如何指定HTTP错误代码？

Question

我试过了:

app.get('/', function(req, res, next) {
    var e = new Error('error message');
    e.status = 400;
    next(e);
});

和:

app.get('/', function(req, res, next) {
    res.statusCode = 400;
    var e = new Error('error message');
    next(e);
});

但总是宣布错误代码为500.

Answer 1

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

<= 3.8

res.statusCode = 401;
res.send('None shall pass');

Answer 2

一个简单的衬垫;

res.status(404).send("Oh uh, something went wrong");

Answer 3

您可以使用res.send('OMG :(', 404);只res.send(404);

Answer 4

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})
});

所以我总是有相同的错误输出格式.

PS:当然你可以创建一个对象来扩展标准错误,如下所示:

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);

Answer 5

与一些(可能是较旧的？)版本捆绑捆绑的errorHandler中间件的版本似乎具有硬编码的状态代码.此处记录的版本:http://www.senchalabs.org/connect/errorHandler.html允许您执行您要执行的操作.所以,也许尝试升级到最新版本的express/connect.

Answer 6

在快递4.0他们说得对:)

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')

Answer 7

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'));

Answer 8

从我在Express 4.0中看到的,这对我有用.这是身份验证所需中间件的示例.

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);
}

Answer 9

Express 已弃用res.send(body, status)。

使用res.status(status).send(body)或res.sendStatus(status)代替

Answer 10

我试过

res.status(400);
res.send('message');

..但它给了我错误：

（节点：208）UnhandledPromiseRejectionWarning：错误：发送后无法设置标头。

这对我有用

res.status(400).send(yourMessage);