feat:重连机制

src/views/components/utils/sseService.ts

@@ -118,10 +118,7 @@ export class SSEService {
         this.closeSSE();
 
         // 检测服务器不可用情况
-        const isServerUnavailable = error && 
-          (error.type === 'error' || 
-           (error.target && error.target.readyState === 0) ||
-           (error.message && error.message.includes('CONNECTION_REFUSED')));
+        const isServerUnavailable = this.isServerUnavailableError(error);
         
         if (isServerUnavailable) {
           console.error('⛔ 服务器不可用，停止重连');
@@ -231,26 +228,50 @@ export class SSEService {
 
   // 判断是否为服务器不可用错误
   private isServerUnavailableError(error: any): boolean {
-    // 检查错误类型和消息，判断是否为真正的服务器不可用
-    const errorMessage = error?.message || '';
-    const errorType = error?.type || '';
+    if (!error) return false;
     
-    // 服务器不可用的典型特征：
+    // 检查错误消息
+    const errorMessage = String(error.message || '').toLowerCase();
+    const errorString = String(error).toLowerCase();
+    
+    // 检查错误目标的状态
+    const errorTarget = error.target || error;
+    const readyState = errorTarget.readyState;
+    
+    // 服务器不可用的明确特征：
     // 1. 连接被拒绝 (net::ERR_CONNECTION_REFUSED)
     // 2. 服务器返回5xx错误
-    // 3. 连接超时但网络正常
-    const isConnectionRefused = errorMessage.includes('CONNECTION_REFUSED') || 
+    // 3. 明确的连接失败消息
+    const isConnectionRefused = errorMessage.includes('connection_refused') || 
                                errorMessage.includes('connection refused') ||
-                               errorMessage.includes('Failed to fetch');
+                               errorMessage.includes('failed to fetch') ||
+                               errorString.includes('connection_refused') ||
+                               errorString.includes('connection refused');
     
     const isServerError = errorMessage.includes('500') || 
                          errorMessage.includes('502') || 
                          errorMessage.includes('503') ||
-                         errorMessage.includes('504');
+                         errorMessage.includes('504') ||
+                         errorString.includes('500') ||
+                         errorString.includes('502') ||
+                         errorString.includes('503') ||
+                         errorString.includes('504');
     
     // 只有当明确是服务器不可用时才停止重连
     // 避免将正常的网络波动误判为服务器不可用
-    return isConnectionRefused || isServerError;
+    const isUnavailable = isConnectionRefused || isServerError;
+    
+    if (isUnavailable) {
+      console.log('🔍 检测到服务器不可用错误:', {
+        message: errorMessage,
+        string: errorString,
+        readyState: readyState,
+        isConnectionRefused,
+        isServerError
+      });
+    }
+    
+    return isUnavailable;
   }