FTPSClient 仅在上传 diminute 文件时成功

Question

我在将文件上传到 FTPS 服务器时遇到了一个严重（而且很奇怪）的问题。

我必须上传 JSON 个文件，其中一些文件非常小（不到 5kB）。这些文件没有问题，我可以上传成功

但是在上传 "larger" 个文件（不是很大，超过 30kb）时显示此错误：

java.net.SocketException: Connection reset by peer: socket write error
    at java.net.SocketOutputStream.socketWrite0(Native Method)
    at java.net.SocketOutputStream.socketWrite(Unknown Source)
    at java.net.SocketOutputStream.write(Unknown Source)
    at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
    at java.io.BufferedOutputStream.flush(Unknown Source)
    at java.io.FilterOutputStream.flush(Unknown Source)
    at java.io.FilterOutputStream.close(Unknown Source)
    at org.apache.commons.net.ftp.FTPClient._storeFile(FTPClient.java:688)
    at org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:639)
    at org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:2030)
    at com.spsa.integracion.gastosingresos.business.impl.GastosIngresosIFImpl.envioArchivoAFTPS(GastosIngresosIFImpl.java:206)
    at com.spsa.integracion.gastosingresos.business.impl.GastosIngresosIFImpl.ejecutar(GastosIngresosIFImpl.java:90)
    at com.spsa.integracion.gastosingresos.GastosIngresosApplication.run(GastosIngresosApplication.java:27)
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:800)
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:784)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:338)
    at com.spsa.integracion.gastosingresos.GastosIngresosApplication.main(GastosIngresosApplication.java:20)
    Suppressed: java.net.SocketException: Software caused connection abort: socket write error
        at java.net.SocketOutputStream.socketWrite0(Native Method)
        at java.net.SocketOutputStream.socketWrite(Unknown Source)
        at java.net.SocketOutputStream.write(Unknown Source)
        at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
        at java.io.BufferedOutputStream.flush(Unknown Source)
        at java.io.FilterOutputStream.close(Unknown Source)
        ... 11 more

这是我的上传代码

boolean binaryTransfer = false, success = false;

        FTPSClient ftps;

        fileName = "A134_GASTOS_M_20181024_184808.JSON";

        int port = Integer.parseInt(applicationProperties.getFtpsPort());
        String server = applicationProperties.getFtpsHost();
        String username = applicationProperties.getFtpsUsername();
        String password = applicationProperties.getFtpsPassword();
        String remote = "\" + applicationProperties.getFolder() + "\" + fileName;
        String local = "\" + fileName;
        String errorMessage = "";

        ftps = new FTPSClient(true);

        ftps.addProtocolCommandListener(new PrintCommandListener(new PrintWriter(System.out)));

        try {
            int reply;

            ftps.connect(server, port);
            System.out.println("Conectado a " + server + ".");


            reply = ftps.getReplyCode();

            if (!FTPReply.isPositiveCompletion(reply)) {
                ftps.disconnect();
                System.err.println("El servidor FTP rechazo la conexion");
                System.exit(1);
            }
        } catch (IOException e) {
            if (ftps.isConnected()) {
                try {
                    ftps.disconnect();
                } catch (IOException f) {

                }
            }
            System.err.println("No se pudo conectar al servidor");
            e.printStackTrace();
            errorMessage = "No se pudo conectar al servidor";
            System.exit(1);
        }

        try {
            ftps.setBufferSize(1000);

            if (!ftps.login(username, password)) {
                ftps.logout();
            }

            System.out.println("Remote system is " + ftps.getSystemName());

            if (binaryTransfer)
                ftps.setFileType(FTP.BINARY_FILE_TYPE);

            // Use passive mode as default because most of us are
            // behind firewalls these days.
            ftps.enterLocalPassiveMode();

            InputStream input;
            input = new FileInputStream(local);

            ftps.storeFile(remote, input);
            input.close();
            ftps.logout();
            success = true;

        } catch (FTPConnectionClosedException e) {
            System.err.println("Conexion FTP cerrada");         
            errorMessage = "Conexion FTP cerrada";
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
            errorMessage = "Conexion FTP cerrada";
        } finally {
            if (ftps.isConnected()) {
                try {
                    ftps.disconnect();
                } catch (IOException f) {
                    // do nothing
                }
            }
        }

我已经尝试过使用 outpustream，但我遇到了同样的错误。也尝试过使用 WinSCP 手动上传并且成功了，所以这不是权限问题。

Answer 1

我设法解决了这个问题。发生的事情是 FTPS 服务器使用 SSL v3 协议进行连接，由于存在一些安全漏洞，该协议已被 java 弃用。

最佳解决方案是更改 t.he FTP 服务器

的协议

FTPSClient 仅在上传 diminute 文件时成功

FTPSClient only succeeds when uploading diminute files

java

file-upload

ftps

ftp-server