65 lines
2.3 KiB
Java
65 lines
2.3 KiB
Java
/*
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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;
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import com.google.common.io.Files;
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import java.io.File;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import org.apache.guacamole.properties.GuacamoleProperties;
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import org.apache.guacamole.token.TokenName;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* GuacamoleProperties implementation which reads all properties from files
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* whose filenames are stored in environment variables. The name of the
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* environment variable corresponding to the filename is determined from the
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* original property using {@link TokenName#canonicalize(java.lang.String)}
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* with an additional "_FILE" suffix.
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*/
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public class SystemFileEnvironmentGuacamoleProperties implements GuacamoleProperties {
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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(SystemFileEnvironmentGuacamoleProperties.class);
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@Override
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public String getProperty(String name) {
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String filename = System.getenv(TokenName.canonicalize(name) + "_FILE");
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if (filename != null) {
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try {
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return Files.asCharSource(new File(filename), StandardCharsets.UTF_8).read();
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}
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catch (IOException e) {
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logger.error("Property \"{}\" could not be read from file \"{}\": {}", name, filename, e.getMessage());
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logger.debug("Error reading property value from file.", e);
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}
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}
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return null;
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}
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}
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