Use serveral URLCredentials for different protection spaces

Source/Request.swift

@@ -106,6 +106,8 @@ public class Request {
  var responseSerializerProcessingFinished = false
  /// `URLCredential` used for authentication challenges.
  var credential: URLCredential?
+ /// All `URLCredential` added by a authenticationMethod of the protection space used for authentication challenges.
+ var credentialsByAuthenticationMethod: [String: URLCredential] = [:]
  /// All `URLRequest`s created by Alamofire on behalf of the `Request`.
  var requests: [URLRequest] = []
  /// All `URLSessionTask`s created by Alamofire on behalf of the `Request`.
@@ -183,7 +185,12 @@ public class Request {
  get { mutableState.credential }
  set { mutableState.credential = newValue }
  }
-
+
+ public private(set) var credentialsByAuthenticationMethod: [String:URLCredential] {
+ get { mutableState.credentialsByAuthenticationMethod }
+ set { mutableState.credentialsByAuthenticationMethod = newValue }
+ }
+
  // MARK: Validators
 
  /// `Validator` callback closures that store the validation calls enqueued.
@@ -757,6 +764,19 @@ public class Request {
  return self
  }
 
+ /// Associates the provided credential for a specific authenticationMethod with the instance.
+ ///
+ /// - Parameter credential: The `URLCredential`.
+ /// - Parameter authenticationMethod: The authenticationMethod as `String`. See Foundation.NSURLProtectionSpace for possible values.
+ ///
+ /// - Returns: The instance.
+ @discardableResult
+ public func authenticate(with credential: URLCredential, for authenticationMethod: String) -> Self {
+ mutableState.credentialsByAuthenticationMethod[authenticationMethod] = credential
+
+ return self
+ }
+
  /// Sets a closure to be called periodically during the lifecycle of the instance as data is read from the server.
  ///
  /// - Note: Only the last closure provided is used.
@@ -985,6 +1005,11 @@ extension Request {
  } else {
  if let credential = credential, let user = credential.user, let password = credential.password {
  components.append("-u \(user):\(password)")
+ } else {
+ for credential in credentialsByAuthenticationMethod.values {
+ guard let user = credential.user, let password = credential.password else { continue }
+ components.append("-u \(user):\(password)")
+ }
  }
  }
  }

Source/Session.swift

@@ -1240,8 +1240,9 @@ extension Session: SessionStateProvider {
 
  func credential(for task: URLSessionTask, in protectionSpace: URLProtectionSpace) -> URLCredential? {
  dispatchPrecondition(condition: .onQueue(rootQueue))
-
- return requestTaskMap[task]?.credential ??
+
+ return requestTaskMap[task]?.credentialsByAuthenticationMethod[protectionSpace.authenticationMethod] ??
+ requestTaskMap[task]?.credential ??
  session.configuration.urlCredentialStorage?.defaultCredential(for: protectionSpace)
  }