fix: fix golangci-lint errors

Author: hsluoyz

casdoorsdk/policy.go

@@ -28,30 +28,25 @@ type CasbinRule struct {
 	V3    string `xorm:"varchar(100) index not null default ''"`
 	V4    string `xorm:"varchar(100) index not null default ''"`
 	V5    string `xorm:"varchar(100) index not null default ''"`
-
-	tableName string `xorm:"-"`
 }
 
 func (c *Client) AddPolicy(enforcer *Enforcer, policy *CasbinRule) (bool, error) {
-	var policies []*CasbinRule
-	policies = make([]*CasbinRule, 1)
+	policies := make([]*CasbinRule, 1)
 	policies[0] = policy
 	_, affected, err := c.modifyPolicy("add-policy", enforcer, policies, nil)
 	return affected, err
 }
 
 func (c *Client) UpdatePolicy(enforcer *Enforcer, oldpolicy *CasbinRule, newpolicy *CasbinRule) (bool, error) {
-	var policies []*CasbinRule
-	policies = make([]*CasbinRule, 2)
+	policies := make([]*CasbinRule, 2)
 	policies[0] = oldpolicy
 	policies[1] = newpolicy
 	_, affected, err := c.modifyPolicy("update-policy", enforcer, policies, nil)
 	return affected, err
 }
 
 func (c *Client) RemovePolicy(enforcer *Enforcer, policy *CasbinRule) (bool, error) {
-	var policies []*CasbinRule
-	policies = make([]*CasbinRule, 1)
+	policies := make([]*CasbinRule, 1)
 	policies[0] = policy
 	_, affected, err := c.modifyPolicy("remove-policy", enforcer, policies, nil)
 	return affected, err

casdoorsdk/resource_test.go

@@ -34,7 +34,11 @@ func TestResource(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Failed to open the file: %v\n", err)
 	}
-	defer file.Close()
+	defer func() {
+		if err := file.Close(); err != nil {
+			t.Errorf("Failed to close the file: %v\n", err)
+		}
+	}()
 	data, err := io.ReadAll(file)
 	if err != nil {
 		t.Fatalf("Failed to read data from the file: %v\n", err)

casdoorsdk/util.go

@@ -46,7 +46,6 @@ func createFormFile(formData map[string][]byte) (string, io.Reader, error) {
 
 	body := new(bytes.Buffer)
 	w := multipart.NewWriter(body)
-	defer w.Close()
 
 	for k, v := range formData {
 		pw, err := w.CreateFormFile(k, "file")
@@ -60,6 +59,10 @@ func createFormFile(formData map[string][]byte) (string, io.Reader, error) {
 		}
 	}
 
+	if err := w.Close(); err != nil {
+		return "", nil, err
+	}
+
 	return w.FormDataContentType(), body, nil
 }