Support Article
Screen flow previous button not responding in obfuscated IAC
SA-654
Summary
IAC gadget is included in a page which triggers a screen flow. The screen flow previous button brings user to the previous screen in PRPC but in IAC gadget it does not respond. This only happens when obfuscation is enabled.
Error Messages
Not Applicable
Steps to Reproduce
Setup IAC
Enable obfuscation on both IAC and PRPC (see more info below)
Setup a screen flow
Access creating new work object with a flow that has screen flow
Click on previous button
Quick steps to enable obfuscation
1) Add the following lines into prconfig.xml in PRPC.
<env name="initialization/nodetype" value="webtesting"/>
<env name="initialization/urlencryption" value="true"/>
2) In IAC gadget, set pega.web.config.encrypt=true; (the default is false)
For more information see https://pdn.pega.com/internet-application-composer/deploying-iac-v31-for-web-access
Root Cause
The root cause of this problem is a defect in Pegasystems’ code/rules. That the previous button calls for pega.u.d.submit to pass URL parameters. The URL parameters are obfuscated, but the '\' at the end of the URL parameter is obfuscated as well.
Resolution
A local change was given to the customer (see below), however a dev tip has been created BUG-167063 and targeted for Pega 7.1.7.
1) Create a custom function in UserWorkForm
function Custom_goToPreviousTask(activity, prevAssn) {
var activity = "pyActivity="+activity+"&previousAssignment="+prevAssn;
pega.u.d.submit(activity);
}
2) In the previous button's configuration, go to the actions tab. Change the onClick event's action to have that custom function, passing the activity and previous assignment as parameters.
For example the default value as shown in TabbedScreenFlow7 harness:
onClick Event's Action: Run Script
Function Name: script:pega.u.d.submit
Parameter Name: <empty>
Parameter Value: "pyActivity=GoToPreviousTask&previousAssignment=true"
Change to the following:
onClick Event's Action: Run Script
Function Name: Custom_goToPreviousTask
Parameter Name: pyActivity
Parameter Value: "GoToPreviousTask"
Parameter Name: previousAssignment
Parameter Value: "true"
Published March 29, 2016 - Updated October 8, 2020
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