topic Re: RegEx IP validation in Application Development and Automation Discussions

RegEx IP validation

former_member194669 — Tue, 24 Jun 2008 17:46:38 GMT

Hi All,

I am using the following RegEx for validation of IP address, it is not validating


{^(d|[1-9]d|1dd|2[0-4]d|25[0-5]).(d|[1-9]d|1dd|2[0-4]d|25[0-5])
.(d|[1-9]d|1dd|2[0-4]d|25[0-5]).(d|[1-9]d|1dd|2[0-4]d|25[0-5])$}

Any Info?

a®

Re: RegEx IP validation

b_deterd2 — Tue, 24 Jun 2008 18:44:00 GMT

Hi,

try something else like,



\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

Hope it helps,

Bert

Re: RegEx IP validation

former_member194669 — Tue, 24 Jun 2008 19:11:22 GMT

I have tried with DEMO_REGEX_TOY but it is giving "invalid regex expression"

Any info?

a®

Re: RegEx IP validation

marcelo_ramos1 — Tue, 24 Jun 2008 19:35:37 GMT

Hi a®s,

You can see a lot of example here regular-expressions.info.

We can find the follow sample:

IP Addresses

- Matching an IP address is another good example of a trade-off between regex complexity and exactness.

 d{1,3}.d{1,3}.d{1,3}.d{1,3}

will match any IP address just fine, but will also match 999.999.999.999 as if it were a valid IP address. Whether this is a problem depends on the files or data you intend to apply the regex to.

- To restrict all 4 numbers in the IP address to 0..255, you can use this complex beast:

 (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)

Analyze this regular expression with RegexBuddy (everything on a single line). The long regex stores each of the 4 numbers of the IP address into a capturing group. You can use these groups to further process the IP number.

- If you don't need access to the individual numbers, you can shorten the regex with a quantifier to:

 (?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)

Analyze this regular expression with RegexBuddy. Similarly, you can shorten the quick regex to

 (?:d{1,3}.){3}d{1,3}

Analyze this regular expression with RegexBuddy

Font: http://www.regular-expressions.info/examples.html

Based on this examples:

You can do:


REPORT  zregex.

DATA ip TYPE string VALUE '10.10.0.10'. " Correct
DATA ip2 TYPE string VALUE '10.10.0.'. " Incorrect
DATA ip4 TYPE string VALUE '999.10.0.10'. " Incorrect

DATA validation TYPE string VALUE ' (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?) '.

START-OF-SELECTION.

  "// Test all <IPx>
  FIND REGEX validation IN ip.

  IF sy-subrc IS NOT INITIAL.
    "// Error
  ELSE.
    "// It's OK
  ENDIF.

As I Copy & Past the code from internet, please don't reward for me !

Share ours knowledge with all is the SCN's goal

Best regards.

Marcelo Ramos

Re: RegEx IP validation

marcelo_ramos1 — Tue, 24 Jun 2008 19:53:26 GMT

Hi ,

You can't use this expression on REGEX Toy because the input field allows only 120 characters, and this expression is bigger than this !

Try to test using this code:



REPORT  zregex.

DATA ip TYPE string VALUE '10.10.0.10'.
DATA ip2 TYPE string VALUE '10.10.0.'.
DATA ip3 TYPE string VALUE '999.10.0.10'.

DATA validation TYPE string VALUE '\b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b'.

START-OF-SELECTION.

  PERFORM validateip USING ip.
  PERFORM validateip USING ip2.
  PERFORM validateip USING ip3.

FORM validateip USING ip TYPE string.

  FIND REGEX validation IN ip.

  IF sy-subrc IS NOT INITIAL.
    WRITE:/ 'Ip: ', ip, ' is invalid !'.
  ELSE.
    WRITE:/ 'Ip: ', ip, ' is Valid !'.
  ENDIF.

ENDFORM.                    " validateIP

Greetings,

Marcelo Ramos

Re: RegEx IP validation

former_member194669 — Wed, 25 Jun 2008 11:12:35 GMT

Ramos,

Thankyou. For pointing out the 120 length limit in REGEX TOY. and the useful link you provided.

Now its working.

a®

Re: RegEx IP validation

former_member194669 — Wed, 25 Jun 2008 19:13:34 GMT

And also i can use like the following for IP (no check for alid values (0-255))

/^d{1,3}.d{1,3}.d{1,3}.d{1,3}$/ 999.999.999.999

Thanks

a®