src/main/java/net/pterodactylus/sone/web/UploadImagePage.java

   1 /*
   2  * Sone - UploadImagePage.java - Copyright © 2011–2013 David Roden
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.pterodactylus.sone.web;
  19
  20 import java.awt.Dimension;
  21 import java.awt.Image;
  22 import java.awt.image.ImageObserver;
  23 import java.io.ByteArrayInputStream;
  24 import java.io.ByteArrayOutputStream;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.util.Iterator;
  28 import java.util.concurrent.CountDownLatch;
  29 import java.util.concurrent.atomic.AtomicInteger;
  30 import java.util.logging.Level;
  31 import java.util.logging.Logger;
  32 import javax.imageio.ImageIO;
  33 import javax.imageio.ImageReader;
  34 import javax.imageio.stream.ImageInputStream;
  35
  36 import net.pterodactylus.sone.data.Album;
  37 import net.pterodactylus.sone.data.Sone;
  38 import net.pterodactylus.sone.data.TemporaryImage;
  39 import net.pterodactylus.sone.text.TextFilter;
  40 import net.pterodactylus.sone.web.page.FreenetRequest;
  41 import net.pterodactylus.util.io.Closer;
  42 import net.pterodactylus.util.logging.Logging;
  43 import net.pterodactylus.util.template.Template;
  44 import net.pterodactylus.util.template.TemplateContext;
  45 import net.pterodactylus.util.web.Method;
  46
  47 import freenet.support.api.Bucket;
  48 import freenet.support.api.HTTPUploadedFile;
  49
  50 import com.google.common.base.Optional;
  51 import com.google.common.io.ByteStreams;
  52
  53 /**
  54  * Page implementation that lets the user upload an image.
  55  *
  56  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  57  */
  58 public class UploadImagePage extends SoneTemplatePage {
  59
  60         /** The logger. */
  61         private static final Logger logger = Logging.getLogger(UploadImagePage.class);
  62
  63         /**
  64          * Creates a new “upload image” page.
  65          *
  66          * @param template
  67          *            The template to render
  68          * @param webInterface
  69          *            The Sone web interface
  70          */
  71         public UploadImagePage(Template template, WebInterface webInterface) {
  72                 super("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true);
  73         }
  74
  75         //
  76         // SONETEMPLATEPAGE METHODS
  77         //
  78
  79         @Override
  80         protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
  81                 super.processTemplate(request, templateContext);
  82                 if (request.getMethod() == Method.POST) {
  83                         Sone currentSone = getCurrentSone(request.getToadletContext());
  84                         String parentId = request.getHttpRequest().getPartAsStringFailsafe("parent", 36);
  85                         Optional<Album> parent = webInterface.getCore().getAlbum(parentId);
  86                         if (!parent.isPresent()) {
  87                                 /* TODO - signal error */
  88                                 return;
  89                         }
  90                         if (!currentSone.equals(parent.get().getSone())) {
  91                                 /* TODO - signal error. */
  92                                 return;
  93                         }
  94                         String name = request.getHttpRequest().getPartAsStringFailsafe("title", 200);
  95                         String description = request.getHttpRequest().getPartAsStringFailsafe("description", 4000);
  96                         HTTPUploadedFile uploadedFile = request.getHttpRequest().getUploadedFile("image");
  97                         Bucket fileBucket = uploadedFile.getData();
  98                         InputStream imageInputStream = null;
  99                         ByteArrayOutputStream imageDataOutputStream = null;
 100                         net.pterodactylus.sone.data.Image image = null;
 101                         try {
 102                                 imageInputStream = fileBucket.getInputStream();
 103                                 /* TODO - check length */
 104                                 imageDataOutputStream = new ByteArrayOutputStream((int) fileBucket.size());
 105                                 ByteStreams.copy(imageInputStream, imageDataOutputStream);
 106                         } catch (IOException ioe1) {
 107                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 108                                 return;
 109                         } finally {
 110                                 fileBucket.free();
 111                                 Closer.close(imageInputStream);
 112                                 Closer.close(imageDataOutputStream);
 113                         }
 114                         byte[] imageData = imageDataOutputStream.toByteArray();
