承諾沒有得到解決，而發送http請求

Question

我打電話func2（應該返回承諾），但承諾沒有得到解決。我解決承諾錯誤或有任何其他問題。請讓我知道什麼是以下問題碼？

  function func1() { 

       func2().then(function (data) { 
        console.log(data); 
       }) 

      } 

      var func2 = function() { 
       var d = q.defer(); 
       var postRequest = { 
        host: "abc", 
        path: "/xyz", 
       }; 

       var buffer = ""; 

       var req = http.request(postRequest, function(res) { 
        var buffer = ""; 
        res.on("data", function(data) { 
        console.log("data\n"); 
        buffer = buffer + data; 
        }); 
        res.on("end", function(data) { 
         d.resolve(data); 
         return d.promise; 
        }); 
       }); 

       console.log('after req'); 
       req.write(body); 
       req.end(); 
      }; 

Answer 1

您需要在函數的最後返回承諾。嘗試

function func1() { 

    func2().then(function (data) { 
     console.log(data); 
    }).catch(function (error) { 
     // Handle any error from all above steps 
     console.log("Got error:" + error); 
    }) 
    .done(); 

} 

var func2 = function() { 
    var d = q.defer(); 
    var postRequest = { 
     host: "abc", 
     path: "/xyz", 
    }; 

    var buffer = ""; 

    var req = http.request(postRequest, function(res) { 
     var buffer = ""; 
     res.on("data", function(data) { 
     console.log("data\n"); 
     buffer = buffer + data; 
     }); 
     res.on("end", function(data) { 
      d.resolve(buffer); 
     }); 
     res.on("error", function(err) { 
      d.reject(err); 
     }); 
    }); 

    console.log('after req'); 
    req.write(body); 
    req.end(); 

    return d.promise; 

};