Custom ParameterEncodings

[chipsterm]

I have been working with this framework on iOS and am having a compile issue when adding custom parameterEncodings. I was wondering if you could help me out.

My EyeQEndPoints enum does not implement URLRequestConvertible which I believe is ok.

I declare the custom closure as follows:

let xmlParameterEncoding:(URLRequestConvertible, [String: AnyObject]?) -> (NSURLRequest, NSError?) = {(URLRequest, parameters) in {

//this is just to get things working
return (NSURLRequest.URLRequest, nil)
}

In the endpointsClosure, I set the custom closure:

let endpointsClosure = { (target: EyeQEndPoints, method: Moya.Method, parameters: [String: AnyObject]) -> Endpoint in
return Endpoint(URL: url(target), sampleResponse: EndpointSampleResponse.Success(200, target.sampleData), method: method, parameters: parameters, parameterEncoding: .Custom(xmlParameterEncoding))
}

The compiler throws an error on .Custom(xmlParameterEncoding) of

error: type 'URLRequestConvertible' does not conform to protocol 'URLRequestConvertible'
return Endpoint(URL: url(target), sampleResponse: EndpointSampleResponse.Success(200, target.sampleData), method: method, parameters: parameters, parameterEncoding: .Custom(xmlParameterEncoding))

Thanks for your help.

[ashfurrow]

Hi there! Got your email too. I'll take a look as soon as I can. Happy holidays!

[orta]

Would strongly recommend taking a look at the Eidolon source code to see if it has something that you're looking for.

[ashfurrow]

Hmm. Eidolon uses the default parameter encoding, so it won't be much help. I'm trying out your sample code now and I'll let you know what I find.

[ashfurrow]

OK, I think I've got things working. First, the URLRequestConvertible actually belongs to Alamofire, so you need to have import Alamofire at the top of your file. This is a leaky abstraction on my part – I'll open an issue.

OK, so now for some Swift stuff. The syntax surrounding closures as variables is ... not intuitive 😄 I played around with things until I got the following to work:

let xmlParameterEncoding: (URLRequestConvertible, [String: AnyObject]?) -> (NSURLRequest, NSError?) = { convertible, parameters -> (NSURLRequest, NSError?) in
    //this is just to get things working
    return (convertible.URLRequest, nil)
}

let closure = { (target: EyeQEndPoints, method: Moya.Method, parameters: [String: AnyObject]) -> Endpoint< EyeQEndPoints> in
    return Endpoint< EyeQEndPoints>(URL: url(target), sampleResponse: .Success(200, target.sampleData), method: method, parameters: parameters, parameterEncoding: Moya.ParameterEncoding.Custom(xmlParameterEncoding))
}

let abcd = MoyaProvider(endpointsClosure: closure )

A few important notes: the xmlParameterEncoding closure has the variables names, not types, after the {, and I had to fully qualify the .Custom with Moya.ParameterEncoding, since Alamofire exposes an identical enum with the same name.

But that should do it! Let me know if I can clarify anything.

[chipsterm]

Thank you for the response. I figured that out shortly after I created the ticket.

[ashfurrow]

Awesome! I'll close this. Feel free to reopen or open a new issue if you have other questions.