fix: update ioutil func&pruning case (#39798)

util/printer.go

@@ -31,6 +31,7 @@ var (
 )
 
 // GetRawInfo do what its name tells
+// nolint:unused
 func GetRawInfo(app string) string {
 	info := ""
 	info += fmt.Sprintf("App Name: %s\n", app)
@@ -43,6 +44,7 @@ func GetRawInfo(app string) string {
 }
 
 // PrintInfo prints the app's basic information in log
+// nolint:unused
 func PrintInfo(app string) {
 	log.Info("Welcome to "+app,
 		zap.String("Release Version", Version),

util/util.go

@@ -18,7 +18,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"strconv"
@@ -63,6 +63,8 @@ func StringsToInterfaces(strs []string) []interface{} {
 //		return errors.Trace(err)
 //	}
 //	fmt.Println(resp.IP)
+//
+// nolint:unused
 func GetJSON(client *http.Client, url string, v interface{}) error {
 	resp, err := client.Get(url)
 	if err != nil {
@@ -71,7 +73,7 @@ func GetJSON(client *http.Client, url string, v interface{}) error {
 	defer resp.Body.Close()
 
 	if resp.StatusCode != http.StatusOK {
-		body, err := ioutil.ReadAll(resp.Body)
+		body, err := io.ReadAll(resp.Body)
 		if err != nil {
 			return errors.Trace(err)
 		}
@@ -181,7 +183,7 @@ func GenLogFields(costTime time.Duration, info *ProcessInfo, needTruncateSQL boo
 // PrintableASCII detects if b is a printable ASCII character.
 // Ref to:http://facweb.cs.depaul.edu/sjost/it212/documents/ascii-pr.htm
 func PrintableASCII(b byte) bool {
-	if b >= 0 && b < 32 || b > 127 {
+	if b < 32 || b > 127 {
 		return false
 	}