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91 lines
4.1 KiB
91 lines
4.1 KiB
//
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// AuthenticationChallengeResponsable.swift
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// Kingfisher
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//
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// Created by Wei Wang on 2018/10/11.
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//
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// Copyright (c) 2019 Wei Wang <onevcat@gmail.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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import Foundation
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/// Protocol indicates that an authentication challenge could be handled.
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public protocol AuthenticationChallengeResponsable: AnyObject {
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/// Called when a session level authentication challenge is received.
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/// This method provide a chance to handle and response to the authentication
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/// challenge before downloading could start.
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///
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/// - Parameters:
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/// - downloader: The downloader which receives this challenge.
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/// - challenge: An object that contains the request for authentication.
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/// - completionHandler: A handler that your delegate method must call.
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///
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/// - Note: This method is a forward from `URLSessionDelegate.urlSession(:didReceiveChallenge:completionHandler:)`.
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/// Please refer to the document of it in `URLSessionDelegate`.
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func downloader(
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_ downloader: ImageDownloader,
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didReceive challenge: URLAuthenticationChallenge,
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completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
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/// Called when a task level authentication challenge is received.
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/// This method provide a chance to handle and response to the authentication
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/// challenge before downloading could start.
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///
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/// - Parameters:
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/// - downloader: The downloader which receives this challenge.
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/// - task: The task whose request requires authentication.
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/// - challenge: An object that contains the request for authentication.
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/// - completionHandler: A handler that your delegate method must call.
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func downloader(
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_ downloader: ImageDownloader,
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task: URLSessionTask,
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didReceive challenge: URLAuthenticationChallenge,
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completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
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}
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extension AuthenticationChallengeResponsable {
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public func downloader(
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_ downloader: ImageDownloader,
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didReceive challenge: URLAuthenticationChallenge,
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completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
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{
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if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
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if let trustedHosts = downloader.trustedHosts, trustedHosts.contains(challenge.protectionSpace.host) {
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let credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
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completionHandler(.useCredential, credential)
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return
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}
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}
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completionHandler(.performDefaultHandling, nil)
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}
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public func downloader(
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_ downloader: ImageDownloader,
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task: URLSessionTask,
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didReceive challenge: URLAuthenticationChallenge,
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completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void)
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{
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completionHandler(.performDefaultHandling, nil)
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}
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}
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