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Posted to dev@mina.apache.org by "Lyor Goldstein (Jira)" <ji...@apache.org> on 2021/08/20 03:16:00 UTC

[jira] [Comment Edited] (SSHD-1209) Write to error stream for custom exception is appending a extra word at the beginning

    [ https://issues.apache.org/jira/browse/SSHD-1209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17401788#comment-17401788 ] 

Lyor Goldstein edited comment on SSHD-1209 at 8/20/21, 3:15 AM:
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You are writing the string to a {{ByteBufferArray}} and that means that it is UTF-8 encoded - perhaps you are writing some UNICODE data but reading it as ASCII instead of UTF-8 on the peer side. Another possibility is that you are not reading the data as a {{ByteBufferArray}} - reminder: when writing a string, its length is written as a 32-bit value before the (UTF-8) characters


was (Author: lgoldstein):
You are writing the string to a {{ByteBufferArray}} and that means that it is UTF-8 encoded - perhaps you are writing some UNICODE data but reading it as ASCII instead of UTF-8 on the peer side

> Write to error stream for custom exception is appending a extra word at the beginning
> -------------------------------------------------------------------------------------
>
>                 Key: SSHD-1209
>                 URL: https://issues.apache.org/jira/browse/SSHD-1209
>             Project: MINA SSHD
>          Issue Type: Bug
>    Affects Versions: 2.7.0
>            Reporter: Susmit Sarkar
>            Priority: Major
>         Attachments: image-2021-08-19-12-50-01-922.png
>
>
> Hello Team,
>  
> We have a class as below
>  
> {code:java}
> DetailedSftpErrorStatusDataHandler implements SftpErrorStatusDataHandler, ChannelSessionAware, DetailedSftpErrorStatusDataHandler implements SftpErrorStatusDataHandler, ChannelSessionAware, AsyncCommandErrorStreamAware, CommandDirectErrorStreamAware {
> {code}
> and we have overridden the :
>  
> resolveErrorMessage and setIoErrorStream(IoOutputStream errStream) 
> {code:java}
>  @Override
>  public void setIoErrorStream(IoOutputStream errStream) { 
>      this.errStream = errStream;
>  }
> {code}
> finally we are writing to the error stream:
> {code:java}
> private void writeMsgToErrorStream(String refinedUserExitMessage) {
>     ByteArrayBuffer buf = new ByteArrayBuffer();
>     buf.putString(refinedUserExitMessage + System.getProperty("line.separator")); 
>     try { if (errStream != null) { 
>         errStream.writeBuffer(buf); 
>           }
>     } catch (Exception e) { 
>     }
>  }
> {code}
> Once the data is written to error stream we are gettig proper message to the console:
> !image-2021-08-19-12-50-01-922.png!
> But there is an extra charater getting appended at the first character *<* Utils.java ....
> I have no idea from where this *<* is coming from, and that changes with the first character like if it is P it would be *>, when starting with S it gets appended with Z*
> Any help will be appreciated.
> Thanks,
> Susmit
>  



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