mirror of
https://github.com/yacy/yacy_search_server.git
synced 2024-09-21 00:00:13 +02:00
871ee1ce0f
automatically aquire release information from download archives web pages from latest.yacy-forum.net and yacy.net are retrieved, parsed, links wihin are analysed, sorted and the most recent developer and main releases are provided as direct download link on the status page, if it was discovered that a more recent version than the current version is available. This process is done only once during run-time of a peer, to protect our download archives from DoS by YaCy peers. git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@3606 6c8d7289-2bf4-0310-a012-ef5d649a1542
214 lines
8.6 KiB
Java
214 lines
8.6 KiB
Java
// yacyVersion.java
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// ----------------
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// (C) 2007 by Michael Peter Christen; mc@anomic.de, Frankfurt a. M., Germany
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// first published 27.04.2007 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// LICENSE
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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 General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (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 General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package de.anomic.yacy;
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import java.io.IOException;
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import java.net.MalformedURLException;
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import java.util.Comparator;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.TreeSet;
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import de.anomic.htmlFilter.htmlFilterContentScraper;
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import de.anomic.net.URL;
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public final class yacyVersion implements Comparator, Comparable {
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// general release info
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public static final float YACY_SUPPORTS_PORT_FORWARDING = (float) 0.383;
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public static final float YACY_SUPPORTS_GZIP_POST_REQUESTS = (float) 0.40300772;
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public static final float YACY_ACCEPTS_RANKING_TRANSMISSION = (float) 0.414;
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public static final float YACY_HANDLES_COLLECTION_INDEX = (float) 0.486;
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public static final float YACY_PROVIDES_CRAWLS_VIA_LIST_HTML = (float) 0.50403367;
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// information about latest release, retrieved by other peers release version
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public static double latestRelease = 0.1; // this value is overwritten when a peer with later version appears
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// information about latest release, retrieved from download pages
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public static yacyVersion latestDevRelease = null;
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public static yacyVersion latestMainRelease = null;
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// class variables
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public float releaseNr;
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public String dateStamp;
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public int svn;
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public boolean mainRelease;
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public URL url;
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public yacyVersion(URL url) {
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this(url.getFileName());
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this.url = url;
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}
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public yacyVersion(String release) {
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// parse a release file name
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// the have the following form:
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// yacy_dev_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
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// yacy_v${releaseVersion}_${DSTAMP}_${releaseNr}.tar.gz
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// i.e. yacy_v0.51_20070321_3501.tar.gz
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this.url = null;
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if ((release == null) || (!release.endsWith(".tar.gz"))) {
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throw new RuntimeException("release file name '" + release + "' is not valid, no tar.gz");
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}
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// cut off tail
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release = release.substring(0, release.length() - 7);
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if (release.startsWith("yacy_dev_v")) {
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mainRelease = false;
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release = release.substring(10);
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} else if (release.startsWith("yacy_v")) {
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mainRelease = true;
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release = release.substring(6);
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} else {
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throw new RuntimeException("release file name '" + release + "' is not valid, wrong prefix");
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}
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// now all release names have the form
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// ${releaseVersion}_${DSTAMP}_${releaseNr}
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String[] comp = release.split("_"); // should be 3 parts
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if (comp.length != 3) {
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throw new RuntimeException("release file name '" + release + "' is not valid, 3 information parts expected");
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}
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try {
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this.releaseNr = Float.parseFloat(comp[0]);
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} catch (NumberFormatException e) {
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throw new RuntimeException("release file name '" + release + "' is not valid, '" + comp[0] + "' should be a float number");
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}
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this.dateStamp = comp[1];
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if (this.dateStamp.length() != 8) {
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throw new RuntimeException("release file name '" + release + "' is not valid, '" + comp[1] + "' should be a 8-digit date string");
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}
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try {
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this.svn = Integer.parseInt(comp[2]);
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} catch (NumberFormatException e) {
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throw new RuntimeException("release file name '" + release + "' is not valid, '" + comp[2] + "' should be a integer number");
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}
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// finished! we parsed a relase string
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}
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/*
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public yacyVersion(URL url, float releaseNr, String dateStamp, int svn, boolean mainRelease) {
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this.url = url;
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this.releaseNr = releaseNr;
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this.dateStamp = dateStamp;
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this.svn = svn;
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this.mainRelease = mainRelease;
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}
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*/
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public int compareTo(Object obj) {
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yacyVersion v = (yacyVersion) obj;
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return compare(this, v);
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}
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public int compare(Object arg0, Object arg1) {
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// compare-operator for two yacyVersion objects
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// must be implemented to make it possible to put this object into
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// a ordered structure, like TreeSet or TreeMap
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yacyVersion a0 = (yacyVersion) arg0, a1 = (yacyVersion) arg1;
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return (new Integer(a0.svn)).compareTo(new Integer(a1.svn));
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}
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public boolean equals(Object obj) {
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yacyVersion v = (yacyVersion) obj;
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return (this.svn == v.svn) && (this.url.toNormalform().equals(v.url.toNormalform()));
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}
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public int hashCode() {
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return this.url.toNormalform().hashCode();
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}
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public String toAnchor() {
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// generates an anchor string that can be used to embed in an html for direct download
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return "<a href=" + this.url.toNormalform() + ">YaCy " + ((this.mainRelease) ? "main release" : "developer release") + " v" + this.releaseNr + ", SVN " + this.svn + "</a>";
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}
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public static void aquireLatestReleaseInfo() {
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if ((latestDevRelease == null) && (latestMainRelease == null)) {
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if (latestDevRelease == null) latestDevRelease = aquireLatestDevRelease();
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if (latestMainRelease == null) latestMainRelease = aquireLatestMainRelease();
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}
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}
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public static yacyVersion aquireLatestDevRelease() {
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// get the latest release info from a internet resource
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try {
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return latestReleaseFrom(new URL("http://latest.yacy-forum.net"));
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} catch (MalformedURLException e) {
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return null;
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}
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}
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public static yacyVersion aquireLatestMainRelease() {
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// get the latest release info from a internet resource
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try {
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return latestReleaseFrom(new URL("http://yacy.net/yacy/Download.html"));
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} catch (MalformedURLException e) {
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return null;
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}
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}
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public static yacyVersion latestReleaseFrom(URL url) {
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// retrieves the latest info about releases
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// this is done by contacting a release location,
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// parsing the content and filtering+parsing links
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// returns the version info if successful, null otherwise
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htmlFilterContentScraper scraper;
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try {
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scraper = htmlFilterContentScraper.parseResource(url);
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} catch (IOException e) {
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return null;
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}
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// analyse links in scraper resource, and find link to latest release in it
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Map anchors = scraper.getAnchors(); // a url (String) / name (String) relation
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Iterator i = anchors.keySet().iterator();
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TreeSet releases = new TreeSet(); // will contain a release (Float) / url (String) relation
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yacyVersion release;
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while (i.hasNext()) {
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try {
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url = new URL((String) i.next());
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} catch (MalformedURLException e1) {
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continue; // just ignore invalid urls
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}
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try {
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release = new yacyVersion(url);
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//System.out.println("r " + release.toAnchor());
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releases.add(release);
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} catch (RuntimeException e) {
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// the release string was not well-formed.
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// that might have been another link
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// just dont care
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continue;
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}
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}
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if (releases.size() == 0) return null;
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//i = releases.iterator(); while (i.hasNext()) {System.out.println("v " + ((yacyVersion) i.next()).toAnchor());}
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return (yacyVersion) releases.last();
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}
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}
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