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

   1 /*
   2  * Sone - UploadImagePage.java - Copyright © 2011 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.Image;
  21 import java.io.ByteArrayInputStream;
  22 import java.io.ByteArrayOutputStream;
  23 import java.io.IOException;
  24 import java.io.InputStream;
  25 import java.util.Iterator;
  26 import java.util.logging.Level;
  27 import java.util.logging.Logger;
  28
  29 import javax.imageio.ImageIO;
  30 import javax.imageio.ImageReader;
  31 import javax.imageio.stream.ImageInputStream;
  32
  33 import net.pterodactylus.sone.data.Album;
  34 import net.pterodactylus.sone.data.Sone;
  35 import net.pterodactylus.sone.data.TemporaryImage;
  36 import net.pterodactylus.sone.web.page.FreenetRequest;
  37 import net.pterodactylus.util.io.Closer;
  38 import net.pterodactylus.util.io.StreamCopier;
  39 import net.pterodactylus.util.logging.Logging;
  40 import net.pterodactylus.util.template.Template;
  41 import net.pterodactylus.util.template.TemplateContext;
  42 import net.pterodactylus.util.web.Method;
  43 import freenet.support.api.Bucket;
  44 import freenet.support.api.HTTPUploadedFile;
  45
  46 /**
  47  * Page implementation that lets the user upload an image.
  48  *
  49  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  50  */
  51 public class UploadImagePage extends SoneTemplatePage {
  52
  53         /** The logger. */
  54         private static final Logger logger = Logging.getLogger(UploadImagePage.class);
  55
  56         /**
  57          * Creates a new “upload image” page.
  58          *
  59          * @param template
  60          *            The template to render
  61          * @param webInterface
  62          *            The Sone web interface
  63          */
  64         public UploadImagePage(Template template, WebInterface webInterface) {
  65                 super("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true);
  66         }
  67
  68         //
  69         // SONETEMPLATEPAGE METHODS
  70         //
  71
  72         /**
  73          * {@inheritDoc}
  74          */
  75         @Override
  76         protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
  77                 super.processTemplate(request, templateContext);
  78                 if (request.getMethod() == Method.POST) {
  79                         Sone currentSone = getCurrentSone(request.getToadletContext());
  80                         String parentId = request.getHttpRequest().getPartAsStringFailsafe("parent", 36);
  81                         Album parent = webInterface.getCore().getAlbum(parentId, false);
  82                         if (parent == null) {
  83                                 /* TODO - signal error */
  84                                 return;
  85                         }
  86                         if (!currentSone.equals(parent.getSone())) {
  87                                 /* TODO - signal error. */
  88                                 return;
  89                         }
  90                         String name = request.getHttpRequest().getPartAsStringFailsafe("title", 200);
  91                         String description = request.getHttpRequest().getPartAsStringFailsafe("description", 4000);
  92                         HTTPUploadedFile uploadedFile = request.getHttpRequest().getUploadedFile("image");
  93                         Bucket fileBucket = uploadedFile.getData();
  94                         InputStream imageInputStream = null;
  95                         ByteArrayOutputStream imageDataOutputStream = null;
  96                         net.pterodactylus.sone.data.Image image = null;
  97                         try {
  98                                 imageInputStream = fileBucket.getInputStream();
  99                                 /* TODO - check length */
 100                                 imageDataOutputStream = new ByteArrayOutputStream((int) fileBucket.size());
 101                                 StreamCopier.copy(imageInputStream, imageDataOutputStream);
 102                         } catch (IOException ioe1) {
 103                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 104                                 return;
 105                         } finally {
 106                                 fileBucket.free();
 107                                 Closer.close(imageInputStream);
 108                                 Closer.close(imageDataOutputStream);
 109                         }
 110                         byte[] imageData = imageDataOutputStream.toByteArray();
 111                         ByteArrayInputStream imageDataInputStream = null;
 112                         Image uploadedImage = null;
 113                         try {
 114                                 imageDataInputStream = new ByteArrayInputStream(imageData);
 115                                 uploadedImage = ImageIO.read(imageDataInputStream);
 116                                 if (uploadedImage == null) {
 117                                         templateContext.set("messages", webInterface.getL10n().getString("Page.UploadImage.Error.InvalidImage"));
 118                                         return;
 119                                 }
 120                                 String mimeType = getMimeType(imageData);
 121                                 TemporaryImage temporaryImage = webInterface.getCore().createTemporaryImage(mimeType, imageData);
 122                                 image = webInterface.getCore().createImage(currentSone, parent, temporaryImage);
 123                                 image.setTitle(name).setDescription(description).setWidth(uploadedImage.getWidth(null)).setHeight(uploadedImage.getHeight(null));
 124                         } catch (IOException ioe1) {
 125                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 126                                 return;
 127                         } finally {
 128                                 Closer.close(imageDataInputStream);
 129                                 Closer.flush(uploadedImage);
 130                         }
 131                         throw new RedirectException("imageBrowser.html?album=" + parent.getId());
 132                 }
 133         }
 134
 135         //
 136         // PRIVATE METHODS
 137         //
 138
 139         /**
 140          * Tries to detect the MIME type of the encoded image.
 141          *
 142          * @param imageData
 143          *            The encoded image
 144          * @return The MIME type of the image, or “application/octet-stream” if the
 145          *         image type could not be detected
 146          */
 147         private String getMimeType(byte[] imageData) {
 148                 ByteArrayInputStream imageDataInputStream = new ByteArrayInputStream(imageData);
 149                 try {
 150                         ImageInputStream imageInputStream = ImageIO.createImageInputStream(imageDataInputStream);
 151                         Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
 152                         if (imageReaders.hasNext()) {
 153                                 return imageReaders.next().getOriginatingProvider().getMIMETypes()[0];
 154                         }
 155                 } catch (IOException ioe1) {
 156                         logger.log(Level.FINE, "Could not detect MIME type for image.", ioe1);
 157                 }
 158                 return "application/octet-stream";
 159         }
 160
 161 }