2 * Sone - UploadImagePage.java - Copyright © 2011–2013 David Roden
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.
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.
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/>.
18 package net.pterodactylus.sone.web;
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;
33 import javax.imageio.ImageIO;
34 import javax.imageio.ImageReader;
35 import javax.imageio.stream.ImageInputStream;
37 import net.pterodactylus.sone.data.Album;
38 import net.pterodactylus.sone.data.Sone;
39 import net.pterodactylus.sone.data.TemporaryImage;
40 import net.pterodactylus.sone.text.TextFilter;
41 import net.pterodactylus.sone.web.page.FreenetRequest;
42 import net.pterodactylus.util.io.Closer;
43 import net.pterodactylus.util.logging.Logging;
44 import net.pterodactylus.util.template.Template;
45 import net.pterodactylus.util.template.TemplateContext;
46 import net.pterodactylus.util.web.Method;
48 import com.google.common.io.ByteStreams;
50 import freenet.support.api.Bucket;
51 import freenet.support.api.HTTPUploadedFile;
54 * Page implementation that lets the user upload an image.
56 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
58 public class UploadImagePage extends SoneTemplatePage {
61 private static final Logger logger = Logging.getLogger(UploadImagePage.class);
64 * Creates a new “upload image” page.
67 * The template to render
69 * The Sone web interface
71 public UploadImagePage(Template template, WebInterface webInterface) {
72 super("uploadImage.html", template, "Page.UploadImage.Title", webInterface, true);
76 // SONETEMPLATEPAGE METHODS
83 protected void processTemplate(FreenetRequest request, TemplateContext templateContext) throws RedirectException {
84 super.processTemplate(request, templateContext);
85 if (request.getMethod() == Method.POST) {
86 Sone currentSone = getCurrentSone(request.getToadletContext());
87 String parentId = request.getHttpRequest().getPartAsStringFailsafe("parent", 36);
88 Album parent = webInterface.getCore().getAlbum(parentId, false);
90 /* TODO - signal error */
93 if (!currentSone.equals(parent.getSone())) {
94 /* TODO - signal error. */
97 String name = request.getHttpRequest().getPartAsStringFailsafe("title", 200);
98 String description = request.getHttpRequest().getPartAsStringFailsafe("description", 4000);
99 HTTPUploadedFile uploadedFile = request.getHttpRequest().getUploadedFile("image");
100 Bucket fileBucket = uploadedFile.getData();
101 InputStream imageInputStream = null;
102 ByteArrayOutputStream imageDataOutputStream = null;
103 net.pterodactylus.sone.data.Image image = null;
105 imageInputStream = fileBucket.getInputStream();
106 /* TODO - check length */
107 imageDataOutputStream = new ByteArrayOutputStream((int) fileBucket.size());
108 ByteStreams.copy(imageInputStream, imageDataOutputStream);
109 } catch (IOException ioe1) {
110 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
114 Closer.close(imageInputStream);
115 Closer.close(imageDataOutputStream);
117 byte[] imageData = imageDataOutputStream.toByteArray();
118 ByteArrayInputStream imageDataInputStream = null;
119 Image uploadedImage = null;
121 imageDataInputStream = new ByteArrayInputStream(imageData);
122 uploadedImage = ImageIO.read(imageDataInputStream);
123 if (uploadedImage == null) {
124 templateContext.set("messages", webInterface.getL10n().getString("Page.UploadImage.Error.InvalidImage"));
127 String mimeType = getMimeType(imageData);
128 Dimension imageSize = getImageDimensions(uploadedImage);
129 TemporaryImage temporaryImage = webInterface.getCore().createTemporaryImage(mimeType, imageData, imageSize.width, imageSize.height);
130 image = webInterface.getCore().createImage(currentSone, parent, temporaryImage);
131 image.modify().setTitle(name).setDescription(TextFilter.filter(request.getHttpRequest().getHeader("host"), description)).update();
132 } catch (IOException ioe1) {
133 logger.log(Level.WARNING, "Could not read uploaded image!", ioe1);
136 Closer.close(imageDataInputStream);
137 Closer.flush(uploadedImage);
139 throw new RedirectException("imageBrowser.html?album=" + parent.getId());
143 private static Dimension getImageDimensions(Image uploadedImage) {
144 final CountDownLatch widthHeightLatch = new CountDownLatch(2);
145 final AtomicInteger finalWidth = new AtomicInteger();
146 final AtomicInteger finalHeight = new AtomicInteger();
147 ImageObserver imageObserver = new ImageObserver() {
149 public boolean imageUpdate(Image image, int infoFlags, int x, int y, int width, int height) {
150 if ((infoFlags & WIDTH) != 0) {
151 finalWidth.set(width);
152 widthHeightLatch.countDown();
154 if ((infoFlags & HEIGHT) != 0) {
155 finalHeight.set(width);
156 widthHeightLatch.countDown();
158 return (infoFlags & ALLBITS) != 0;
161 finalWidth.set(uploadedImage.getWidth(imageObserver));
162 finalHeight.set(uploadedImage.getHeight(imageObserver));
163 while ((finalWidth.get() == -1) || (finalHeight.get() == -1)) {
165 widthHeightLatch.await();
166 } catch (InterruptedException ie1) {
167 logger.log(Level.WARNING, "Interrupted while waiting for latch...");
170 return new Dimension(finalWidth.get(), finalHeight.get());
178 * Tries to detect the MIME type of the encoded image.
182 * @return The MIME type of the image, or “application/octet-stream” if the
183 * image type could not be detected
185 private static String getMimeType(byte[] imageData) {
186 ByteArrayInputStream imageDataInputStream = new ByteArrayInputStream(imageData);
188 ImageInputStream imageInputStream = ImageIO.createImageInputStream(imageDataInputStream);
189 Iterator<ImageReader> imageReaders = ImageIO.getImageReaders(imageInputStream);
190 if (imageReaders.hasNext()) {
191 return imageReaders.next().getOriginatingProvider().getMIMETypes()[0];
193 } catch (IOException ioe1) {
194 logger.log(Level.FINE, "Could not detect MIME type for image.", ioe1);
196 return "application/octet-stream";