diff --git a/src/client/web/src/client/index.ts b/src/client/web/src/client/index.ts
index a918e6b..6f81a42 100644
--- a/src/client/web/src/client/index.ts
+++ b/src/client/web/src/client/index.ts
@@ -142,6 +142,7 @@ export class BaseClient {
     return new Promise((resolve: (ret: Response) => void) => {
       setTimeout(() => {
         if (!returned) {
+          returned = true;
           src.cancel("request timeout");
           resolve(TimeoutResp);
         }
@@ -149,13 +150,17 @@ export class BaseClient {
 
       axios({ ...config, cancelToken: src.token })
         .then((resp) => {
-          returned = true;
-          resolve(resp);
+          if (!returned) {
+            returned = true;
+            resolve(resp);
+          }
         })
         .catch((e) => {
+          returned = true;
           const errMsg = e.toString();
 
           if (errMsg.includes("ERR_EMPTY")) {
+            // TODO: check if this is compatible with all browsers
             // this means connection is eliminated by server, it may be caused by timeout.
             resolve(EmptyBodyResp);
           } else if (e.response != null) {
diff --git a/src/client/web/src/client/users_mock.ts b/src/client/web/src/client/users_mock.ts
index 13d920a..e7071c6 100644
--- a/src/client/web/src/client/users_mock.ts
+++ b/src/client/web/src/client/users_mock.ts
@@ -40,7 +40,7 @@ export const resps = {
           role: "mock_role0",
           usedSpace: "128",
           quota: {
-            spaceLimit: 1024,
+            spaceLimit: "1024",
             uploadSpeedLimit: 1024,
             downloadSpeedLimit: 1024,
           },
@@ -52,7 +52,7 @@ export const resps = {
           role: "mock_role1",
           usedSpace: "256",
           quota: {
-            spaceLimit: 1024,
+            spaceLimit: "1024",
             uploadSpeedLimit: 1024,
             downloadSpeedLimit: 1024,
           },