Basic Swift HTTP client

HTTPClient.swift

import Foundation

class HTTPClient: NSObject {
    
    let logging = true
    let session = URLSession.shared
    
    func makeRequest(request: URLRequest, completionHandler: @escaping ([String:AnyObject]?, URLResponse?, Error?) -> Void) {
        
        logRequest(request: request)
        let startTime = Date()
        session.dataTask(with: request as URLRequest) { (data: Data?, response: URLResponse?, error: Error?) -> Void in
            
            self.logResponse(response: response, timeInterval: Date().timeIntervalSince(startTime))
            
            guard let d = data else { completionHandler(nil, response, error); return }
            
            do {
                
                let json = try JSONSerialization.jsonObject(with: d, options: .allowFragments) as! [String:AnyObject]
                completionHandler(json, response, error)
                
            } catch let e as NSError {
                
                completionHandler(nil, response, e)
                
            }
            
        }.resume()
    }
    
    func getJSON(path: String, completionHandler: @escaping ([String:AnyObject]?, URLResponse?, Error?) -> Void) {
        
        var request = URLRequest(url: URL(string: path)!)
        request.httpMethod = "GET"
        request.addValue("HTTPClient 1.0", forHTTPHeaderField: "User-Agent")
        
        makeRequest(request: request) { (data: [String:AnyObject]?, response: URLResponse?, error: Error?) -> Void in
            completionHandler(data, response, error)
}
        
    }
    
    func logRequest(request: URLRequest) {
        if logging {
            print("\(request.httpMethod!) '\(request.url!)'")
        }
    }
    
    func logResponse(response: URLResponse?, timeInterval: TimeInterval) {
        if logging {
            if let response = response as? HTTPURLResponse {
                print("\(response.statusCode) '\(response.url!)' \(NSString(format: "[%0.4f s]", timeInterval))")
            }
        }
    }
    
}