How do I strip characters from a context variable

[Rich.Smith]

So, I'm trying to remove leading and trailing quotes from a context variable, if they exist (they may or may not with my data).

 

So I created a regular expression assertion, set both the source and destination context variable to the same value (since I just want to overwrite it).  I selected the "Match and Replace" option under destination, and then tried a bunch of different regexes in the regular expression, using the TEST tab to show me if it was working as desired.   I've found several that work FINE in the test, but spit out the exact wrong thing when running as part of the policy.

 

So, for example:

 

"ABC, DEF"  should be rewritten to ABC, DEF

'ABC DEF' should similarly be rewritten as ABC DEF

Apostrophes in the middle should be fine, like "ABC's Widgets" should return ABC's Widgets

 

What am I missing?  Why dont these simple regexs work?

 

For example, a regex of:

 

(\")

 

Strips out the quotes in the test tab, but shows ONLY the quotes when run in a policy.

[Joe Dascole]

Hi Richard,

 

I believe this is because the assertion acts against the source, ie: $(request.mainpart}. If you are outputting the variable from the destination this will capture the match as you are seeing. Try to log ${Request.mainpart} after the RegEx

 

Regards,

Joe

[Mark ODonohue]

Hi Richard

I am not sure the (\") , is the right match pattern

.   

The ( ) is the capture group and \" is the will only capture the " characters, the highlighted areas below.

 

So it only matches the two " characters, and not the in between stuff. 

 

Fiddling around I got : 

 

But you probably want something that matches start and end quotes. 

 

The following two do work :  ^\"(.*)\"$    and  ^\"(.+)\"$ 

They match the whole region includign the quotes, but the capture group will be there area between the quotes and not inlcude the quotes.

 

 

 

They can be a bit tricky. 

 

Cheers - Mark

[Stephen Hughes]

Richard,

 

When you are using the Regular Expression assertion, the value that you set in the lower portion of the window for context variable will store an array created based on the Regular Expression used. It is a good idea to create a separate named one to avoid overwriting the original that you may have used. If you simply just looking to overwrite the value then you can left that field blank.

 

 

Sincerely,

 

Stephen Hughes

Broadcom Support

[Mark ODonohue]

Hi Richard

 

I've attached the policy for the sample below.  It may not in that current form be exactly what you want but should be close.  

 

 

 

 

Test cases 

  "boom!"    -> boom!

  'bo'om!'   -> bo'om!

  bo'om!    -> bo'om!

all worked.

 

It will also transform  "bo'om!'  ->  bo'om!  Which you may not want.

 

You can :

1. use "OR" conditon as per :  regex   ^"(.+)"$|^'(.+)'$
   and then you need to deal with result = ${regexPart[1]}${regexPart[2]}
2. Or use two different all must be true branches : 
   one of : 
   all must be true
     match : ^"(.+)"$
     result = ${regexPart[1]}
   all must be true 
      match : ^'(.+)'$
      result = ${regexPart[1]}
   all must be true 
      result =${input} 

 

And attached is cut-and-paste of the policy. 

 

Best of luck. 

 

Cheers - Mark

Attachment(s)

policy.xml.zip   684 B 1 version