Use a static import.
[Sone.git] / 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 }