// WebStructurePicture.java // (C) 2007 by Michael Peter Christen; mc@yacy.net, Frankfurt a. M., Germany // first published 22.05.2007 on http://yacy.net // // This is a part of YaCy, a peer-to-peer based web search engine // // $LastChangedDate$ // $LastChangedRevision$ // $LastChangedBy$ // // LICENSE // // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 2 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 General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA import java.net.MalformedURLException; import java.util.AbstractMap; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import net.yacy.cora.document.encoding.ASCII; import net.yacy.cora.document.id.DigestURL; import net.yacy.cora.order.Base64Order; import net.yacy.cora.protocol.RequestHeader; import net.yacy.cora.sorting.ClusteredScoreMap; import net.yacy.cora.util.CommonPattern; import net.yacy.cora.util.ConcurrentLog; import net.yacy.peers.graphics.WebStructureGraph; import net.yacy.search.Switchboard; import net.yacy.server.serverObjects; import net.yacy.server.serverSwitch; import net.yacy.visualization.GraphPlotter; import net.yacy.visualization.GraphPlotter.Point; import net.yacy.visualization.PrintTool; import net.yacy.visualization.RasterPlotter; public class WebStructurePicture_p { private static final double maxlongd = Long.MAX_VALUE; public static RasterPlotter respond(@SuppressWarnings("unused") final RequestHeader header, final serverObjects post, final serverSwitch env) { final Switchboard sb = (Switchboard) env; String color_text = "888888"; String color_back = "FFFFFF"; String color_dot0 = "1111BB"; String color_dota = "11BB11"; String color_line = "222222"; String color_lineend = "333333"; int width = 1024; int height = 576; int depth = 3; int nodes = 300; // maximum number of host nodes that are painted int bf = 12; // maximum number of branches around nodes; less nodes makes the graphic look more structured int time = -1; String hosts = null; int cyc = 0; if (post != null) { width = post.getInt("width", 1024); if (width < 32 ) width = 32; if (width > 10000) width = 10000; height = post.getInt("height", 576); if (height < 24) height = 24; if (height > 10000) height = 10000; depth = post.getInt("depth", 3); if (depth > 8) depth = 8; if (depth < 0) depth = 0; nodes = post.getInt("nodes", width * height * 100 / 1024 / 576); bf = post.getInt("bf", depth <= 0 ? -1 : (int) Math.round(2.0d * Math.pow(nodes, 1.0d / depth))); time = post.getInt("time", -1); hosts = post.get("host", null); color_text = post.get("colortext", color_text); color_back = post.get("colorback", color_back); color_dot0 = post.get("colordot0", color_dot0); color_dota = post.get("colordota", color_dota); color_line = post.get("colorline", color_line); color_lineend = post.get("colorlineend", color_lineend); cyc = post.getInt("cyc", 0); } // calculate target time final long timeout = (time < 0) ? Long.MAX_VALUE : System.currentTimeMillis() + (time * 8 / 10); // find start point if (hosts == null || hosts.isEmpty() || hosts.equals("auto")) { // find domain with most references hosts = sb.webStructure.hostWithMaxReferences(); } final RasterPlotter graphPicture; if (hosts == null) { // probably no information available final RasterPlotter.DrawMode drawMode = (RasterPlotter.darkColor(color_back)) ? RasterPlotter.DrawMode.MODE_ADD : RasterPlotter.DrawMode.MODE_SUB; graphPicture = new RasterPlotter(width, height, drawMode, color_back); PrintTool.print(graphPicture, width / 2, height / 2, 0, "NO WEB STRUCTURE DATA AVAILABLE.", 0); PrintTool.print(graphPicture, width / 2, height / 2 + 16, 0, "START A WEB CRAWL TO OBTAIN STRUCTURE DATA.", 0); } else { // recursively find domains, up to a specific depth GraphPlotter graph = new GraphPlotter(); String[] hostlist = CommonPattern.COMMA.split(hosts); for (int i = 0; i < hostlist.length; i++) { String host = hostlist[i]; String hash = null; try {hash = ASCII.String((new DigestURL("http://" + host)).hash(), 6, 6);} catch (final MalformedURLException e) {ConcurrentLog.logException(e);} Map.Entry centernode = new AbstractMap.SimpleEntry(hash, host); double angle = 2.0d * i * Math.PI / hostlist.length; if (hostlist.length == 3) angle -= Math.PI / 2; if (hostlist.length == 4) angle += Math.PI / 4; graph.addNode(centernode.getValue(), Math.cos(angle) / 8, Math.sin(angle) / 8, 0); place(graph, sb.webStructure, centernode, bf, nodes, timeout, hostlist.length == 1 ? 