我正在尝试使用Apache Commons Net进行FTP文件传输。
问题是文件有时会损坏地到达服务器。所谓“损坏”,是指WinRAR告诉我一个ZIP文件有一个“意外的归档结尾”。有时文件完全为空。我注意到这种情况更多地发生在较大的文件(100kb +)上,但对于小文件(20kb)也会发生。
我确信被上传的源zip文件是有效的,而且只有243kb。
代码没有产生任何错误/异常。
以下是执行的代码:
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);
}
}
还有一些日志:
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,所有这些操作都在15秒内完成,但服务器上的所有结果文件都已损坏。
我还进行了没有设置任何超时的测试,问题仍然存在。
ftpClient.setFileType(FTP.BINARY_FILE_TYPE)
,因为connect()将重置类型为FTP.ASCII_FILE_TYPE
。 - Mohsen