mirror of
https://github.com/gyurix1968/guacamole-client.git
synced 2025-09-06 13:17:41 +00:00
GUACAMOLE-641: Allow extensions to add arbitrary sources of Guacamole properties.
This commit is contained in:
Michael Jumper
@@ -19,9 +19,11 @@
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package org.apache.guacamole.environment;
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import org.apache.guacamole.properties.GuacamoleProperties;
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import java.io.File;
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import java.util.Map;
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import org.apache.guacamole.GuacamoleException;
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import org.apache.guacamole.GuacamoleUnsupportedException;
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import org.apache.guacamole.net.auth.GuacamoleProxyConfiguration;
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import org.apache.guacamole.properties.BooleanGuacamoleProperty;
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import org.apache.guacamole.properties.GuacamoleProperty;
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@@ -162,4 +164,24 @@ public interface Environment {
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public GuacamoleProxyConfiguration getDefaultGuacamoleProxyConfiguration()
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throws GuacamoleException;
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/**
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* Adds another possible source of Guacamole configuration properties to
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* this Environment. Properties not already defined by other sources of
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* Guacamole configuration properties will alternatively be read from the
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* given {@link GuacamoleProperties}.
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*
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* @param properties
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* The GuacamoleProperties to add to this Environment.
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*
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* @throws GuacamoleException
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* If the given GuacamoleProperties cannot be added, or if this
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* Environment does not support this operation.
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*/
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public default void addGuacamoleProperties(GuacamoleProperties properties)
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throws GuacamoleException {
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throw new GuacamoleUnsupportedException(String.format("%s does not "
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+ "support dynamic definition of Guacamole properties.",
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getClass()));
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}
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}
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@@ -0,0 +1,85 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.apache.guacamole.properties;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Properties;
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import org.apache.guacamole.GuacamoleException;
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import org.apache.guacamole.GuacamoleServerException;
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/**
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* GuacamoleProperties implementation which reads all properties from a
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* standard Java properties file.
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*/
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public class FileGuacamoleProperties extends PropertiesGuacamoleProperties {
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/**
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* Reads the given Java properties file, storing all property name/value
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* pairs in a new {@link Properties} object.
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*
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* @param propertiesFile
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* The Java properties file to read.
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*
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* @return
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* A new Properties containing all property name/value pairs defined in
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* the given file.
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*
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* @throws GuacamoleException
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* If an error prevents reading the given Java properties file.
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*/
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private static Properties read(File propertiesFile) throws GuacamoleException {
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// Fail early if file simply does not exist
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if (!propertiesFile.exists())
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throw new GuacamoleServerException(String.format("\"%s\" does not "
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+ "exist.", propertiesFile));
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// Load properties from stream, if any, always closing stream when done
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Properties properties = new Properties();
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try (InputStream stream = new FileInputStream(propertiesFile)) {
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properties.load(stream);
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}
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catch (IOException e) {
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throw new GuacamoleServerException(String.format("\"%s\" cannot "
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+ "be read: %s", propertiesFile, e.getMessage()), e);
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}
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return properties;
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}
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/**
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* Creates a new FileGuacamoleProperties which reads all properties from
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* the given standard Java properties file.
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*
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* @param propertiesFile
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* The Java properties file to read.
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*
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* @throws GuacamoleException
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* If an error prevents reading the given Java properties file.
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*/
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public FileGuacamoleProperties(File propertiesFile) throws GuacamoleException {
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super(read(propertiesFile));
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}
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}
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@@ -0,0 +1,49 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.apache.guacamole.properties;
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import java.util.Properties;
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import org.apache.guacamole.GuacamoleException;
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/**
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* An arbitrary set of Guacamole configuration property name/value pairs. This
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* interface is similar in concept to {@link Properties} except that
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* implementations are not required to allow properties to be enumerated or
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* iterated. Properties may simply be retrieved by their names, if known.
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*/
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public interface GuacamoleProperties {
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/**
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* Returns the value of the property having the given name, if defined. If
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* no such property exists, null is returned.
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*
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* @param name
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* The name of the property to retrieve.
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*
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* @return
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* The value of the given property, or null if no such property is
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* defined.
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*
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* @throws GuacamoleException
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* If an error prevents the given property from being read.
