*: enable golangci-lint asciicheck and bodyclose

.golangci.yml

@@ -16,6 +16,8 @@ linters:
     - staticcheck
     - stylecheck
     - gosec
+    - asciicheck
+    - bodyclose
 linters-settings:
   staticcheck:
     checks: ["S1002","S1004","S1007","S1009","S1010","S1012","S1019","S1020","S1021","S1024","S1030","SA2*","SA3*","SA4009","SA5*","SA6000","SA6001","SA6005", "-SA2002"]

domain/infosync/info.go

@@ -333,13 +333,7 @@ func doRequest(ctx context.Context, addrs []string, route, method string, body i
 			req.Header.Set("Content-Type", "application/json")
 		}
 
-		res, err = util2.InternalHTTPClient().Do(req)
-		failpoint.Inject("FailPlacement", func(val failpoint.Value) {
-			if val.(bool) {
-				res = &http.Response{StatusCode: http.StatusNotFound, Body: http.NoBody}
-				err = nil
-			}
-		})
+		res, err = doRequestWithFailpoint(req)
 		if err == nil {
 			bodyBytes, err := io.ReadAll(res.Body)
 			if err != nil {
@@ -359,6 +353,21 @@ func doRequest(ctx context.Context, addrs []string, route, method string, body i
 	return nil, err
 }
 
+func doRequestWithFailpoint(req *http.Request) (resp *http.Response, err error) {
+	fpEnabled := false
+	failpoint.Inject("FailPlacement", func(val failpoint.Value) {
+		if val.(bool) {
+			fpEnabled = true
+			resp = &http.Response{StatusCode: http.StatusNotFound, Body: http.NoBody}
+			err = nil
+		}
+	})
+	if fpEnabled {
+		return
+	}
+	return util2.InternalHTTPClient().Do(req)
+}
+
 // GetAllRuleBundles is used to get all rule bundles from PD. It is used to load full rules from PD while fullload infoschema.
 func GetAllRuleBundles(ctx context.Context) ([]*placement.Bundle, error) {
 	is, err := getGlobalInfoSyncer()
@@ -696,6 +705,7 @@ func (is *InfoSyncer) getPrometheusAddr() (string, error) {
 	if err != nil {
 		return "", err
 	}
+	defer resp.Body.Close()
 	var metricStorage metricStorage
 	dec := json.NewDecoder(resp.Body)
 	err = dec.Decode(&metricStorage)

executor/infoschema_reader.go

@@ -2659,11 +2659,12 @@ func (e *TiFlashSystemTableRetriever) initialize(sctx sessionctx.Context, tiflas
 					if err != nil {
 						return errors.Trace(err)
 					}
-					_, err = util.InternalHTTPClient().Do(req)
+					resp, err := util.InternalHTTPClient().Do(req)
 					if err != nil {
 						sctx.GetSessionVars().StmtCtx.AppendWarning(err)
 						continue
 					}
+					resp.Body.Close()
 					e.instanceInfos = append(e.instanceInfos, tiflashInstanceInfo{
 						id:  id,
 						url: url,