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/*
* Copyright (C) 2008-2020, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package ru.sape;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.juick.www.ad.models.Site;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.*;
public class SapeConnection {
private static final Logger logger = LoggerFactory.getLogger(SapeConnection.class);
private final String version = "1.0.3";
private final List<String> serverList = Arrays.asList("dispenser-01.sape.ru", "dispenser-02.sape.ru");
private final String dispenserPath;
private final String userAgent;
private final int socketTimeout;
private final int cacheLifeTime;
public SapeConnection(String dispenserPath, String userAgent, int socketTimeout, int cacheLifeTime) {
this.dispenserPath = dispenserPath;
this.userAgent = userAgent;
this.socketTimeout = socketTimeout;
this.cacheLifeTime = cacheLifeTime;
}
protected String fetchRemoteFile(String host, String path) throws IOException {
Reader r = null;
try {
HttpURLConnection connection = (HttpURLConnection) ((new URL(("http://" + host + path)).openConnection()));
if (socketTimeout > 0) {
connection.setConnectTimeout(socketTimeout);
connection.setReadTimeout(socketTimeout);
}
connection.addRequestProperty("User-Agent", userAgent + ' ' + version);
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setRequestMethod("GET");
connection.connect();
r = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8));
StringWriter sw = new StringWriter();
int b;
while ((b = r.read()) != -1) {
sw.write(b);
}
return sw.toString();
} finally {
if (r != null) {
r.close();
}
}
}
Site cachedSite;
long cacheUpdated;
public Optional<Site> getData() {
if (cacheLifeTime <= (System.currentTimeMillis() - cacheUpdated) / 1000) {
for (String server : serverList) {
String data;
try {
data = fetchRemoteFile(server, dispenserPath + "&charset=UTF-8&as_xml=true");
} catch (IOException e1) {
continue;
}
if (data.startsWith("FATAL ERROR:")) {
logger.error("Sape responded with error: {}", data);
continue;
}
try {
cachedSite = Site.fromXMLData(data);
} catch (Exception e) {
logger.error("Can't parse Sape data", e);
continue;
}
cacheUpdated = System.currentTimeMillis();
return Optional.of(cachedSite);
}
logger.error("Unable to fetch Sape data");
return Optional.empty();
}
return Optional.of(cachedSite);
}
}
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