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Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.common.settings;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.elasticsearch.cli.ExitCodes;
import org.elasticsearch.cli.Terminal;
import org.elasticsearch.cli.UserException;
import org.elasticsearch.common.CheckedFunction;
import org.elasticsearch.env.Environment;
import java.io.BufferedReader;
import java.io.CharArrayWriter;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.List;
/**
* A subcommand for the keystore cli which adds a string setting.
*/
class AddStringKeyStoreCommand extends BaseKeyStoreCommand {
private final OptionSpec stdinOption;
private final OptionSpec arguments;
AddStringKeyStoreCommand() {
super("Add a string settings to the keystore", false);
this.stdinOption = parser.acceptsAll(Arrays.asList("x", "stdin"), "Read setting values from stdin");
this.forceOption = parser.acceptsAll(Arrays.asList("f", "force"),
"Overwrite existing setting without prompting, creating keystore if necessary");
this.arguments = parser.nonOptions("setting names");
}
// pkg private so tests can manipulate
InputStream getStdin() {
return System.in;
}
@Override
protected void executeCommand(Terminal terminal, OptionSet options, Environment env) throws Exception {
final List settings = arguments.values(options);
if (settings.isEmpty()) {
throw new UserException(ExitCodes.USAGE, "the setting names can not be empty");
}
final KeyStoreWrapper keyStore = getKeyStore();
final Closeable closeable;
final CheckedFunction valueSupplier;
if (options.has(stdinOption)) {
final BufferedReader stdinReader = new BufferedReader(new InputStreamReader(getStdin(), StandardCharsets.UTF_8));
valueSupplier = s -> {
try (CharArrayWriter writer = new CharArrayWriter()) {
int c;
while ((c = stdinReader.read()) != -1) {
if ((char) c == '\r' || (char) c == '\n') {
break;
}
writer.write((char) c);
}
return writer.toCharArray();
}
};
closeable = stdinReader;
} else {
valueSupplier = s -> terminal.readSecret("Enter value for " + s + ": ");
closeable = () -> {};
}
try (Closeable ignored = closeable) {
for (final String setting : settings) {
if (keyStore.getSettingNames().contains(setting) && options.has(forceOption) == false) {
if (terminal.promptYesNo("Setting " + setting + " already exists. Overwrite?", false) == false) {
terminal.println("Exiting without modifying keystore.");
return;
}
}
try {
keyStore.setString(setting, valueSupplier.apply(setting));
} catch (final IllegalArgumentException e) {
throw new UserException(ExitCodes.DATA_ERROR, e.getMessage());
}
}
}
keyStore.save(env.configFile(), getKeyStorePassword().getChars());
}
}