本文介紹了FTP zip 上傳有時會損壞的處理方法，對大家解決問題具有一定的參考價值，需要的朋友們下面隨著小編來一起學習吧！
問題描述
我編寫了一個代碼，用于將少量圖像保存在一個文件中，然后壓縮該文件并上傳到 ftp 服務器.當我從服務器下載它時，很少有文件很好，也很少有文件損壞.這可能是什么原因?壓縮代碼或上傳代碼是否有問題.
I wrote a code for saving few images in a file and later compressing that file and uploading to an ftp server. When I download that from server, few files are fine and few files got corrupted. What can be the reason for that? Whether there may be a fault with Compress code or uploader code.
壓縮代碼:
public class Compress {
private static final int BUFFER = 2048;
private ArrayList<String> _files;
private String _zipFile;
public Compress(ArrayList<String> files, String zipFile) {
Log.d("Compress", "Compressing started");
_files = files;
_zipFile = zipFile;
}
public void zip() {
try {
BufferedInputStream origin = null;
File f = new File(_zipFile);
if (f.exists())
f.delete();
FileOutputStream dest = new FileOutputStream(_zipFile);
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
dest));
byte data[] = new byte[BUFFER];
for (int i = 0; i < _files.size(); i++) {
Log.v("Compress", "Adding: " + _files.get(i));
FileInputStream fi = new FileInputStream(_files.get(i));
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(_files.get(i).substring(
_files.get(i).lastIndexOf("/") + 1));
out.putNextEntry(entry);
int count;
while ((count = origin.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
origin.close();
}
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
FTP上傳代碼:
public class UploadZipFiles extends AsyncTask<Object, Integer, Object> {
ArrayList<String> zipFiles;
String userName, password;
WeakReference<ServiceStatusListener> listenerReference;
private long totalFileSize = 0;
protected long totalTransferedBytes = 0;
final NumberFormat nf = NumberFormat.getInstance();
public UploadZipFiles(ServiceStatusListener listener,
ArrayList<String> zipFiles, String userName, String password) {
Log.d("u and p", "" + userName + "=" + password);
this.zipFiles = zipFiles;
this.userName = userName;
this.password = password;
this.listenerReference = new WeakReference<ServiceStatusListener>(
listener);
nf.setMinimumFractionDigits(2);
nf.setMaximumFractionDigits(2);
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
super.onPreExecute();
for (String file : zipFiles) {
totalFileSize = totalFileSize + new File(file).length();
}
}
@Override
protected Object doInBackground(Object... arg0) {
CustomFtpClient ftpClient = new CustomFtpClient();
try {
ftpClient.connect(ftpUrl);
// change here
ftpClient.login(userName, password);
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
for (String file : zipFiles) {
InputStream in;
in = new FileInputStream(new File(file));
ftpClient.storeFile(new File(file).getName(), in);
in.close();
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// TODO add files to ftp
return "Success";
}
@Override
protected void onPostExecute(Object result) {
if (result instanceof Exception) {
listenerReference.get().onFailure(
new Exception(result.toString()));
} else {
listenerReference.get().onSuccess("Success");
}
}
@Override
protected void onProgressUpdate(Integer... values) {
UploadActivity.progressBar
.setProgress((int) (((float) values[0] / totalFileSize) * 100));
UploadActivity.uploadingSizeTextView.setText(nf
.format(((float) values[0] / (1024 * 1024)))
+ " mb of "
+ nf.format(((float) totalFileSize / (1024 * 1024)))
+ " mb uploaded");
}
public class CustomFtpClient extends FTPClient {
public boolean storeFile(String remote, InputStream local)
throws IOException {
OutputStream output;
Socket socket;
if ((socket = _openDataConnection_(FTPCommand.STOR, remote)) == null)
return false;
output = new BufferedOutputStream(socket.getOutputStream(),
getBufferSize());
// if (__fileType == ASCII_FILE_TYPE)
// output = new ToNetASCIIOutputStream(output);
// Treat everything else as binary for now
try {
Util.copyStream(local, output, getBufferSize(),
CopyStreamEvent.UNKNOWN_STREAM_SIZE,
new CopyStreamListener() {
@Override
public void bytesTransferred(
long totalBytesTransferred,
int bytesTransferred, long streamSize) {
totalTransferedBytes = totalTransferedBytes
+ bytesTransferred;
publishProgress((int) totalTransferedBytes);
// UploadActivity.uploadingSizeTextView.setText(nf
// .format((totalBytesTransferred / (1024 *
// 1024)))
// + " mb of "
// + nf.format((totalFileSize / (1024 *
// 1024)))
// + " mb uploaded");
}
@Override
public void bytesTransferred(
CopyStreamEvent arg0) {
// TODO Auto-generated method stub
}
});
// Util.copyStream(local, output, getBufferSize(),
// CopyStreamEvent.UNKNOWN_STREAM_SIZE, null, false);
} catch (IOException e) {
try {
socket.close();
} catch (IOException f) {
}
throw e;
}
output.close();
socket.close();
return completePendingCommand();
}
}
}
推薦答案
一定要傳輸BINARY_FILE_TYPE中的文件.也許 ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); 返回 false?
Be sure to transfer files in BINARY_FILE_TYPE. Maybe ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE); returns false?
順便說一句，如果您以 ASCII 模式傳輸 zip，這幾乎肯定會導致損壞.
By the way, if you transfer a zip in ASCII-mode, this will almost surely result corrupted.
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