使用異步與http.get，節點JS

Question

我有這樣的陣列REST的API的路徑：

var paths = ['path1','path2','path3']; 

我想創建與來自每個路徑的結果的數組。在這種情況下，我改用「http://www.google.com/index.html」而不是「路徑」

exports.test = function(req, res){ 

    var paths = ['path1','path2','path3']; 

    var resultArr = []; 
    async.each(paths, function(path, cb){ 

    console.log('collecting data from: ' + path); 
    http.get('http://www.google.com/index.html', function(result){ 

     resultArr.push(result); 
     console.log('Done collecting data from: ' + path); 
     cb(); 
    }); 

    }, function(){ 
    console.log('Done collecting data from all paths'); 
    res.status(200).send('hello'); 
    }); 
}; 

這將記錄：

Starting server at 127.0.0.1:5000 
collecting data from: path1 
collecting data from: path2 
collecting data from: path3 
Done collecting data from: path2 
Done collecting data from: path1 
Done collecting data from: path3 
Done collecting data from all paths 
GET /test 304 128.752 ms - - 

它不等待調用完成。我想要一個接一個地看到結果。我究竟做錯了什麼？

Answer 1

變化每個到每個系列。

exports.test = function(req, res){ 

    var paths = ['path1','path2','path3']; 

    var resultArr = []; 
    async.eachSeries(paths, function(path, cb){ 

    console.log('collecting data from: ' + path); 
    http.get('http://www.google.com/index.html', function(result){ 

     resultArr.push(result); 
     console.log('Done collecting data from: ' + path); 
     cb(); 
    }); 

    }, function(){ 
    console.log('Done collecting data from all paths'); 
    res.status(200).send('hello'); 
    }); 
}; 

這將記錄：

collecting data from: path1 
Done collecting data from: path1 
collecting data from: path2 
Done collecting data from: path2 
collecting data from: path3 
Done collecting data from: path3 
Done collecting data from all paths