Problem getting RSS feeds on Scandinavian characters

Hello

I have problem in retrieving the RSS feeds of some streams, Scandinavian characters are converted.
When I discover stream source, characters are correct. So I guess that the problem could be my XML request.
Example of RSS feed
http://www.mtv3.fi/rss/urheilu_f1.rss
I get results like
Pakokaasuvirtausten hyödyntäminen rajoitetaan minimiin
That should say
Pakokaasuvirtausten hyädyntäminen rajoitetaan minimiin
And the problem occur not e.g. foods from here
http://www.hs.fi/uutiset/rss/
I use below table and package to get RSS fead and store it in the clob column
CREATE TABLE rss
  (payload CLOB
  );

create or replace
PACKAGE RSS_UTIL AS
  g_wallet_path     CONSTANT VARCHAR2(200) := 'file:/somepath/wallets';
  g_wallet_pass     CONSTANT VARCHAR2(200) := 'verysecret';
  g_collection_name CONSTANT VARCHAR2(200) := 'RSS_RESPONSE';
  g_user_agent      CONSTANT VARCHAR2(200) := 'Mozilla/5.0';
--------------------------------------------------------------------------------
  PROCEDURE get_rss_feed(
    p_url IN VARCHAR2
  );
END;
/
create or replace
PACKAGE BODY RSS_UTIL AS
  PROCEDURE get_rss_feed(
    p_url IN VARCHAR2
  )
  AS
    l_clob      CLOB;
    l_buffer    VARCHAR2(32767);
    l_http_req  utl_http.req;
    l_http_resp utl_http.resp;
  BEGIN
  --  
    --utl_http.set_wallet(g_wallet_path, g_wallet_pass);
    --
    utl_http.set_proxy(apex_application.g_proxy_server, NULL);
    --
    l_http_req  := utl_http.begin_request(p_url);
    --
    utl_http.set_header(l_http_req, 'User-Agent', g_user_agent);
    --
    l_http_resp := utl_http.get_response(l_http_req);
    --
    dbms_lob.createtemporary(l_clob, FALSE);
    dbms_lob.open(l_clob, dbms_lob.lob_readwrite);
    --
    BEGIN
      LOOP
        utl_http.read_text(l_http_resp, l_buffer);
        dbms_lob.writeappend(l_clob, LENGTH(l_buffer), l_buffer);
      END LOOP;
    EXCEPTION WHEN utl_http.end_of_body THEN
      NULL;
    END;
    --
    utl_http.end_response(l_http_resp);
    --
    EXECUTE IMMEDIATE 'TRUNCATE TABLE RSS';
    INSERT INTO RSS VALUES(l_clob);
    COMMIT;
  --
  END;
END;
/

BEGIN
  rss_util.get_rss_feed('http://www.mtv3.fi/rss/urheilu_f1.rss');
END;
/
And I query the clob data by
SELECT extractValue(value(t), '//link/text()')   AS LINK,
  extractValue(value(t), '//category[1]/text()') AS category,
  extractValue(value(t), '//category[2]/text()') AS sub_category,
  extractValue(value(t), '//title/text()')       AS title,
  extractValue(value(t), '//description/text()') AS description,
  extractValue(value(t), '//author/text()')      AS author,
  extractValue(value(t), '//pubDate/text()')     AS rss_date
FROM rss,
  TABLE(xmlsequence(extract(xmltype(rss.payload),'//rss/channel/item'))) t ;
I also like Apex app if you like check
http://ActioNet.homelinux.NET/HTMLDB/lspdemo?p=48
Just press the Connect button to enter application.

Only difference is I have store RSS apex_collection clob column and where questioning the report.

How can I change my code or the query to solve this problem?

Kind regards
Jari

http://dbswh.webhop.NET/dbswh/f?p=blog:Home:0

OK, finally found the explanation...

We will check the HTTP response for each request headers:

http://www.HS.fi/Uutiset/RSS/

SQL> set serveroutput on
SQL> DECLARE
  2
  3    req     utl_http.req;
  4    resp    utl_http.resp;
  5    hname   varchar2(200);
  6    hvalue  varchar2(200);
  7
  8  BEGIN
  9
 10    req  := utl_http.begin_request('http://www.hs.fi/uutiset/rss/');
 11    utl_http.set_header(req, 'User-Agent', 'Mozilla/5.0');
 12    resp := utl_http.get_response(req);
 13
 14    for i in 1..utl_http.get_header_count(resp) loop
 15      utl_http.get_header(r => resp ,n => i, name => hname, value => hvalue);
 16      dbms_output.put_line(hname || ' : ' || hvalue);
 17    end loop;
 18
 19    utl_http.end_response(resp);
 20
 21  END;
 22  /

Date : Thu, 08 Dec 2011 22:01:21 GMT
Cache-Control : max-age=120
Expires : Thu, 08 Dec 2011 22:03:21 GMT
Content-Type : text/xml;charset=utf-8
Content-Length : 8208
Keep-Alive : timeout=15, max=99
Connection : Keep-Alive

Charset is UTF-8 and consistent with the XML prologue.

