* 回复内容中包含的链接未经审核,可能存在风险,暂不予完整展示!
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DELIMITER ;
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DROP FUNCTION IF EXISTS urlencode;
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DELIMITER |
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CREATE FUNCTION urlencode (s VARCHAR(4096)) RETURNS VARCHAR(4096)08.
DETERMINISTIC
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CONTAINS SQL
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BEGIN
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DECLARE c VARCHAR(4096) DEFAULT "";
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DECLARE pointer INT DEFAULT 1;
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DECLARE s2 VARCHAR(4096) DEFAULT "";
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IF ISNULL(s) THEN
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RETURN NULL;
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ELSE
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SET s2 = "";
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WHILE pointer <= length(s) DO
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SET c = MID(s,pointer,1);
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IF c = " " THEN
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SET c = "+";
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ELSEIF NOT (ASCII(c) BETWEEN 48 AND 57 OR24.
ASCII(c) BETWEEN 65 AND 90 OR
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ASCII(c) BETWEEN 97 AND 122) THEN
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SET c = concat("%",LPAD(CONV(ASCII(c),10,16),2,0));27.
END IF;
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SET s2 = CONCAT(s2,c);
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SET pointer = pointer + 1;
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END while;
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END IF;
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RETURN s2;
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END;
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DELIMITER ;
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DROP FUNCTION IF EXISTS urldecode;
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DELIMITER |
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CREATE FUNCTION urldecode (s VARCHAR(4096)) RETURNS VARCHAR(4096)06.
DETERMINISTIC
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CONTAINS SQL
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BEGIN
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DECLARE c VARCHAR(4096) DEFAULT "";
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DECLARE pointer INT DEFAULT 1;
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DECLARE h CHAR(2);
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DECLARE h1 CHAR(1);
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DECLARE h2 CHAR(1);
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DECLARE s2 VARCHAR(4096) DEFAULT "";
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IF ISNULL(s) THEN
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RETURN NULL;
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ELSE
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SET s2 = "";
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WHILE pointer <= LENGTH(s) DO
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SET c = MID(s,pointer,1);
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IF c = "+" THEN
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SET c = " ";
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ELSEIF c = "%" AND pointer + 2 <= LENGTH(s) THEN25.
SET h1 = LOWER(MID(s,pointer+1,1));
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SET h2 = LOWER(MID(s,pointer+2,1));
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IF (h1 BETWEEN "0" AND "9" OR h1 BETWEEN "a" AND "f")28.
AND
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(h2 BETWEEN "0" AND "9" OR h2 BETWEEN "a" AND "f")30.
THEN
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SET h = CONCAT(h1,h2);
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SET pointer = pointer + 2;
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SET c = CHAR(CONV(h,16,10));
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END IF;
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END IF;
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SET s2 = CONCAT(s2,c);
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SET pointer = pointer + 1;
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END while;
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END IF;
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RETURN s2;
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END;
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DELIMITER ;
当一个字符串经过多次 urlencode 处理之后,可以使用 multiurldecode来解码,它将多次调用 urldecode来解码,直到没有需要解码的字符www.i***.net
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DELIMITER ;
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DROP FUNCTION IF EXISTS multiurldecode;
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DELIMITER |
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CREATE FUNCTION multiurldecode (s VARCHAR(4096)) RETURNS VARCHAR(4096)08.
DETERMINISTIC
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CONTAINS SQL
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BEGIN
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DECLARE pr VARCHAR(4096) DEFAULT "";
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IF ISNULL(s) THEN
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RETURN NULL;
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END IF;
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REPEAT
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SET pr = s;
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SELECT urldecode(s) INTO s;
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UNTIL pr = s END REPEAT;
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RETURN s;
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END;
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DELIMITER ;