無法從獲取請求獲取數據時關閉節點上的快速服務器

當用戶輸入城市名稱，或者可以使用您的IP地址獲取當前位置和當前天氣時，此應用將獲取當前天氣。無法從獲取請求獲取數據時關閉節點上的快速服務器

問題：當用戶鍵入一個不存在的城市時，如「jklsafbhjbdsfjhbf」，失敗消息按預期淡入，但隨後服務器關閉，用戶無法再進行更多天氣請求重新啓動終端中的服務器。

我認爲這個問題的地方所在的文件weather.js，或可能在路上，我處理的前端我的GET請求在weatherFetcher.js或後端在我的諾言內在app.js

需要幫助解決這個問題，以便服務器不關閉，用戶可以繼續提出天氣請求。

app.js

var express = require('express'); 
var weather = require('./public/js/weather.js'); 
var location = require('./public/js/location.js'); 
var app = express(); 
var PORT = process.env.PORT || 3000; 
app.use(express.static(__dirname + '/public')); 
app.get('/', function (req, res) { 
    res.send(__dirname + '/public/index.html'); 
}); 
app.listen(PORT, function() { 
    console.log('Express Server Started on port ' + PORT); 
}); 
app.get('/location', function(req, res) { 
    var city = req.query.city; 
    weather(city).then(function (currentWeather) { 
     res.json(currentWeather); 
    }); 
}); 
app.get('/guessweather', function(req, res) { 
    location().then(function (guessedLocation) { 
     weather(guessedLocation).then(function (guessedWeather) { 
      res.json(guessedWeather); 
     }); 
    }); 
});

weather.js

var request = require('request'); 
module.exports = function (location) { 
    return new Promise(function (resolve, reject) { 
     var encodedLocation = encodeURIComponent(location); 
     var url = 'http://api.openweathermap.org/data/2.5/weather?q=' + encodedLocation + '&units=imperial&appid=2de143494c0b295cca9337e1e96b00e0'; 
     if (!location) { 
      return reject('No location provided'); 
     } 
     request({url: url, json: true}, function (error, response, body) { 
      if (error) { 
       return reject('Unable to fetch weather.'); 
      } else { 
       return resolve('The current temperature in ' + body.name + ' is ' + body.main.temp + ' degrees farenheit with humidity at ' + body.main.humidity + '%.'); 
      } 
     }); 
    }); 
};

location.js

var request = require('request'); 
module.exports = function() { 
    return new Promise(function (resolve, reject) { 
     var url = 'http://ipinfo.io'; 
     request({ 
      url: url, 
      json: true 
     }, function (error, response, body) { 
      if (error) { 
       return reject('Unable to fetch location.'); 
      } else { 
       console.log(body.city); 
       return resolve(body.city); 
      } 
     }); 
    }); 
}

個weatherFetcher.js

$(document).ready(function() { 
    $('#success').hide(); 
    $('#failure').hide(); 
    $('#noCity').hide(); 
    $('#findMyWeather').click(function(event) { 
     $('#success').hide(); 
     $('#failure').hide(); 
     $('#noCity').hide(); 
     var $cityName = $('#city').val(); 
     if (typeof $cityName === 'string' && $cityName.length > 0) { 
      $.get('/location?city=' + $cityName, function (data) { 
      }).done(function (data) { 
       $("#success").html(data).fadeIn(); 
       $("#success").prepend('<p id="cityTitle" class="lead">'+ $cityName +'</p>'); 
       $('#city').value = ""; //This doesn't seem to be working 
      }).fail(function() { 
       $("#failure").fadeIn(); 
      }); 
     } else { 
      $("#noCity").fadeIn(); 
     } 
    }); 
    $('#findLocalWeather').click(function(event) { 
     $('#success').hide(); 
     $('#failure').hide(); 
     $('#noCity').hide(); 
     $.get('/guessweather', function (data) { 
      if (data == "") { 
       $("#failure").fadeIn(); 
      } else { 
       $("#success").html(data).fadeIn(); 
      } 
     }); 
    }); 
});

