[type: bug] Fix RewritePlugin placeholder drops first character and StringIndexOutOfBounds (#6883) - #7013
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…tringIndexOutOfBounds (apache#6883) Signed-off-by: zhang-arvin <arvin.zhang@htx-inc.com>
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Fixes #6883.
Bug Description
The RewritePlugin has two bugs in its placeholder branch:
First character of path-variable value is dropped:
rewriteUri.substring(rewriteHandle.getRegex().indexOf("{") + 1)skips the first character of the actual path-variable value because the+1is meant to skip the{character in the regex pattern, but it's applied to the rewriteUri which has the actual value at that position.StringIndexOutOfBoundsException when regex lacks
{: The condition only checksrewriteHandle.getReplace().contains("{")but notrewriteHandle.getRegex().contains("{"). When the replace pattern contains{but the regex doesn't,indexOf("{")returns -1, causingsubstring(-1)to throw.Fix
rewriteHandle.getRegex().contains("{")to the guard condition+1offset fromrewriteUri.substring()to preserve the first character