Re: Validate URL in RPG

On Wed, 2019-05-15 at 14:22 +0200, Carel wrote:

Think he wants to do a PING from an RPGLE program.

Oh I see now, I misread the reply and wanted a way to actually validate
the URL against a server.

Obviously that would require more knowledge of the type of URL, and then
various requests made to the servers. Web URL's could be done using
Scott Klement's HTTPAPI or various other methods (I'm not 100% sure but
I believe that SQL can go out to the web) and as you mention a ping
(although that wouldn't be as deep as a url).

Maybe the system API can be used for that. Or using QSH.

Kind regards,
Carel Teijgeler

Op 15-5-2019 om 12:16 schreef Jonathan Wilson:

On Wed, 2019-05-15 at 09:54 +0000, Jean-Marc DUVAL wrote:

Thanks Jonathan for this great regular expression for offline structure controls that allows me to do a pre-check but here I would like to check the existence of this URL in an RPG program.

Sorry, should have been slightly clearer when I said it was possible to
use C, SQL, something else... from within RPG you can call C API's and
SQL. Both of which provide methods to do regex matching.

Some pointers to get you started.

C
http://www.scottklement.com/rpg/copybooks/regex_h.rpgle.txt
https://www.ibm.com/developerworks/community/forums/html/topic?id=355b0d77-a5e6-46c2-af6e-8ffe9641f497
SQL
https://www.nicklitten.com/simple-email-validation-sql-rpg-ile-program/

Obviously you could do it the long way with RPG checks and substs and
scans and trims... but why re-invent the wheel :-)

Regards,

Jean-Marc DUVAL

-----Message d'origine-----
De : RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> De la part de Jonathan Wilson
Envoyé : mercredi 15 mai 2019 10:47
À : rpg400-l@xxxxxxxxxxxxxxxxxx
Objet : Re: Validate URL in RPG

On Wed, 2019-05-15 at 08:26 +0000, Jean-Marc DUVAL wrote:

Hello everyone

I need to control that a URL entered by a user is valid.
Would anyone have an example of RPG code for this?

I'm going to have to say that regex might be the best way (I know nothing about regex) as there are a good few examples on the interwebby.
(https://www.regextester.com/98055)

Likewise, there are examples of using regex from within RPG such as via SQL (possibly others, maybe C, or an API?).

The expression required is (remove quotes) "(ftp|http|https):\/\/(\w
+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?"

Hope this helps.

Regards,

Jean-Marc DUVAL

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