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104 lines
4.2 KiB
104 lines
4.2 KiB
// ViewImage.java
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// -----------------------
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// part of YaCy
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// (C) by Michael Peter Christen; mc@anomic.de
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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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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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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.Toolkit;
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import java.net.MalformedURLException;
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import java.net.URL;
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import de.anomic.http.httpHeader;
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import de.anomic.plasma.plasmaSwitchboard;
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import de.anomic.server.serverObjects;
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import de.anomic.server.serverSwitch;
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public class ViewImage {
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public static Image respond(httpHeader header, serverObjects post, serverSwitch env) {
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plasmaSwitchboard sb = (plasmaSwitchboard)env;
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String urls = post.get("url", "");
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URL url;
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try {
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url = new URL(urls);
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} catch (MalformedURLException e1) {
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return null;
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}
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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 timeout = post.getInt("timeout", 5000);
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// load image
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byte[] imgb = sb.snippetCache.getResource(url, true, timeout);
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if (imgb == null) return null;
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// create image
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MediaTracker mediaTracker = new MediaTracker(new Container());
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Image original = Toolkit.getDefaultToolkit().createImage(imgb);
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mediaTracker.addImage(original, 0);
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try {mediaTracker.waitForID(0);} catch (InterruptedException e) {}
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boolean auth = ((String) header.get("CLIENTIP", "")).equals("localhost") || sb.verifyAuthentication(header, false); // handle access rights
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if ((auth) && ((width == 0) || (height == 0))) return original;
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// in case of not-authorized access shrink the image to prevent copyright problems
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// so that images are not larger than thumbnails
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if (!auth) {
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width = width / 2;
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height = height / 2;
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int xsc = Math.max(width, height);
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if (xsc > 64) {
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width = width * 64 / xsc;
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height = height * 64 / xsc;
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}
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}
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// scale image
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Image scaled = original.getScaledInstance(width, height, Image.SCALE_AREA_AVERAGING);
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mediaTracker.addImage(scaled, 0);
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try {mediaTracker.waitForID(0);} catch (InterruptedException e) {}
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return scaled;
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}
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}
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