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Build Status Swift Platform CocoaPods Carthage compatible SwiftPM compatible

  • Automatic networking activity logger
  • intercepting any outgoing requests and incoming responses for debugging purposes.

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  • iOS 8.0+, macOS 10.9+, watchOS 2.0+, tvOS 9.0+
  • Swift 5.0
  • Swift 4.2 (1.7.0)
  • Swift 4.0 (1.5.0)
  • Swift 3.0 (1.0.6)


To run the example project, clone the repo, and run pod install from the Example directory first.



Sniffer is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "Sniffer", '~> 2.0'


For iOS 8+ projects with Carthage

github "Kofktu/Sniffer"


for any requests you make via 'URLSession'

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
  Sniffer.register() // Register Sniffer to log all requests
  return true

for URLSessionConfiguration

let configuration = URLSessionConfiguration.default
Sniffer.enable(in: configuration)

for Custom Deserializer

public protocol BodyDeserializer {
    func deserialize(body: Data) -> String?

public final class CustomTextBodyDeserializer: BodyDeserializer {
    public func deserialize(body: Data) -> String? {
        // customization
        return String?

Sniffer.register(deserializer: CustomTextBodyDeserializer(), for: ["text/plain"])

If you want to process the logs directly in your application

// Register the handler if you want the log to be handled directly by the application
Sniffer.onLogger = { (url, log) in
  print("\(url) : \(log)")

If you want to ignore domains

Sniffer.ignore(domains: [""])



Taeun Kim (kofktu), [email protected]


Sniffer is available under the MIT license. See the LICENSE file for more info.

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