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*/
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String getProperty(String name) throws GuacamoleException;
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}
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@@ -0,0 +1,54 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.apache.guacamole.properties;
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import java.util.Properties;
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import org.apache.guacamole.GuacamoleException;
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/**
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* GuacamoleProperties implementation which reads all properties from a
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* {@link Properties} object.
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*/
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public class PropertiesGuacamoleProperties implements GuacamoleProperties {
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/**
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* The Properties from which all property values should be read.
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*/
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private final Properties properties;
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/**
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* Creates a new PropertiesGuacamoleProperties which wraps the given
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* {@link Properties}, providing access to the values of any properties
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* defined therein.
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*
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* @param properties
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* The Properties that should be used as the source of all property
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* values exposed by this instance of PropertiesGuacamoleProperties.
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*/
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public PropertiesGuacamoleProperties(Properties properties) {
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this.properties = properties;
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}
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@Override
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public String getProperty(String name) throws GuacamoleException {
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return properties.getProperty(name);
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}
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}
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@@ -24,15 +24,17 @@ import com.google.inject.Guice;
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import com.google.inject.Injector;
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import com.google.inject.Stage;
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import com.google.inject.servlet.GuiceServletContextListener;
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import java.io.File;
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import java.util.List;
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import java.util.concurrent.atomic.AtomicReference;
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import javax.inject.Inject;
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import javax.servlet.ServletContextEvent;
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import org.apache.guacamole.environment.Environment;
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import org.apache.guacamole.environment.LocalEnvironment;
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import org.apache.guacamole.extension.ExtensionModule;
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import org.apache.guacamole.log.LogModule;
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import org.apache.guacamole.net.auth.AuthenticationProvider;
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import org.apache.guacamole.properties.BooleanGuacamoleProperty;
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import org.apache.guacamole.properties.FileGuacamoleProperties;
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import org.apache.guacamole.rest.RESTServiceModule;
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import org.apache.guacamole.rest.auth.HashTokenSessionMap;
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import org.apache.guacamole.rest.auth.TokenSessionMap;
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@@ -86,6 +88,18 @@ public class GuacamoleServletContextListener extends GuiceServletContextListener
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*/
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private final Logger logger = LoggerFactory.getLogger(GuacamoleServletContextListener.class);
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/**
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* A property that determines whether environment variables are evaluated
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* to override properties specified in guacamole.properties.
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*/
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private static final BooleanGuacamoleProperty ENABLE_ENVIRONMENT_PROPERTIES =
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new BooleanGuacamoleProperty() {
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@Override
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public String getName() {
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return "enable-environment-properties";
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}
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};
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/**
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* The Guacamole server environment.
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*/
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@@ -111,16 +125,34 @@ public class GuacamoleServletContextListener extends GuiceServletContextListener
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@Override
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public void contextInitialized(ServletContextEvent servletContextEvent) {
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environment = new WebApplicationEnvironment();
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// Read configuration information from GUACAMOLE_HOME/guacamole.properties
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try {
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environment = new LocalEnvironment();
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sessionMap = new HashTokenSessionMap(environment);
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environment.addGuacamoleProperties(new FileGuacamoleProperties(
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new File(environment.getGuacamoleHome(), "guacamole.properties")));
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}
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catch (GuacamoleException e) {
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logger.error("Unable to read guacamole.properties: {}", e.getMessage());
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logger.debug("Error reading guacamole.properties.", e);
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throw new RuntimeException(e);
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}
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// For any values not defined in GUACAMOLE_HOME/guacamole.properties,
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// read from system environment if "enable-environment-properties" is
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// set to "true"
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try {
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if (environment.getProperty(ENABLE_ENVIRONMENT_PROPERTIES, false))
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environment.addGuacamoleProperties(new SystemEnvironmentGuacamoleProperties());
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}
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catch (GuacamoleException e) {
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logger.error("Unable to configure support for environment properties: {}", e.getMessage());
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logger.debug("Error reading \"{}\" property from guacamole.properties.", ENABLE_ENVIRONMENT_PROPERTIES.getName(), e);
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}
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// Now that at least the main guacamole.properties source of
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// configuration information is available, initialize the session map
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sessionMap = new HashTokenSessionMap(environment);
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// NOTE: The superclass implementation of contextInitialized() is
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// expected to invoke getInjector(), hence the need to call AFTER
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// setting up the environment and session map
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@@ -0,0 +1,38 @@
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/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
|
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* with the License. You may obtain a copy of the License at
|
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
|
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* software distributed under the License is distributed on an
|
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* "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.
