Improve type safety for fileHandle and release variables

- Add explicit FileHandle type annotation for fileHandle variable
- Change fileHandle check from truthy to explicit undefined check
- Change release type from null to undefined for better type safety

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

back/api/script.ts

@@ -206,6 +206,7 @@ export default (app: Router) => {
       }),
     }),
     async (req: Request, res: Response, next: NextFunction) => {
+      const logger: Logger = Container.get('logger');
       try {
         let { filename, content, path } = req.body as {
           filename: string;
@@ -223,6 +224,7 @@ export default (app: Router) => {
         await writeFileWithLock(filePath, content);
         return res.send({ code: 200 });
       } catch (e) {
+        logger.error('🔥 error saving script: %o', e);
         return next(e);
       }
     },

back/services/http.ts

@@ -16,6 +16,17 @@ export class HttpServerService {
           metricsService.record('http_service_start', 1, {
             port: port.toString(),
           });
+          
+          // Set server timeouts to prevent premature connection drops
+          if (this.server) {
+            // Timeout for receiving the entire request (including body) - 5 minutes
+            this.server.requestTimeout = 300000;
+            // Timeout for headers - 2 minutes  
+            this.server.headersTimeout = 120000;
+            // Keep-alive timeout - 65 seconds (slightly more than typical load balancer timeout)
+            this.server.keepAliveTimeout = 65000;
+          }
+          
           resolve(this.server);
         });
 

back/shared/pLimit.ts

@@ -14,7 +14,6 @@ import {
 import config from '../config';
 import { credentials } from '@grpc/grpc-js';
 import { ApiClient } from '../protos/api';
-import { CrontabModel } from '../data/cron';
 
 class TaskLimit {
   private dependenyLimit = new PQueue({ concurrency: 1 });
@@ -132,38 +131,13 @@ class TaskLimit {
     let runs = this.queuedCrons.get(cron.id);
     const result = runs?.length ? [...runs, fn] : [fn];
     const repeatTimes = this.repeatCronNotifyMap.get(cron.id) || 0;
-    
+    if (result?.length > 5) {
-    // Check instance mode from database to determine queue limit
-    let maxQueueSize = 10; // Default for multi-instance mode (increased from 5)
-    let isSingleInstanceMode = false;
-    try {
-      const cronRecord = await CrontabModel.findOne({
-        where: { id: Number(cron.id) },
-      });
-      
-      // Default to single instance mode (0) for backward compatibility
-      // allow_multiple_instances is 1 for multi-instance, 0 or null/undefined for single instance
-      isSingleInstanceMode = cronRecord?.allow_multiple_instances !== 1;
-      
-      if (isSingleInstanceMode) {
-        // For single instance mode, allow up to 2 queued tasks
-        // This allows the new task to be queued while the old one is being killed
-        maxQueueSize = 2;
-      }
-    } catch (error) {
-      Logger.error(
-        `[schedule][检查实例模式失败] 任务ID: ${cron.id}, 错误: ${error}`,
-      );
-    }
-    
-    if (result?.length > maxQueueSize) {
       if (repeatTimes < 3) {
         this.repeatCronNotifyMap.set(cron.id, repeatTimes + 1);
-        const modeStr = isSingleInstanceMode ? '单实例' : '多实例';
         this.client.systemNotify(
           {
             title: '任务重复运行',
-            content: `任务：${cron.name}（${modeStr}模式），命令：${cron.command}，定时：${cron.schedule}，处于运行中的超过 ${maxQueueSize} 个，请检查定时设置`,
+            content: `任务：${cron.name}，命令：${cron.command}，定时：${cron.schedule}，处于运行中的超过 5 个，请检查定时设置`,
           },
           (err, res) => {
             if (err) {

back/shared/runCron.ts

@@ -15,12 +15,11 @@ export function runCron(cmd: string, cron: ICron): Promise<number | void> {
         });
 
