node.js 如何指定HTTP错误代码？
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How to specify HTTP error code?
提问by tech-man
I have tried:
我试过了：
app.get('/', function(req, res, next) {
var e = new Error('error message');
e.status = 400;
next(e);
});
and:
和：
app.get('/', function(req, res, next) {
res.statusCode = 400;
var e = new Error('error message');
next(e);
});
but always an error code of 500 is announced.
但总是会公布错误代码 500。
回答by Dan Mandle
Per the Express (Version 4+) docs, you can use:
根据 Express（版本 4+）文档，您可以使用：
res.status(400);
res.send('None shall pass');
http://expressjs.com/4x/api.html#res.status
http://expressjs.com/4x/api.html#res.status
<=3.8
<=3.8
res.statusCode = 401;
res.send('None shall pass');
回答by Mike P
A simple one liner;
一个简单的一个班轮；
res.status(404).send("Oh uh, something went wrong");
回答by Manuel Spigolon
I'd like to centralize the creation of the error response in this way:
我想以这种方式集中创建错误响应：
app.get('/test', function(req, res){
throw {status: 500, message: 'detailed message'};
});
app.use(function (err, req, res, next) {
res.status(err.status || 500).json({status: err.status, message: err.message})
});
So I have always the same error output format.
所以我总是有相同的错误输出格式。
PS: of course you could create an object to extend the standard errorlike this:
PS：当然你可以创建一个对象来扩展这样的标准错误：
const AppError = require('./lib/app-error');
app.get('/test', function(req, res){
throw new AppError('Detail Message', 500)
});
'use strict';
module.exports = function AppError(message, httpStatus) {
Error.captureStackTrace(this, this.constructor);
this.name = this.constructor.name;
this.message = message;
this.status = httpStatus;
};
require('util').inherits(module.exports, Error);
回答by Mustafa
You can use res.send('OMG :(', 404);just res.send(404);
你可以res.send('OMG :(', 404);只使用res.send(404);
回答by catphive
The version of the errorHandler middleware bundled with some (perhaps older?) versions of express seems to have the status code hardcoded. The version documented here: http://www.senchalabs.org/connect/errorHandler.htmlon the other hand lets you do what you are trying to do. So, perhaps trying upgrading to the latest version of express/connect.
与某些（可能是较旧的？）express 版本捆绑在一起的 errorHandler 中间件版本似乎对状态代码进行了硬编码。此处记录的版本：http: //www.senchalabs.org/connect/errorHandler.html另一方面让您可以做您想做的事情。因此，也许尝试升级到最新版本的 express/connect。
回答by Steven Spungin
In express 4.0 they got it right :)
在 express 4.0 中，他们做对了 :)
res.sendStatus(statusCode)
// Sets the response HTTP status code to statusCode and send its string representation as the response body.
res.sendStatus(200); // equivalent to res.status(200).send('OK')
res.sendStatus(403); // equivalent to res.status(403).send('Forbidden')
res.sendStatus(404); // equivalent to res.status(404).send('Not Found')
res.sendStatus(500); // equivalent to res.status(500).send('Internal Server Error')
//If an unsupported status code is specified, the HTTP status is still set to statusCode and the string version of the code is sent as the response body.
res.sendStatus(2000); // equivalent to res.status(2000).send('2000')
回答by Ido Ran
From what I saw in Express 4.0 this works for me. This is example of authentication required middleware.
从我在 Express 4.0 中看到的情况来看，这对我有用。这是需要身份验证的中间件的示例。
function apiDemandLoggedIn(req, res, next) {
// if user is authenticated in the session, carry on
console.log('isAuth', req.isAuthenticated(), req.user);
if (req.isAuthenticated())
return next();
// If not return 401 response which means unauthroized.
var err = new Error();
err.status = 401;
next(err);
}
回答by webarnes
Old question, but still coming up on Google. In the current version of Express (3.4.0), you can alter res.statusCode before calling next(err):
老问题，但仍然出现在谷歌上。在当前版本的 Express (3.4.0) 中，您可以在调用 next(err) 之前更改 res.statusCode：
res.statusCode = 404;
next(new Error('File not found'));
回答by Rajeev Jayaswal
express deprecated res.send(body, status). Use res.status(status).send(body) instead
表示不推荐使用的 res.send(body, status)。使用 res.status(status).send(body) 代替
回答by Tarun Rawat
I tried
我试过
res.status(400);
res.send('message');
..but it was giving me error:
..但它给了我错误：
(node:208) UnhandledPromiseRejectionWarning: Error: Can't set headers after they are sent.
（节点：208）UnhandledPromiseRejectionWarning：错误：发送后无法设置标头。
This work for me
这对我有用
res.status(400).send(yourMessage);