Now, the flow of problem:

http://www.MTV3.fi/RSS/urheilu_f1.RSS

SQL> DECLARE
  2
  3    req     utl_http.req;
  4    resp    utl_http.resp;
  5    hname   varchar2(200);
  6    hvalue  varchar2(200);
  7
  8  BEGIN
  9
 10    req  := utl_http.begin_request('http://www.mtv3.fi/rss/urheilu_f1.rss');
 11    utl_http.set_header(req, 'User-Agent', 'Mozilla/5.0');
 12    resp := utl_http.get_response(req);
 13
 14    for i in 1..utl_http.get_header_count(resp) loop
 15      utl_http.get_header(r => resp ,n => i, name => hname, value => hvalue);
 16      dbms_output.put_line(hname || ' : ' || hvalue);
 17    end loop;
 18
 19    utl_http.end_response(resp);
 20
 21  END;
 22  /

Server : nginx
Date : Thu, 08 Dec 2011 22:04:20 GMT
Content-Type : text/xml
Connection : close
Vary : Accept-Encoding
Last-Modified : Thu, 08 Dec 2011 21:56:56 GMT
ETag : "be970e-fb94-4b39bbf33fa00"
Content-Length : 64404
Cache-control : public
Accept-Ranges : bytes

The Content-Type header does not specify the character set, so according to the HTTP/1.1 protocol, the default character set is ISO-8859-1, which is not compatible with the declared XML coding.

As a quick fix, you can use this to retrieve the binary content instead:

SQL> SELECT extractValue(value(t), '/item/link')        AS LINK,
  2         extractValue(value(t), '/item/category[1]') AS category,
  3         extractValue(value(t), '/item/category[2]') AS sub_category,
  4         extractValue(value(t), '/item/title')       AS title,
  5         extractValue(value(t), '/item/description') AS description,
  6         extractValue(value(t), '/item/author')      AS author,
  7         extractValue(value(t), '/item/pubDate')     AS rss_date
  8  FROM TABLE(
  9         XMLSequence(
 10           extract(
 11             xmltype(httpuritype('http://www.mtv3.fi/rss/urheilu_f1.rss').getBLOB(), nls_charset_id('AL32UTF8'))
 12           , '/rss/channel/item'
 13           )
 14         )
 15       ) t
 16  WHERE rownum < 5
 17  ;

LINK                                                                             CATEGORY           SUB_CATEGORY      TITLE                                                           DESCRIPTION                                                                      AUTHOR        RSS_DATE
-------------------------------------------------------------------------------- ------------------ ----------------- --------------------------------------------------------------- -------------------------------------------------------------------------------- ------------- -------------------------------
http://www.mtv3.fi/urheilu/f1/uutiset.shtml/2011/12/1457011/kovalaisen-talli-vah F1                                   Kovalaisen talli vahvisti uuden aero-pomon palkkaamisen         F1-sarjan Caterham-talli vahvisti torstaina pestanneensa John Ileyn tallin uudek               08 Dec 2011 23:27:07 +0200
http://www.mtv3.fi/urheilu/f1/uutiset.shtml/2011/12/1456562/grosjeanista-raikkos F1                                   Grosjeanista Räikkösen tallitoveri?                             Lotus F1 Team on pestannut ensi kaudeksi Romain Grosjeanin Kimi Räikkösen tallit               08 Dec 2011 12:07:21 +0200
http://www.mtv3.fi/urheilu/f1/uutiset.shtml/2011/12/1456557/myos-sauber-eroaa-f1 F1                                   Myös Sauber eroaa F1-talliyhdistyksestä                         Myös Sauber-talli on päättänyt erota Ferrarin ja Red Bullin tapaan F1-talliyhdis               08 Dec 2011 12:03:49 +0200
http://www.mtv3.fi/urheilu/f1/uutiset.shtml/2011/12/1456003/usan-gp-pysyi-f1-kal F1                                   USA:n GP pysyi F1-kalenterissa                                  Kansainvälisen autoliiton FIA:n maailmanneuvoston keskiviikkona julkaisemaan kau               07 Dec 2011 20:01:52 +0200

or do it via UTL_HTTP. READ_TEXT with a RAW buffer.

Edited by: odie_63 Dec 9. 2011 00:00

Tags: Database

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