Question

您好，我在这里遇到了一些小问题，我只是在点击“添加到购物车”按钮，然后快速按下手机上的“后退”按钮时发现了这一点。

通过http.dart在flutter上调用post API时，出现以下错误： “未处理的异常：在收到完整的标头之前，连接已关闭”

RaisedButton(
   child: Text("add to cart"),
      onPressed: () async{
                 await funcAddToCart(widget.buCode,widget.tenantCode,widget.prodId,itemCount,loadItemData[index]['prodPrice']);
                        },
                      )

//my function call after button click
Future funcAddToCart(buCode,tenantCode,prodId,itemCount,price) async{
   int customerId = 12;
   Map data = {
     'customerId':customerId,
     'buCode':buCode,
     'tenantCode':tenantCode,
     'prodId':prodId,
     'itemCount':itemCount,
     'price':price
   };
   //encode Map to JSON
   var body = json.encode(data);
   await http.post('http://172.0.0.1:3000/addToCart',
       headers: {"Content-Type": "application/json"},
       body: body
   );
 }


// my node js route that receive the post call 

router.post('/addToCart', function (req, res) {
var customerId = req.body.customerId;
    var buCode = req.body.buCode;   
    var tenantCode = req.body.tenantCode;   
    var prodId = req.body.prodId;   
    var itemCount = req.body.itemCount;  
    var price = req.body.price; 

    db.query("INSERT INTO app_cart (customerId,buId,tenantId,productId,quantity,price,createdAt,updatedAt) VALUES (? ,? ,? ,? ,? ,? ,? ,?)",['12',buCode,tenantCode,prodId,itemCount,price,new Date(), new Date()], function (err, result, fields) {
                if (err) throw err;
              });
})

未处理的异常：在接收到完整的标题之前，连接已关闭

0 个答案: