Question

我坚持这个问题，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'/'上的get请求访问它时打开带有表单的html，这个表单转到'/ register'然后我得到错误，我有点奇怪我怎么得到html文件罚款通过root，但当我尝试访问'/ register'我只得到这个错误，已经尝试了很多东西，我不能做我做错了什么，希望我能得到一些帮助。感谢。

Answer 1

看看堆栈跟踪：

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

好的，所以错误是由app.js的第24行引起的，就是这个错误：

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

Express试图将'error'解释为状态代码（因为旧版本的Express接受res.json(status, obj)已被弃用），并且因为它不是看起来像数字的东西，所以内部会得到转换为数字“0”，这是一个无效的状态代码，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，您需要确保在路线之前宣布body-parser中间件为：

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，请求在到达路由处理程序之前不会通过该中间件传递。

Answer 2

这是HTML文件

</head>
<body>
    <form action="/register" method="post">
        <div>
            <label for="email">email:</label>
            <input type="email" name="email" id="email" />
        </div>
        <div>
            <label for="username">username:</label>
            <input type="text" name="username" id="username" />
        </div>
        <div>
            <label for="password">password:</label>
            <textarea id="password" name="password"></textarea>
        </div>
        <div>
            <label for="passwordConf">password again:</label>
            <textarea name="passwordConf" id="passwordConf"></textarea>
        </div>
        <div class="button">
            <button type="submit">submit</button>
        </div>
    </form>
</body>
</html>

RangeError：无效的状态代码：0个节点js

2 个答案: