rgw: remove refs to deprecated io/ioutil

Signed-off-by: guoguangwu <[email protected]>

rgw/admin/radosgw.go

@@ -3,7 +3,7 @@ package admin
 import (
 	"bytes"
 	"context"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"time"
@@ -98,12 +98,12 @@ func (api *API) call(ctx context.Context, httpMethod, path string, args url.Valu
 	defer resp.Body.Close()
 
 	// Decode HTTP response
-	decodedResponse, err := ioutil.ReadAll(resp.Body)
+	decodedResponse, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
 
-	resp.Body = ioutil.NopCloser(bytes.NewBuffer(decodedResponse))
+	resp.Body = io.NopCloser(bytes.NewBuffer(decodedResponse))
 
 	// Handle error in response
 	if resp.StatusCode >= 300 {

rgw/admin/subuser_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"testing"
 
@@ -57,7 +57,7 @@ func TestCreateSubuserMockAPI(t *testing.T) {
 
 // mockClient is defined in user_test.go
 func returnMockClientCreateSubuser() *mockClient {
-	r := ioutil.NopCloser(bytes.NewReader([]byte("")))
+	r := io.NopCloser(bytes.NewReader([]byte("")))
 	return &mockClient{
 		mockDo: func(req *http.Request) (*http.Response, error) {
 			if req.Method == http.MethodPut && req.URL.Path == "127.0.0.1/admin/user" {

rgw/admin/user_test.go

@@ -6,7 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"testing"
@@ -248,7 +248,7 @@ func TestGetUserMockAPI(t *testing.T) {
 }
 
 func returnMockClient() *mockClient {
-	r := ioutil.NopCloser(bytes.NewReader(fakeUserResponse))
+	r := io.NopCloser(bytes.NewReader(fakeUserResponse))
 	return &mockClient{
 		mockDo: func(req *http.Request) (*http.Response, error) {
 			if req.Method == http.MethodGet && req.URL.Path == "127.0.0.1/admin/user" {