From f53fe344579287603a122d5d6cc60c13ecdeef01 Mon Sep 17 00:00:00 2001
From: Ian Young <ian@iay.org.uk>
Date: Sat, 9 Apr 2011 10:27:50 +0000
Subject: [PATCH] Add a common XSLT transform for cleaning imported metadata
 from other metadata sources.

---
 feds/clean_import.xsl   | 48 +++++++++++++++++++++++++++++++++++++++++
 feds/common_beans.xml   | 16 ++++++++++++++
 feds/edugain/import.xml |  1 +
 feds/edugate/import.xml |  1 +
 4 files changed, 66 insertions(+)
 create mode 100644 feds/clean_import.xsl

diff --git a/feds/clean_import.xsl b/feds/clean_import.xsl
new file mode 100644
index 00000000..bdb7edf1
--- /dev/null
+++ b/feds/clean_import.xsl
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+	
+	clean_import.xsl
+	
+	Clean up imported metadata from a metadata exchange channel.
+	
+-->
+<xsl:stylesheet version="1.0"
+	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+	xmlns:ds="http://www.w3.org/2000/09/xmldsig#"
+	xmlns:elab="http://eduserv.org.uk/labels"
+	xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata"
+	xmlns:wayf="http://sdss.ac.uk/2006/06/WAYF"
+	xmlns:ukfedlabel="http://ukfederation.org.uk/2006/11/label"
+	
+	xmlns="urn:oasis:names:tc:SAML:2.0:metadata"
+	exclude-result-prefixes="elab ukfedlabel wayf">
+
+	<!--Force UTF-8 encoding for the output.-->
+	<xsl:output omit-xml-declaration="no" method="xml" encoding="UTF-8" indent="yes"/>
+
+	<!-- strip everything from certain namespaces -->
+	<xsl:template match="elab:*"/>
+	<xsl:template match="ukfedlabel:*"/>
+	<xsl:template match="wayf:*"/>
+	
+	<!-- strip redundant attributes from EntityDescriptor elements -->
+	<xsl:template match="md:EntityDescriptor/@ID"/>
+	<xsl:template match="md:EntityDescriptor/@cacheDuration"/>
+	<xsl:template match="md:EntityDescriptor/@validUntil"/>
+	
+	<!-- strip xml:base entirely -->
+	<xsl:template match="@xml:base"/>
+	
+	<!--By default, copy text blocks, comments and attributes unchanged.-->
+	<xsl:template match="text()|comment()|@*">
+		<xsl:copy/>
+	</xsl:template>
+	
+	<!--By default, copy all elements from the input to the output, along with their attributes and contents.-->
+	<xsl:template match="*">
+		<xsl:copy>
+			<xsl:apply-templates select="node()|@*"/>
+		</xsl:copy>
+	</xsl:template>
+	
+</xsl:stylesheet>
diff --git a/feds/common_beans.xml b/feds/common_beans.xml
index 586c2f9a..11bba625 100644
--- a/feds/common_beans.xml
+++ b/feds/common_beans.xml
@@ -112,6 +112,22 @@
         </property>
     </bean>
     
+    <!--
+        cleanImport
+        
+        A pipeline stage that can be used in an import pipeline to clean up the metadata
+        presented, for example by removing redundant attributes or elements which only have
+        meaning when added by the UK federation registrar.
+    -->
+    <bean id="cleanImport" class="net.shibboleth.metadata.dom.stage.XSLTStage">
+        <property name="id" value="cleanImport"/>
+        <property name="xslResource">
+            <bean class="org.opensaml.util.resource.FilesystemResource">
+                <constructor-arg value="#{ systemProperties['basedir'] }/feds/clean_import.xsl"/>
+            </bean>
+        </property>
+    </bean>
+    
     <!--
         <bean id="members" class="uk.org.ukfederation.members.Members">
             <constructor-arg>
diff --git a/feds/edugain/import.xml b/feds/edugain/import.xml
index 82a09412..a62e6217 100644
--- a/feds/edugain/import.xml
+++ b/feds/edugain/import.xml
@@ -53,6 +53,7 @@
             <list>
                 <ref bean="fetchEduGainExportAggregate"/>
                 <ref bean="checkEdugainSignature"/>
+                <ref bean="cleanImport"/>
                 <ref bean="disassemble"/>
                 <ref bean="checkSchemas"/>
                 <ref bean="assemble"/>
diff --git a/feds/edugate/import.xml b/feds/edugate/import.xml
index 219591d8..49c653cd 100644
--- a/feds/edugate/import.xml
+++ b/feds/edugate/import.xml
@@ -53,6 +53,7 @@
             <list>
                 <ref bean="fetchEdugateExportAggregate"/>
                 <ref bean="checkEdugateSignature"/>
+                <ref bean="cleanImport"/>
                 <ref bean="disassemble"/>
                 <ref bean="checkSchemas"/>
                 <ref bean="assemble"/>