[jboss-jira] [JBoss JIRA] (WFCORE-1909) Tab completion causes NUL characters ('\0') to be injected...sometimes

[Jean-Francois Denise (JIRA)]

    [ https://issues.jboss.org/browse/WFCORE-1909?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13314015#comment-13314015 ] 

Jean-Francois Denise commented on WFCORE-1909:
----------------------------------------------

Hi David,
thank-you for the additional information. I ran your branch, the value-type is a simple String, nothing special there. I checked CLI code, no way to internally inject this character,

I found an explanation to what you are experiencing. It could be that, as our IDE are offering completion with the combination of "Ctrl- space" (at least NetBeans and Eclipse), you typed at some point this combination to complete the CLI as you are used to do in your IDE. In the terminal Ctrl-space means '\0' character...

I was able to reproduce the problem. Type 'Ctrl space', nothing is displayed in the CLI console although '\0' has been stored.

I am going to see if we can filter out (or make them visible) these characters at the Aesh level. Aesh sees all characters and has the choice to keep them or not.

> Tab completion causes NUL characters ('\0') to be injected...sometimes
> ----------------------------------------------------------------------
>
>                 Key: WFCORE-1909
>                 URL: https://issues.jboss.org/browse/WFCORE-1909
>             Project: WildFly Core
>          Issue Type: Bug
>          Components: CLI
>            Reporter: David Lloyd
>            Assignee: Jean-Francois Denise
>            Priority: Critical
>
> I noticed while testing my subsystem that sometimes using tab-complete on an attribute causes NUL ('\0') characters to be injected into the input.  These characters are invisible on the screen but cause XML marshalling to fail as that character is forbidden.
> My "less" output of .jboss-cli-history looks something like this:
> {noformat}
> embed-server --std-out=echo
> cd subsystem=discovery
> ./static-provider=test:add(services=[{uri=^@^@"local", abstract-type="ejb", abstract-type-authority="jboss"}])
> ./static-provider=test4:add(services=[{uri="local", abstract-type="ejb", abstract-type-authority="jboss"}])
> {noformat}
> In the first "test:add" case I used tab-completion; in the second "test4:add" case I typed it out by hand.  The "^@" are in inverse video in less, indicating a NUL character.



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