plsql - url desde plsql

Para consultar desde plsql los url de saf que vienen en evento 4 y 8

CREATE OR REPLACE PROCEDURE show_url
(
    url      IN VARCHAR2,
    username IN VARCHAR2 DEFAULT NULL,
    password IN VARCHAR2 DEFAULT NULL
) AS
    req       utl_http.req;
    resp      utl_http.resp;
    name      VARCHAR2(256);
    value     VARCHAR2(1024);
    data      VARCHAR2(255);
    my_scheme VARCHAR2(256);
    my_realm  VARCHAR2(256);
    my_proxy  BOOLEAN;
BEGIN
-- When going through a firewall, pass requests through this host.
-- Specify sites inside the firewall that don't need the proxy host.
  utl_http.set_proxy('proxy.my-company.com', 'corp.my-company.com');

-- Ask UTL_HTTP not to raise an exception for 4xx and 5xx status codes,
-- rather than just returning the text of the error page.
  utl_http.set_response_error_check(FALSE);

-- Begin retrieving this web page.
  req := utl_http.begin_request(url);

-- Identify ourselves. Some sites serve special pages for particular browsers.
  utl_http.set_header(req, 'User-Agent', 'Mozilla/4.0');

-- Specify a user ID and password for pages that require them.
  IF (username IS NOT NULL) THEN
    utl_http.set_authentication(req, username, password);
  END IF;

  BEGIN
-- Now start receiving the HTML text.
    resp := utl_http.get_response(req);

-- Show the status codes and reason phrase of the response.
    dbms_output.put_line('HTTP response status code: ' || resp.status_code);
    dbms_output.put_line('HTTP response reason phrase: ' || resp.reason_phrase);

-- Look for client-side error and report it.
    IF (resp.status_code >= 400) AND (resp.status_code <= 499) THEN

-- Detect whether the page is password protected, and we didn't supply
-- the right authorization.
      IF (resp.status_code = utl_http.HTTP_UNAUTHORIZED) THEN
        utl_http.get_authentication(resp, my_scheme, my_realm, my_proxy);
        IF (my_proxy) THEN
          dbms_output.put_line('Web proxy server is protected.');
          dbms_output.put('Please supply the required ' || my_scheme ||
            ' authentication username/password for realm ' || my_realm ||
            ' for the proxy server.');
        ELSE
          dbms_output.put_line('Web page ' || url || ' is protected.');
          dbms_output.put('Please supplied the required ' || my_scheme ||
            ' authentication username/password for realm ' || my_realm ||
            ' for the Web page.');
        END IF;
      ELSE
        dbms_output.put_line('Check the URL.');
      END IF;

      utl_http.end_response(resp);
      RETURN;

-- Look for server-side error and report it.
    ELSIF (resp.status_code >= 500) AND (resp.status_code <= 599) THEN

      dbms_output.put_line('Check if the Web site is up.');
      utl_http.end_response(resp);
      RETURN;

    END IF;
    
-- The HTTP header lines contain information about cookies, character sets,
-- and other data that client and server can use to customize each session.
    FOR i IN 1..utl_http.get_header_count(resp) LOOP
      utl_http.get_header(resp, i, name, value);
      dbms_output.put_line(name || ': ' || value);
    END LOOP;

-- Keep reading lines until no more are left and an exception is raised.
    LOOP
      utl_http.read_line(resp, value);
      dbms_output.put_line(value);
    END LOOP;
  EXCEPTION
    WHEN utl_http.end_of_body THEN
    utl_http.end_response(resp);
  END;

END;
/
SET serveroutput ON 
-- The following URLs illustrate the use of this procedure,
-- but these pages do not actually exist. To test, substitute
-- URLs from your own web server.
exec show_url('http://www.oracle.com/no-such-page.html')
exec show_url('http://www.oracle.com/protected-page.html')
exec show_url('http://www.oracle.com/protected-page.html', 'scott', 'tiger')