RangeError，语法错误：无效的正则表达式

Posted 2023-03-07

【中文标题】RangeError，语法错误：无效的正则表达式

【英文标题】：RangeError, Syntax error: invalid regular expression

【发布时间】：2019-01-05 17:42:22

【问题描述】：

嗨，

我一直在关注平均堆栈上的 this tutorial。

但是，经过第 7 步后，我发现自己遇到了一个无法解决的错误。

当尝试获取路径 "/shows/:id" 时，Chrome 偶然发现了一个错误循环并且什么都不做：

RangeError: Maximum call stack size exceeded
SyntaxError: Invalid regular expression: /^\d+$/: Stack overflow

Mozilla 在执行相同操作时会给出以下错误消息：

[invalid object] <div ng-view="" class="ng-scope">

我不确定我应该在此处复制什么代码示例，因为我已按照教程的每个步骤进行操作并检查了是否有任何错误。

但是，我使用了 TMDB api 而不是教程中提出的，并做了一些调整。

这是服务器和路由代码：

var express = require('express');
var path = require('path');
var bodyParser = require('body-parser');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var mongoose = require('mongoose');
var bcrypt = require('bcryptjs');
var async = require('async');
var request = require('request');
var xml2js = require('xml2js');
var _ = require('lodash');

// MONGOOSE
var showSchema = new mongoose.Schema(
  _id: Number,
  name: String,
  createdBy: String,
  nextEpisodeToAir: String,
  airsTime: String,
  firstAired: Date,
  genre: [String],
  network: String,
  overview: String,
  rating: Number,
  ratingCount: Number,
  status: String,
  poster: String,
  subscribers: [
    type: mongoose.Schema.Types.ObjectId, ref: 'User'
  ],
  seasonsCount: Number,
  episodesCount: Number,
  episodes: [
    season: Number,
    episodeNumber: Number,
    episodeName: String,
    firstAired: Date,
    overview: String
  ]
);

var userSchema = new mongoose.Schema(
  email: 
    type: String,
    unique: true
  ,
  password: String
);

userSchema.pre('save', function(next) 
  var user = this;
  if (!user.isModified('password')) return next();
  bcrypt.genSalt(10, function(err, salt) 
    if (err) return next(err);
    bcrypt.hash(user.password, salt, function(err, hash) 
      if (err) return next(err);
      user.password = hash;
      next();
    );
  );
);

// compare passwords
userSchema.methods.comparePassword = function(candidatePassword, cb) 
  bcrypt.compare(candidatePassword, this.password, function(err, isMatch) 
    if (err) return cb(err);
    cb(null, isMatch);
  );
;

// models
var User = mongoose.model('User', userSchema);
var Show = mongoose.model('Show', showSchema);

// connect
mongoose.connect('mongodb://localhost:27017/shows', useNewUrlParser: true);

var app = express();

app
    .set('port', process.env.PORT || 3000)
    .use(logger('dev'))
    .use(bodyParser.json())
    .use(bodyParser.urlencoded(extended: true))
    .use(cookieParser())
    .use(express.static(path.join(__dirname, 'public')));


// REST routes
app.get('/api/shows', function(req, res, next) 
  var query = Show.find();
  if (req.query.genre) 
    query.where(genre: req.query.genre);
   else if (req.query.alphabet) 
    query.where(name: new RegExp('^' + '[' + req.query.alphabet + ']', 'i'));
   else 
    query.limit(12);
  
  query.exec(function(err, shows) 
    if (err) return next(err);
    res.send(shows);
  );
);

app.get('/api/shows/:id', function(req, res, next) 
  Show.findById(req.params.id, function(err, show) 
    if (err) return next(err);
    res.send(show);
  );
);

app.post('/api/shows', function(req, res, next) 
  //themoviedb.org API
  const apiKey = 'c230f35fe557299c704ef84fe35aa8fa';
  const urlTMDB = 'https://api.themoviedb.org/3/';  
/*
    1. Get the Show ID given the Show Name and pass it on to the next function.
    2. Get the show information using the Show ID from previous step and pass the new show object on to the next function.
    3. Convert the poster image to Base64, assign it to show.poster and pass the show object to the final callback function.
    4. Save the show object to database.
*/
    async.waterfall([
      function(cb) 
        // Get the show ID
 
        let options = 
          method: 'GET',
          url: urlTMDB + 'search/tv',
          qs: 
            query: req.body.showName,
            api_key: apiKey
          ,
          body: ''
        ;
    
        request(options, function(err, res, body) 
          if (err) throw new Error(err);
          let data = JSON.parse(body);
          // console.log(data.total_results);
          if(data.total_results === 0) 
            return req.res.status(404).send(message: req.body.showName + ' was not found.');
          
          let seriesId = data.results[0].id;
          // console.log('id:' + seriesId);
          cb(err, seriesId);
        );
      ,
      function(seriesId, cb) 

