diff --git a/src/components/SimpleUploader/globalUploader.vue b/src/components/SimpleUploader/globalUploader.vue
index 96d80d3..cdefb1c 100755
--- a/src/components/SimpleUploader/globalUploader.vue
+++ b/src/components/SimpleUploader/globalUploader.vue
@@ -132,7 +132,7 @@ export default {
         // speedSmoothingFactor: 0.1,
         // progressCallbacksInterval: 500,
         maxChunkRetries: 3, // 最大重试次数
-        simultaneousUploads: 5, // 并发上传数
+        simultaneousUploads: 2, // 并发上传数
         testChunks: true, // 是否开启服务器分片校验
         // 服务器分片校验函数，秒传及断点续传基础
         checkChunkUploadedByResponse: function (chunk, message) {
@@ -204,7 +204,7 @@ export default {
     message(msg) {
       switch (msg.event) {
         case 'uploaderChunkSize':
-          this.onStorageTypeChange(msg.data)
+          this.onStorageTypeChange(msg.data.body)
           break
         case 'fileListScrollTop':
           this.fileListScrollTop = msg.data
diff --git a/src/components/TaskProgress/index.vue b/src/components/TaskProgress/index.vue
index 3332202..e94bcde 100644
--- a/src/components/TaskProgress/index.vue
+++ b/src/components/TaskProgress/index.vue
@@ -43,7 +43,6 @@ export default {
   },
   watch: {
     data(val) {
-      console.log('data', val)
       this.dataList = val
     },
     message(msg) {
diff --git a/src/layout/index.vue b/src/layout/index.vue
index bda9cbf..8139763 100644
--- a/src/layout/index.vue
+++ b/src/layout/index.vue
@@ -21,7 +21,7 @@ import ResizeMixin from './mixin/ResizeHandler'
 import { getToken } from '@/utils/auth'
 import AudioPreview from "@/components/preview/AudioPreview";
 import globalUploader from '@/components/SimpleUploader/globalUploader.vue'
-import { connectToSSE } from '@/sse/SSEClient'
+import { initiateSSE } from '@/sse/SSEClient'
 
 export default {
   name: 'Layout',
@@ -62,7 +62,7 @@ export default {
     if(getToken()){
       this.isShow = window.pc;
       // 与服务器建立sse连接
-      connectToSSE(this.$store.state.user.name)
+      initiateSSE(this.$store.state.user.name)
       if(this.$route.path.startsWith('/setting')){
         this.isShow = true
       }
diff --git a/src/sse/SSEClient.js b/src/sse/SSEClient.js
index 9af1157..4e21cb1 100644
--- a/src/sse/SSEClient.js
+++ b/src/sse/SSEClient.js
@@ -1,92 +1,108 @@
 import Bus from "@/assets/js/bus";
 import _ from "lodash";
 import store from "@/store";
-import {generateUUID} from "ant-design-vue/lib/vc-select/util";
+import { generateUUID } from "ant-design-vue/lib/vc-select/util";
 
 let eventSource = null;
 let timer = null;
 let lastHeartbeat = new Date().getTime();
-
 const uuid = generateUUID();
 
-const throttledConnectSSE = _.throttle(username => {
-  if (typeof (EventSource) !== 'undefined') {
-    const url = `/api/events?username=${username}&uuid=${uuid}`;
-    eventSource = new EventSource(url);
-    eventSource.addEventListener('message', function (event) {
-      if (event.data === 'h') {
-        // 心跳包, 超过5s没有收到心跳包, 则关闭连接
-        lastHeartbeat = new Date().getTime()
-      } else {
-        const msg = JSON.parse( event.data);
-        onMessage(msg)
-      }
-    });
-    eventSource.addEventListener('error', function (event) {
-      eventSource.close()
-      connectToSSE(username);
-    });
-    // 清除定时器
-    if (timer) {
-      clearInterval(timer);
-    }
-    // 3s检测一次连接状态
-    timer = setInterval(() => {
-      if (eventSource.readyState === 1) {
-        // 心跳包, 超过5s没有收到心跳包, 则关闭连接
-        if (new Date().getTime() - lastHeartbeat > 5000) {
-          eventSource.close()
-        }
-      }
-      if (eventSource.readyState === 2) {
-        connectToSSE(username);
-      }
-    }, 3000);
+const throttledConnectSSE = _.throttle((username) => {
+  if (typeof EventSource !== 'undefined') {
+    connectToSSE(username);
   } else {
     console.error('EventSource is not supported by the browser');
   }
 }, 3000);
 
