I am working on facebook bot, but I am in no way a node.js developer, this being my first time in using it, because I wanted to get out of my comfort zone for a little bit.
This is my request function
function requestExc() {
var resDictionary = {}
unirest.get("http://openapi.ro/api/exchange/" + queryDict["code"] + ".json")
.query({"date" : queryDict["date"]})
.end(function(res) {
if (res.error) {
console.log('GET error', res.error)
} else {
console.log('GET response', res.body)
resDictionary["rate"] = res.body["rate"]
resDictionary["date"] = res.body["date"]
}
})
console.log("resDictionary IS " + resDictionary)
///prints resDictionary IS [object Object]
return resDictionary
}
so I am trying to get it's result
var response = requestExc()
if (response !== null) {
respondToSender(response, sender)
}
and then act accordingly
function respondToSender(res, sender) {
console.log("RES IS " + res)
//prints RES IS [object Object]
if (res["rate"] === null) {
//do stuff
}
}
but when the variable gets to the respondToSender it's always undefined.
TypeError: Cannot read property 'rate' of undefined
I've also tried with Json.parse() but it's the same thing.
Ok, the problem is unirest (like many node.js modules) works asynchronously meaning that your code is quite probably executed in this order:
var response = requestExc() // request is sent first, ok
if (response !== null) { // this is done second
respondToSender(response, sender)
}
// the response arrived third, when it is not needed
So to deal with such stuff, you have to use callbacks/end
method. See the example here:
unirest.post('http://mockbin.com/request')
.query('name=nijiko')
.query({
pet: 'spot'
})
.end(function (response) {
console.log(response); // this is where you should use respondToSender
});
The console.log(response);
is launched only when reply came and that's what you want.
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