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

   1 /*
   2  * Sone - UploadImagePage.java - Copyright © 2011–2012 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.text.TextFilter;
  37 import net.pterodactylus.sone.web.page.FreenetRequest;
  38 import net.pterodactylus.util.io.Closer;
  39 import net.pterodactylus.util.io.StreamCopier;
  40 import net.pterodactylus.util.logging.Logging;
  41 import net.pterodactylus.util.template.Template;
  42 import net.pterodactylus.util.template.TemplateContext;
  43 import net.pterodactylus.util.web.Method;
  44 import freenet.support.api.Bucket;
  45 import freenet.support.api.HTTPUploadedFile;
  46
  47 /**
  48  * Page implementation that lets the user upload an image.
  49  *
  50  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  51  */
  52 public class UploadImagePage extends SoneTemplatePage {
  53
  54         /** The logger. */
  55         private static final Logger logger = Logging.getLogger(UploadImagePage.class);
  56
  57         /**
  58          * Creates a new “upload image” page.
  59          *
  60          * @param template
  61          *            The template to render
  62          * @param webInterface
  63          *            The Sone web interface
  64          */
  65         public UploadImagePage(Template template, WebInterface webInterface) {
  66                 super("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true);
  67         }
  68
  69         //
  70         // SONETEMPLATEPAGE METHODS
  71         //
  72
  73         /**
  74          * {@inheritDoc}
  75          */
  76         @Override
  77         protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
  78                 super.processTemplate(request, templateContext);
  79                 if (request.getMethod() == Method.POST) {
  80                         Sone currentSone = getCurrentSone(request.getToadletContext());
  81                         String parentId = request.getHttpRequest().getPartAsStringFailsafe("parent", 36);
  82                         Album parent = webInterface.getCore().getAlbum(parentId, false);
  83                         if (parent == null) {
  84                                 /* TODO - signal error */
  85                                 return;
  86                         }
  87                         if (!currentSone.equals(parent.getSone())) {
  88                                 /* TODO - signal error. */
  89                                 return;
  90                         }
  91                         String name = request.getHttpRequest().getPartAsStringFailsafe("title", 200);
  92                         String description = request.getHttpRequest().getPartAsStringFailsafe("description", 4000);
  93                         HTTPUploadedFile uploadedFile = request.getHttpRequest().getUploadedFile("image");
  94                         Bucket fileBucket = uploadedFile.getData();
  95                         InputStream imageInputStream = null;
  96                         ByteArrayOutputStream imageDataOutputStream = null;
  97                         net.pterodactylus.sone.data.Image image = null;
  98                         try {
  99                                 imageInputStream = fileBucket.getInputStream();
 100                                 /* TODO - check length */
 101                                 imageDataOutputStream = new ByteArrayOutputStream((int) fileBucket.size());
 102                                 StreamCopier.copy(imageInputStream, imageDataOutputStream);
 103                         } catch (IOException ioe1) {
 104                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 105                                 return;
 106                         } finally {
 107                                 fileBucket.free();
 108                                 Closer.close(imageInputStream);
 109                                 Closer.close(imageDataOutputStream);
 110                         }
 111                         byte[] imageData = imageDataOutputStream.toByteArray();
 112                         ByteArrayInputStream imageDataInputStream = null;
 113                         Image uploadedImage = null;
 114                         try {
 115                                 imageDataInputStream = new ByteArrayInputStream(imageData);
 116                                 uploadedImage = ImageIO.read(imageDataInputStream);
 117                                 if (uploadedImage == null) {
 118                                         templateContext.set("messages", webInterface.getL10n().getString("Page.UploadImage.Error.InvalidImage"));
 119                                         return;
 120                                 }
 121                                 String mimeType = getMimeType(imageData);
 122                                 TemporaryImage temporaryImage = webInterface.getCore().createTemporaryImage(mimeType, imageData);
 123                                 image = webInterface.getCore().createImage(currentSone, parent, temporaryImage);
 124                                 image.setTitle(name).setDescription(TextFilter.filter(request.getHttpRequest().getHeader("host"), description)).setWidth(uploadedImage.getWidth(null)).setHeight(uploadedImage.getHeight(null));
 125                         } catch (IOException ioe1) {
 126                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 127                                 return;
 128                         } finally {
 129                                 Closer.close(imageDataInputStream);
 130                                 Closer.flush(uploadedImage);
 131                         }
 132                         throw new RedirectException("imageBrowser.html?album=" + parent.getId());
 133                 }
 134         }
 135
 136         //
 137         // PRIVATE METHODS
 138         //
 139
 140         /**
 141          * Tries to detect the MIME type of the encoded image.
 142          *
 143          * @param imageData
 144          *            The encoded image
 145          * @return The MIME type of the image, or “application/octet-stream” if the
 146          *         image type could not be detected
 147          */
 148         private String getMimeType(byte[] imageData) {
 149                 ByteArrayInputStream imageDataInputStream = new ByteArrayInputStream(imageData);
 150                 try {
 151                         ImageInputStream imageInputStream = ImageIO.createImageInputStream(imageDataInputStream);
 152                         Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
 153                         if (imageReaders.hasNext()) {
 154                                 return imageReaders.next().getOriginatingProvider().getMIMETypes()[0];
 155                         }
 156                 } catch (IOException ioe1) {
 157                         logger.log(Level.FINE, "Could not detect MIME type for image.", ioe1);
 158                 }
 159                 return "application/octet-stream";
 160         }
 161
 162 }