RangeError：无效的状态代码：0 节点 js

Question

我被这个问题困住了，看看是否有人可以提供帮助。我有这个 Node.js 应用程序，当我提交表单并转到注册部分时，我收到此错误：

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:574:10)
    at ServerResponse.send (C:\projects\authentication\node_modules\express\lib\response.js:211:10)
    at ServerResponse.json (C:\projects\authentication\node_modules\express\lib\response.js:256:15)
    at C:\projects\authentication\app.js:24:7
    at Layer.handle_error (C:\projects\authentication\node_modules\express\lib\router\layer.js:71:5)
    at trim_prefix (C:\projects\authentication\node_modules\express\lib\router\index.js:315:13)
    at C:\projects\authentication\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (C:\projects\authentication\node_modules\express\lib\router\index.js:335:12)

这是 app.js

var express = require('express');
var app = express();
var bodyParser = require('body-parser');

// include routes
var routes = require('./routes/router');
app.use('/', routes);
app.use('/register', routes);

// serve static files from /public
app.use(express.static(__dirname + '/template'));

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('File Not Found');
  err.status = 404;
  next(err);
});

// error handler
// define as the last app.use callback
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.json('error', {
    message: err.message,
    error: {}
  });
});

/////// JSON parser
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

app.use(function (req, res) {
  res.setHeader('Content-Type', 'text/plain');
  res.write('you posted:\n');
  res.end(JSON.stringify(req.body, null, 2));
});


// listen on port 3000 setting server
app.listen(3000, function () {
  console.log('Express app listening on port 3000');
});


to handle the http request i have a route.js file, wich is like this:
var express = require('express');
var router = express.Router();
var path = require('path');


// GET /
router.get('/', function(req, res, next) {
   //res.setHeader('Content-type','text/plain');
   return res.sendFile(path.join(__dirname + "/../index.html"));
});

router.post('/register', function(req, res){

    //console.log(req.body);
    return res.send(req.body.email);
    /*
    if (req.body.email &&
      req.body.username &&
      req.body.password &&
      req.body.passwordConf) {
          var userData = {
            email: req.body.email,
            username: req.body.username,
            password: req.body.password,
            passwordConf: req.body.passwordConf
          };
  //use schema.create to insert data into the db
      User.create(userData, function (err, user) {
        if (err) {
          return next(err);
        } else {
          return res.redirect('/profile');
        }
      });
    }*/
});


module.exports = router;

当我尝试通过根目录上的 get 请求访问时'/' 它用一个表单打开 html，这个表单转到 '/register' 所以我得到错误，我如何通过 get 获取 html 文件有点奇怪在 root 上，但是当我尝试访问 '/register' 时，我只收到这个错误，已经尝试了很多东西，但我不知道我做错了什么，希望我能得到一些帮助。

HTML文件

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:574:10)
    at ServerResponse.send (C:\projects\authentication\node_modules\express\lib\response.js:211:10)
    at ServerResponse.json (C:\projects\authentication\node_modules\express\lib\response.js:256:15)
    at C:\projects\authentication\app.js:24:7
    at Layer.handle_error (C:\projects\authentication\node_modules\express\lib\router\layer.js:71:5)
    at trim_prefix (C:\projects\authentication\node_modules\express\lib\router\index.js:315:13)
    at C:\projects\authentication\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (C:\projects\authentication\node_modules\express\lib\router\index.js:335:12)

Answer 1

看一下堆栈跟踪：

RangeError: Invalid status code: 0
    at ServerResponse.writeHead (_http_server.js:192:11)
    ...
    at C:\projects\authentication\app.js:24:7

好的，所以错误是在第 24 行引起的app.js，也就是这个：

  res.json('error', {
    message: err.message,
    error: {}
  });

Express 试图将其解释'error'为状态代码（因为较旧版本的 Express 已接受res.json(status, obj)，已被弃用），并且由于它看起来不像数字，因此在内部将其转换为数字“0”，这是无效状态代码，因此错误。

我猜你的意思是：

  res.json({
    message: err.message,
    error: {}
  });

编辑：至于您的其他错误，您需要确保在路由之前body-parser声明中间件：

var bodyParser = require('body-parser');

/////// JSON parser
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));

// include routes
var routes = require('./routes/router');
app.use('/', routes);
app.use('/register', routes);

否则，请求将不会在到达您的路由处理程序之前通过该中间件。