[jira] [Commented] (HBASE-8811) REST service ignores misspelled "check=" parameter, causing unexpected mutations

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-8811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13694471#comment-13694471 ] 

Andrew Purtell commented on HBASE-8811:
---------------------------------------

Agreed, let me commit this after testing the change. Thanks for reporting this [~chipdude]. 
                
> REST service ignores misspelled "check=" parameter, causing unexpected mutations
> --------------------------------------------------------------------------------
>
>                 Key: HBASE-8811
>                 URL: https://issues.apache.org/jira/browse/HBASE-8811
>             Project: HBase
>          Issue Type: Bug
>          Components: REST
>    Affects Versions: 0.95.1
>            Reporter: Chip Salzenberg
>            Priority: Critical
>
> In rest.RowResource.update(), this code keeps executing a request if a misspelled check= parameter is provided.
> {noformat}
>     if (CHECK_PUT.equalsIgnoreCase(check)) {
>       return checkAndPut(model);
>     } else if (CHECK_DELETE.equalsIgnoreCase(check)) {
>       return checkAndDelete(model);
>     } else if (check != null && check.length() > 0) {
>       LOG.warn("Unknown check value: " + check + ", ignored");
>     }
> {noformat}
> By my reading of the code, this results in the provided cell value that was intended as a check instead being treated as a mutation, which is sure to destroy user data.  Thus the priority of this bug, as it can cause corruption.
> I suggest that a better reaction than a warning would be, approximately:
> {noformat}
> return Response.status(Response.Status.BAD_REQUEST)
>         .type(MIMETYPE_TEXT).entity("Invalid check value '" + check + "'")
>         .build();
> {noformat}

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