        // Get Show info
        let options = 
          method: 'GET',
          url: urlTMDB + 'tv/' + seriesId,
          qs: api_key: apiKey,
          body: ''
        

        request(options, function(err, res, body) 
          if (err) throw new Error(err);
          let data = JSON.parse(body);
          // Creating genres array because don't know how to fix this inline
          let genres = [];
          data.genres.forEach(g => 
            genres.push(g.name);
          );
          let show = new Show(
            _id: data.id,
            name: data.original_name,
            createdBy: data.created_by,
            nextEpisodeToAir: data.next_episode_to_air,
            airsTime: data.episode_run_time,
            firstAired: data.first_air_date,
            genre: genres,
            network: data.networks[0].name,
            overview: data.overview,
            rating: data.vote_average,
            ratingCount: data.vote_count,
            status: data.status,
            poster: 'https://image.tmdb.org/t/p/w500/' + data.poster_path,
            seasonsCount: data.number_of_seasons,
            episodesCount: data.number_of_episodes
          );
          // console.log(show);
          cb(err, seriesId, show);
        );
      ,
      function(err, show) 
        show.save(function(err) 
          if (err) 
            if (err.code == 11000) 
              return res.status(409).send(message: show.name + ' already exists.');
            
            return next(err);
          
          res.sendStatus(200);
        );
      
    ]);
  );

// handles bad routes and redirect
// using * (wild card)
// KEEP THIS ATER ALL OTHER ROUTES

app.get('*', function(req, res) 
  res.redirect('/#' + req.originalUrl);
);



// Stack trace of errors
app.use(function(err, req, res, next) 
  console.error(err.stack);
  res.status(500).send(message: err.message);
);


app.listen(app.get('port'), function() 
  console.log('Express server listening on port ' + app.get('port'));
);

这是我的细节控制器：

angular.module('MyApp')
    .controller('DetailCtrl', ['$scope', '$rootScope', '$routeParams', 'Show', 'Subscription', 
        function($scope, $rootScope, $routeParams, Show, Subscription) 
            Show.get(_id: $routeParams.id, function(show) 
                $scope.show = show;

                $scope.isSubscribed = function() 
                    return $scope.show.subscribers.indexOf($rootScope.currentUser._id) !== -1;
                ;

                $scope.subscribe = function() 
                    Subscription.subscribe(show).success(function() 
                        $scope.show.subscribers.push($rootScope.currentUser._id);
                    );
                ;

                $scope.unsubscribe = function() 
                    Subscription.unsubscribe(show).success(function() 
                        let index = $scope.show.subscribers.indexOf($rootScope.currentUser._id);
                        $scope.show.subscribers.splice(index, 1);
                    );
                ;


                
                $scope.nextEpisode = show.episodes.filter(function(episode0) 
                    return new Date(episode.firstAired) > new Date();
                )[0];


            );
    ]);

希望对这个问题有所了解：/ 谢谢大家的帮助！

【问题讨论】：

您说您正在访问/show/:id，但不应该是/shows/:id？另外，您是否尝试过清理缓存并重新加载页面？其他浏览器呢？ （我问这个因为你提到 Chrome 的方式让我觉得在其他浏览器中运行良好，只是想澄清一下）

thx @adoltotcar，我更正了描述中的错误，我正在访问的是真正的“/shows/:d”。关于浏览器，mozilla 给我这个错误信息： [invalid object] 然后，清除缓存没有帮助：/

【参考方案1】：

天哪，我觉得自己好傻。

Mozilla 错误消息让我感到不安，因为它指向了视图代码。 在检查我的模块代码时，我发现我在访问 /shows/:id 时应该使用的视图名称中打错了。

现在一切正常。抱歉打扰了:)