select a random captcha
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@ -89,7 +89,7 @@ class Captcha(throttle: Int) extends DBConn {
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}
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def getChallenge(param: Parameters): Id = {
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val rs = stmt.executeQuery("SELECT token FROM challenge WHERE solved=FALSE LIMIT 1")
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val rs = stmt.executeQuery("SELECT token FROM challenge WHERE solved=FALSE ORDER BY RAND() LIMIT 1")
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val id = if(rs.next()){
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rs.getString("token")
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} else {
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