|
||||
*/
|
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package org.apache.guacamole;
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import org.apache.guacamole.properties.GuacamoleProperties;
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import org.apache.guacamole.token.TokenName;
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/**
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* GuacamoleProperties implementation which reads all properties from
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* environment variables. The name of the environment variable corresponding to
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* any particular property is determined using
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* {@link TokenName#canonicalize(java.lang.String)}.
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*/
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public class SystemEnvironmentGuacamoleProperties implements GuacamoleProperties {
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@Override
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public String getProperty(String name) {
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return System.getenv(TokenName.canonicalize(name));
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}
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}
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@@ -0,0 +1,364 @@
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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
|
||||
*
|
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* http://www.apache.org/licenses/LICENSE-2.0
|
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*
|
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* Unless required by applicable law or agreed to in writing,
|
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* software distributed under the License is distributed on an
|
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* "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.
|
||||
*/
|
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|
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package org.apache.guacamole;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FilenameFilter;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.CopyOnWriteArrayList;
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import org.codehaus.jackson.map.ObjectMapper;
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import org.apache.guacamole.environment.Environment;
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import org.apache.guacamole.net.auth.GuacamoleProxyConfiguration;
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import org.apache.guacamole.properties.GuacamoleProperties;
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import org.apache.guacamole.properties.GuacamoleProperty;
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import org.apache.guacamole.protocols.ProtocolInfo;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* The environment of the locally-running instance of the Guacamole web
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* application.
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*/
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public class WebApplicationEnvironment implements Environment {
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/**
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* Logger for this class.
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*/
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private static final Logger logger = LoggerFactory.getLogger(WebApplicationEnvironment.class);
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/**
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* Array of all known protocol names.
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*/
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private static final String[] KNOWN_PROTOCOLS = new String[] {
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"kubernetes",
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"rdp",
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"ssh",
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"telnet",
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"vnc",
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};
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/**
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* The hostname to use when connecting to guacd if no hostname is provided
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* within guacamole.properties.
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*/
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private static final String DEFAULT_GUACD_HOSTNAME = "localhost";
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/**
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* The port to use when connecting to guacd if no port is provided within
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* guacamole.properties.
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*/
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private static final int DEFAULT_GUACD_PORT = 4822;
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|
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/**
|
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* Whether SSL/TLS is enabled for connections to guacd if not specified
|
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* within guacamole.properties.
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*/
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private static final boolean DEFAULT_GUACD_SSL = false;
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|
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/**
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* The location of GUACAMOLE_HOME, which may not truly exist.
|
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*/
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private final File guacHome;
|
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|
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/**
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* The map of all available protocols.
|
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*/
|
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private final Map<String, ProtocolInfo> availableProtocols;
|
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|
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/**
|
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* All GuacamoleProperties instances added via addGuacamoleProperties(), in
|
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* the order that they were added.
|
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*/
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private final List<GuacamoleProperties> availableProperties = new CopyOnWriteArrayList<>();
|
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|
||||
/**
|
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* The Jackson parser for parsing JSON files.
|
||||
*/
|
||||
private static final ObjectMapper mapper = new ObjectMapper();
|
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|
||||
/**
|
||||
* Creates a new Environment, initializing that environment based on the
|
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* location of GUACAMOLE_HOME and the contents of guacamole.properties.
|
||||
*/
|
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public WebApplicationEnvironment() {
|
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|
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// Determine location of GUACAMOLE_HOME
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guacHome = findGuacamoleHome();
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logger.info("GUACAMOLE_HOME is \"{}\".", guacHome.getAbsolutePath());
|
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// Read all protocols
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availableProtocols = readProtocols();
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}
|
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|
||||
/**
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* Locates the Guacamole home directory by checking, in order:
|
||||
* the guacamole.home system property, the GUACAMOLE_HOME environment
|
||||
* variable, and finally the .guacamole directory in the home directory of
|
||||
* the user running the servlet container. If even the .guacamole directory
|
||||
* doesn't exist, then /etc/guacamole will be used.
