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Code Issues Packages Projects Releases Wiki Activity

catch utf8 encoding errors and at least stop them aborting processing

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Brian Quinion
2012-05-04 00:58:26 +01:00
parent 7164fd310d
commit ee0afe8c64
1 changed files with 19 additions and 6 deletions
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25
sql/functions.sql
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@@ -1328,12 +1328,12 @@ BEGIN
select wikipedia_article.importance,wikipedia_article.language||':'||wikipedia_article.title
from wikipedia_article
where language = wiki_article_language and
(title = wiki_article_title OR title = decode_url_part(wiki_article_title) OR title = replace(decode_url_part(wiki_article_title),E'\\',''))
(title = wiki_article_title OR title = catch_decode_url_part(wiki_article_title) OR title = replace(catch_decode_url_part(wiki_article_title),E'\\',''))
UNION ALL
select wikipedia_article.importance,wikipedia_article.language||':'||wikipedia_article.title
from wikipedia_redirect join wikipedia_article on (wikipedia_redirect.language = wikipedia_article.language and wikipedia_redirect.to_title = wikipedia_article.title)
where wikipedia_redirect.language = wiki_article_language and
(from_title = wiki_article_title OR from_title = decode_url_part(wiki_article_title) OR from_title = replace(decode_url_part(wiki_article_title),E'\\',''))
(from_title = wiki_article_title OR from_title = catch_decode_url_part(wiki_article_title) OR from_title = replace(catch_decode_url_part(wiki_article_title),E'\\',''))
order by importance asc limit 1 INTO NEW.importance,NEW.wikipedia;
ELSE
@@ -1614,12 +1614,12 @@ BEGIN
select wikipedia_article.importance,wikipedia_article.language||':'||wikipedia_article.title
from wikipedia_article
where language = wiki_article_language and
(title = wiki_article_title OR title = decode_url_part(wiki_article_title) OR title = replace(decode_url_part(wiki_article_title),E'\\',''))
(title = wiki_article_title OR title = catch_decode_url_part(wiki_article_title) OR title = replace(catch_decode_url_part(wiki_article_title),E'\\',''))
UNION ALL
select wikipedia_article.importance,wikipedia_article.language||':'||wikipedia_article.title
from wikipedia_redirect join wikipedia_article on (wikipedia_redirect.language = wikipedia_article.language and wikipedia_redirect.to_title = wikipedia_article.title)
where wikipedia_redirect.language = wiki_article_language and
(from_title = wiki_article_title OR from_title = decode_url_part(wiki_article_title) OR from_title = replace(decode_url_part(wiki_article_title),E'\\',''))
(from_title = wiki_article_title OR from_title = catch_decode_url_part(wiki_article_title) OR from_title = replace(catch_decode_url_part(wiki_article_title),E'\\',''))
order by importance asc limit 1 INTO NEW.importance,NEW.wikipedia;
END IF;
@@ -2766,7 +2766,20 @@ LANGUAGE plpgsql;
-- See: http://stackoverflow.com/questions/6410088/how-can-i-mimic-the-php-urldecode-function-in-postgresql
CREATE OR REPLACE FUNCTION decode_url_part(p varchar) RETURNS varchar
AS $$
SELECT convert_from(CAST(E'\\x' || string_agg(CASE WHEN length(r.m[1]) = 1 THEN encode(convert_to(r.m[1], 'SQL_ASCII'), 'hex') ELSE substring(r.m[1] from 2 for 2) END, '') AS bytea), 'UTF8')
FROM regexp_matches($1, '%[0-9a-f][0-9a-f]|.', 'gi') AS r(m);
SELECT convert_from(CAST(E'\\x' || array_to_string(ARRAY(
SELECT CASE WHEN length(r.m[1]) = 1 THEN encode(convert_to(r.m[1], 'SQL_ASCII'), 'hex') ELSE substring(r.m[1] from 2 for 2) END
FROM regexp_matches($1, '%[0-9a-f][0-9a-f]|.', 'gi') AS r(m)
), '') AS bytea), 'UTF8');
$$
LANGUAGE SQL IMMUTABLE STRICT;
CREATE OR REPLACE FUNCTION catch_decode_url_part(p varchar) RETURNS varchar
AS $$
DECLARE
BEGIN
RETURN decode_url_part(p);
EXCEPTION
WHEN others THEN return null;
END;
$$
LANGUAGE plpgsql;