controlling user input

This WebDNA talk-list message is from

1998

It keeps the original formatting. numero = 18426
interpreted = N
texte = I have to verify user input for special fields where are only the followingcharacters are allowed:numbers (ascii 48-57)uppercase chars (ascii 65-90)lowercase chars (ascii 97-122)Therefore I step through the given word to find out if each character iswithin the allowed range. Since WebCat has no command to do a quick asciicomparison, I first tried something which basically looks like this: [GetChars start=[math]loopcounter[/math] &end=[math]loopcounter[/math]] [UserInput] [/GetChars]where start and end values come from a [loop] command and are incrementedat each run. So far, so good - but I had to add a bunch of showif's tocompare the chars and finally ended up in a mess of code for a simple thinglike three ascii ranges.I decided to loop like above, but instead the showif's I have a databasewith allowed values and do a lookup for each character of the given word.If I get a notfound, then an error message is displayed.That works fine (and is not used very often in this site), lookup is fast,but I wonder if subsequent lookups for up to 30 user-entered characters arethe state of the art in WebCat-programming ;-)Any other idea?Peter__________________________________________Peter Ostry - po@ostry.com - www.ostry.comOstry & Partner - Ostry Internet SolutionsAuhofstrasse 29 A-1130 Vienna Austriafon ++43-1-8777454 fax ++43-1-8777454-21 Associated Messages, from the most recent to the oldest:

Re: controlling user input (Kenneth Grome 1998)
controlling user input (Peter Ostry 1998)

I have to verify user input for special fields where are only the followingcharacters are allowed:numbers (ascii 48-57)uppercase chars (ascii 65-90)lowercase chars (ascii 97-122)Therefore I step through the given word to find out if each character iswithin the allowed range. Since WebCat has no command to do a quick asciicomparison, I first tried something which basically looks like this: [GetChars start=[math]loopcounter[/math] &end=[math]loopcounter[/math]] [UserInput] [/GetChars]where start and end values come from a [loop] command and are incrementedat each run. So far, so good - but I had to add a bunch of showif's tocompare the chars and finally ended up in a mess of code for a simple thinglike three ascii ranges.I decided to loop like above, but instead the showif's I have a databasewith allowed values and do a lookup for each character of the given word.If I get a notfound, then an error message is displayed.That works fine (and is not used very often in this site), lookup is fast,but I wonder if subsequent lookups for up to 30 user-entered characters arethe state of the art in WebCat-programming ;-)Any other idea?Peter__________________________________________Peter Ostry - po@ostry.com - www.ostry.comOstry & Partner - Ostry Internet SolutionsAuhofstrasse 29 A-1130 Vienna Austriafon ++43-1-8777454 fax ++43-1-8777454-21 Peter Ostry

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controlling user input

1998

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