// ViewImage.java // ----------------------- // part of YaCy // (C) by Michael Peter Christen; mc@anomic.de // first published on http://www.anomic.de // Frankfurt, Germany, 2006 // created 03.04.2006 // // 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 // // Using this software in any meaning (reading, learning, copying, compiling, // running) means that you agree that the Author(s) is (are) not responsible // for cost, loss of data or any harm that may be caused directly or indirectly // by usage of this softare or this documentation. The usage of this software // is on your own risk. The installation and usage (starting/running) of this // software may allow other people or application to access your computer and // any attached devices and is highly dependent on the configuration of the // software which must be done by the user of the software; the author(s) is // (are) also not responsible for proper configuration and usage of the // software, even if provoked by documentation provided together with // the software. // // Any changes to this file according to the GPL as documented in the file // gpl.txt aside this file in the shipment you received can be done to the // lines that follows this copyright notice here, but changes must not be // done inside the copyright notive above. A re-distribution must contain // the intact and unchanged copyright notice. // Contributions and changes to the program code must be marked as such. import java.awt.Container; import java.awt.Image; import java.awt.MediaTracker; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.net.MalformedURLException; import de.anomic.http.httpHeader; import de.anomic.net.URL; import de.anomic.plasma.plasmaSnippetCache; import de.anomic.plasma.plasmaSwitchboard; import de.anomic.server.serverFileUtils; import de.anomic.server.serverObjects; import de.anomic.server.serverSwitch; import de.anomic.ymage.ymageImageParser; public class ViewImage { public static Image respond(httpHeader header, serverObjects post, serverSwitch env) { plasmaSwitchboard sb = (plasmaSwitchboard)env; // the url to the image can be either submitted with an url in clear text, or using a license key // if the url is given as clear text, the user must be authorized as admin // the license can be used also from non-authorized users String urlString = post.get("url", ""); String urlLicense = post.get("code", ""); boolean auth = ((String) header.get("CLIENTIP", "")).equals("localhost") || sb.verifyAuthentication(header, true); // handle access rights URL url = null; if ((urlString.length() > 0) && (auth)) try { url = new URL(urlString); } catch (MalformedURLException e1) { url = null; } if ((url == null) && (urlLicense.length() > 0)) { url = sb.licensedURLs.releaseLicense(urlLicense); urlString = (url == null) ? null : url.toNormalform(true, true); } if (url == null) return null; System.out.println("loading image from " + url.toString()); int width = post.getInt("width", 0); int height = post.getInt("height", 0); int maxwidth = post.getInt("maxwidth", 0); int maxheight = post.getInt("maxheight", 0); int timeout = post.getInt("timeout", 5000); // getting the image as stream Object[] resource = plasmaSnippetCache.getResource(url, true, timeout, false); byte[] imgb = null; if (resource == null) { if (urlString.endsWith(".ico")) { // load default favicon dfltfvcn.ico try { imgb = serverFileUtils.read(new File(sb.getRootPath(), "htroot/env/grafics/dfltfvcn.ico")); } catch (IOException e) { return null; } } else { return null; } } else { InputStream imgStream = (InputStream) resource[0]; if (imgStream == null) return null; // read image data try { imgb = serverFileUtils.read(imgStream); } catch (IOException e) { return null; } finally { try { imgStream.close(); } catch (Exception e) {/* ignore this */} } } // read image Image image = ymageImageParser.parse(urlString.toString(), imgb); if ((auth) && ((width == 0) || (height == 0)) && (maxwidth == 0) && (maxheight == 0)) return image; // find original size int h = image.getHeight(null); int w = image.getWidth(null); //System.out.println("DEBUG: get access to image " + url.toNormalform() + " is " + ((auth) ? "authorized" : "NOT authorized")); // in case of not-authorized access shrink the image to prevent copyright problems // so that images are not larger than thumbnails if (!auth) { maxwidth = (int) Math.min(64.0, w * 0.6); maxheight = (int) Math.min(64.0, h * 0.6); } // calculate width & height from maxwidth & maxheight if ((maxwidth != 0) || (maxheight != 0)) { double hs = (w <= maxwidth) ? 1.0 : ((double) maxwidth) / ((double) w); double vs = (h <= maxheight) ? 1.0 : ((double) maxheight) / ((double) h); double scale = Math.min(hs, vs); if (!auth) scale = Math.min(scale, 0.6); // this is for copyright purpose if (scale < 1.0) { width = (int) (((double) w) * scale); height = (int) (((double) h) * scale); } else { width = w; height = h; } } else { width = w; height = h; } // check for minimum values width = Math.max(width, 1); height = Math.max(height, 1); // scale image Image scaled = image.getScaledInstance(width, height, Image.SCALE_AREA_AVERAGING); MediaTracker mediaTracker = new MediaTracker(new Container()); mediaTracker.addImage(scaled, 0); try {mediaTracker.waitForID(0);} catch (InterruptedException e) {} return scaled; } }