如何從目錄中讀取文件並將其作爲JSON發送給客戶端？

Question

我有服務器目錄中的日誌文件我想顯示文件名稱到客戶端，所以我創建了readDirectory.js，正在讀取名稱現在我很新node.js，我試圖發送json數據給客戶端，但它沒有發生，如何使用快遞將日誌文件名稱發送給客戶端？

readDirectory.js

var fs = require('fs'); 
var path = './Logs' 
var Logs = []; 
function readDirectory(){ 
    fs.readdir(path, function(err, items) { 
     Logs.push(items); 
     /* console.log(items); 
     for (var i=0; i<items.length; i++) { 
      console.log(items[i]); 
     }*/ 

    }); 
return Logs; 
} 
exports.readDirectory = readDirectory; 

app.js

var express = require('express'); 
    var app = express(); 
    var readDirectory = require('./readDirectory'); 
    app.use(express.static(__dirname + "/public")); 

    app.get('/logs',function(req,res){ 
    res.send(readDirectory.readDirectory()); 
    }); 

angularFactory.js

angular.module('App').factory('DitFactory', function ($http) { 
    'use strict'; 
    var data; 
    return { 
     data:"data from factory" 
     getLogs: function() { 
      return $http.get('/logs') 
       .then(function (response) { 
        return response.data; 
       }); 
     } 
    } 

}); 

Answer 1

您readDirectory.js應該是這樣的：

var fs = require('fs'); 
var path = './Logs' 
var Logs = []; 
function readDirectory(callback){ 
    fs.readdir(path, function(err, items) { 
     Logs.push(items); 
     callback(Logs);  
    }); 
} 
exports.readDirectory = readDirectory; 

和你app.js應該是這樣的：

var express = require('express'); 
var app = express(); 
var readDirectory = require('./readDirectory'); 
app.use(express.static(__dirname + "/public")); 

app.get('/logs',function(req,res){ 
    readDirectory.readDirectory(function(logFiles){ 
     res.json({files : logFiles}); 
    }); 
}); 

希望這個幫助！

Answer 2

你必須把序列化Logs陣列爲JSON並將其發送回客戶端

app.get('/logs',function(req,res){ 
    res.setHeader('Content-Type', 'application/json'); 
    res.send(JSON.stringify(readDirectory.readDirectory())); 
}); 

或者

app.get('/logs',function(req,res){ 
    res.json(readDirectory.readDirectory()); 
});