regex url validator?

[Sean Cole (Pi)]

Tom,
I've looked at the docs and I'm not sure how to make it much clearer.
Perhaps you have a suggestion?
The examples given are:

local tVar put the propertyNames into tVar filter tVar with "[az]*" -- tVar
contains all property names beginning with a or z

This one is NOT a regular expression (regEx) but is the same as specifying
it to be a wildcard pattern.

-- Filtering a string literal causes the filtered string to be placed in
the it variable filter items of "apple,banana,cherry" with regex pattern
"b.*" -- it contains "banana"

This one is and is clearly indicated.

Perhaps we could move things about a bit.
The description say:

The filter...without form and the filter...not matching form discard the
lines, items, keys or elements that do not contain a match for the
specified filterPattern.

This could possibly be written better to read:

The 'filter...without' form and the 'filter...not matching' form discard
the lines, items, keys or elements that do not contain a match for the
specified filterPattern.

This could then be followed by the 'Wildcard pattern' description which is
NOT regEx. It's the same as not specifying a pattern. That would mean
putting the RegEx description further towards the end making it obvious to
be something different from *filter x with/without [wildcard pattern]*

What does everyone think?

Sean


On Tue, 23 Oct 2018 at 16:51, Sean Cole (Pi) <sean at pidigital.co.uk> wrote:

> Maybe the documentation needs a tweak.
>
>
> Will do...
>
> Sean
>
>
> On Tue, 23 Oct 2018 at 15:04, Tom Glod via use-livecode <
> use-livecode at lists.runrev.com> wrote:
>
>> <SOLVED>
>>
>> I originally used
>>
>> filter the lines of my_container with myregex
>>
>> or filter my_container with myregex
>>
>> none of the expressions worked..... just blanked out.
>>
>> When I used the same form as Steve...it worked.
>>
>> filter my_container with regex pattern myregex   into my_variable
>>
>> So is that a bug in the filter command? literally lost hours on this.
>>
>>
>>
>> Thank you all ..... onto some working code. :)
>>
>>
>> On Tue, Oct 23, 2018 at 9:27 AM Stephen MacLean via use-livecode <
>> use-livecode at lists.runrev.com> wrote:
>>
>> > Hi Tom,
>> >
>> > Don’t know if you found a solution yet, but this is from the rsIsValid
>> > suite I put together a few years back.
>> >
>> > http://forums.livecode.com/viewtopic.php?f=16&t=26653&p=138698#p138698
>> <
>> > http://forums.livecode.com/viewtopic.php?f=16&t=26653&p=138698#p138698
>> >.
>> > https://github.com/renegadesteve/rsIsValid <
>> > https://github.com/renegadesteve/rsIsValid>
>> >
>> >
>> > Below is the LCS version:
>> > function rsIsValidURL pURL
>> >
>> > put pURL into tCC
>> >
>> > // get scheme
>> >
>> > put "^(?<scheme>[a-z][a-z0-9+\-.]*):" into tSchemeRegex
>> >
>> > get matchText(tCC, tSchemeRegex,tScheme)
>> >
>> > // check scheme for http, https, ftp, ftps, mailto, nntp, news, or file
>> >
>> > if it <> true then return false
>> >
>> > if tScheme = "mailto" then
>> >
>> > //get the email address from the URL and then validate it
>> >
>> > delete char 1 to 7 of tCC
>> >
>> > return rsIsValidEmail_LC(tCC)
>> >
>> > else
>> >
>> > // setup the regex pattern
>> >
>> > put "^(?:http://|https://|ftp://
>> |ftps://|nntp://|news://)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\x{00a1}-\x{ffff}0-9]-*)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.(?:[a-z\x{00a1}-\x{ffff}0-9]-*)*[a-z\x{00a1}-\x{ffff}0-9]+)*(?:\.(?:[a-z\x{00a1}-\x{ffff}]{2,}))\.?)(?::\d{2,5})?(?:[/?#]\S*)?$"
>> > into tURLRegex
>> >
>> > // run filter against regex pattern and set result to true if it
>> matches.
>> >
>> > filter tCC with regex pattern tURLRegex into tMatch
>> >
>> > if tMatch <> empty then
>> >
>> > return true
>> >
>> > else
>> >
>> > return false
>> >
>> > end if
>> >
>> > end if
>> >
>> > end rsIsValidURL
>> >
>> >
>> > Best,
>> >
>> > Steve MacLean
>> >
>> > > On Oct 22, 2018, at 10:07 PM, Tom Glod via use-livecode <
>> > use-livecode at lists.runrev.com> wrote:
>> > >
>> > > Hi peeps,
>> > >
>> > > I'm trying to use regex to validate a list of URLs
>> > >
>> > > I've tried 4 or 5 different "regular" expressions that supposedly work
>> > > ..... but LC does not give me anything back.  None of them work,
>> > >
>> > > Like for example ... this one.
>> > >
>> > >
>> >
>> ^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$
>> > >
>> > > or this one
>> > >
>> > > /^(https?:\/\/)?([\da-z\.-]+)\.([a-z\.]{2,6})([\/\w \.-]*)*\/?$/
>> > >
>> > > or this one just to make sure
>> > >
>> > > (https?://([-\w\.]+)+(:\d+)?(/([\w/_\.]*(\?\S+)?)?)?)
>> > >
>> > > Does anyone know how to get these or others to work in LC?
>> > >
>> > > Thanks,
>> > >
>> > > Tom
>> > > _______________________________________________
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