Fix ERR_EMPTY_RESPONSE on script save by configuring server timeouts and improving error handling

[Copilot]

Script save operations were failing with ERR_EMPTY_RESPONSE due to missing HTTP server timeout configuration and inadequate error handling in the file write path.

Changes

Server timeout configuration (back/services/http.ts)

• Set requestTimeout: 300000ms, headersTimeout: 120000ms, keepAliveTimeout: 65000ms to prevent premature connection drops during file operations

Error handling improvements (back/api/script.ts, back/shared/utils.ts)

• Added error logging in PUT /api/scripts endpoint
• Restructured writeFileWithLock with proper try-catch-finally blocks for file handle and lock cleanup
• Enhanced error messages with context (file path, operation type)
• Ensured file handles always close and locks always release, even on failure

Type safety (back/shared/utils.ts)

• Added explicit FileHandle type annotation
• Changed nullable types to undefined for clearer semantics

Example

Before: File write errors could leave locks unreleased or file handles open, causing subsequent operations to hang or fail.

After:

try {
  await writeFileWithLock(filePath, content);
  return res.send({ code: 200 });
} catch (e) {
  logger.error('🔥 error saving script: %o', e);
  return next(e);  // Proper error propagation to middleware
}

Locks and file handles are guaranteed to be cleaned up via finally blocks, with distinct error messages for each failure point (create file, acquire lock, write file).

Original prompt

---

This section details on the original issue you should resolve

<issue_title>临时编辑脚本，无法保存，之前版本也出现过这种问题</issue_title>
<issue_description>### Qinglong version

v2.19.2-debian

Steps to reproduce

环境

• 版本正式版 v2.19.2
• 更新时间2025-06-27 23:59
• docker 容器部署，使用debian镜像

网络请求，脚本内容已删除，应该与内容无关，其他脚本也一样报错

What is expected?

怎么解决这个问题，之前的版本也出现过这个问题

What is actually happening?

1

System Info

Any additional comments?

No response</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes 临时编辑脚本，无法保存，之前版本也出现过这种问题 #2883

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
qinglong	Ready	Preview, Comment	Dec 27, 2025 8:51am
qinglong-back	Ready	Preview, Comment	Dec 27, 2025 8:51am