72 lines
2.5 KiB
Java
72 lines
2.5 KiB
Java
/*
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* mxisd - Matrix Identity Server Daemon
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* Copyright (C) 2017 Kamax Sarl
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*
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* https://www.kamax.io/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package io.kamax.mxisd.dns;
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import io.kamax.mxisd.config.DnsOverwriteConfig;
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import io.kamax.mxisd.exception.ConfigurationException;
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import io.kamax.mxisd.exception.InternalServerError;
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import org.apache.http.client.utils.URIBuilder;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.net.MalformedURLException;
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import java.net.URI;
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import java.net.URL;
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import java.util.HashMap;
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import java.util.Map;
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import static io.kamax.mxisd.config.DnsOverwriteConfig.Entry;
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public class ClientDnsOverwrite {
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private transient final Logger log = LoggerFactory.getLogger(ClientDnsOverwrite.class);
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private Map<String, Entry> mappings;
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public ClientDnsOverwrite(DnsOverwriteConfig cfg) {
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mappings = new HashMap<>();
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cfg.getHomeserver().getClient().forEach(e -> mappings.put(e.getName(), e));
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}
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public URIBuilder transform(URI initial) {
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URIBuilder builder = new URIBuilder(initial);
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Entry mapping = mappings.get(initial.getHost());
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if (mapping == null) {
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throw new InternalServerError("No DNS client override for " + initial.getHost());
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}
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try {
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URL target = new URL(mapping.getValue());
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builder.setScheme(target.getProtocol());
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builder.setHost(target.getHost());
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if (target.getPort() != -1) {
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builder.setPort(target.getPort());
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}
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return builder;
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} catch (MalformedURLException e) {
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log.warn("Skipping DNS overwrite entry {} due to invalid value [{}]: {}", mapping.getName(), mapping.getValue(), e.getMessage());
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throw new ConfigurationException("Invalid DNS overwrite entry in homeserver client: " + mapping.getName(), e.getMessage());
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}
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}
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}
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