(*dns.TXT); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(txtRecord.Hdr.Ttl)), color.HiWhiteString(txtRecord.Txt[0]))
+				}
+			case dns.TypeNS:
+				if nsRecord, ok := record.(*dns.NS); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(nsRecord.Hdr.Ttl)), color.HiWhiteString(nsRecord.Ns))
+				}
+			case dns.TypeSOA:
+				if soaRecord, ok := record.(*dns.SOA); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(soaRecord.Hdr.Ttl)), color.HiWhiteString(soaRecord.Ns), color.GreenString(soaRecord.Mbox))
+				}
+			case dns.TypePTR:
+				if ptrRecord, ok := record.(*dns.PTR); ok {
+					fmt.Fprintf(w, "%s\t%s.\t%s\t%s\t\n", color.HiYellowString(result.QueryType.Name), color.HiBlueString(domainName), color.HiMagentaString(FormatTTL(ptrRecord.Hdr.Ttl)), color.HiWhiteString(ptrRecord.Ptr))
+				}
 			}
 		}
 	}
+	w.Flush() // Write table to stdout
 }
 
 func FormatTTL(ttl uint32) string {
@@ -129,8 +136,8 @@ func FormatTTL(ttl uint32) string {
 	if hours > 0 {
 		return fmt.Sprintf("%02dh%02dm%02ds", hours, minutes, seconds)
 	} else if minutes > 0 {
-		return fmt.Sprintf("%02dm%02ds   ", minutes, seconds)
+		return fmt.Sprintf("%02dm%02ds", minutes, seconds)
 	} else {
-		return fmt.Sprintf("%02ds      ", seconds)
+		return fmt.Sprintf("%02ds", seconds)
 	}
 }

pkg/model/model.go

@@ -1,6 +1,13 @@
 package model
 
+import "github.com/miekg/dns"
+
 type QueryType struct {
 	Type uint16
 	Name string
 }
+
+type QueryResult struct {
+	QueryType QueryType
+	Records   []dns.RR
+}