0 : 1, hostlist.length == 1 ? depth : depth + 1, cyc); } // apply physics to it to get a better shape if (post != null && post.containsKey("pa")) { // test with: http://localhost:8090/WebStructurePicture_p.png?pa=1&ral=0.7&raa=0.5&rar=2&rel=0.5&rea=1&rer=2 GraphPlotter.Ribbon rAll = new GraphPlotter.Ribbon(post.getFloat("ral", 0.1f), post.getFloat("raa", 0.1f), post.getFloat("rar", 0.1f)); GraphPlotter.Ribbon rEdge = new GraphPlotter.Ribbon(post.getFloat("rel", 0.05f), post.getFloat("rea", 0.1f), post.getFloat("rer", 0.1f)); int pa = post.getInt("pa", 0); for (int i = 0; i < pa; i++) graph = graph.physics(rAll, rEdge); } // draw the graph graph.normalize(); graphPicture = graph.draw(width, height, 40, 40, 16, 16, 12, 6, color_back, color_dot0, color_dota, color_line, color_lineend, color_text); } // print headline graphPicture.setColor(Long.parseLong(color_text, 16)); PrintTool.print(graphPicture, 2, 8, 0, "YACY WEB-STRUCTURE ANALYSIS", -1); if (hosts != null) PrintTool.print(graphPicture, 2, 16, 0, "LINK ENVIRONMENT OF DOMAIN " + hosts.toUpperCase(), -1); PrintTool.print(graphPicture, width - 2, 8, 0, "SNAPSHOT FROM " + new Date().toString().toUpperCase(), 1); return graphPicture; } private static final int place( final GraphPlotter graph, final WebStructureGraph structure, Map.Entry pivotnode, int bf, int maxnodes, final long timeout, int nextlayer, final int maxlayer, final int cyc) { Point pivotpoint = graph.getNode(pivotnode.getValue()); int branches = 0; if (nextlayer == maxlayer) return branches; nextlayer++; final double radius = 1.0 / (1 << nextlayer); final WebStructureGraph.StructureEntry sr = structure.outgoingReferences(pivotnode.getKey()); final Map next = (sr == null) ? new HashMap() : sr.references; ClusteredScoreMap next0 = new ClusteredScoreMap(false); for (Map.Entry entry: next.entrySet()) next0.set(entry.getKey(), entry.getValue()); // first set points to next hosts final List> targets = new ArrayList>(); int maxtargetrefs = 8, maxthisrefs = 8; int targetrefs, thisrefs; double rr, re; Iterator i = next0.keys(false); while (i.hasNext()) { String targethash = i.next(); String targethost = structure.hostHash2hostName(targethash); if (targethost == null) continue; thisrefs = next.get(targethash).intValue(); targetrefs = structure.referencesCount(targethash); // can be cpu/time-critical maxtargetrefs = Math.max(targetrefs, maxtargetrefs); maxthisrefs = Math.max(thisrefs, maxthisrefs); targets.add(new AbstractMap.SimpleEntry(targethash, targethost)); if (graph.getNode(targethost) != null) continue; // set a new point. It is placed on a circle around the host point final double angle = ((Base64Order.enhancedCoder.cardinal((targethash + "____").getBytes()) / maxlongd) + (cyc / 360.0d)) * 2.0d * Math.PI; //System.out.println("ANGLE = " + angle); rr = radius * 0.25 * (1 - targetrefs / (double) maxtargetrefs); re = radius * 0.5 * (thisrefs / (double) maxthisrefs); graph.addNode(targethost, pivotpoint.x + (radius - rr - re) * Math.cos(angle), pivotpoint.y + (radius - rr - re) * Math.sin(angle), nextlayer); branches++; if (maxnodes-- <= 0 || (bf > 0 && branches >= bf) || System.currentTimeMillis() >= timeout) break; } // recursively set next hosts int nextnodes; for (Map.Entry target: targets) { nextnodes = ((maxnodes <= 0) || (System.currentTimeMillis() >= timeout)) ? 0 : place(graph, structure, target, bf, maxnodes, timeout, nextlayer, maxlayer, cyc); branches += nextnodes; maxnodes -= nextnodes; graph.setEdge(pivotnode.getValue(), target.getValue()); } return branches; } }