Oracle SQL

A couple days ago i created simple package for HTTPS/HTTP, but I’ve decided now to improve it:

Timeout parameter – it would be better to control connection time;
Simple page parsing with PCRE regular expressions – to speed up and simplify page parsing, because if you want to get big number matched expressions from CLOB with regexp_xxx oracle functions, you have to call these functions many times with different [occurance] parameters, passing/accessing to the clob many times. But within java procedure it will be just one pass.
Support of plsqldoc – the tool for automatically generating documentation in HTML format.(javadoc analogue)

Upd 2015-10-11:

added HttpMethod parameter – so you can choose POST or GET method
added function get_last_response – returns last HTTP response code.

You can download new version from github: https://github.com/xtender/xt_http
Also it may be interesting if you want to see how to get collection of CLOBs/varchar2 from JAVA stored procedure.

So with new functions I can even more easy get UpVoters list from prevous post:

select * 
from table(
         xt_http.get_matches(
            pUrl     => '&url'
           ,pPattern => 'alt="([^"]+)"'
           ,pGroup   => 1
         )
    ) t

Results

select * 
from table(
         xt_http.get_matches(
            pUrl     => '&url'
           ,pPattern => 'alt="([^"]+)"'
           ,pGroup   => 1
         )
    ) t
/
Enter value for url: https://community.oracle.com/voting-history.jspa?ideaID=6901&start=0&numResults=1000

NAME
--------------------------------------------------
Denes Kubicek
Pavel Luzanov
Martin Preiss
AlexAA
scherbak
TimHall
Toon Koppelaars
Dom Brooks
mweedman
BluShadow
Dmitry-Oracle
Mahir M. Quluzade
SA2
Dmitry A. Bogomolov
SQL*Plus
Alexander.Ryndin-Oracle
Mohamed Houri
Randolf Geist
ctrieb
UltraBlast
Kot Dmitriy
user9506228
Timur Akhmadeev
Franck Pachot
pudge
user12068799
user11933056
user11994768
iRAV
user12228999
nicher100
vva
Alexander Semenov
Dmitry_Nikiforov
Bud Light
user7111641
dbms_photoshop
AcidMan
achervov
GokhanAtil
user2616810
Harun Kucuksabanoglu
_Nikotin
Maki
user9066618
user10487079
IgorUsoltsev
edw_otn
Vigneswar Battu
user11198823
be here now
869219
user7543311
VladimirSitnikov
kamineff
Asmodeus
djeday84
Oleh Tyshchenko
87Rb-87Sr
911978
KoTTT
Konstantin
945154
953255
user12217223
Alexander_Anokhin-Oracle
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Jack10154746
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Yury Pudovchenko
Sergey Navrotskiy
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MatthiasRogel
Mikhail Velikikh
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Oren Nakdimon
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KSDaemon
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Alfredo Abate
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Trihin Pavel
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Menno Hoogendijk
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AKalugin
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RZGiampaoli
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BobDJ
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ApInvent
Pinto Das
natalka
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-KE-
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oleksii.kondratenko
zeynep.samsa
Mehmet Kaplan
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create or replace and compile java source named xt_http as package org.orasql.xt_http; import javax.net.ssl.HttpsURLConnection; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.MalformedURLException; import java.net.URL; import java.net.HttpURLConnection; import java.sql.Connection; import oracle.jdbc.driver.*; import oracle.sql.CLOB; public class XT_HTTP { /** * Function getPage * @param String Page URL * @return String */ public static CLOB getPage(java.lang.String sURL) throws java.sql.SQLException { OracleDriver driver = new OracleDriver(); Connection conn = driver.defaultConnection(); CLOB result = CLOB.createTemporary(conn, false, CLOB.DURATION_CALL); result.setString(1," "); try { URL url = new URL(sURL); HttpURLConnection con = (HttpURLConnection)url.openConnection(); //HttpsURLConnection con = (HttpsURLConnection)url.openConnection(); if(con!=null){ BufferedReader br = new BufferedReader( new InputStreamReader(con.getInputStream())); StringBuilder sb = new StringBuilder(); String line; while ((line = br.readLine()) != null){ sb.append(line); } br.close(); result.setString(1,sb.toString()); } } catch (MalformedURLException e) { result.setString(1, e.getMessage()); } catch (IOException e) { result.setString(1, e.getMessage()); } return result; } public static java.lang.String getString(java.lang.String sURL) { String result=""; try { URL url = new URL(sURL); HttpURLConnection con = (HttpURLConnection)url.openConnection(); if(con!=null){ BufferedReader br = new BufferedReader( new InputStreamReader(con.getInputStream())); StringBuilder sb = new StringBuilder(); String line; while ((line = br.readLine()) != null){ sb.append(line); } br.close(); result = sb.toString().substring(0,3999); } } catch (MalformedURLException e) { return e.getMessage(); } catch (IOException e) { return e.getMessage(); } return result; } } /

create or replace package XT_HTTP is /** * Get page as CLOB */ function get_page(pURL varchar2) return clob IS LANGUAGE JAVA name 'org.orasql.xt_http.XT_HTTP.getPage(java.lang.String) return oracle.sql.CLOB'; /** * Get page as varchar2(max=4000 chars) */ function get_string(pURL varchar2) return varchar2 IS LANGUAGE JAVA name 'org.orasql.xt_http.XT_HTTP.getString(java.lang.String) return java.lang.String'; end XT_HTTP; /

dbms_java.grant_permission( grantee => 'XTENDER' -- username , permission_type => 'SYS:java.net.SocketPermission' -- connection permission , permission_name => 'ya.ru:443' -- connection address and port , permission_action => 'connect,resolve' -- types );

USAGE example: declare c clob; s varchar2(8000); begin --- Through HTTPS as CLOB: c:=xt_http.get_page('https://google.com'); --- Through HTTP as CLOB c:=xt_http.get_page('http://ya.ru'); --- Through HTTPS as varchar2: s:=xt_http.get_string('https://google.com'); --- Through HTTP as varchar2 s:=xt_http.get_string('http://ya.ru'); end; / select length( xt_http.get_page('https://google.com') ) page_size from dual