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https://issues.apache.org/jira/browse/SOLR-14189?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Webb updated SOLR-14189:
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Summary: Some whitespace characters bypass zero-length test in query
parsers leading to 400 Bad Request (was: Some whitespace characters bypass
zero-length test in query parsers)
> Some whitespace characters bypass zero-length test in query parsers leading
> to 400 Bad Request
> ----------------------------------------------------------------------------------------------
>
> Key: SOLR-14189
> URL: https://issues.apache.org/jira/browse/SOLR-14189
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: query parsers
> Reporter: Andy Webb
> Priority: Major
>
> The edismax and some other query parsers treat pure whitespace queries as
> empty queries, but they use Java's {{String.trim()}} method to normalise
> queries. That method only treats characters 0-32 as whitespace. Other
> whitespace characters exist - such as {{U+3000 IDEOGRAPHIC SPACE}} - which
> bypass the test and lead to {{400 Bad Request}} responses - see for example
> {{/solr/mycollection/select?q=%E3%80%80&defType=edismax}} vs
> {{/solr/mycollection/select?q=%20&defType=edismax}}. The first fails with the
> exception:
> {noformat}
> org.apache.solr.search.SyntaxError: Cannot parse '': Encountered "<EOF>" at
> line 1, column 0. Was expecting one of: <NOT> ... "+" ... "-" ... <BAREOPER>
> ... "(" ... "*" ... <QUOTED> ... <TERM> ... <PREFIXTERM> ... <WILDTERM> ...
> <REGEXPTERM> ... "[" ... "{" ... <LPARAMS> ... "filter(" ... <NUMBER> ...
> <TERM> ...
> {noformat}
> (PR incoming!)
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