finish upstream subcommand

.gitignore

@@ -0,0 +1 @@
+/test

cmd/upstream.go

@@ -1,13 +1,17 @@
 package cmd
 
 import (
+	"dtool/prober"
 	_ "dtool/prober"
 	"dtool/utils"
+	_ "dtool/utils"
+	"errors"
 
 	"github.com/spf13/cobra"
 )
 
 var filename string
+var output_file string
 var thread_num int
 var upstreamCmd = &cobra.Command{
 	Use: "upstream",
@@ -17,16 +21,30 @@ var upstreamCmd = &cobra.Command{
 input target can be added as an argument or as a file
 
 	-f	input file with limited ip addresses (limit=50)
+	-o  output file default json type
 	-t	number of goroutine`,
-	Args: cobra.ExactArgs(1),
+	//Args: cobra.ExactArgs(1),
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: upstream,
-		//prober.Get_upstream_ip(args[0])
+}
-		utils.SendTencentHttpdnsQuery()
+
-	},
+func upstream(cmd *cobra.Command, args []string) {
+	if len(args) > 1 {
+		panic(errors.New("too many arguments!"))
+	} else if len(args) == 1 {
+		if utils.IsValidIP(args[0]) {
+			prober.Get_upstream_ip(args[0])
+		} else {
+			panic(errors.New("invalid ip address"))
+		}
+	} else if len(args) == 0 {
+		prober.Get_upstream_file(filename, output_file, thread_num)
+	}
 }
 
 func init() {
-	upstreamCmd.Flags().StringVarP(&filename, "file", "f", "", "input filename")
+	upstreamCmd.Flags().StringVarP(&filename, "file", "f", "", "input file(optional)")
+	upstreamCmd.Flags().StringVarP(&output_file, "output", "o", "", "output file(optional)")
+	upstreamCmd.MarkFlagsRequiredTogether("file", "output")
 	upstreamCmd.Flags().IntVarP(&thread_num, "threads", "t", 10, "number of concurrent threads")
 	rootCmd.AddCommand(upstreamCmd)
 }

go.mod

@@ -2,11 +2,13 @@ module dtool
 
 go 1.20
 
-require github.com/spf13/cobra v1.7.0
+require (
+	github.com/miekg/dns v1.1.54
+	github.com/spf13/cobra v1.7.0
+)
 
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/miekg/dns v1.1.54 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	golang.org/x/mod v0.7.0 // indirect
 	golang.org/x/net v0.2.0 // indirect

go.sum

@@ -12,6 +12,7 @@ golang.org/x/mod v0.7.0 h1:LapD9S96VoQRhi/GrNTqeBJFrUjs5UHCAtTlgwA5oZA=
 golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.2.0 h1:sZfSu1wtKLGlWI4ZZayP0ck9Y73K1ynO6gqzTdBVdPU=
 golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
+golang.org/x/sync v0.1.0 h1:wsuoTGHzEhffawBOhz5CYhcrV4IdKZbEyZjBMuTp12o=
 golang.org/x/sys v0.2.0 h1:ljd4t30dBnAvMZaQCevtY0xLLD0A+bRZXbgLMLU1F/A=
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/tools v0.3.0 h1:SrNbZl6ECOS1qFzgTdQfWXZM9XBkiA6tkFrH9YSTPHM=

prober/rdns_prober.go

@@ -24,8 +24,7 @@ func retrieve_ip(pool chan string, filename string) {
 	cnt := 0
 	f, err := os.Open(filename)
 	if err != nil {
-		fmt.Printf("cannot open file %s\n", filename)
+		panic(err)
-		return
 	}
 	fmt.Println("sending msg ...")
 	reader := bufio.NewReader(f)
@@ -104,7 +103,7 @@ func store_data(pool chan Data, wg *sync.WaitGroup) {
 	wg.Done()
 }
 
-func Get_upstream_file(filename string, prober_num int) {
+func Get_upstream_file(filename string, output string, prober_num int) {
 	dataset = map[string][]string{}
 	ip_pool := make(chan string, 500)
 	data_pool := make(chan Data, 200)
@@ -117,7 +116,7 @@ func Get_upstream_file(filename string, prober_num int) {
 	probe_tasks.Wait()
 	close(data_pool)
 	store_task.Wait()
-	utils.OutputJSON(dataset)
+	utils.OutputJSON(dataset, output)
 }
 
 func Get_upstream_ip(ip string) {
@@ -129,5 +128,5 @@ func Get_upstream_ip(ip string) {
 		temp = append(temp, rdns)
 	}
 	dataset[data.target] = temp
-	utils.OutputJSON(dataset)
+	utils.OutputJSON(dataset, "-")
 }

utils/other_utils.go

@@ -0,0 +1,13 @@
+package utils
+
+import (
+	"net"
+)
+
+func IsValidIP(ip string) bool {
+	res := net.ParseIP(ip)
+	if res == nil {
+		return false
+	}
+	return true
+}

utils/output_utils.go

@@ -3,13 +3,22 @@ package utils
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 )
 
-func OutputJSON(data map[string][]string) {
+func OutputJSON(data interface{}, filename string) error {
 	jsonstr, err := json.MarshalIndent(data, "", "    ")
 	if err != nil {
 		fmt.Println("JSON encoding error:", err)
-		return
+		return err
 	}
-	fmt.Println(string(jsonstr))
+	if filename == "-" {
+		fmt.Println(string(jsonstr))
+	} else {
+		err := ioutil.WriteFile(filename, jsonstr, 0666)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
 }