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https://issues.apache.org/jira/browse/HDFS-17966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zita Dombi updated HDFS-17966:
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Summary: HttpFS: Path parameters with special characters are HTML-encoded
by QuotingInputFilter, corrupting HDFS names (was: HttpFS: Path parameters
with special characters are HTML-encoded by QuotingInputFilter, corrupting HDFS
filenames)
> HttpFS: Path parameters with special characters are HTML-encoded by
> QuotingInputFilter, corrupting HDFS names
> -------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-17966
> URL: https://issues.apache.org/jira/browse/HDFS-17966
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Zita Dombi
> Priority: Major
>
> WebHDFS operations that accepts a path, entity name, or metadata string as an
> HTTP query parameter (e.g. RENAME) via HttpFS and has special characters in
> the target path parameters (such as &, <, >, ", ') are automatically
> HTML-encoded. E.g. renaming a file to a path containing "&" results in
> "&" written literally to HDFS. Native WebHDFS on the NameNode handles
> these operations correctly without corrupting the path.
> 1. HttpFS
> {code:java}
> curl -X PUT
> "https://<host>:14000/webhdfs/v1/user/admin/httpfstest1?op=RENAME&destination=%2Fuser%2Fadmin%2Fhttpfstest1%26"
> hdfs dfs -ls /user/admin/ | grep httpfstest
> # Result: /user/admin/httpfstest1&
> {code}
> 2. Native WebHDFS
> {code:java}
> curl -X PUT
> "https://<active-namenode>:20102/webhdfs/v1/user/admin/nativetest1?op=RENAME&destination=%2Fuser%2Fadmin%2Fnativetest1%26"
> hdfs dfs -ls /user/admin/ | grep nativetest
> # Result: /user/admin/nativetest1&
> {code}
> HttpServer2 registers a global XSS protection filter, QuotingInputFilter,
> `quoteHtmlChars()` explicitly converts reserved characters (e.g., & to
> &). Native WebHDFS does not apply this filter and parses parameters
> directly via JAX-RS, keeping the original path intact.
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