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Code Issues Wiki Activity

[380023] [dstore] remote file permissions lost after upload

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This commit is contained in:
David McKnight 2012-05-18 21:50:10 +00:00
parent a6ed55871a
commit 840bbe1553
1 changed files with 58 additions and 12 deletions
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70
rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/ByteStreamHandler.java
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@ -15,16 +15,17 @@
* David McKnight (IBM) [224906] [dstore] changes for getting properties and doing exit due to single-process capability
* David McKnight (IBM) [281712] [dstore] Warning message is needed when disk is full
* David McKnight (IBM) [367424] [dstore] upload mechanism should provide backups of files
* David McKnight (IBM) [380023] [dstore] remote file permissions lost after upload
*******************************************************************************/
package org.eclipse.dstore.core.model;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.eclipse.dstore.internal.core.model.IDataStoreSystemProperties;
/**
* <p>
* The ByteStreamHandler class is used to abstract file read and write operations
@ -60,6 +61,52 @@ public class ByteStreamHandler implements IByteStreamHandler
return getClass().getName();
}
private void backupFile(File file, File backupFile){
/* this is nice but orginal file permissions not perserved
if(!file.renameTo(backupFile) && backupFile.exists()) {
backupFile.delete();
file.renameTo(backupFile);
}
*/
/* in order to preserve original permissions for orignal file we can't rename
* instead we need to copy the file over
*/
FileInputStream inputStream = null;
FileOutputStream backupFileStream = null;
try {
inputStream = new FileInputStream(file);
backupFileStream = new FileOutputStream(backupFile);
byte[] buffer = new byte[512000];
long totalSize = file.length();
int totalRead = 0;
while (totalRead < totalSize){
int available = inputStream.available();
available = (available < 512000) ? available : 512000;
int bytesRead = inputStream.read(buffer, 0, available);
if (bytesRead == -1) {
break;
}
backupFileStream.write(buffer, 0, bytesRead);
totalRead += bytesRead;
}
} catch (FileNotFoundException e) {
} catch (IOException e){
} finally {
try {
inputStream.close();
backupFileStream.close();
}
catch (IOException e){
}
}
}
/**
* Save a file in the specified location. This method is called by the
* DataStore when the communication layer receives a file transfer
@ -89,16 +136,15 @@ public class ByteStreamHandler implements IByteStreamHandler
}
else
{
// backup file on upload by default
String doBackups = System.getProperty("backupfiles"); //$NON-NLS-1$
if (doBackups == null || doBackups.equals("true")){ //$NON-NLS-1$
// backup the file first
String n = file.getName();
File backupFile = new File(parent, '.' + n + '~');
_dataStore.trace("Backing up as "+backupFile.getAbsolutePath()); //$NON-NLS-1$
if(!file.renameTo(backupFile) && backupFile.exists()) {
backupFile.delete();
file.renameTo(backupFile);
if (!_dataStore.isVirtual()){ // only applies to server
// backup file on upload by default
String doBackups = System.getProperty("backupfiles"); //$NON-NLS-1$
if (doBackups == null || doBackups.equals("true")){ //$NON-NLS-1$
// backup the file first
String n = file.getName();
File backupFile = new File(parent, '.' + n + '~');
_dataStore.trace("Backing up as "+backupFile.getAbsolutePath()); //$NON-NLS-1$
backupFile(file, backupFile);
}
}
}