-export function connectToSSE(username) {
+function connectToSSE(username) {
+  const url = `/api/events?username=${username}&uuid=${uuid}`;
+  eventSource = new EventSource(url);
+
+  eventSource.addEventListener('message', handleMessage);
+  eventSource.addEventListener('error', handleError.bind(null, username));
+  startHeartbeatCheck(username);
+}
+
+function handleMessage(event) {
+  if (event.data === 'h') {
+    lastHeartbeat = new Date().getTime();
+  } else {
+    const msg = JSON.parse(event.data);
+    onMessage(msg);
+  }
+}
+
+function handleError(username) {
+  eventSource.close();
   throttledConnectSSE(username);
 }
 
+function clearExistingTimer() {
+  if (timer) {
+    clearInterval(timer);
+  }
+}
+
+function startHeartbeatCheck(username) {
+  clearExistingTimer();
+  timer = setInterval(() => {
+    if (eventSource.readyState === 1 && new Date().getTime() - lastHeartbeat > 5000) {
+      eventSource.close();
+    }
+    if (eventSource.readyState === 2) {
+      throttledConnectSSE(username);
+    }
+  }, 3000);
+}
+
 function onMessage(msg) {
-  const url = msg.url
-  if (url === 'synced') {
-    store.dispatch('updateMessage', {event: 'msg/synced', data: msg})
-  } else if (url === 'taskProgress') {
-    store.dispatch('updateMessage', {event: 'msg/taskProgress', data: msg})
-  } else if (url === 'uploaderChunkSize') {
-    store.dispatch('updateMessage', {event: 'uploaderChunkSize', data: msg.body})
+  const { url, body } = msg;
+  const eventMapping = {
+    synced: 'msg/synced',
+    taskProgress: 'msg/taskProgress',
+    uploaderChunkSize: 'uploaderChunkSize',
+  };
+
+  if (eventMapping[url]) {
+    store.dispatch('updateMessage', { event: eventMapping[url], data: msg });
   } else {
-    store.dispatch('updateMessage', {event: 'msg/file/change', data: msg})
-    if ('operationFile' === url) {
-      let doc = msg.body
-      if (doc.code === 0) {
-        Bus.notify({
-          title: `${doc.operation}成功`,
-          dangerouslyUseHTMLString: true,
-          message: `
-                <div>
-                  <p>form:</p>
-                  <pre style="word-break: break-all;white-space: pre-wrap;font-size: 12px;">${doc.from}</pre>
-                </div>
-                <div>
-                  <p>to:</p>
-                  <pre style="word-break: break-all;white-space: pre-wrap;font-size: 12px;">${doc.to}</pre>
-                </div>`,
-          type: 'success',
-        });
-      } else {
-        store.dispatch('updateMessage', {event: 'msg/file/operation/fault', data: msg});
-        Bus.notify({
-          title: `${doc.operation}失败`,
-          dangerouslyUseHTMLString: true,
-          message: `<span style="font-size: 12px;">${doc.msg}</span>`,
-          type: 'error'
-        });
-      }
+    handleFileChangeMessage(msg, url, body);
+  }
+}
+
+function handleFileChangeMessage(msg, url, body) {
+  store.dispatch('updateMessage', { event: 'msg/file/change', data: msg });
+
+  if (url === 'operationFile') {
+    const { operation, from, to, code, msg: message } = body;
+    const notificationOptions = {
+      title: `${operation} ${code === 0 ? '成功' : '失败'}`,
+      dangerouslyUseHTMLString: true,
+      message: code === 0
+        ? `
+            <div>
+              <p>from:</p>
+              <pre style="word-break: break-all;white-space: pre-wrap;font-size: 12px;">${from}</pre>
+            </div>
+            <div>
+              <p>to:</p>
+              <pre style="word-break: break-all;white-space: pre-wrap;font-size: 12px;">${to}</pre>
+            </div>`
+        : `<span style="font-size: 12px;">${message}</span>`,
+      type: code === 0 ? 'success' : 'error',
+    };
+
+    Bus.notify(notificationOptions);
+
+    if (code !== 0) {
+      store.dispatch('updateMessage', { event: 'msg/file/operation/fault', data: msg });
     }
   }
 }
+
+export function initiateSSE(username) {
+  throttledConnectSSE(username);
+}
+