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.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.logging.Logging;
  40 import net.pterodactylus.util.template.Template;
  41 import net.pterodactylus.util.template.TemplateContext;
  42 import net.pterodactylus.util.web.Method;
  43
  44 import com.google.common.io.ByteStreams;
  45
  46 import freenet.support.api.Bucket;
  47 import freenet.support.api.HTTPUploadedFile;
  48
  49 /**
  50  * Page implementation that lets the user upload an image.
  51  *
  52  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  53  */
  54 public class UploadImagePage extends SoneTemplatePage {
  55
  56         /** The logger. */
  57         private static final Logger logger = Logging.getLogger(UploadImagePage.class);
  58
  59         /**
  60          * Creates a new “upload image” page.
  61          *
  62          * @param template
  63          *            The template to render
  64          * @param webInterface
  65          *            The Sone web interface
  66          */
  67         public UploadImagePage(Template template, WebInterface webInterface) {
  68                 super("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true);
  69         }
  70
  71         //
  72         // SONETEMPLATEPAGE METHODS
  73         //
  74
  75         /**
  76          * {@inheritDoc}
  77          */
  78         @Override
  79         protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
  80                 super.processTemplate(request, templateContext);
  81                 if (request.getMethod() == Method.POST) {
  82                         Sone currentSone = getCurrentSone(request.getToadletContext());
  83                         String parentId = request.getHttpRequest().getPartAsStringFailsafe("parent", 36);
  84                         Album parent = webInterface.getCore().getAlbum(parentId, false);
  85                         if (parent == null) {
  86                                 /* TODO - signal error */
  87                                 return;
  88                         }
  89                         if (!currentSone.equals(parent.getSone())) {
  90                                 /* TODO - signal error. */
  91                                 return;
  92                         }
  93                         String name = request.getHttpRequest().getPartAsStringFailsafe("title", 200);
  94                         String description = request.getHttpRequest().getPartAsStringFailsafe("description", 4000);
  95                         HTTPUploadedFile uploadedFile = request.getHttpRequest().getUploadedFile("image");
  96                         Bucket fileBucket = uploadedFile.getData();
  97                         InputStream imageInputStream = null;
  98                         ByteArrayOutputStream imageDataOutputStream = null;
  99                         net.pterodactylus.sone.data.Image image = null;
 100                         try {
 101                                 imageInputStream = fileBucket.getInputStream();
 102                                 /* TODO - check length */
 103                                 imageDataOutputStream = new ByteArrayOutputStream((int) fileBucket.size());
 104                                 ByteStreams.copy(imageInputStream, imageDataOutputStream);
 105                         } catch (IOException ioe1) {
 106                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 107                                 return;
 108                         } finally {
 109                                 fileBucket.free();
 110                                 Closer.close(imageInputStream);
 111                                 Closer.close(imageDataOutputStream);
 112                         }
 113                         byte[] imageData = imageDataOutputStream.toByteArray();
 114                         ByteArrayInputStream imageDataInputStream = null;
 115                         Image uploadedImage = null;
 116                         try {
 117                                 imageDataInputStream = new ByteArrayInputStream(imageData);
 118                                 uploadedImage = ImageIO.read(imageDataInputStream);
 119                                 if (uploadedImage == null) {
 120                                         templateContext.set("messages", webInterface.getL10n().getString("Page.UploadImage.Error.InvalidImage"));
 121                                         return;
 122                                 }
 123                                 String mimeType = getMimeType(imageData);
 124                                 TemporaryImage temporaryImage = webInterface.getCore().createTemporaryImage(mimeType, imageData);
 125                                 image = webInterface.getCore().createImage(currentSone, parent, temporaryImage);
 126                                 image.modify().setTitle(name).setDescription(TextFilter.filter(request.getHttpRequest().getHeader("host"), description)).setWidth(uploadedImage.getWidth(null)).setHeight(uploadedImage.getHeight(null)).update();
 127                         } catch (IOException ioe1) {
 128                                 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
 129                                 return;
 130                         } finally {
 131                                 Closer.close(imageDataInputStream);
 132                                 Closer.flush(uploadedImage);
 133                         }
 134                         throw new RedirectException("imageBrowser.html?album=" + parent.getId());
 135                 }
 136         }
 137
 138         //
 139         // PRIVATE METHODS
 140         //
 141
 142         /**
 143          * Tries to detect the MIME type of the encoded image.
 144          *
 145          * @param imageData
 146          *            The encoded image
 147          * @return The MIME type of the image, or “application/octet-stream” if the
 148          *         image type could not be detected
 149          */
 150         private static String getMimeType(byte[] imageData) {
 151                 ByteArrayInputStream imageDataInputStream = new ByteArrayInputStream(imageData);
 152                 try {
 153                         ImageInputStream imageInputStream = ImageIO.createImageInputStream(imageDataInputStream);
 154                         Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
 155                         if (imageReaders.hasNext()) {
 156                                 return imageReaders.next().getOriginatingProvider().getMIMETypes()[0];
 157                         }
 158                 } catch (IOException ioe1) {
 159                         logger.log(Level.FINE, "Could not detect MIME type for image.", ioe1);
 160                 }
 161                 return "application/octet-stream";
 162         }
 163
 164 }