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Posted to dev@hive.apache.org by "Jothy Babu (JIRA)" <ji...@apache.org> on 2013/02/01 06:05:14 UTC
[jira] [Updated] (HIVE-3906) URI_Escape and URI_UnEscape UDF
[ https://issues.apache.org/jira/browse/HIVE-3906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jothy Babu updated HIVE-3906:
-----------------------------
Description:
Current releases of Hive lacks a function which would encode URL or form parameters or it escapes the URI.
The function URI_ESCAPE (uri) would return the encoded form of the URI which would be useful while using HiveQL.Its always advisable to encode URL or form parameters; plain form parameter is vulnerable to cross site attack, SQL injection and may direct our web application into some unpredicted output.
Functionality :-
Function Name: URI_ESCAPE (uri)
Returns the encoded form of the uri.
Example: hive> SELECT URI_ESCAPE('http://www.example.com?a=l&t');
-> 'http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t'
Usage :-
Case 1 : To get encoded uri corresponding to a particular uri
hive> SELECT URI_ESCAPE('http://google.com/resource?key=value1 & value2');
-> 'http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2'
Case 2 : To query a table to get encoded form of the urls corresponding to users
Table :- USER_URLS
userid |url
USR00001|http://www.example.com?a=l&t
USR00010|http://search.barnesandnoble.com/booksearch/first book.pdf
USR00100|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4
USR01000|http://google.com/resource?key=value
USR10000|http://google.com/resource?key=value1 & value2
USR10001|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1
USR10010|gopher://gopher.voa.gov
USR10100|http://www.apple.com/index.html
USR11000|file:/data/letters/to_mom.txt
USR11001|http://www.cuug.ab.ca:8001/~branderr/csce.html
Query : select userid,url,uri_escape(uri) from USER_URLS;
Result :-
USR00001|http://www.example.com?a=l&t|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t
USR00010|http://search.barnesandnoble.com/booksearch/first book.pdf|http://search.barnesandnoble.com/booksearch/first%20book.pdf
USR00100|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf
USR01000|http://google.com/resource?key=value|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue
USR10000|http://google.com/resource?key=value1 & value2|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2
USR10001|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1
USR10010|gopher://gopher.voa.gov|gopher%3A%2F%2Fgopher.voa.gov
USR10100|http://www.apple.com/index.html|http%3A%2F%2Fwww.apple.com%2Findex.html
USR11000|file:/data/letters/to_mom.txt|file%3A%2Fdata%2Fletters%2Fto_mom.txt
USR11001|http://www.cuug.ab.ca:8001/~branderr/csce.html|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html
Current releases of Hive lacks a function which would decode the encoded uri.
The function URI_UNESCAPE (uri) would return the decoded form of the encoded URI which would be useful while using HiveQL.This function converts the specified string by replacing any escape sequences with their unescaped representation.
Functionality :-
Function Name: URI_UNESCAPE (uri)
Returns the decoded form of the encoded uri.
Example: hive> SELECT URI_UNESCAPE('http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t');
-> 'http://www.example.com?a=l&t'
Usage :-
Case 1 : To get decoded uri corresponding to a particular encoded uri
hive> SELECT URI_UNESCAPE('http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2');
-> 'http://google.com/resource?key=value1 & value2'
Case 2 : To query a table to get decoded form of the encoded urls corresponding to users
Table :- USER_URLS
userid |encodedurl
USR00001|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t
USR00010|http://search.barnesandnoble.com/booksearch/first%20book.pdf
USR00100|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf
USR01000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue
USR10000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2
USR10001|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1
USR10010|gopher%3A%2F%2Fgopher.voa.gov
USR10100|http%3A%2F%2Fwww.apple.com%2Findex.html
USR11000|file%3A%2Fdata%2Fletters%2Fto_mom.txt
USR11001|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html
Query : select userid,encodedurl,uri_unescape(encodedurl) from USER_URLS;
Result :-
USR00001|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t|http://www.example.com?a=l&t
USR00010|http://search.barnesandnoble.com/booksearch/first%20book.pdf|http://search.barnesandnoble.com/booksearch/first book.pdf
USR00100|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4
USR01000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue|http://google.com/resource?key=value
USR10000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2|http://google.com/resource?key=value1 & value2
USR10001|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1
USR10010|gopher%3A%2F%2Fgopher.voa.gov|gopher://gopher.voa.gov
USR10100|http%3A%2F%2Fwww.apple.com%2Findex.html|http://www.apple.com/index.html
USR11000|file%3A%2Fdata%2Fletters%2Fto_mom.txt|file:/data/letters/to_mom.txt
USR11001|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html|http://www.cuug.ab.ca:8001/~branderr/csce.html
> URI_Escape and URI_UnEscape UDF
> -------------------------------
>
> Key: HIVE-3906
> URL: https://issues.apache.org/jira/browse/HIVE-3906
> Project: Hive
> Issue Type: New Feature
> Components: UDF
> Affects Versions: 0.8.1
> Environment: Hadoop 0.20.1
> Java 1.6.0
> Reporter: Liu Zongquan
> Labels: patch
> Fix For: 0.8.1
>
> Original Estimate: 96h
> Remaining Estimate: 96h
>
> Current releases of Hive lacks a function which would encode URL or form parameters or it escapes the URI.
