[Preview]modify ajp-listener to allow specifying pattern for ajp request attributes

Overview

Since UNDERTOW-1667 one can set additional AJP request attribute parsing permission via env variable. However there is no way to set it in WFLY config/model. This RFE’s goal is to make it possible.

Issue Metadata

Issue

WFLY-15452

Stability Level

Experimental
[X] Preview
Community
default

Dev Contacts

Bartosz Baranowski

QE Contacts

Martin Svehla

Testing By

Engineering
[X] QE

Affected Projects or Components

undertow

Other Interested Projects

Relevant Installation Types

Traditional standalone server (unzipped or provisioned by Galleon)
Managed domain
OpenShift s2i
Bootable jar

Requirements

Hard Requirements

Being able to configure pattern via model/xml.

<subsystem xmlns="urn:jboss:domain:undertow:14.0" default-server="some-server" default-servlet-container="myContainer" default-virtual-host="default-virtual-host" instance-id="some-id" statistics-enabled="true">
   ...
   <server default-host="other-host" name="some-server" servlet-container="myContainer">
      ...
      <ajp-listener ...  allowed_request_attr_pattern="(?:apple|banana)"  .../>
      ...
   </server>
   ...
</subsystem>

Parameters will be present in undertow server element(for standalone: /subsystem=undertow/server=default-server/ajp-listener=myListener): * allowed_request_attr_pattern Default: null Type: String(regex - java.util.regex.Pattern)

Nice-to-Have Requirements

Non-Requirements

Backwards Compatibility

Possibly. Subsystem transformers should be able to handle it.

Default Configuration

No change.

Importing Existing Configuration

No steps should suffice, as it would mean defaulting to 'null', which is default value in undertow source.

Deployments

Not affected.

Interoperability