err_http_headers_sent erorr在express js中

发布于 2025-02-08 11:50:05 字数 926 浏览 0 评论 0原文

我在Express上工作了REST API，

我在下面的项目中写了一个自定义错误处理程序

function errorHandler(err, req, res, next) {
 if (res.headersSent) return next(err);
 res.status(500);
 res.send("error", { error: err }); 
}

，并且我故意犯了一个错误，以测试我的自定义错误处理程序是否正常工作

res.json({
 _id: user._id,
 username: user.username,
 email: user.email,
 token: generateToken(user.id, "ACCESS_TOKEN_SECRET", "20s"),
});

res.cookie("jwt", newRefreshToken, {
 httpOnly: true,
 secure: true,
 sameSite: "None",
 maxAge: 24 * 60 * 60 * 1000,
});

[我发送了响应，该响应已经设置了响应标题然后，我再次尝试通过res.cookies设置标题。最终导致标题发送错误]

现在我的问题是在我的自定义错误处理程序中，我通过（res.headerssent）返回下一个错误处理此错误（“ err ”）;

但是我仍然会遇到错误，应用程序崩溃了。

因此，请让我知道如何以正确的方式处理它。

原文

I was working on REST API in express

I wrote a custom error handler as below in my project

function errorHandler(err, req, res, next) {
 if (res.headersSent) return next(err);
 res.status(500);
 res.send("error", { error: err }); 
}

and i intentionally made a mistake as below to test whether my custom error handler is working

res.json({
 _id: user._id,
 username: user.username,
 email: user.email,
 token: generateToken(user.id, "ACCESS_TOKEN_SECRET", "20s"),
});

res.cookie("jwt", newRefreshToken, {
 httpOnly: true,
 secure: true,
 sameSite: "None",
 maxAge: 24 * 60 * 60 * 1000,
});

[I sent the response which already set the response header and then I again tried to set the headers by res.cookies eventually which results in headers sent error]

Now my question is in my custom error handler I handled this error by if (res.headersSent) return next("err");

But still I am getting error and app gets crashed.

So, Please let me know how to handle this in right way.