commons-net ftp正在上传损坏的文件

Question

我正在尝试使用apache commons-net进行ftp文件传输.

问题是文件间歇性地到达服务器损坏.'腐败'我的意思是winrar告诉我一个zip文件有一个'意外的归档结束'.有时文件是完全空的.我注意到,对于较大的文件(100kb +),这种情况更多,但对于小文件也会发生(20kb).

我知道上传的源zip文件是有效的,只有243kb.

我没有从代码中得到任何错误/异常.

这是正在执行的代码:

    try
    {
        int CON_TIMEOUT = (int) TimeUnit.SECONDS.toMillis(20); // fail if can't connect within 20 seconds
        int LIVE_TIMEOUT = (int) TimeUnit.MINUTES.toMillis(5); // allow up to 5 minutes for data transfers

        FTPClient client = new FTPClient();
        client.setConnectTimeout(CON_TIMEOUT);
        client.setDataTimeout(LIVE_TIMEOUT);
        client.connect(host);
        client.setSoTimeout(LIVE_TIMEOUT);
        client.login(user, pass);
        client.changeWorkingDirectory(dir);
        log("client ready");

        File file = new File(filePath);
        String name = new Date().getTime() + "-" + file.getName();

        InputStream fis = null;
        try
        {
            fis = new FileInputStream(file);
            if (!client.storeFile(name, fis))
                throw new RuntimeException("store failed");
            log("store " + name + " complete");
        }
        finally
        {
            IOUtils.closeQuietly(fis);
            try
            {
                client.logout();
                log("logout");
            }
            catch (Throwable e)
            {
                log("logout failed", e);
            }
            try
            {
                client.disconnect();
                log("disconnect");
            }
            catch (Throwable e)
            {
                log("disconnect failed", e);
            }
        }
    }
    catch (Throwable e)
    {
        log("transfer failed", e);
    }

和一些日志:

2010-08-10 21:32:38 client ready
2010-08-10 21:32:49 store 1281439958234-file.zip complete
2010-08-10 21:32:49 logout
2010-08-10 21:32:49 disconnect
2010-08-10 21:32:50 client ready
2010-08-10 21:33:00 store 1281439970968-file.zip complete
2010-08-10 21:33:00 logout
2010-08-10 21:33:00 disconnect
2010-08-10 21:33:02 client ready
2010-08-10 21:33:11 store 1281439982234-file.zip complete
2010-08-10 21:33:11 logout
2010-08-10 21:33:11 disconnect
2010-08-10 21:33:15 client ready
2010-08-10 21:33:25 store 1281439995890-file.zip complete
2010-08-10 21:33:26 logout
2010-08-10 21:33:26 disconnect
2010-08-10 21:33:27 client ready
2010-08-10 21:33:36 store 1281440007531-file.zip complete
2010-08-10 21:33:36 logout
2010-08-10 21:33:36 disconnect
2010-08-10 21:33:37 client ready
2010-08-10 21:33:48 store 1281440017843-file.zip complete
2010-08-10 21:33:48 logout
2010-08-10 21:33:48 disconnect
2010-08-10 21:33:49 client ready
2010-08-10 21:33:59 store 1281440029781-file.zip complete
2010-08-10 21:33:59 logout
2010-08-10 21:33:59 disconnect
2010-08-10 21:34:00 client ready
2010-08-10 21:34:09 store 1281440040812-file.zip complete
2010-08-10 21:34:09 logout
2010-08-10 21:34:09 disconnect
2010-08-10 21:34:10 client ready
2010-08-10 21:34:23 store 1281440050859-file.zip complete
2010-08-10 21:34:24 logout
2010-08-10 21:34:24 disconnect
2010-08-10 21:34:25 client ready
2010-08-10 21:34:35 store 1281440065421-file.zip complete
2010-08-10 21:34:35 logout
2010-08-10 21:34:35 disconnect

请注意,所有这些都在15秒内完成,并且服务器上的所有结果文件都已损坏.

我也测试了没有设置任何超时,问题仍然存在.

Answer 1

Commons FTP默认为ascii文件类型.在处理像zip文件这样的二进制数据时,您希望将其设置为Binary.

来自http://commons.apache.org/net/api/org/apache/commons/net/ftp/FTPClient.html

FTPClient的默认设置是使用FTP.ASCII_FILE_TYPE,FTP.NON_PRINT_TEXT_FORMAT,FTP.STREAM_TRANSFER_MODE和FTP.FILE_STRUCTURE.直接支持的唯一文件类型是FTP.ASCII_FILE_TYPE和FTP.BINARY_FILE_TYPE.

你想在发送文件之前做setFileType(FTP.BINARY_FILE_TYPE).