GUACAMOLE-374: Support absolutely all properties and extensions.

guacamole-docker/environment/REMOTE_IP_VALVE_/configure.sh

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+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+##
+## @fn REMOTE_IP_VALVE_/configure.sh
+##
+## Configures Tomcat to forward the IP addresses of clients behind a proxy if
+## the REMOTE_IP_VALVE_ENABLED environment variable is set to "true".
+##
+
+# Add <Valve> element
+xmlstarlet edit --inplace \
+    --insert '/Server/Service/Engine/Host/*' --type elem -n Valve \
+    --insert '/Server/Service/Engine/Host/Valve[not(@className)]' --type attr -n className -v org.apache.catalina.valves.RemoteIpValve \
+    $CATALINA_BASE/conf/server.xml
+
+# Allowed IPs
+if [ -z "$PROXY_ALLOWED_IPS_REGEX" ]; then
+    echo "Using default Tomcat allowed IPs regex"
+else
+    xmlstarlet edit --inplace \
+        --insert '/Server/Service/Engine/Host/Valve[@className="org.apache.catalina.valves.RemoteIpValve"]' \
+        --type attr -n internalProxies -v "$PROXY_ALLOWED_IPS_REGEX" \
+        $CATALINA_BASE/conf/server.xml
+fi
+
+# X-Forwarded-For
+if [ -z "$PROXY_IP_HEADER" ]; then
+    echo "Using default Tomcat proxy IP header"
+else
+    xmlstarlet edit --inplace \
+        --insert "/Server/Service/Engine/Host/Valve[@className='org.apache.catalina.valves.RemoteIpValve']" \
+        --type attr -n remoteIpHeader -v "$PROXY_IP_HEADER" \
+        $CATALINA_BASE/conf/server.xml
+fi
+
+# X-Forwarded-Proto
+if [ -z "$PROXY_PROTOCOL_HEADER" ]; then
+    echo "Using default Tomcat proxy protocol header"
+else
+    xmlstarlet edit --inplace \
+        --insert "/Server/Service/Engine/Host/Valve[@className='org.apache.catalina.valves.RemoteIpValve']" \
+        --type attr -n protocolHeader -v "$PROXY_PROTOCOL_HEADER" \
+        $CATALINA_BASE/conf/server.xml
+fi
+
+# X-Forwarded-By
+if [ -z "$PROXY_BY_HEADER" ]; then
+    echo "Using default Tomcat proxy forwarded by header"
+else
+    xmlstarlet edit --inplace \
+        --insert "/Server/Service/Engine/Host/Valve[@className='org.apache.catalina.valves.RemoteIpValve']" \
+        --type attr -n remoteIpProxiesHeader -v "$PROXY_BY_HEADER" \
+        $CATALINA_BASE/conf/server.xml
+fi
+