[jira] [Comment Edited] (GUACAMOLE-2268) VNC: add UTF-8 (Unicode) support.

["Nick Couchman (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GUACAMOLE-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18079031#comment-18079031 ] 

Nick Couchman edited comment on GUACAMOLE-2268 at 5/7/26 12:01 PM:
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As [reported on the mailing list|https://lists.apache.org/thread/w4n8r03qk29x7f21cfo4kos1yb1mx770], the build is broken on libvncclient versions prior to 0.9.15, which do not contain the UTF8 functions.


was (Author: nick.couchman@yahoo.com):
As reported on the mailing list, the build is broken on libvncclient versions prior to 0.9.15, which do not contain the UTF8 functions.

> VNC: add UTF-8 (Unicode) support.
> ---------------------------------
>
>                 Key: GUACAMOLE-2268
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-2268
>             Project: Guacamole
>          Issue Type: Improvement
>          Components: VNC
>            Reporter: Bradley Bennett
>            Priority: Minor
>             Fix For: 1.6.1 [staging]
>
>
> The {*}libvncserver *client library supports UTF-8 clipboard text through *SendClientCutTextUTF8(){*}, but Guacamole does not currently use it. This supplements {*}SendClientCutText(){*}, which only supports ISO-8859-1 text.
> UTF-8 supports multibyte sequences. For example, Japanese characters commonly use 3 bytes each. Without Guacamole support for SendClientCutTextUTF8(), sending the 5-character Japanese word for “hello”:
> {code:java}
> こんにちは
> {code}
> with UTF-8 clipboard encoding selected, this yields:
> {code:java}
> ã) ã( ã)«ã)¡ã)-{code}
> Each byte of the multibyte UTF-8 sequence is interpreted as a separate ISO-8859-1 character.
> With the default ISO-8859-1 clipboard encoding selected, pasting yields:
> {code:java}
> ?????{code}
> Each Japanese character is replaced with the unknown/replacement character because ISO-8859-1 cannot represent Japanese text.
> With SendClientCutTextUTF8() support implemented, and UTF-8 encoding selected, pasting will yield the actual Japanese characters.
> Support will also be added for logging the VNC protocol version of security type when a connection is established.
> {code:java}
> Connected using RFB 3.8, security: VeNCrypt (19), sub-security: VeNCrypt/TLSVNC (258). {code}



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