trim a string value | using assign message | message template

[dpatty]

Hi  ,

I have to trim a string not using JS . is there a way to do that using ootb policy 

Regards,

Patty

[apickelsimer]

You're looking for the `substring` function that is available as a Message Template. See https://cloud.google.com/apigee/docs/api-platform/reference/message-template-intro#substring-functio...

Here is a sample to get you started:

<AssignMessage name="AM-Substring">
  <IgnoreUnresolvedVariables>true</IgnoreUnresolvedVariables>
  <AssignVariable>
    <Name>originalString</Name>
    <Value>ABCDEFGHIJKLMNOPQRSTUVWXYZ</Value>
  </AssignVariable>
  <AssignVariable>
    <Name>start_index</Name>
    <Value>0</Value>
  </AssignVariable>
  <AssignVariable>
    <Name>end_index</Name>
    <Value>3</Value>
  </AssignVariable>
  <AssignVariable>
    <Name>trimmedString</Name>
    <Template>{substring(originalString,start_index,end_index)}</Template>
  </AssignVariable>
  <AssignVariable>
    <Name>literalString</Name>
    <Template>{substring(ABCDEFGHIJKLMNOPQRSTUVWXYZ,0,3)}</Template>
  </AssignVariable>
</AssignMessage>

[dpatty]

Hi , 

Actually needs to remove leading and trailing space character from a string .

Ex -  originalString = "   ABCGDFLFLFF    "

         trimmedString = ABCGDFLFLFF

Best Regards,

Patty

[dknezic · Accepted solution]

MessageTemplates also have a replaceAll function that you could use