[英]Getting parameters passed in the ajax post request
我正在嘗試從一個簡單的html頁面到一個nodejs快遞服務器,這會將值保存到mongo集合。
我傳遞了兩個post參數,即name和email,但是在服務器上我沒有傳遞傳遞的值。
服務器說:
TypeError:無法讀取未定義的屬性“ userName”。 可能是什么問題。
這是我的html文件
<html>
<head>
<script type="text/javascript" src="../scripts/jquery.min.js"></script>
</head>
<body>
<br> User Name :
<input type="text" id="userName" name="userName">
<br>
<br>Email :
<input type="text" id="emailId" name="emailId">
<br>
<br>
<input type="submit" id="addAttrs" value="Add" onclick="addUser()">
</body>
<script type="text/javascript" src="../scripts/client.js"></script>
</html>
這是我在client.js的客戶端ajax post call
function addUser() {
var usrName = document.getElementById("userName").value;
var usrEmail = document.getElementById("emailId").value;
console.log('User name :' + usrName + " Email :" + usrEmail);
var obj = {
'userName': usrName,
'userEmail': usrEmail
};
console.log(JSON.stringify(obj));
$.ajax({
url: '/adduser',
method: 'POST',
data: JSON.stringify(obj),
success: function(data) {
console.log('user created , info :' + data);
},
error: function(data) {
console.log('User creation failed :' + data);
}
});
}
這是我的服務器index.js文件
var express = require('express');
var app = express();
var fs = require('fs');
var path = require('path');
var bodyParser = require('body-parser');
app.use(express.static('public'));
var MongoClient = require('mongodb').MongoClient;
var routes = require('./routes/index');
app.use('/', routes);
app.use(function(req, res, next) {
req.db = db;
next();
});
var myCollection;
var db;
var urlencodedParser = bodyParser.urlencoded({
extended: false
})
var server = app.listen(8081, function() {
db = MongoClient.connect('mongodb://127.0.0.1:27017/test', function(err, db) {
if (err)
throw err;
console.log("connected to the mongoDB !");
myCollection = db.collection('user_collection');
});
var host = server.address().address;
var port = server.address().port;
console.log("Example app listening at http://%s:%s", host, port);
})
module.exports = app;
這是我在router.js文件中處理請求的地方
var express = require('express');
var router = express.Router();
var path = require('path');
router.get('/', function(req, res) {
res.sendFile(path.join(__dirname, '../public/views', 'index.html'));
});
router.get('/userlist', function(req, res) {
var db = req.db;
var collection = db.get('usercollection');
collection.find({}, {}, function(e, docs) {
res.render('userlist', {
"userlist": docs
});
});
});
router.post('/adduser', function(req, res) {
var db = req.db;
console.log(req.body);
var userName = req.body.userName;
var userEmail = req.body.userEmail;
var collection = db.get('usercollection');
collection.insert({
"username": userName,
"email": userEmail
}, function(err, doc) {
if (err) {
res.send("There was a problem adding the information to the database.");
} else {
response = {
message: 'user created successfully',
status: 200
};
res.end(JSON.stringify(response));
}
});
});
module.exports = router;
你應該發送一個json而不是string.Make你這樣的ajax
刪除
JSON.stringify()
或將其JSON.parse(JSON.stringify(obj))
因為您要發送的是字符串(即: typeof req.body是string )。
$.ajax({
url: '/adduser',
method: 'POST',
data:obj,
success: function(data) {
console.log('user created , info :' + data);
},
error: function(data) {
console.log('User creation failed :' + data);
}
});
並在您的服務器端。 使用
app.use(bodyParser.json());
這對於解析application / json類型非常重要。現在我想我會為你工作。
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