reggert opened a new pull request #1409: Corrected servlet parameter handling so that it does not break things URL: https://github.com/apache/accumulo/pull/1409 This resolves #1401. I removed the previous implementation of string sanitization, replacing it with more specific checks at the places where the parameters are used. As it turns out, the broken method was only used in two places, `ListType` and `ShowTrace`. In the former case, sanitization was only needed when including in the HTML output, so I used `StringEscapeUtils.escapeHtml` for that. In the latter case, sanitization was needed prior to passing the string in an Accumulo range, so I used a regular expression in `getTraceID` to validate that the string contains exactly 16 hexadecimal digits, which is how trace IDs are represented in the trace table. `BasicTest` was deleted because it was exclusively testing the broken sanitization mechanism. No other tests exist for the servlets, which is a problem but out of scope for what this patch is fixing. As a more long term solution, the servlets really ought to be replaced by JSP or another templating mechanism that can automatically handle escaping HTML content, rather that building HTML by concatenating Java strings.
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