fix: enhance network error retry mechanism for polling

Expand retryable error codes in request and polling logic to improve
resilience in unstable network environments.

- Add support for ECONNRESET, ENOTFOUND, ECONNREFUSED, EAI_AGAIN,
  EPIPE, ENETUNREACH, EHOSTUNREACH error codes
- Add 'socket hang up' error message detection
- Implement retry logic in SmartPoller to continue polling on
  transient network errors instead of aborting immediately

Closes #118

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: 2 people

src/api/controllers/core.ts

@@ -386,9 +386,19 @@ export async function request(
       logger.error(`请求失败 (尝试 ${retries + 1}/${maxRetries + 1}): ${error.message}`);
 
       // 如果是网络错误或超时，尝试重试
-      if ((error.code === 'ECONNABORTED' || error.code === 'ETIMEDOUT' ||
-           error.message.includes('timeout') || error.message.includes('network')) &&
-          retries < maxRetries) {
+      // 包含常见的网络错误：ECONNRESET（连接重置）、ENOTFOUND（DNS解析失败）、
+      // ECONNREFUSED（连接被拒绝）、EAI_AGAIN（DNS临时失败）、EPIPE（管道破裂）
+      const retryableErrorCodes = [
+        'ECONNABORTED', 'ETIMEDOUT', 'ECONNRESET', 'ENOTFOUND',
+        'ECONNREFUSED', 'EAI_AGAIN', 'EPIPE', 'ENETUNREACH', 'EHOSTUNREACH'
+      ];
+      const isRetryableError = retryableErrorCodes.includes(error.code) ||
+        error.message.includes('timeout') ||
+        error.message.includes('network') ||
+        error.message.includes('ECONNRESET') ||
+        error.message.includes('socket hang up');
+
+      if (isRetryableError && retries < maxRetries) {
         retries++;
         continue;
       }

src/lib/smart-poller.ts

@@ -218,7 +218,26 @@ export class SmartPoller {
         }
 
       } catch (error) {
-        logger.error(`轮询过程中发生错误: ${error.message}`);
+        // 判断是否为可重试的网络错误
+        const retryableErrorCodes = [
+          'ECONNABORTED', 'ETIMEDOUT', 'ECONNRESET', 'ENOTFOUND',
+          'ECONNREFUSED', 'EAI_AGAIN', 'EPIPE', 'ENETUNREACH', 'EHOSTUNREACH'
+        ];
+        const isRetryableError = retryableErrorCodes.includes(error.code) ||
+          error.message?.includes('timeout') ||
+          error.message?.includes('network') ||
+          error.message?.includes('ECONNRESET') ||
+          error.message?.includes('socket hang up');
+
+        // 网络错误时进行轮询级别的重试，而不是直接中断整个流程
+        if (isRetryableError && this.pollCount < this.options.maxPollCount) {
+          logger.warn(`轮询过程中发生网络错误 (${error.code || error.message})，等待后继续轮询...`);
+          await new Promise(resolve => setTimeout(resolve, this.options.pollInterval));
+          continue;
+        }
+
+        // 不可重试的错误或已达到最大轮询次数，抛出异常
+        logger.error(`轮询过程中发生不可恢复的错误: ${error.message}`);
         throw error;
       }
     }