|
||||
*
|
||||
* @return The File representing the Guacamole home directory, which may
|
||||
* or may not exist, and may turn out to not be a directory.
|
||||
*/
|
||||
private static File findGuacamoleHome() {
|
||||
|
||||
// Attempt to find Guacamole home
|
||||
File guacHome;
|
||||
|
||||
// Use system property by default
|
||||
String desiredDir = System.getProperty("guacamole.home");
|
||||
|
||||
// Failing that, try the GUACAMOLE_HOME environment variable
|
||||
if (desiredDir == null) desiredDir = System.getenv("GUACAMOLE_HOME");
|
||||
|
||||
// If successful, use explicitly specified directory
|
||||
if (desiredDir != null)
|
||||
guacHome = new File(desiredDir);
|
||||
|
||||
// If not explicitly specified, use standard locations
|
||||
else {
|
||||
|
||||
// Try ~/.guacamole first
|
||||
guacHome = new File(System.getProperty("user.home"), ".guacamole");
|
||||
|
||||
// If that doesn't exist, try /etc/guacamole if the /etc directory
|
||||
// exists on this system
|
||||
if (!guacHome.exists() && new File("/etc").exists())
|
||||
guacHome = new File("/etc/guacamole");
|
||||
|
||||
}
|
||||
|
||||
// Return discovered directory
|
||||
return guacHome;
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Parses the given JSON file, returning the parsed ProtocolInfo. The JSON
|
||||
* format is conveniently and intentionally identical to a serialized
|
||||
* ProtocolInfo object, which is identical to the JSON format used by the
|
||||
* protocol REST service built into the Guacamole web application.
|
||||
*
|
||||
* @param input
|
||||
* An input stream containing JSON describing the forms and parameters
|
||||
* associated with a protocol supported by Guacamole.
|
||||
*
|
||||
* @return
|
||||
* A new ProtocolInfo object which contains the forms and parameters
|
||||
* described by the JSON file parsed.
|
||||
*
|
||||
* @throws IOException
|
||||
* If an error occurs while parsing the JSON file.
|
||||
*/
|
||||
private ProtocolInfo readProtocol(InputStream input)
|
||||
throws IOException {
|
||||
return mapper.readValue(input, ProtocolInfo.class);
|
||||
}
|
||||
|
||||
/**
|
||||
* Reads through all pre-defined protocols and any protocols within the
|
||||
* "protocols" subdirectory of GUACAMOLE_HOME, returning a map containing
|
||||
* each of these protocols. The key of each entry will be the name of that
|
||||
* protocol, as would be passed to guacd during connection.
|
||||
*
|
||||
* @return
|
||||
* A map of all available protocols.
|
||||
*/
|
||||
private Map<String, ProtocolInfo> readProtocols() {
|
||||
|
||||
// Map of all available protocols
|
||||
Map<String, ProtocolInfo> protocols = new HashMap<String, ProtocolInfo>();
|
||||
|
||||
// Get protcols directory
|
||||
File protocol_directory = new File(getGuacamoleHome(), "protocols");
|
||||
|
||||
// Read protocols from directory if it exists
|
||||
if (protocol_directory.isDirectory()) {
|
||||
|
||||
// Get all JSON files
|
||||
File[] files = protocol_directory.listFiles(
|
||||
new FilenameFilter() {
|
||||
|
||||
@Override
|
||||
public boolean accept(File file, String string) {
|
||||
return string.endsWith(".json");
|
||||
}
|
||||
|
||||
}
|
||||
);
|
||||
|
||||
// Warn if directory contents are not available
|
||||
if (files == null) {
|
||||
logger.error("Unable to read contents of \"{}\".", protocol_directory.getAbsolutePath());
|
||||
files = new File[0];
|
||||
}
|
||||
|
||||
// Load each protocol from each file
|
||||
for (File file : files) {
|
||||
|
||||
try {
|
||||
|
||||
// Parse protocol
|
||||
FileInputStream stream = new FileInputStream(file);
|
||||
ProtocolInfo protocol = readProtocol(stream);
|
||||
stream.close();
|
||||
|
||||
// Store protocol
|
||||
protocols.put(protocol.getName(), protocol);
|
||||
|
||||
}
|
||||
catch (IOException e) {
|
||||
logger.error("Unable to read connection parameter information from \"{}\": {}", file.getAbsolutePath(), e.getMessage());
|
||||
