app.get('/selectCw',function (req,res) {
console.log(req.query.username);
var josn = {};
console.log("select:"+userArr);
for (var i = 0;i < userArr.length;i++){
if (req.query.username == userArr[i].username){
caiwuConn.select("tb_finance",function (a) {
josn = {"userLoginCode":1,"content":a};
return res.send(josn);
});
} else{
josn = {"userLoginCode":0,"content":"非法用户"};
return res.send(josn);
}
}
});
报错：
Can't set headers after they are sent.

可能是res.send了好几次