# digest認証用のモジュールをロード
LoadModule auth_digest_module modules/mod_auth_digest.so

# 認証をかけたい場所（例として/digestとしている）に以下を設定
# さらに例としてhttpd.confに記載しているが、もちろん.htaccessでも良い
<Location /digest>
    AuthType Digest
    AuthName "private Web"
    AuthUserFile "/usr/local/apache2/conf/.htdigest"
    Require valid-user
</Location>

LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Authorization}i\"" combined

version: "2"
services:
  digest:
    image: "httpd:2.4"
    environment:
      - HTTPD_DIGEST_PASS=pass
      - HTTPD_DIGEST_USER=admin
      - HTTPD_DIGEST_NAME=private Web
    volumes:
      - conf:/usr/local/apache2/conf
      - web:/usr/local/apache2/htdocs
    command: >
      bash -c 'echo -n $$HTTPD_DIGEST_USER:$$HTTPD_DIGEST_NAME:>conf/.htdigest &&
               echo -n $$HTTPD_DIGEST_USER:$$HTTPD_DIGEST_NAME:$$HTTPD_DIGEST_PASS|md5sum -|cut -f 1 -d " ">>conf/.htdigest
              '
  apache:
    image: "httpd:2.4"
    hostname: mobilework.kddilabs.jp
    ports:
      - 8888:8888
    volumes:
      - conf:/usr/local/apache2/conf
      - web:/usr/local/apache2/htdocs
    depends_on:
      - digest

volumes:
  conf:
    driver_opts:
      type: none
      device: $PWD/auth
      o: bind
  web:
    driver_opts:
      type: none
      device: $PWD/webroot
      o: bind

    func urlSession(_ session: URLSession, task: URLSessionTask, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        print(#file, #function, #line, separator:":")
        print("authentication method: ", challenge.protectionSpace.authenticationMethod)
        print("protection space , host: ", challenge.protectionSpace.host)
        let cnt = challenge.previousFailureCount
        print("previous failure count: ", cnt)
        guard cnt == 0 else {
            completionHandler(.cancelAuthenticationChallenge, nil)
            return
        }
        let cred = URLCredential(user: "admin", password: "pass", persistence: .forSession)
        completionHandler(.useCredential, cred)
    }