diff --git a/backend/app/rest/api/migrator.go b/backend/app/rest/api/migrator.go
index 731a4ed56b..4a38c2a9aa 100644
--- a/backend/app/rest/api/migrator.go
+++ b/backend/app/rest/api/migrator.go
@@ -136,7 +136,6 @@ func (m *Migrator) exportCtrl(w http.ResponseWriter, r *http.Request) {
 		exportFile := fmt.Sprintf("%s-%s.json.gz", siteID, time.Now().Format("20060102"))
 		w.Header().Set("Content-Type", "application/gzip")
 		w.Header().Set("Content-Disposition", "attachment;filename="+exportFile)
-		w.WriteHeader(http.StatusOK)
 		gzWriter := gzip.NewWriter(w)
 		defer func() {
 			if e := gzWriter.Close(); e != nil {
diff --git a/backend/app/rest/api/migrator_test.go b/backend/app/rest/api/migrator_test.go
index e1f5ff608d..4625087841 100644
--- a/backend/app/rest/api/migrator_test.go
+++ b/backend/app/rest/api/migrator_test.go
@@ -391,6 +391,15 @@ func TestMigrator_Export(t *testing.T) {
 	require.Equal(t, http.StatusAccepted, resp.StatusCode)
 	waitForMigrationCompletion(t, ts)
 
+	// export wrong site, should result in error
+	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=file&site=test", http.NoBody)
+	require.NoError(t, err)
+	req.SetBasicAuth("admin", "password")
+	resp, err = client.Do(req)
+	require.NoError(t, err)
+	require.Equal(t, http.StatusInternalServerError, resp.StatusCode)
+	require.Equal(t, "application/json", resp.Header.Get("Content-Type"))
+
 	// check file mode
 	req, err = http.NewRequest("GET", ts.URL+"/api/v1/admin/export?mode=file&site=remark42", http.NoBody)
 	require.NoError(t, err)
diff --git a/backend/app/rest/api/rss.go b/backend/app/rest/api/rss.go
index 4be92da079..da6617d6c2 100644
--- a/backend/app/rest/api/rss.go
+++ b/backend/app/rest/api/rss.go
@@ -56,7 +56,6 @@ func (s *rss) postCommentsCtrl(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Content-Type", "application/xml; charset=utf-8")
 	w.WriteHeader(http.StatusOK)
-
 	if _, err = w.Write(data); err != nil {
 		log.Printf("[WARN] failed to send response to %s, %s", r.RemoteAddr, err)
 	}
diff --git a/backend/remark.rest b/backend/remark.rest
index 7febc2180e..da088aedc8 100644
--- a/backend/remark.rest
+++ b/backend/remark.rest
@@ -103,6 +103,14 @@ GET {{host}}/api/v1/admin/blocked?site={{site}}
 ### delete comment by id
 DELETE {{host}}/api/v1/admin/comment/3665976683?site={{site}}&url={{url}}
 
+### export site (for backup)
+GET {{host}}/api/v1/admin/export?site={{site}}&mode=stream
+X-JWT: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcmsiLCJleHAiOjE5NzYwNTY3NTYsImp0aSI6IjJlOGJmMTE5OTI0MjQxMDRjYjFhZGRlODllMWYwNGFiMTg4YWZjMzQiLCJpYXQiOjE1NzYwNTY0NTYsImlzcyI6InJlbWFyazQyIiwidXNlciI6eyJuYW1lIjoiZGV2X3VzZXIiLCJpZCI6ImRldl91c2VyIiwicGljdHVyZSI6Imh0dHA6Ly8xMjcuMC4wLjE6ODA4MC9hcGkvdjEvYXZhdGFyL2NjZmEyYWJkMDE2Njc2MDViNGUxZmM0ZmNiOTFiMWUxYWYzMjMyNDAuaW1hZ2UiLCJhdHRycyI6eyJhZG1pbiI6dHJ1ZSwiYmxvY2tlZCI6ZmFsc2V9fX0.6Qt5s2enBMRC-Jmsua01yViVYI95Dx6BPBMaNjj36d4
+
+### export site (for backup) to .gz file
+GET {{host}}/api/v1/admin/export?site={{site}}&mode=file
+X-JWT: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJhdWQiOiJyZW1hcmsiLCJleHAiOjE5NzYwNTY3NTYsImp0aSI6IjJlOGJmMTE5OTI0MjQxMDRjYjFhZGRlODllMWYwNGFiMTg4YWZjMzQiLCJpYXQiOjE1NzYwNTY0NTYsImlzcyI6InJlbWFyazQyIiwidXNlciI6eyJuYW1lIjoiZGV2X3VzZXIiLCJpZCI6ImRldl91c2VyIiwicGljdHVyZSI6Imh0dHA6Ly8xMjcuMC4wLjE6ODA4MC9hcGkvdjEvYXZhdGFyL2NjZmEyYWJkMDE2Njc2MDViNGUxZmM0ZmNiOTFiMWUxYWYzMjMyNDAuaW1hZ2UiLCJhdHRycyI6eyJhZG1pbiI6dHJ1ZSwiYmxvY2tlZCI6ZmFsc2V9fX0.6Qt5s2enBMRC-Jmsua01yViVYI95Dx6BPBMaNjj36d4
+
 ### get post info
 GET {{host}}/api/v1/info?site={{site}}&url={{url}}