Cross-Origin Embedder Policy Interceptor

Description

Interceptor that implements Cross-Origin Embedder Policy on incoming requests.

COEP prevents the document from loading any framed documents which don’t opt-in by setting the COEP header:

Cross-Origin-Embedder-Policy: require-corp

This provides protection for documents that don’t restrict framing. A document that doesn’t set COEP cannot be framed by another document with COEP. All descendents of a document with COEP will also enforce the same restrictions.

COEP is now supported by all major browsers. More information about COEP.

Parameters

• exemptedPaths - Set of opt out endpoints that are meant to serve cross-site traffic. Paths should contain leading slashes and must be relative. This field is empty by default.
• enforcingMode - Boolean variable allowing the user to let COEP operate in enforcing, which blocks both resource and reports violations, or report-only mode, which only reports violations. Default value for field is false.
• disabled - Boolean variable disabling and enabling COEP. Default value for field is false.

Examples

<action  name="someAction" class="com.examples.SomeAction">
    <interceptor-ref name="defaultStack">
        <param name="coep.exemptedPaths">/path1,/path2,/path3</param>
        <param name="coep.enforcingMode">false</param>
        <param name="coep.disabled">false</param>
    </interceptor-ref>
    <result name="success">good_result.ftl</result>
</action>