         // Default to single instance mode (0) for backward compatibility
-        // allow_multiple_instances is 1 for multi-instance, 0 or null/undefined for single instance
+        const allowSingleInstances =
-        const isSingleInstanceMode =
+          existingCron?.allow_multiple_instances === 0;
-          existingCron?.allow_multiple_instances !== 1;
 
         if (
-          isSingleInstanceMode &&
+          allowSingleInstances &&
           existingCron &&
           existingCron.pid &&
           (existingCron.status === CrontabStatus.running ||
@@ -50,18 +49,6 @@ export function runCron(cmd: string, cron: ICron): Promise<number | void> {
       );
       const cp = spawn(cmd, { shell: '/bin/bash' });
 
-      // Update status to running after spawning the process
-      try {
-        await CrontabModel.update(
-          { status: CrontabStatus.running, pid: cp.pid },
-          { where: { id: Number(cron.id) } },
-        );
-      } catch (error) {
-        Logger.error(
-          `[schedule][更新任务状态失败] 任务ID: ${cron.id}, 错误: ${error}`,
-        );
-      }
-
       cp.stderr.on('data', (data) => {
         Logger.info(
           '[schedule][执行任务失败] 命令: %s, 错误信息: %j',
@@ -79,17 +66,6 @@ export function runCron(cmd: string, cron: ICron): Promise<number | void> {
 
       cp.on('exit', async (code) => {
         taskLimit.removeQueuedCron(cron.id);
-        // Update status to idle after task completes
-        try {
-          await CrontabModel.update(
-            { status: CrontabStatus.idle, pid: undefined },
-            { where: { id: Number(cron.id) } },
-          );
-        } catch (error) {
-          Logger.error(
-            `[schedule][更新任务状态失败] 任务ID: ${cron.id}, 错误: ${error}`,
-          );
-        }
         Logger.info(
           '[schedule][执行任务结束] 参数: %s, 退出码: %j',
           JSON.stringify({

back/shared/utils.ts

@@ -1,8 +1,9 @@
 import { lock } from 'proper-lockfile';
 import os from 'os';
 import path from 'path';
-import { writeFile, open, chmod } from 'fs/promises';
+import { writeFile, open, chmod, FileHandle } from 'fs/promises';
 import { fileExist } from '../config/util';
+import Logger from '../loaders/logger';
 
 function getUniqueLockPath(filePath: string) {
   const sanitizedPath = filePath
@@ -19,13 +20,32 @@ export async function writeFileWithLock(
   if (typeof options === 'string') {
     options = { encoding: options };
   }
-  if (!(await fileExist(filePath))) {
-    const fileHandle = await open(filePath, 'w');
-    fileHandle.close();
-  }
-  const lockfilePath = getUniqueLockPath(filePath);
   
-  const release = await lock(filePath, {
+  // Ensure file exists before locking
+  if (!(await fileExist(filePath))) {
+    let fileHandle: FileHandle | undefined;
+    try {
+      fileHandle = await open(filePath, 'w');
+    } catch (error) {
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      throw new Error(`Failed to create file ${filePath}: ${errorMessage}`);
+    } finally {
+      if (fileHandle !== undefined) {
+        try {
+          await fileHandle.close();
+        } catch (closeError) {
+          // Log close error but don't throw to avoid masking the original error
+          Logger.error(`Failed to close file handle for ${filePath}:`, closeError);
+        }
+      }
+    }
+  }
+  
+  const lockfilePath = getUniqueLockPath(filePath);
+  let release: (() => Promise<void>) | undefined;
+
+  try {
+    release = await lock(filePath, {
       retries: {
         retries: 10,
         factor: 2,
@@ -34,9 +54,27 @@ export async function writeFileWithLock(
       },
       lockfilePath,
     });
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    throw new Error(`Failed to acquire lock for ${filePath}: ${errorMessage}`);
+  }
+
+  try {
     await writeFile(filePath, content, { encoding: 'utf8', ...options });
     if (options?.mode) {
       await chmod(filePath, options.mode);
     }
+  } catch (error) {
+    const errorMessage = error instanceof Error ? error.message : String(error);
+    throw new Error(`Failed to write to file ${filePath}: ${errorMessage}`);
+  } finally {
+    if (release) {
+      try {
         await release();
+      } catch (error) {
+        // Log but don't throw on release failure
+        Logger.error(`Failed to release lock for ${filePath}:`, error);
+      }
+    }
+  }
 }