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5f0ab25382
MultiProtocolURI during normalform computation because that should always be done and also be done during initialization of the MultiProtocolURI Object. The new normalform method takes only one argument which should be 'true' unless you know exactly what you are doing.
208 lines
8.3 KiB
Java
208 lines
8.3 KiB
Java
// ViewImage.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@yacy.net
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2006
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// created 03.04.2006
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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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import java.awt.Container;
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import java.awt.Image;
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import java.awt.MediaTracker;
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import java.awt.image.BufferedImage;
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import java.awt.image.Raster;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.util.Map;
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import net.yacy.cora.federate.yacy.CacheStrategy;
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import net.yacy.cora.protocol.Domains;
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import net.yacy.cora.protocol.HeaderFramework;
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import net.yacy.cora.protocol.RequestHeader;
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import net.yacy.cora.storage.ConcurrentARC;
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import net.yacy.crawler.data.CrawlQueues;
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import net.yacy.document.ImageParser;
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import net.yacy.kelondro.data.meta.DigestURI;
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import net.yacy.kelondro.logging.Log;
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import net.yacy.kelondro.util.FileUtils;
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import net.yacy.kelondro.util.MemoryControl;
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import net.yacy.repository.Blacklist.BlacklistType;
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import net.yacy.search.Switchboard;
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import net.yacy.server.serverObjects;
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import net.yacy.server.serverSwitch;
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public class ViewImage {
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private static Map<String, Image> iconcache = new ConcurrentARC<String, Image>(1000, Math.max(10, Math.min(32, Runtime.getRuntime().availableProcessors() * 2)));
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private static String defaulticon = "htroot/env/grafics/dfltfvcn.ico";
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private static byte[] defaulticonb;
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static {
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try {
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defaulticonb = FileUtils.read(new File(defaulticon));
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} catch (final IOException e) {
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}
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}
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public static Image respond(final RequestHeader header, final serverObjects post, final serverSwitch env) {
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final Switchboard sb = (Switchboard)env;
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// the url to the image can be either submitted with an url in clear text, or using a license key
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// if the url is given as clear text, the user must be authorized as admin
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// the license can be used also from non-authorized users
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String urlString = post.get("url", "");
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final String urlLicense = post.get("code", "");
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final boolean auth = Domains.isLocalhost(header.get(HeaderFramework.CONNECTION_PROP_CLIENTIP, "")) || sb.verifyAuthentication(header); // handle access rights
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DigestURI url = null;
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if ((urlString.length() > 0) && (auth)) try {
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url = new DigestURI(urlString);
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} catch (final MalformedURLException e1) {
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url = null;
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}
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if ((url == null) && (urlLicense.length() > 0)) {
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url = sb.licensedURLs.releaseLicense(urlLicense);
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urlString = (url == null) ? null : url.toNormalform(true);
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}
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if (urlString == null) return null;
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int width = post.getInt("width", 0);
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int height = post.getInt("height", 0);
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int maxwidth = post.getInt("maxwidth", 0);
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int maxheight = post.getInt("maxheight", 0);
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// get the image as stream
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if (MemoryControl.shortStatus()) iconcache.clear();
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Image image = iconcache.get(urlString);
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if (image == null) {
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byte[] resourceb = null;
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if (url != null) try {
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resourceb = sb.loader.loadContent(sb.loader.request(url, false, true), CacheStrategy.IFEXIST, BlacklistType.SEARCH, CrawlQueues.queuedMinLoadDelay);
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} catch (final IOException e) {
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Log.logFine("ViewImage", "cannot load: " + e.getMessage());
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}
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byte[] imgb = null;
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if (resourceb == null) {
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if (urlString.endsWith(".ico")) {
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// load default favicon dfltfvcn.ico
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if (defaulticonb == null) try {
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imgb = FileUtils.read(new File(sb.getAppPath(), defaulticon));
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} catch (final IOException e) {
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return null;
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} else {
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imgb = defaulticonb;
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}
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} else {
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return null;
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}
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} else {
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final InputStream imgStream = new ByteArrayInputStream(resourceb);
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// read image data
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try {
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imgb = FileUtils.read(imgStream);
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} catch (final IOException e) {
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return null;
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} finally {
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try {
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imgStream.close();
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} catch (final Exception e) {}
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}
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}
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// read image
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image = ImageParser.parse(urlString, imgb);
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if (image == null || (auth && (width == 0 || height == 0) && maxwidth == 0 && maxheight == 0)) return image;
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// find original size
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final int h = image.getHeight(null);
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final int w = image.getWidth(null);
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// in case of not-authorized access shrink the image to prevent
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// copyright problems, so that images are not larger than thumbnails
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if (auth) {
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maxwidth = (maxwidth == 0) ? w : maxwidth;
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maxheight = (maxheight == 0) ? h : maxheight;
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} else if ((w > 16) || (h > 16)) {
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maxwidth = Math.min(96, w);
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maxheight = Math.min(96, h);
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} else {
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maxwidth = 16;
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maxheight = 16;
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}
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// calculate width & height from maxwidth & maxheight
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if (maxwidth < w || maxheight < h) {
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// scale image
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final double hs = (w <= maxwidth) ? 1.0 : ((double) maxwidth) / ((double) w);
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final double vs = (h <= maxheight) ? 1.0 : ((double) maxheight) / ((double) h);
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final double scale = Math.min(hs, vs);
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//if (!auth) scale = Math.min(scale, 0.6); // this is for copyright purpose
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if (scale < 1.0) {
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width = Math.max(1, (int) (w * scale));
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height = Math.max(1, (int) (h * scale));
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} else {
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width = Math.max(1, w);
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height = Math.max(1, h);
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}
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if (w != width && h != height) {
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// compute scaled image
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final Image scaled = image.getScaledInstance(width, height, Image.SCALE_AREA_AVERAGING);
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final MediaTracker mediaTracker = new MediaTracker(new Container());
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mediaTracker.addImage(scaled, 0);
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try {mediaTracker.waitForID(0);} catch (final InterruptedException e) {}
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// make a BufferedImage out of that
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final BufferedImage i = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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try {
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i.createGraphics().drawImage(scaled, 0, 0, width, height, null);
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image = i;
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// check outcome
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final Raster raster = i.getData();
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int[] pixel = new int[3];
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pixel = raster.getPixel(0, 0, pixel);
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if (pixel[0] != 0 || pixel[1] != 0 || pixel[2] != 0) image = i;
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} catch (final Exception e) {
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//java.lang.ClassCastException: [I cannot be cast to [B
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}
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}
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} else {
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// do not scale
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width = w;
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height = h;
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}
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if ((height == 16) && (width == 16) && (resourceb != null)) {
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// this might be a favicon, store image to cache for faster re-load later on
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iconcache.put(urlString, image);
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}
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}
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return image;
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}
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}
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