| 1 | package be.nikiroo.utils; |
| 2 | |
| 3 | import java.awt.Image; |
| 4 | import java.awt.geom.AffineTransform; |
| 5 | import java.awt.image.AffineTransformOp; |
| 6 | import java.awt.image.BufferedImage; |
| 7 | import java.io.BufferedReader; |
| 8 | import java.io.File; |
| 9 | import java.io.FileInputStream; |
| 10 | import java.io.FileOutputStream; |
| 11 | import java.io.FileReader; |
| 12 | import java.io.FileWriter; |
| 13 | import java.io.IOException; |
| 14 | import java.io.InputStream; |
| 15 | import java.io.OutputStream; |
| 16 | import java.util.zip.ZipEntry; |
| 17 | import java.util.zip.ZipOutputStream; |
| 18 | |
| 19 | import javax.imageio.ImageIO; |
| 20 | |
| 21 | /** |
| 22 | * This class offer some utilities based around Streams. |
| 23 | * |
| 24 | * @author niki |
| 25 | */ |
| 26 | public class IOUtils { |
| 27 | /** |
| 28 | * Write the data to the given {@link File}. |
| 29 | * |
| 30 | * @param in |
| 31 | * the data source |
| 32 | * @param target |
| 33 | * the target {@link File} |
| 34 | * |
| 35 | * @throws IOException |
| 36 | * in case of I/O error |
| 37 | */ |
| 38 | public static void write(InputStream in, File target) throws IOException { |
| 39 | OutputStream out = new FileOutputStream(target); |
| 40 | try { |
| 41 | write(in, out); |
| 42 | } finally { |
| 43 | out.close(); |
| 44 | } |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * Write the data to the given {@link OutputStream}. |
| 49 | * |
| 50 | * @param in |
| 51 | * the data source |
| 52 | * @param target |
| 53 | * the target {@link OutputStream} |
| 54 | * |
| 55 | * @throws IOException |
| 56 | * in case of I/O error |
| 57 | */ |
| 58 | public static void write(InputStream in, OutputStream out) |
| 59 | throws IOException { |
| 60 | byte buffer[] = new byte[4069]; |
| 61 | for (int len = 0; (len = in.read(buffer)) > 0;) { |
| 62 | out.write(buffer, 0, len); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Recursively Add a {@link File} (which can thus be a directory, too) to a |
| 68 | * {@link ZipOutputStream}. |
| 69 | * |
| 70 | * @param zip |
| 71 | * the stream |
| 72 | * @param base |
| 73 | * the path to prepend to the ZIP info before the actual |
| 74 | * {@link File} path |
| 75 | * @param target |
| 76 | * the source {@link File} (which can be a directory) |
| 77 | * @param targetIsRoot |
| 78 | * FALSE if we need to add a {@link ZipEntry} for base/target, |
| 79 | * TRUE to add it at the root of the ZIP |
| 80 | * |
| 81 | * @throws IOException |
| 82 | * in case of I/O error |
| 83 | */ |
| 84 | public static void zip(ZipOutputStream zip, String base, File target, |
| 85 | boolean targetIsRoot) throws IOException { |
| 86 | if (target.isDirectory()) { |
| 87 | if (!targetIsRoot) { |
| 88 | if (base == null || base.isEmpty()) { |
| 89 | base = target.getName(); |
| 90 | } else { |
| 91 | base += "/" + target.getName(); |
| 92 | } |
| 93 | zip.putNextEntry(new ZipEntry(base + "/")); |
| 94 | } |
| 95 | for (File file : target.listFiles()) { |
| 96 | zip(zip, base, file, false); |
| 97 | } |
| 98 | } else { |
| 99 | if (base == null || base.isEmpty()) { |
| 100 | base = target.getName(); |
| 101 | } else { |
| 102 | base += "/" + target.getName(); |
| 103 | } |
| 104 | zip.putNextEntry(new ZipEntry(base)); |
| 105 | FileInputStream in = new FileInputStream(target); |
| 106 | try { |
| 107 | IOUtils.write(in, zip); |
| 108 | } finally { |
| 109 | in.close(); |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Zip the given source into dest. |
| 116 | * |
| 117 | * @param src |
| 118 | * the source {@link File} (which can be a directory) |
| 119 | * @param dest |
| 120 | * the destination <tt>.zip</tt> file |
| 121 | * @param srctIsRoot |
| 122 | * FALSE if we need to add a {@link ZipEntry} for src, TRUE to |
| 123 | * add it at the root of the ZIP |
| 124 | * |
| 125 | * @throws IOException |
