Question

我在一遍又一遍地尝试使用它之后发布了这个问题，没有成功。我试图在Android中使用apache commons库实现FTP文件传输。通信必须通过显式TLS身份验证完成。我可以成功登录，连接到服务器和列表文件，但每当我尝试获取或存储文件时，我总是会得到超时异常，即使对于2Kb的txt文件，也会有非常大的超时值。这是我的代码：

 FTPSClient ftpClient = new FTPSClient("TLS", false);
    ftpClient.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));
KeyManagerFactory kmf = getInstance(KeyManagerFactory.getDefaultAlgorithm());
kmf.init(null, null);
KeyManager km = kmf.getKeyManagers()[0];
ftpClient.setKeyManager(km);
ftpClient.setBufferSize(1024 * 1024);
ftpClient.setConnectTimeout(900000);
ftpClient.connect(InetAddress.getByName("server ip address"), 990);
// Set protection buffer size
ftpClient.execPBSZ(0);
// // Set data channel protection to private
ftpClient.execPROT("P");
ftpClient.login("user", "password");
ftpClient.changeWorkingDirectory("/");
ftpClient.setSoTimeout(900000);
ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
ftpClient.enterLocalPassiveMode();
buffIn = new BufferedInputStream(new FileInputStream(file.getAbsolutePath()));

//this works
FTPFile[] files = ftpClient.listFiles();
final OutputStream os = new FileOutputStream(finalStoragePath + "/OK.txt");
//this returns immediatly with false result
boolean getResult=ftpClient.retrieveFile("OK.txt", os);
//this always fail for timeout
boolean result = ftpClient.storeFile( picture.getName(), buffIn );

我找不到这个具体情况的例子，那里的所有例子都是关于普通的FTP连接，我可以毫无问题地实现。你们中间有没有类似的问题？我真的需要一个解决方案，我必须尽快交付项目。

感谢。

Answer 1

我终于找到了解决方案，解决方案是将信任管理器设置为接受所有证书。这里是那些遇到类似问题的代码，maby可以改进和/或优化，但它可以工作：

FTPSClient ftpClient = new FTPSClient("TLS", false);
try {
    TrustManager[] trustManager = new TrustManager[] { new X509TrustManager() {
        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) {
        }
    } };

    ftpClient.setTrustManager(trustManager[0]);
    KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
    kmf.init(null, null);
    KeyManager km = kmf.getKeyManagers()[0];
    ftpClient.setKeyManager(km);
    ftpClient.setBufferSize(1024 * 1024);
    ftpClient.setConnectTimeout(100000);
    ftpClient.connect(InetAddress.getByName("ipaddress"), 990);
    ftpClient.setSoTimeout(100000);

    if (ftpClient.login("user", "password")) {
        ftpClient.execPBSZ(0);
        ftpClient.execPROT("P");
        ftpClient.changeWorkingDirectory("/");
        // 250 = directory succesfully changed
        if (ftpClient.getReplyString().contains("250")) {
            ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
            ftpClient.enterLocalPassiveMode();
            BufferedInputStream buffIn = null;

            for (File picture : pictures) {
                buffIn = new BufferedInputStream(new FileInputStream(picture.getAbsolutePath()));
                boolean result = ftpClient.storeFile(picture.getName(), buffIn);
                try {
                    buffIn.close();
                } catch (Exception e) {
                }
                if (result)
                    picture.delete();
            }
        }
    }

} catch (SocketException e) {
    Log.e("APPTAG", e.getStackTrace().toString());
} catch (UnknownHostException e) {
    Log.e("APPTAG", e.getStackTrace().toString());
} catch (IOException e) {
    Log.e("APPTAG", e.getStackTrace().toString());
} catch (Exception e) {
    Log.e("APPTAG", e.getStackTrace().toString());
} finally {
    try {
        ftpClient.logout();
    } catch (Exception e2) {
    }
    try {
        ftpClient.disconnect();
    } catch (Exception e2) {
    }
}

Answer 2

您可以添加接受所有证书的库信任管理器，而不是创建一个。

FTPSClient mFtps = new FTPSClient();
mFtps.setTrustManager(TrustManagerUtils.getAcceptAllTrustManager());

Answer 3

getAcceptAllTrustManager（）表示未对证书的有效性进行检查。如果您控制所涉及站点的端到端，则可能没问题。请参阅：Trusting all certificates using HttpClient over HTTPS

android ftp文件传输显式TLS

3 个答案: