How can I log each request/response using Alamofire?

Question

Is there a way to log each request / response using Alamofire (something similar to AFNetworkActivityLogger) ?

I am aware of Printable, DebugPrintable and Output (cU

Answer 1

Since Alamofire 5, the easiest way is to define an EventMonitor subclass:

final class AlamofireLogger: EventMonitor {
    func requestDidResume(_ request: Request) {
        let body = request.request.flatMap { $0.httpBody.map { String(decoding: $0, as: UTF8.self) } } ?? "None"
        let message = """
        ⚡️ Request Started: \(request)
        ⚡️ Body Data: \(body)
        """
        NSLog(message)
    }

    func request<Value>(_ request: DataRequest, didParseResponse response: DataResponse<Value>) {
        NSLog("⚡️ Response Received: \(response.debugDescription)")
    }
}

Then use it on your session:

let session = Session(eventMonitors: [ AlamofireLogger() ])

This sample code was adapted from https://github.com/Alamofire/Alamofire/issues/2867#issuecomment-509662892

Answer 2

SOLUTION FOR SWIFT 3.0+

For Printing Request parameter and headers:

Alamofire.request(url, method: .get, parameters: parameters, headers: headers)
            .validate()
            .responseObject { (response: DataResponse<T>) in
                self.pendingRequests.removeValue(forKey: endPoint)
                completion!(response)

                if(NetworkConfig.loggingEnable) {
                    debugPrint("************* printing REQUEST parameter and Headers *************")
                    debugPrint("RESPONSE : \(response.debugDescription)")
                }
        }.responseDebugPrint()

For Printing Response . use below extension .

import Foundation
import Alamofire

extension Alamofire.DataRequest {
    func responseDebugPrint() -> Self {
        if NetworkConfig.loggingEnable {

            return responseJSON() {
                response in
                if let  JSON = response.result.value,
                    let JSONData = try? JSONSerialization.data(withJSONObject: JSON, options: .prettyPrinted),
                    let prettyString = NSString(data: JSONData, encoding: String.Encoding.utf8.rawValue) {
                    print(prettyString)
                } else if let error = response.result.error {
                    print("Error Debug Print: \(error.localizedDescription)")
                }
            }
        }
        return self
    }
}

Small gist for you : https://gist.github.com/manishpathak99/348f2eb0167c0ff6e12ecd667612bc9b/edit