| 126 | * in case of I/O error |
| 127 | */ |
| 128 | public static void zip(File src, File dest, boolean srcIsRoot) |
| 129 | throws IOException { |
| 130 | OutputStream out = new FileOutputStream(dest); |
| 131 | try { |
| 132 | ZipOutputStream zip = new ZipOutputStream(out); |
| 133 | try { |
| 134 | IOUtils.zip(zip, "", src, srcIsRoot); |
| 135 | } finally { |
| 136 | zip.close(); |
| 137 | } |
| 138 | } finally { |
| 139 | out.close(); |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * Write the {@link String} content to {@link File}. |
| 145 | * |
| 146 | * @param dir |
| 147 | * the directory where to write the {@link File} |
| 148 | * @param filename |
| 149 | * the {@link File} name |
| 150 | * @param content |
| 151 | * the content |
| 152 | * |
| 153 | * @throws IOException |
| 154 | * in case of I/O error |
| 155 | */ |
| 156 | public static void writeSmallFile(File dir, String filename, String content) |
| 157 | throws IOException { |
| 158 | if (!dir.exists()) { |
| 159 | dir.mkdirs(); |
| 160 | } |
| 161 | |
| 162 | FileWriter writerVersion = new FileWriter(new File(dir, filename)); |
| 163 | try { |
| 164 | writerVersion.write(content); |
| 165 | } finally { |
| 166 | writerVersion.close(); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * Read the whole {@link File} content into a {@link String}. |
| 172 | * |
| 173 | * @param file |
| 174 | * the {@link File} |
| 175 | * |
| 176 | * @return the content |
| 177 | * |
| 178 | * @throws IOException |
| 179 | * in case of I/O error |
| 180 | */ |
| 181 | public static String readSmallFile(File file) throws IOException { |
| 182 | BufferedReader reader = new BufferedReader(new FileReader(file)); |
| 183 | try { |
| 184 | StringBuilder builder = new StringBuilder(); |
| 185 | for (String line = reader.readLine(); line != null; line = reader |
| 186 | .readLine()) { |
| 187 | builder.append(line); |
| 188 | } |
| 189 | return builder.toString(); |
| 190 | } finally { |
| 191 | reader.close(); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | /** |
| 196 | * Recursively delete the given {@link File}, which may of course also be a |
| 197 | * directory. |
| 198 | * <p> |
| 199 | * Will silently continue in case of error. |
| 200 | * |
| 201 | * @param target |
| 202 | * the target to delete |
| 203 | */ |
| 204 | public static void deltree(File target) { |
| 205 | for (File file : target.listFiles()) { |
| 206 | if (file.isDirectory()) { |
| 207 | deltree(file); |
| 208 | } else { |
| 209 | if (!file.delete()) { |
| 210 | System.err.println("Cannot delete file: " |
| 211 | + file.getAbsolutePath()); |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | if (!target.delete()) { |
| 217 | System.err.println("Cannot delete file: " |
| 218 | + target.getAbsolutePath()); |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Convert the given {@link InputStream} (which should allow calls to |
| 224 | * {@link InputStream#reset() for better perfs}) into an {@link Image} |
| 225 | * object, respecting the EXIF transformations if any. |
| 226 | * |
| 227 | * @param in |
| 228 | * the 'resetable' {@link InputStream} |
| 229 | * |
| 230 | * @return the {@link Image} object |
| 231 | * |
| 232 | * @throws IOException |
| 233 | * in case of IO error |
| 234 | */ |
| 235 | public static BufferedImage toImage(InputStream in) throws IOException { |
| 236 | MarkableFileInputStream tmpIn = null; |
| 237 | File tmp = null; |
| 238 | try { |
| 239 | in.reset(); |
| 240 | } catch (IOException e) { |
| 241 | tmp = File.createTempFile("fanfic-tmp-image", ".tmp"); |
| 242 | tmp.deleteOnExit(); |
| 243 | IOUtils.write(in, tmp); |
| 244 | tmpIn = new MarkableFileInputStream(new FileInputStream(tmp)); |
| 245 | } |
| 246 | |
| 247 | int orientation; |
| 248 | try { |
| 249 | orientation = getExifTransorm(in); |
| 250 | } catch (Exception e) { |