> The function URI_ESCAPE (uri) would return the encoded form of the URI which would be useful while using HiveQL.Its always advisable to encode URL or form parameters; plain form parameter is vulnerable to cross site attack, SQL injection and may direct our web application into some unpredicted output.
> Functionality :-
> Function Name: URI_ESCAPE (uri)
> Returns the encoded form of the uri.
> Example: hive> SELECT URI_ESCAPE('http://www.example.com?a=l&t');
> -> 'http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t'
> Usage :-
> Case 1 : To get encoded uri corresponding to a particular uri
> hive> SELECT URI_ESCAPE('http://google.com/resource?key=value1 & value2');
> -> 'http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2'
> Case 2 : To query a table to get encoded form of the urls corresponding to users
> Table :- USER_URLS
> userid |url
> USR00001|http://www.example.com?a=l&t
> USR00010|http://search.barnesandnoble.com/booksearch/first book.pdf
> USR00100|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4
> USR01000|http://google.com/resource?key=value
> USR10000|http://google.com/resource?key=value1 & value2
> USR10001|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1
> USR10010|gopher://gopher.voa.gov
> USR10100|http://www.apple.com/index.html
> USR11000|file:/data/letters/to_mom.txt
> USR11001|http://www.cuug.ab.ca:8001/~branderr/csce.html
> Query : select userid,url,uri_escape(uri) from USER_URLS;
> Result :-
> USR00001|http://www.example.com?a=l&t|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t
> USR00010|http://search.barnesandnoble.com/booksearch/first book.pdf|http://search.barnesandnoble.com/booksearch/first%20book.pdf
> USR00100|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf
> USR01000|http://google.com/resource?key=value|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue
> USR10000|http://google.com/resource?key=value1 & value2|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2
> USR10001|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1
> USR10010|gopher://gopher.voa.gov|gopher%3A%2F%2Fgopher.voa.gov
> USR10100|http://www.apple.com/index.html|http%3A%2F%2Fwww.apple.com%2Findex.html
> USR11000|file:/data/letters/to_mom.txt|file%3A%2Fdata%2Fletters%2Fto_mom.txt
> USR11001|http://www.cuug.ab.ca:8001/~branderr/csce.html|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html
> Current releases of Hive lacks a function which would decode the encoded uri.
> The function URI_UNESCAPE (uri) would return the decoded form of the encoded URI which would be useful while using HiveQL.This function converts the specified string by replacing any escape sequences with their unescaped representation.
> Functionality :-
> Function Name: URI_UNESCAPE (uri)
> Returns the decoded form of the encoded uri.
> Example: hive> SELECT URI_UNESCAPE('http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t');
> -> 'http://www.example.com?a=l&t'
> Usage :-
> Case 1 : To get decoded uri corresponding to a particular encoded uri
> hive> SELECT URI_UNESCAPE('http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2');
> -> 'http://google.com/resource?key=value1 & value2'
> Case 2 : To query a table to get decoded form of the encoded urls corresponding to users
> Table :- USER_URLS
> userid |encodedurl
> USR00001|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t
> USR00010|http://search.barnesandnoble.com/booksearch/first%20book.pdf
> USR00100|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf
> USR01000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue
> USR10000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2
> USR10001|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1
> USR10010|gopher%3A%2F%2Fgopher.voa.gov
> USR10100|http%3A%2F%2Fwww.apple.com%2Findex.html
> USR11000|file%3A%2Fdata%2Fletters%2Fto_mom.txt
> USR11001|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html
> Query : select userid,encodedurl,uri_unescape(encodedurl) from USER_URLS;
> Result :-
> USR00001|http%3A%2F%2Fwww.example.com%3Fa%3Dl%26t|http://www.example.com?a=l&t
> USR00010|http://search.barnesandnoble.com/booksearch/first%20book.pdf|http://search.barnesandnoble.com/booksearch/first book.pdf
> USR00100|http%3A%2F%2Fsearch.barnesandnoble.com%2Fbooksearch%2Ffirst%20book.pdf|http://abc.dev.domain.com/0007AC/ads/800x480 15sec h.264.mp4
> USR01000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue|http://google.com/resource?key=value
> USR10000|http%3A%2F%2Fgoogle.com%2Fresource%3Fkey%3Dvalue1%20%26%20value2|http://google.com/resource?key=value1 & value2
> USR10001|ftp%3A%2F%2Feau.ww.eesd.gov.calgary%2Fhome%2Fsmith%2Fbudget.wk1|ftp://eau.ww.eesd.gov.calgary/home/smith/budget.wk1
> USR10010|gopher%3A%2F%2Fgopher.voa.gov|gopher://gopher.voa.gov
> USR10100|http%3A%2F%2Fwww.apple.com%2Findex.html|http://www.apple.com/index.html
> USR11000|file%3A%2Fdata%2Fletters%2Fto_mom.txt|file:/data/letters/to_mom.txt
> USR11001|http%3A%2F%2Fwww.cuug.ab.ca%3A8001%2F%7Ebranderr%2Fcsce.html|http://www.cuug.ab.ca:8001/~branderr/csce.html
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