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261 lines
8.9 KiB
261 lines
8.9 KiB
8 years ago
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/*
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This file is part of Libresonic.
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Libresonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Libresonic 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Libresonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Libresonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.libresonic.player.service;
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import org.apache.commons.io.IOUtils;
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import org.apache.http.client.ResponseHandler;
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import org.apache.http.client.config.RequestConfig;
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import org.apache.http.client.methods.HttpGet;
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import org.apache.http.impl.client.BasicResponseHandler;
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import org.apache.http.impl.client.CloseableHttpClient;
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import org.apache.http.impl.client.HttpClients;
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import org.libresonic.player.domain.Version;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.*;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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/**
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* Provides version-related services, including functionality for determining whether a newer
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* version of Libresonic is available.
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*
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* @author Sindre Mehus
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*/
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public class VersionService {
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private static final DateFormat DATE_FORMAT = new SimpleDateFormat("yyyyMMdd");
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private static final Logger LOG = LoggerFactory.getLogger(VersionService.class);
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private Version localVersion;
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private Version latestFinalVersion;
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private Version latestBetaVersion;
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private Date localBuildDate;
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private String localBuildNumber;
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/**
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* Time when latest version was fetched (in milliseconds).
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*/
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private long lastVersionFetched;
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/**
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* Only fetch last version this often (in milliseconds.).
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*/
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private static final long LAST_VERSION_FETCH_INTERVAL = 7L * 24L * 3600L * 1000L; // One week
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/**
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* URL from which to fetch latest versions.
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*/
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private static final String VERSION_URL = "http://libresonic.org/release/version.txt";
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/**
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* Returns the version number for the locally installed Libresonic version.
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*
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* @return The version number for the locally installed Libresonic version.
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*/
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public synchronized Version getLocalVersion() {
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if (localVersion == null) {
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try {
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localVersion = new Version(readLineFromResource("/version.txt"));
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LOG.info("Resolved local Libresonic version to: " + localVersion);
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} catch (Exception x) {
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LOG.warn("Failed to resolve local Libresonic version.", x);
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}
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}
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return localVersion;
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}
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/**
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* Returns the version number for the latest available Libresonic final version.
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*
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* @return The version number for the latest available Libresonic final version, or <code>null</code>
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* if the version number can't be resolved.
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*/
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public synchronized Version getLatestFinalVersion() {
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refreshLatestVersion();
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return latestFinalVersion;
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}
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/**
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* Returns the version number for the latest available Libresonic beta version.
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*
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* @return The version number for the latest available Libresonic beta version, or <code>null</code>
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* if the version number can't be resolved.
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*/
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public synchronized Version getLatestBetaVersion() {
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refreshLatestVersion();
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return latestBetaVersion;
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}
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/**
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* Returns the build date for the locally installed Libresonic version.
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*
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* @return The build date for the locally installed Libresonic version, or <code>null</code>
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* if the build date can't be resolved.
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*/
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public synchronized Date getLocalBuildDate() {
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if (localBuildDate == null) {
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try {
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String date = readLineFromResource("/build_date.txt");
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localBuildDate = DATE_FORMAT.parse(date);
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} catch (Exception x) {
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LOG.warn("Failed to resolve local Libresonic build date.", x);
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}
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}
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return localBuildDate;
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}
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/**
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* Returns the build number for the locally installed Libresonic version.
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*
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* @return The build number for the locally installed Libresonic version, or <code>null</code>
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* if the build number can't be resolved.
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*/
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public synchronized String getLocalBuildNumber() {
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if (localBuildNumber == null) {
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try {
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localBuildNumber = readLineFromResource("/build_number.txt");
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} catch (Exception x) {
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LOG.warn("Failed to resolve local Libresonic build number.", x);
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}
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}
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return localBuildNumber;
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}
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/**
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* Returns whether a new final version of Libresonic is available.
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*
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* @return Whether a new final version of Libresonic is available.
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*/
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public boolean isNewFinalVersionAvailable() {
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Version latest = getLatestFinalVersion();
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Version local = getLocalVersion();
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if (latest == null || local == null) {
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return false;
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}
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return local.compareTo(latest) < 0;
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}
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/**
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* Returns whether a new beta version of Libresonic is available.
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*
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* @return Whether a new beta version of Libresonic is available.
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*/
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public boolean isNewBetaVersionAvailable() {
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Version latest = getLatestBetaVersion();
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Version local = getLocalVersion();
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if (latest == null || local == null) {
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return false;
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}
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return local.compareTo(latest) < 0;
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}
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/**
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* Reads the first line from the resource with the given name.
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*
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* @param resourceName The resource name.
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* @return The first line of the resource.
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*/
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private String readLineFromResource(String resourceName) {
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InputStream in = VersionService.class.getResourceAsStream(resourceName);
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if (in == null) {
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return null;
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}
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BufferedReader reader = null;
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try {
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reader = new BufferedReader(new InputStreamReader(in));
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return reader.readLine();
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} catch (IOException x) {
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return null;
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} finally {
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IOUtils.closeQuietly(reader);
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IOUtils.closeQuietly(in);
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}
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}
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/**
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* Refreshes the latest final and beta versions.
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*/
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private void refreshLatestVersion() {
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long now = System.currentTimeMillis();
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boolean isOutdated = now - lastVersionFetched > LAST_VERSION_FETCH_INTERVAL;
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if (isOutdated) {
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try {
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lastVersionFetched = now;
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readLatestVersion();
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} catch (Exception x) {
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LOG.warn("Failed to resolve latest Libresonic version.", x);
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}
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}
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}
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/**
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* Resolves the latest available Libresonic version by screen-scraping a web page.
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*
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* @throws IOException If an I/O error occurs.
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*/
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private void readLatestVersion() throws IOException {
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RequestConfig requestConfig = RequestConfig.custom()
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.setConnectTimeout(10000)
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.setSocketTimeout(10000)
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.build();
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HttpGet method = new HttpGet(VERSION_URL + "?v=" + getLocalVersion());
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method.setConfig(requestConfig);
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String content;
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try (CloseableHttpClient client = HttpClients.createDefault()) {
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ResponseHandler<String> responseHandler = new BasicResponseHandler();
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content = client.execute(method, responseHandler);
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}
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Pattern finalPattern = Pattern.compile("LIBRESONIC_FULL_VERSION_BEGIN(.*)LIBRESONIC_FULL_VERSION_END");
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Pattern betaPattern = Pattern.compile("LIBRESONIC_BETA_VERSION_BEGIN(.*)LIBRESONIC_BETA_VERSION_END");
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try (BufferedReader reader = new BufferedReader(new StringReader(content))) {
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String line = reader.readLine();
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while (line != null) {
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Matcher finalMatcher = finalPattern.matcher(line);
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if (finalMatcher.find()) {
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latestFinalVersion = new Version(finalMatcher.group(1));
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LOG.info("Resolved latest Libresonic final version to: " + latestFinalVersion);
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}
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Matcher betaMatcher = betaPattern.matcher(line);
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if (betaMatcher.find()) {
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latestBetaVersion = new Version(betaMatcher.group(1));
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LOG.info("Resolved latest Libresonic beta version to: " + latestBetaVersion);
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}
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line = reader.readLine();
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}
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}
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}
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}
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