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https://issues.apache.org/jira/browse/KNOX-767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15684147#comment-15684147
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Sumit Gupta commented on KNOX-767:
----------------------------------
Committed [~jeffreyr97]'s patch as it solves the issue of how CDATA is handled.
I'm keeping the JIRA open as we still need to figure out how to not parse the
body if no filters are applicable.
> Knox transforms XML files written to WebHDFS
> --------------------------------------------
>
> Key: KNOX-767
> URL: https://issues.apache.org/jira/browse/KNOX-767
> Project: Apache Knox
> Issue Type: Bug
> Reporter: Sumit Gupta
> Assignee: Jeffrey E Rodriguez
> Fix For: 0.11.0
>
> Attachments: KNOX-767.patch
>
>
> When you write an XML file to WebHDFS through Knox with the Content-Type
> header set to text/xml or application/xml it is transformed by Knox so that
> empty tags like <xyz/> are written as <xyz></xyz> and CDATA is interpreted.
> This does not happen if written directly to WebHDFS. For example:
> {code}
> [root@hdp250 ~]# cat xxx
> <document>
> <empty/>
> <![CDATA[<xyz>wibble</xyz>]]>
> </document>
> [root@hdp250 ~]# curl -u guest:guest-password -i -k -X PUT
> "https://hdp250.local:8443/gateway/default/webhdfs/v1/tmp/xxx?op=CREATE&overwrite=true";
> HTTP/1.1 307 Temporary Redirect
> Date: Thu, 27 Oct 2016 19:25:35 GMT
> Set-Cookie:
> JSESSIONID=bt3timb9jl7k546fcntrj8s;Path=/gateway/default;Secure;HttpOnly
> Expires: Thu, 01 Jan 1970 00:00:00 GMT
> Set-Cookie: rememberMe=deleteMe; Path=/gateway/default; Max-Age=0;
> Expires=Wed, 26-Oct-2016 19:25:35 GMT
> Cache-Control: no-cache
> Expires: Thu, 27 Oct 2016 19:25:35 GMT
> Date: Thu, 27 Oct 2016 19:25:35 GMT
> Pragma: no-cache
> Expires: Thu, 27 Oct 2016 19:25:35 GMT
> Date: Thu, 27 Oct 2016 19:25:35 GMT
> Pragma: no-cache
> Content-Type: application/octet-stream
> X-FRAME-OPTIONS: SAMEORIGIN
> Location:
> https://hdp250.local:8443/gateway/default/webhdfs/data/v1/webhdfs/v1/tmp/xxx?_=AAAACAAAABAAAAEQ-XO5sAM86ubmjRdUYXJEZkpM4Vdv3vmIprBetQwfaKaZNN4uc9O1IN8jujDD9GpPPCDJCKxebul_GlCFxDIZzbkhZ1tnhY5rZ6V12SVJgLo5DxMxC8zECeaM4M8OFLqHxamNnvduuUkD5y23RJczzHHJ9SyYuG6yiCpDJKB_5MffZIWFaEEcYM7jOkjStZHU_7cjIg_vRJL2nFCVTWKf1FPkB00QCbXHN-Ua6MfEG8p2aoQB70tfVHnmhhnBWx2PZARJ-kHp42rrpA1yrI86v3Q-OGI4Ya3pnPRWhPj0wbdDr_p_FDinsw2KRu1_aRSIXXznmJ--aX6TflbBGZvDImkw4x0QM48UGFpOChaLtHk73rlMMUbbbAwOew0gJ2-69PuXiL4QB48
> Server: Jetty(6.1.26.hwx)
> Content-Length: 0
> [root@hdp250 ~]# curl -u guest:guest-password -i -k -X PUT -T xxx -H
> 'Content-Type: text/xml'
> "https://hdp250.local:8443/gateway/default/webhdfs/data/v1/webhdfs/v1/tmp/xxx?_=AAAACAAAABAAAAEQ-XO5sAM86ubmjRdUYXJEZkpM4Vdv3vmIprBetQwfaKaZNN4uc9O1IN8jujDD9GpPPCDJCKxebul_GlCFxDIZzbkhZ1tnhY5rZ6V12SVJgLo5DxMxC8zECeaM4M8OFLqHxamNnvduuUkD5y23RJczzHHJ9SyYuG6yiCpDJKB_5MffZIWFaEEcYM7jOkjStZHU_7cjIg_vRJL2nFCVTWKf1FPkB00QCbXHN-Ua6MfEG8p2aoQB70tfVHnmhhnBWx2PZARJ-kHp42rrpA1yrI86v3Q-OGI4Ya3pnPRWhPj0wbdDr_p_FDinsw2KRu1_aRSIXXznmJ--aX6TflbBGZvDImkw4x0QM48UGFpOChaLtHk73rlMMUbbbAwOew0gJ2-69PuXiL4QB48";
> HTTP/1.1 100 Continue
> HTTP/1.1 201 Created
> Date: Thu, 27 Oct 2016 19:25:54 GMT
> Set-Cookie:
> JSESSIONID=3o27jby7c2a6mdpxducddqac;Path=/gateway/default;Secure;HttpOnly
> Expires: Thu, 01 Jan 1970 00:00:00 GMT
> Set-Cookie: rememberMe=deleteMe; Path=/gateway/default; Max-Age=0;
> Expires=Wed, 26-Oct-2016 19:25:54 GMT
> Location: https://hdp250.local:8443/gateway/default/webhdfs/v1/tmp/xxx
> Connection: close
> Server: Jetty(9.2.15.v20160210)
> [root@hdp250 ~]# hdfs dfs -cat /tmp/xxx
> <?xml version="1.0" standalone="no"?><document>
> <empty></empty>
> <xyz>wibble</xyz>
> </document>
> {code}
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