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Added charset support, centralized UTF-8 usage #305

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merged 3 commits into from
Mar 9, 2017

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ISQ-GTT
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@ISQ-GTT ISQ-GTT commented Mar 8, 2017

Here's the fix as promised in Issue #277. Feel free to make changes.

* @return remote character set or {@code null} for default
*/
public Charset getRemoteCharset()
{
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Please use the same formatting as the rest of the code, ie. open-curly on end-of-line

@@ -93,7 +98,7 @@ public Command exec(String command)
throws ConnectionException, TransportException {
checkReuse();
log.debug("Will request to exec `{}`", command);
sendChannelRequest("exec", true, new Buffer.PlainBuffer().putString(command))
sendChannelRequest("exec", true, new Buffer.PlainBuffer().putString(command.getBytes(getRemoteCharset())))
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The main question I have when reading this, should every string be written using the remote charset? If so, it is nicer to make it a property of the Buffer, rather than converting it everywhere we call putString.

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Or make a putString(String s, Charset cs) method, which makes the rest of the code at least cleaner and more concise.

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The remote side seems to decode the command using its own charset instead of utf-8. Commands containing filenames with special characters won't work properly using utf-8 on non-utf-8 remote machines.
I'll add the putString(String s, Charset cs) method. There will still be a lot of getRemoteCharset() calls in SFTPEngine though which could also be replaced by a property.

@@ -128,6 +129,9 @@

private final List<LocalPortForwarder> forwarders = new ArrayList<LocalPortForwarder>();

/** character set of the remote machine */
protected Charset remoteCharset;
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Assign the default IOUtils.UTF_8 here.

* remote character set or {@code null} for default
*/
public void setRemoteCharset(Charset remoteCharset) {
this.remoteCharset = remoteCharset;
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Ensure that you cannot set null

@Override
public Session startSession()
throws ConnectionException, TransportException {
checkConnected();
checkAuthenticated();
final SessionChannel sess = new SessionChannel(conn);
final SessionChannel sess = (remoteCharset != null)? new SessionChannel(conn, remoteCharset) : new SessionChannel(conn);
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No need to do the if in the case that we default to UTF_8 here already.

@hierynomus hierynomus merged commit a03fa9a into hierynomus:master Mar 9, 2017
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THanks, merged :)

@hierynomus hierynomus mentioned this pull request Mar 9, 2017
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2 participants