Tino Wildenhain wrote:

Hi,

in pure python you can also write: # ------------------------------------------------- import re

if re.search(r"[^A-Za-z0-9\.\-_]",string_name): raise Exception("illegal character here.")

# -------------------------------------------------

However this is untested. But you get the idea ;) re is certainly faster then in-loops.

Regards Tino

"Spicklemire, Jerry" wrote:

...

Marcello asked:

...

Is there a simple way to check if a string contain only this values: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_" and otherwise raise an error?

If you have a string you want to check, with the name "string_name":

<dtml-call "REQUEST.set('char_invalid', 'no')"> <dtml-let chars_valid="'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 .-_'"> <dtml-while "char_valid == 'no'"> <dtml-in string_name> <dtml-if "sequence-item !in chars_valid"> <dtml-call "REQUEST.set('char_invalid', 'yes')"> </dtml-if> </dtml-in> </dtml-while> </dtml-let> <dtml-if "char_invalid == 'no'"> <dtml-call "your raise_error_code"> </dtml-if>

This may not look as simple as you want, but in pure Python, (without alls the <dtml-stuff > this would be:

string_valid = 'yes' for char in string_name : if char !in 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789.-_' : string_valid = 'no' break

if string_valid == 'no' : (run your "raise error" code here)

Later, Jerry S.

FYI: There is no dtml-while tag. You cannot iterate a string with dtml-in 8^( To do this in dtml, the best thing is probably something like: set a tokens property called allowed_chars on the folder executing the method (or the root). This property should have all the allowed characters in it separated by spaces. Then use this DTML (untested): <dtml-in expr="_.range(_.len(string))"> <dtml-unless expr="string[_['sequence-item']] in allowed_chars"> <dtml-raise InvalidString>Invalid String</dtml-raise> </dtml-unless> </dtml-in> The performance of this would be much less than using an external python method and regular expressions however. -- | Casey Duncan | Kaivo, Inc. | cduncan@kaivo.com `------------------>

Thank you very much. Placed in an external method works great. Bye, MArcello Dennis Nichols wrote:

At 3/12/01 04:39 PM, Tino Wildenhain wrote:

...

in pure python you can also write: # ------------------------------------------------- import re

if re.search(r"[^A-Za-z0-9\.\-_]",string_name): raise Exception("illegal character here.")

# -------------------------------------------------

However this is untested. But you get the idea ;) re is certainly faster then in-loops.

I didn't test it either, but note that "." is not a special character inside the [] pair and that a bare "-" as the first or last character stands for itself. So the string could be more clearly written (imho) as just:

[^A-Za-z0-9._-]

-- Dennis Nichols nichols@tradingconnections.com

-- ---------------------------------------- Marcello Lupo Project Manager Atis Srl Via dell'Artigliere 2 37014 Castelnuovo del Garda (VR) Tel. +39-0457570960 - Fax +39-0457571268 E-mail: lupo@atisworld.com http://www.atisworld.com -----------------------------------------