下面是我的请求正文，它是从客户端发送的
var credentials = {
"ConsumerData": {
"ConsumerStoreId": "a",
"ConsumerUserId": "a"
},
"CustomerData": {
"CustomerId": "2345678890"
},
"ErnD": {
"UID": "3",
"TxnDt": "1"
},
"PurD": [{
"ItemCode": "3456tghw3",
"ItemEANCode": "223222122"
},
{
"ItemCode": "8jghw3865",
"ItemEANCode": "3334443222"
}
]
}
为了测试我正在发送var credentials = {}空凭证
在服务器端控制器（节点，express）中我想检查 req.body 是否为空
if(!req.body)
{
console.log('Object missing');
}
if(!req.body.ConsumerData.ConsumerStoreId)
{
console.log('ConsumerStoreId missing');
}
if(!req.body.CustomerData.CustomerId)
{
console.log('CustomerId missing');
}
if(!req.body.ErnD.UID)
{
console.log('UID missing');
}
console.log('outside');
我正在检查一切，但总是只在外面打印
ES2015:
if(req.body.constructor === Object && Object.keys(req.body).length === 0) {
console.log('Object missing');
}
ES2015 之前：
function isEmpty(obj) {
for(var prop in obj) {
if(obj.hasOwnProperty(prop))
return false;
}
return JSON.stringify(obj) === JSON.stringify({});
}
if(isEmpty(req.body)) {
console.log('Object missing');
}
欲了解更多方式es2015 之前 style: https://coderwall.com/p/_g3x9q/how-to-check-if-javascript-object-is-empty https://coderwall.com/p/_g3x9q/how-to-check-if-javascript-object-is-empty
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