 115                         ByteArrayInputStream imageDataInputStream = null;
 116                         Image uploadedImage = null;
 117                         try {
 118                                 imageDataInputStream = new ByteArrayInputStream(imageData);
 119                                 uploadedImage = ImageIO.read(imageDataInputStream);
 120                                 if (uploadedImage == null) {
 121                                         templateContext.set("messages", webInterface.getL10n().getString("Page.UploadImage.Error.InvalidImage"));
 122                                         return;
 123                                 }
 124                                 String mimeType = getMimeType(imageData);
 125                                 Dimension imageSize = getImageDimensions(uploadedImage);
 126                                 TemporaryImage temporaryImage = webInterface.getCore().createTemporaryImage(mimeType, imageData, imageSize.width, imageSize.height);
 127                                 image = webInterface.getCore().createImage(currentSone, parent.get(), temporaryImage);
 128                                 image.modify().setTitle(name).setDescription(TextFilter.filter(request.getHttpRequest().getHeader("host"), description)).update();
 129                         } catch (IOException ioe1) {
 130                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 131                                 return;
 132                         } finally {
 133                                 Closer.close(imageDataInputStream);
 134                                 Closer.flush(uploadedImage);
 135                         }
 136                         throw new RedirectException("imageBrowser.html?album=" + parent.get().getId());
 137                 }
 138         }
 139
 140         private static Dimension getImageDimensions(Image uploadedImage) {
 141                 final CountDownLatch widthHeightLatch = new CountDownLatch(2);
 142                 final AtomicInteger finalWidth = new AtomicInteger();
 143                 final AtomicInteger finalHeight = new AtomicInteger();
 144                 ImageObserver imageObserver = new ImageObserver() {
 145                         @Override
 146                         public boolean imageUpdate(Image image, int infoFlags, int x, int y, int width, int height) {
 147                                 if ((infoFlags & WIDTH) != 0) {
 148                                         finalWidth.set(width);
 149                                         widthHeightLatch.countDown();
 150                                 }
 151                                 if ((infoFlags & HEIGHT) != 0) {
 152                                         finalHeight.set(width);
 153                                         widthHeightLatch.countDown();
 154                                 }
 155                                 return (infoFlags & ALLBITS) != 0;
 156                         }
 157                 };
 158                 finalWidth.set(uploadedImage.getWidth(imageObserver));
 159                 finalHeight.set(uploadedImage.getHeight(imageObserver));
 160                 while ((finalWidth.get() == -1) || (finalHeight.get() == -1)) {
 161                         try {
 162                                 widthHeightLatch.await();
 163                         } catch (InterruptedException ie1) {
 164                                 logger.log(Level.WARNING, "Interrupted while waiting for latch...");
 165                         }
 166                 }
 167                 return new Dimension(finalWidth.get(), finalHeight.get());
 168         }
 169
 170         //
 171         // PRIVATE METHODS
 172         //
 173
 174         /**
 175          * Tries to detect the MIME type of the encoded image.
 176          *
 177          * @param imageData
 178          *            The encoded image
 179          * @return The MIME type of the image, or “application/octet-stream” if the
 180          *         image type could not be detected
 181          */
 182         private static String getMimeType(byte[] imageData) {
 183                 ByteArrayInputStream imageDataInputStream = new ByteArrayInputStream(imageData);
 184                 try {
 185                         ImageInputStream imageInputStream = ImageIO.createImageInputStream(imageDataInputStream);
 186                         Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
 187                         if (imageReaders.hasNext()) {
 188                                 return imageReaders.next().getOriginatingProvider().getMIMETypes()[0];
 189                         }
 190                 } catch (IOException ioe1) {
 191                         logger.log(Level.FINE, "Could not detect MIME type for image.", ioe1);
 192                 }
 193                 return "application/octet-stream";
 194         }
 195
 196 }