org.apache.aurora.scheduler.http.api.security.ShiroIniParser.java Source code

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Here is the source code for org.apache.aurora.scheduler.http.api.security.ShiroIniParser.java

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/**
 * Licensed 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.apache.aurora.scheduler.http.api.security;

import java.util.Set;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableSortedSet;
import com.google.common.collect.Sets;

import org.apache.aurora.common.args.ArgParser;
import org.apache.aurora.common.args.parsers.NonParameterizedTypeParser;
import org.apache.shiro.config.ConfigurationException;
import org.apache.shiro.config.Ini;
import org.apache.shiro.realm.text.IniRealm;

/**
 * Parser for shiro.ini files. Accepts any string that {@link Ini#fromResourcePath(String)} does.
 * The provided ini file may have only the sections required for configuration
 * ({@link IniRealm.ROLES_SECTION_NAME} and {@link IniRealm.USERS_SECTION_NAME}) and no extras -
 * Aurora uses Guice in to configure those sections in {@link HttpSecurityModule}}.
 */
@ArgParser
public class ShiroIniParser extends NonParameterizedTypeParser<Ini> {
    @VisibleForTesting
    static final Set<String> ALLOWED_SECTION_NAMES = ImmutableSortedSet.of(IniRealm.ROLES_SECTION_NAME,
            IniRealm.USERS_SECTION_NAME);

    @VisibleForTesting
    static class ExtraSectionsException extends IllegalArgumentException {
        ExtraSectionsException(Set<String> extraSections) {
            super("Extra sections present: " + extraSections);
        }
    }

    @VisibleForTesting
    static class MissingSectionsException extends IllegalArgumentException {
        MissingSectionsException() {
            super("No sections present. Allowed sections are: " + Joiner.on(",").join(ALLOWED_SECTION_NAMES));
        }
    }

    @VisibleForTesting
    static class ShiroConfigurationException extends IllegalArgumentException {
        ShiroConfigurationException(ConfigurationException e) {
            super(e);
        }
    }

    @Override
    public Ini doParse(String raw) throws IllegalArgumentException {
        Ini ini;
        try {
            ini = Ini.fromResourcePath(raw);
        } catch (ConfigurationException e) {
            throw new ShiroConfigurationException(e);
        }

        Set<String> presentSections = ImmutableSortedSet.copyOf(ini.getSectionNames());
        if (presentSections.isEmpty()) {
            throw new MissingSectionsException();
        }

        Set<String> extraSections = Sets.difference(presentSections, ALLOWED_SECTION_NAMES);
        if (!extraSections.isEmpty()) {
            throw new ExtraSectionsException(extraSections);
        }

        return ini;
    }
}