的index.html

<!doctype html> 
<html> 
<head> 
<title>Weather Scraper</title> 
<meta charset="utf-8" /> 
<meta http-equiv="Content-type" content="text/html; charset=utf-8" /> 
<meta name="viewport" content="width=device-width, initial-scale=1" /> 

<!--jQuery & Bootstrap--> 
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script> 
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous"> 
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js" integrity="sha384-0mSbJDEHialfmuBBQP6A4Qrprq5OVfW37PRR3j5ELqxss1yVqOtnepnHVP9aJ7xS" crossorigin="anonymous"></script> 

<!--javascript--> 
<script src="./js/weatherFetcher.js"></script> 

<!--CSS--> 
<link rel="stylesheet" type="text/css" href="./css/weatherStyles.css"> 

</head> 
<body> 
    <div class="container"> 
     <div class="row"> 
      <div id="heading" class="col-md-6 col-md-offset-3 center"> 
       <div id="pageIntro"> 
        <h1 class="middle">Current Weather</h1> 
        <p class="lead center marginTop">Enter a city to get the current weather or click Local Weather</p> 
       </div> 
       <div class="form-group"> 
        <input type="text" class="form-control marginTop" name="city" id="city" placeholder="Eg. London, Venice, Atlanta, Ho Chi Minh City..."> 
       </div> 
       <button id="findMyWeather" class="btn btn-primary btn-lg marginTop">Get Weather by City</button> 
       <button id="findLocalWeather" class="btn btn-primary btn-lg marginTop">Get Your Local Weather</button> 
       <div id="alerts"> 
        <div id="success" class="alert alert-info marginTop"></div> 
        <div id="failure" class="alert alert-danger marginTop">Could not find weather data for that city. Please try again.</div> 
        <div id="noCity" class="alert alert-danger marginTop">Please enter a city</div> 
       </div> 
      </div> 
     </div> 
    </div> 
</body> 
</html>

來源

2016-01-05 Mjuice

添加錯誤回調拒絕承諾

app.get('/location', function(req, res) { 
     var city = req.query.city; 
     weather(city).then(function (currentWeather) { 
      res.json(currentWeather); 
     }, function (error) { 
      res.json(404,error); 
     }); 
    });

而且在weather.js

var request = require('request'); 
module.exports = function (location) { 
    return new Promise(function (resolve, reject) { 
    var encodedLocation = encodeURIComponent(location); 
    var url = 'http://api.openweathermap.org/data/2.5/weather?q=' + encodedLocation + '&units=imperial&appid=2de143494c0b295cca9337e1e96b00e0'; 
    if (!location) { 
     return reject('No location provided'); 
    } 
    request({url: url, json: true}, function (error, response, body) { 
     if (error) { 
     return reject('Unable to fetch weather.'); 
     } 
     if(body.main){ 
     return resolve('The current temperature in ' + body.name + ' is ' + body.main.temp + ' degrees farenheit with humidity at ' + body.main.humidity + '%.'); 
     } 
     return reject(body.message) 
    }); 
    }); 
};

來源

2016-01-05 11:38:30

我添加了這個錯誤回調，但服務器仍然關閉並在控制檯上引發此消息。 /Users/marcushurney/Desktop/node-course/Weather-App/public/js/weather.js:25 \t \t \t \t返回解析（+ body.name + '在當前溫度' '是' +體.main.temp +'degree farenheit with humidity at'+ body.main.humidity +'％。'）; \t \t \t \t^ 類型錯誤：無法讀取屬性「臨時」的未定義 – Mjuice

你能後的console.log（體）的結果？ –

{座標：{經度：-84.39，緯度：33.75}，天氣： [{ID：800，主： '清除'，描述： '天空晴朗'，圖標： '01D'}]，基： '站'，主： {溫度：24.03，壓力：1031，溼度：73， temp_min：19.99， temp_max：28。4}，能見度：16093，風：{速度：3.24，DEG：30}，雲：{所有：1}， DT：1451999483， SYS： {類型：1， ID：760，消息：0.0086，國家： '美國'，日出：1451997779，日落：1452033799}， ID：4180439，名稱： '亞特蘭大'，鱈魚：200} – Mjuice

無法從獲取請求獲取數據時關閉節點上的快速服務器

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