unable to retrieve request param in node js - angularjs

Question

In my angular js factory, i am making an ajax call to transfer the input model value to the server side ( node js) but when i try to retrieve it , i see 'undefined' .
angular js :
angular.module('name-App').factory('myService', function($http,$rootScope) {
return {
getFoos: function(stock) {
console.log("----------->"+stock.toString());//displays the value correctly over here .
//return the promise directly.
return $http({
url:'http://localhost:3000/gethistorydata',
method: "GET",
params: stock
}).then(function(result) {
alert("result.data"+result.data);
return result.data;
}).catch(function(fallback) {
alert("failed"+fallback + '!!');
});
}
}
});
In node js i have below :
app.get('/gethistorydata',function(req,res){
console.log("--------------->>>>>>");
console.log("stock name = "+req.params.data);
//res.cookie();
//res.sendFile("F:/customer/public/index.html");
});
req.params.data is undefined . whats wrong with syntax?

Answer 1

req.params refers to url path parameters. So you would have to add one to your route for it to be supported. For example a request to /gethistorydata/123 with this route defined(note the added /:id on the end):
app.get('/gethistorydata/:id, function(req, res) {
console.log('my id is ' + req.params.id');
});
would log "my id is 123".
I think you are looking for req.query. What does your stock object look like? If it looked like this {"price": 123} angular would modify the request to look like /gethistorydata?price=123 and you could change your code to this:
app.get('/gethistorydata, function(req, res) {
console.log('my stock price is ' + req.query.price');
});
which would log "my stock price is 123"
See the docs for more examples http://expressjs.com/en/api.html#req.query