How to call custom method right before sessionTask resume in Alamofire

Question

I need to record some data/info when Alamofire called resume to start the request. (I used Swift in my project)

Is there anyway without do method_swizzling?

the timeline will be like this:

Call a request (put in request queue or execute right away) -> [custom method] -> SessionTask.resume()

I know Moya did something similar called WillSend. But I would like to know how to do it without using Moya.

Thank you.

Answer 1

If all you need to do is inspect various request elements you can use Alamofire 5's EventMonitor protocol, which is called during various lifetime events as Alamofire makes requests. There's a built in ClosureEventMonitor which allows you to set closures for those events. For example:

let monitor = ClosureEventMonitor()
monitor.requestDidCompleteTaskWithError = { (request, task, error) in
    debugPrint(request)
}
let session = Session(eventMonitors: [monitor])

Please see our documentation for ClosureEventMonitor and the EventMonitor protocol itself.