| 251 | // no EXIF transform, ok |
| 252 | orientation = -1; |
| 253 | } |
| 254 | |
| 255 | in.reset(); |
| 256 | BufferedImage image = ImageIO.read(in); |
| 257 | |
| 258 | if (image == null) { |
| 259 | if (tmp != null) { |
| 260 | tmp.delete(); |
| 261 | tmpIn.close(); |
| 262 | } |
| 263 | throw new IOException("Failed to convert input to image"); |
| 264 | } |
| 265 | |
| 266 | // Note: this code has been found on internet; |
| 267 | // thank you anonymous coder. |
| 268 | int width = image.getWidth(); |
| 269 | int height = image.getHeight(); |
| 270 | AffineTransform affineTransform = new AffineTransform(); |
| 271 | |
| 272 | switch (orientation) { |
| 273 | case 1: |
| 274 | affineTransform = null; |
| 275 | break; |
| 276 | case 2: // Flip X |
| 277 | affineTransform.scale(-1.0, 1.0); |
| 278 | affineTransform.translate(-width, 0); |
| 279 | break; |
| 280 | case 3: // PI rotation |
| 281 | affineTransform.translate(width, height); |
| 282 | affineTransform.rotate(Math.PI); |
| 283 | break; |
| 284 | case 4: // Flip Y |
| 285 | affineTransform.scale(1.0, -1.0); |
| 286 | affineTransform.translate(0, -height); |
| 287 | break; |
| 288 | case 5: // - PI/2 and Flip X |
| 289 | affineTransform.rotate(-Math.PI / 2); |
| 290 | affineTransform.scale(-1.0, 1.0); |
| 291 | break; |
| 292 | case 6: // -PI/2 and -width |
| 293 | affineTransform.translate(height, 0); |
| 294 | affineTransform.rotate(Math.PI / 2); |
| 295 | break; |
| 296 | case 7: // PI/2 and Flip |
| 297 | affineTransform.scale(-1.0, 1.0); |
| 298 | affineTransform.translate(-height, 0); |
| 299 | affineTransform.translate(0, width); |
| 300 | affineTransform.rotate(3 * Math.PI / 2); |
| 301 | break; |
| 302 | case 8: // PI / 2 |
| 303 | affineTransform.translate(0, width); |
| 304 | affineTransform.rotate(3 * Math.PI / 2); |
| 305 | break; |
| 306 | default: |
| 307 | affineTransform = null; |
| 308 | break; |
| 309 | } |
| 310 | |
| 311 | if (affineTransform != null) { |
| 312 | AffineTransformOp affineTransformOp = new AffineTransformOp( |
| 313 | affineTransform, AffineTransformOp.TYPE_BILINEAR); |
| 314 | |
| 315 | BufferedImage transformedImage = new BufferedImage(width, height, |
| 316 | image.getType()); |
| 317 | transformedImage = affineTransformOp |
| 318 | .filter(image, transformedImage); |
| 319 | |
| 320 | image = transformedImage; |
| 321 | } |
| 322 | // |
| 323 | |
| 324 | if (tmp != null) { |
| 325 | tmp.delete(); |
| 326 | tmpIn.close(); |
| 327 | } |
| 328 | |
| 329 | return image; |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * Open the given /-separated resource (from the binary root). |
| 334 | * |
| 335 | * @param name |
| 336 | * the resource name |
| 337 | * |
| 338 | * @return the opened resource if found, NLL if not |
| 339 | */ |
| 340 | public static InputStream openResource(String name) { |
| 341 | ClassLoader loader = IOUtils.class.getClassLoader(); |
| 342 | if (loader == null) { |
| 343 | loader = ClassLoader.getSystemClassLoader(); |
| 344 | } |
| 345 | |
| 346 | return loader.getResourceAsStream(name); |
| 347 | } |
| 348 | |
| 349 | /** |
| 350 | * Return the EXIF transformation flag of this image if any. |
| 351 | * |
| 352 | * <p> |
| 353 | * Note: this code has been found on internet; thank you anonymous coder. |
| 354 | * </p> |
| 355 | * |
| 356 | * @param in |
| 357 | * the data {@link InputStream} |
| 358 | * |
| 359 | * @return the transformation flag if any |
| 360 | * |
| 361 | * @throws IOException |
| 362 | * in case of IO error |
| 363 | */ |
| 364 | private static int getExifTransorm(InputStream in) throws IOException { |
| 365 | int[] exif_data = new int[100]; |
| 366 | int set_flag = 0; |
| 367 | int is_motorola = 0; |
| 368 | |
| 369 | /* Read File head, check for JPEG SOI + Exif APP1 */ |
| 370 | for (int i = 0; i < 4; i++) |
| 371 | exif_data[i] = in.read(); |
| 372 | |
| 373 | if (exif_data[0] != 0xFF || exif_data[1] != 0xD8 |
