}

    @Override public void connectEnd(
        Call call, InetSocketAddress inetSocketAddress, Proxy proxy, Protocol protocol) {
      printEvent("connectEnd");
    }

    @Override public void connectFailed(Call call, InetSocketAddress inetSocketAddress, Proxy proxy,
        Protocol protocol, IOException ioe) {
      printEvent("connectFailed");
    }

    }

    @Override public void connectEnd(
        Call call, InetSocketAddress inetSocketAddress, Proxy proxy, Protocol protocol) {
      printEvent("connectEnd");
    }

    @Override public void connectFailed(Call call, InetSocketAddress inetSocketAddress, Proxy proxy,
        Protocol protocol, IOException ioe) {
      printEvent("connectFailed");
    }

                boolean flag = false;
                for (final String protocol : protocols) {
                    if (path.trim().startsWith(protocol.trim())) {
                        flag = true;
                        break;
                    }
                }
                if (!flag) {
                    return false;
                }
            }
        }
        return true;
    }

        .url("https://google.com/robots.txt")
        .build();
    try (Response response = client.newCall(request).execute()) {
      assertEquals(200, response.code());
      assertEquals(Protocol.HTTP_2, response.protocol());
    }
  }

        String protocol = "perlookup";

        Wagon one = wagonManager.getWagon(protocol);
        Wagon two = wagonManager.getWagon(protocol);

        assertNotSame(one, two);
    }

    private void assertWagon(String protocol) throws Exception {
        Wagon wagon = wagonManager.getWagon(protocol);

        assertNotNull(wagon, "Check wagon, protocol=" + protocol);
    }

            .url(url)
            .build();
    try (Response response = client.newCall(request).execute()) {
      assertTrue(response.code() == 200 || response.code() == 404);
      assertEquals(Protocol.HTTP_2, response.protocol());
    }
  }

            throws TransferFailedException, ResourceDoesNotExistException {
        String protocol = repository.getProtocol();

        Wagon wagon;

        try {
            wagon = getWagon(protocol);
        } catch (UnsupportedProtocolException e) {
            throw new TransferFailedException("Unsupported Protocol: '" + protocol + "': " + e.getMessage(), e);
        }

        if (downloadMonitor != null) {

            }
        }

        // empty one to prevent NPE
        return new AuthenticationInfo();
    }

    public ProxyInfo getProxy(String protocol) {
        MavenSession session = legacySupport.getSession();

        if (session != null && protocol != null) {
            MavenExecutionRequest request = session.getRequest();

            if (request != null) {

    /**
     * プロトコルを正規化して返します。
     *
     * @param protocol
     *            プロトコル。{@literal null}や空文字列であってはいけません
     * @return 正規化されたプロトコル
     */
    public static String toCanonicalProtocol(final String protocol) {
        assertArgumentNotEmpty("protocol", protocol);

        final String canonicalProtocol = CANONICAL_PROTOCOLS.get(protocol);
        if (canonicalProtocol != null) {

            .url(url)
            .build();
    try (Response response = client.newCall(request).execute()) {
      assertTrue(response.code() == 200 || response.code() == 404);
      assertEquals(Protocol.HTTP_2, response.protocol());

      for (Certificate c: response.handshake().peerCertificates()) {
        X509Certificate x = (X509Certificate) c;
        System.out.println(x.getSubjectDN());
      }
    }
  }