logger.debug("Error reading protocol JSON.", e);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// If known protocols are not already defined, read from classpath
|
||||
for (String protocol : KNOWN_PROTOCOLS) {
|
||||
|
||||
// If protocol not defined yet, attempt to load from classpath
|
||||
if (!protocols.containsKey(protocol)) {
|
||||
|
||||
InputStream stream = WebApplicationEnvironment.class.getResourceAsStream(
|
||||
"/org/apache/guacamole/protocols/"
|
||||
+ protocol + ".json");
|
||||
|
||||
// Parse JSON if available
|
||||
if (stream != null) {
|
||||
try {
|
||||
protocols.put(protocol, readProtocol(stream));
|
||||
}
|
||||
catch (IOException e) {
|
||||
logger.error("Unable to read pre-defined connection parameter information for protocol \"{}\": {}", protocol, e.getMessage());
|
||||
logger.debug("Error reading pre-defined protocol JSON.", e);
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// Protocols map now fully populated
|
||||
return protocols;
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public File getGuacamoleHome() {
|
||||
return guacHome;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the string value of the property having the given name, trying
|
||||
* each source of properties added with addGuacamoleProperties() until a
|
||||
* value is found. If no such property is defined, null is returned.
|
||||
*
|
||||
* @param name
|
||||
* The name of the property value to retrieve.
|
||||
*
|
||||
* @return
|
||||
* The value of the property having the given name, or null if no such
|
||||
* property is defined.
|
||||
*
|
||||
* @throws GuacamoleException
|
||||
* If an error occurs retrieving a property from a GuacamoleProperties
|
||||
* implementation added via addGuacamoleProperties().
|
||||
*/
|
||||
private String getPropertyValue(String name) throws GuacamoleException {
|
||||
|
||||
// Search all provided GuacamoleProperties implementations, in order
|
||||
for (GuacamoleProperties properties : availableProperties) {
|
||||
String value = properties.getProperty(name);
|
||||
if (value != null)
|
||||
return value;
|
||||
}
|
||||
|
||||
// No such property
|
||||
return null;
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public <Type> Type getProperty(GuacamoleProperty<Type> property) throws GuacamoleException {
|
||||
return property.parseValue(getPropertyValue(property.getName()));
|
||||
}
|
||||
|
||||
@Override
|
||||
public <Type> Type getProperty(GuacamoleProperty<Type> property,
|
||||
Type defaultValue) throws GuacamoleException {
|
||||
|
||||
Type value = getProperty(property);
|
||||
if (value == null)
|
||||
return defaultValue;
|
||||
|
||||
return value;
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public <Type> Type getRequiredProperty(GuacamoleProperty<Type> property)
|
||||
throws GuacamoleException {
|
||||
|
||||
Type value = getProperty(property);
|
||||
if (value == null)
|
||||
throw new GuacamoleServerException("Property " + property.getName() + " is required.");
|
||||
|
||||
return value;
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public Map<String, ProtocolInfo> getProtocols() {
|
||||
return availableProtocols;
|
||||
}
|
||||
|
||||
@Override
|
||||
public ProtocolInfo getProtocol(String name) {
|
||||
return availableProtocols.get(name);
|
||||
}
|
||||
|
||||
@Override
|
||||
public GuacamoleProxyConfiguration getDefaultGuacamoleProxyConfiguration()
|
||||
throws GuacamoleException {
|
||||
|
||||
// Parse guacd hostname/port/ssl properties
|
||||
return new GuacamoleProxyConfiguration(
|
||||
getProperty(Environment.GUACD_HOSTNAME, DEFAULT_GUACD_HOSTNAME),
|
||||
getProperty(Environment.GUACD_PORT, DEFAULT_GUACD_PORT),
|
||||
getProperty(Environment.GUACD_SSL, DEFAULT_GUACD_SSL)
|
||||
);
|
||||
|
||||
}
|
||||
|
||||
@Override
|
||||
public void addGuacamoleProperties(GuacamoleProperties properties) {
|
||||
availableProperties.add(properties);
|
||||
}
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user