| 374 | || exif_data[2] != 0xFF || exif_data[3] != 0xE1) |
| 375 | return -2; |
| 376 | |
| 377 | /* Get the marker parameter length count */ |
| 378 | int length = (in.read() << 8 | in.read()); |
| 379 | |
| 380 | /* Length includes itself, so must be at least 2 */ |
| 381 | /* Following Exif data length must be at least 6 */ |
| 382 | if (length < 8) |
| 383 | return -1; |
| 384 | length -= 8; |
| 385 | /* Read Exif head, check for "Exif" */ |
| 386 | for (int i = 0; i < 6; i++) |
| 387 | exif_data[i] = in.read(); |
| 388 | |
| 389 | if (exif_data[0] != 0x45 || exif_data[1] != 0x78 |
| 390 | || exif_data[2] != 0x69 || exif_data[3] != 0x66 |
| 391 | || exif_data[4] != 0 || exif_data[5] != 0) |
| 392 | return -1; |
| 393 | |
| 394 | /* Read Exif body */ |
| 395 | length = length > exif_data.length ? exif_data.length : length; |
| 396 | for (int i = 0; i < length; i++) |
| 397 | exif_data[i] = in.read(); |
| 398 | |
| 399 | if (length < 12) |
| 400 | return -1; /* Length of an IFD entry */ |
| 401 | |
| 402 | /* Discover byte order */ |
| 403 | if (exif_data[0] == 0x49 && exif_data[1] == 0x49) |
| 404 | is_motorola = 0; |
| 405 | else if (exif_data[0] == 0x4D && exif_data[1] == 0x4D) |
| 406 | is_motorola = 1; |
| 407 | else |
| 408 | return -1; |
| 409 | |
| 410 | /* Check Tag Mark */ |
| 411 | if (is_motorola == 1) { |
| 412 | if (exif_data[2] != 0) |
| 413 | return -1; |
| 414 | if (exif_data[3] != 0x2A) |
| 415 | return -1; |
| 416 | } else { |
| 417 | if (exif_data[3] != 0) |
| 418 | return -1; |
| 419 | if (exif_data[2] != 0x2A) |
| 420 | return -1; |
| 421 | } |
| 422 | |
| 423 | /* Get first IFD offset (offset to IFD0) */ |
| 424 | int offset; |
| 425 | if (is_motorola == 1) { |
| 426 | if (exif_data[4] != 0) |
| 427 | return -1; |
| 428 | if (exif_data[5] != 0) |
| 429 | return -1; |
| 430 | offset = exif_data[6]; |
| 431 | offset <<= 8; |
| 432 | offset += exif_data[7]; |
| 433 | } else { |
| 434 | if (exif_data[7] != 0) |
| 435 | return -1; |
| 436 | if (exif_data[6] != 0) |
| 437 | return -1; |
| 438 | offset = exif_data[5]; |
| 439 | offset <<= 8; |
| 440 | offset += exif_data[4]; |
| 441 | } |
| 442 | if (offset > length - 2) |
| 443 | return -1; /* check end of data segment */ |
| 444 | |
| 445 | /* Get the number of directory entries contained in this IFD */ |
| 446 | int number_of_tags; |
| 447 | if (is_motorola == 1) { |
| 448 | number_of_tags = exif_data[offset]; |
| 449 | number_of_tags <<= 8; |
| 450 | number_of_tags += exif_data[offset + 1]; |
| 451 | } else { |
| 452 | number_of_tags = exif_data[offset + 1]; |
| 453 | number_of_tags <<= 8; |
| 454 | number_of_tags += exif_data[offset]; |
| 455 | } |
| 456 | if (number_of_tags == 0) |
| 457 | return -1; |
| 458 | offset += 2; |
| 459 | |
| 460 | /* Search for Orientation Tag in IFD0 */ |
| 461 | for (;;) { |
| 462 | if (offset > length - 12) |
| 463 | return -1; /* check end of data segment */ |
| 464 | /* Get Tag number */ |
| 465 | int tagnum; |
| 466 | if (is_motorola == 1) { |
| 467 | tagnum = exif_data[offset]; |
| 468 | tagnum <<= 8; |
| 469 | tagnum += exif_data[offset + 1]; |
| 470 | } else { |
| 471 | tagnum = exif_data[offset + 1]; |
| 472 | tagnum <<= 8; |
| 473 | tagnum += exif_data[offset]; |
| 474 | } |
| 475 | if (tagnum == 0x0112) |
| 476 | break; /* found Orientation Tag */ |
| 477 | if (--number_of_tags == 0) |
| 478 | return -1; |
| 479 | offset += 12; |
| 480 | } |
| 481 | |
| 482 | /* Get the Orientation value */ |
| 483 | if (is_motorola == 1) { |
| 484 | if (exif_data[offset + 8] != 0) |
| 485 | return -1; |
| 486 | set_flag = exif_data[offset + 9]; |
| 487 | } else { |
| 488 | if (exif_data[offset + 9] != 0) |
| 489 | return -1; |
| 490 | set_flag = exif_data[offset + 8]; |
| 491 | } |
| 492 | if (set_flag > 8) |
| 493 | return -1; |
| 494 | |
| 495 | return set_flag; |
| 496 | } |
| 497 | } |