javascript - 范围错误 : Invalid status code: 0

Question

我遇到一个问题，在此应用程序上尝试 POST 请求时收到以下错误代码(请记住，我是初学者 node.js/js 程序员):

错误:

[20:22:28] [nodemon] starting `node app.js`
Running server on 3000
Mon, 27 Jun 2016 19:22:31 GMT express deprecated res.send(status, body): Use res.status(status).send(body) instead at routes\edit.js:35:25
c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\mongodb\lib\utils.js:98
    process.nextTick(function() { throw err; });
                                  ^

RangeError: Invalid status code: 0
    at ServerResponse.writeHead (_http_server.js:192:11)
    at ServerResponse._implicitHeader (_http_server.js:157:8)
    at ServerResponse.OutgoingMessage.end (_http_outgoing.js:573:10)
    at ServerResponse.send (c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\express\lib\response.js:204:10)
    at ServerResponse.json (c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\express\lib\response.js:249:15)
    at ServerResponse.send (c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\express\lib\response.js:151:21)
    at c:\Users\Matt\WebstormProjects\ghs_restart\routes\edit.js:35:25
    at c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\mongodb\lib\collection.js:416:18
    at handleCallback (c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\mongodb\lib\utils.js:96:12)
    at c:\Users\Matt\WebstormProjects\ghs_restart\node_modules\mongodb\lib\collection.js:705:5

app.js:

var express = require('express');

var router = express.Router();

var app = express();

var bodyParser = require('body-parser');
app.use( bodyParser.json() );       // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({     // to support URL-encoded bodies
    extended: true
}));

var path = require('path');

var port = process.env.PORT || 3000;

var index = require('./routes/index');
var edit = require('./routes/edit');

app.use('/', index);
app.use('/edit', edit);

app.use(express.static(path.join(__dirname, 'public')));

app.set('view engine', 'jade');

app.set('views', 'views');

app.listen(port, function (err) {
    console.log("Running server on", port);
});

module.exports = index;

以下是我的 edit.js 路线，我认为问题正在发生:

var express = require('express');

var router = express.Router();

var app = express();

var bodyParser = require('body-parser');
app.use( bodyParser.json() );       // to support JSON-encoded bodies
app.use(bodyParser.urlencoded({     // to support URL-encoded bodies
    extended: true
}));

var path = require('path');

var port = process.env.PORT || 3000;

var index = require('./routes/index');
var edit = require('./routes/edit');

app.use('/', index);
app.use('/edit', edit);

app.use(express.static(path.join(__dirname, 'public')));

app.set('view engine', 'jade');

app.set('views', 'views');

app.listen(port, function (err) {
    console.log("Running server on", port);
});

module.exports = index;

Answer 1

我刚才有类似的错误信息，并设法通过更改来解决问题:

res.status(statusCode);

到:

if (statusCode >= 100 && statusCode < 600)
  res.status(statusCode);
else
  res.status(500);

或者只是:

res.status(statusCode >= 100 && statusCode < 600 ? err.code : 500);

即确保您没有尝试设置 invalid HTTP status code某处。

这很可能是问题所在，但您似乎不小心复制了 app.js 代码，而不是在问题中粘贴了 edit.js 代码。