kotlinlang #kotlin-fuel

) not return the actual object that is the result of the call? Also, what are the thoughts on how to mock/stub Fuel calls so that unit tests can be written for classes/functions that need to make http calls?

jkwatson

12/30/2015, 11:42 PM

and, how to you include http headers in requests?

yoavst

12/31/2015, 5:11 AM

I wrap fuel with an object implements interface I can mock

yoavst

12/31/2015, 5:14 AM

Call

headers(...)

before

responseX

yoavst

12/31/2015, 5:15 AM

I think it receives map of string to string

jkwatson

12/31/2015, 5:23 AM

So, how do you get objects back out of the

responseObject

method? Does that require some wrapping as well?

kittinunf

12/31/2015, 7:45 AM

@jkwatson: when you gets response back, it is in a

Result<T, FuelError>

. Can you decompose it with

val (data, error) = result

kittinunf

12/31/2015, 7:45 AM

Copy code

… .responseObject(deserializer()) { request, response, result ->
            val (data, error) = result
        }

mplatvoet

12/31/2015, 8:47 AM

Why are some properties marked as

lateinit

? For instance the

Response

class has

lateinit var url

mplatvoet

12/31/2015, 8:51 AM

is it to avoid nullable types?

yoavst

12/31/2015, 12:56 PM

I guess it is

jkwatson

12/31/2015, 3:49 PM

@kittinunf: Yes, I understand that part. But, I need to get it out of the callback function and return it to other parts of my app. What is the suggested pattern for that usage?

jkwatson

12/31/2015, 3:55 PM

Basically, I need to do something more than just print out the result. I need to actually use the result of the http call elsewhere in the application, and possibly return it to the user of my own API.

yoavst

12/31/2015, 6:41 PM

You can send the result object

jkwatson

12/31/2015, 9:37 PM

yes, but how do I get it out of the callback function so I can do that? The only way I can see is to have a var outside the call to

responseObject

and then assign to it inside the callback function. That seems really kludgy, though.

jkwatson

01/01/2016, 12:13 AM

Here’s a concrete example. How would I implement this to make it return something:

Copy code

fun getAThing(): String {
    val request: Request = Fuel.get("<http://httpbin.org/get>").responseString { request, response, result ->
        //do something with response
        result.fold({ d ->
            val endResult = d  // how do I return this from the function?
        }, { err ->
            //do something with error
        })
    }
    return ???
}

yoavst

01/01/2016, 5:15 AM

Make your api receive in the method a callback object.

jkwatson

01/01/2016, 5:19 AM

Hm. Well, if that’s the way to do it, then fuel is not the API for me. Thanks!

yoavst

01/01/2016, 10:47 AM

So you want not an async api?

kittinunf

01/01/2016, 2:30 PM

@jkwatson: you need a sync api perhaps right, if I do understand you correctly.