along with BookReader. If not, see <http://www.gnu.org/licenses/>.
*/
-$MIMES = array('gif' => 'image/gif',
- 'jp2' => 'image/jp2',
- 'jpg' => 'image/jpeg',
- 'jpeg' => 'image/jpeg',
- 'png' => 'image/png',
- 'tif' => 'image/tiff',
- 'tiff' => 'image/tiff');
-
-$EXTENSIONS = array('gif' => 'gif',
- 'jp2' => 'jp2',
- 'jpeg' => 'jpeg',
- 'jpg' => 'jpeg',
- 'png' => 'png',
- 'tif' => 'tiff',
- 'tiff' => 'tiff');
-
-$exiftool = '/petabox/sw/books/exiftool/exiftool';
-
-// Process some of the request parameters
-$zipPath = $_REQUEST['zip'];
-$file = $_REQUEST['file'];
-if (isset($_REQUEST['ext'])) {
- $ext = $_REQUEST['ext'];
-} else {
- // Default to jpg
- $ext = 'jpeg';
-}
-if (isset($_REQUEST['callback'])) {
- // validate callback is valid JS identifier (only)
- $callback = $_REQUEST['callback'];
- $identifierPatt = '/^[[:alpha:]$_]([[:alnum:]$_])*$/';
- if (! preg_match($identifierPatt, $callback)) {
- BRfatal('Invalid callback');
- }
-} else {
- $callback = null;
-}
-
-/*
- * Approach:
- *
- * Get info about requested image (input)
- * Get info about requested output format
- * Determine processing parameters
- * Process image
- * Return image data
- * Clean up temporary files
- */
-
-function getUnarchiveCommand($archivePath, $file)
-{
- $lowerPath = strtolower($archivePath);
- if (preg_match('/\.([^\.]+)$/', $lowerPath, $matches)) {
- $suffix = $matches[1];
-
- if ($suffix == 'zip') {
- return 'unzip -p '
- . escapeshellarg($archivePath)
- . ' ' . escapeshellarg($file);
- } else if ($suffix == 'tar') {
- return '7z e -so '
- . escapeshellarg($archivePath)
- . ' ' . escapeshellarg($file);
- } else {
- BRfatal('Incompatible archive format');
- }
-
- } else {
- BRfatal('Bad image stack path');
- }
-
- BRfatal('Bad image stack path or archive format');
-
-}
-
-/*
- * Returns the image type associated with the file extension.
- */
-function imageExtensionToType($extension)
-{
- global $EXTENSIONS;
-
- if (array_key_exists($extension, $EXTENSIONS)) {
- return $EXTENSIONS[$extension];
- } else {
- BRfatal('Unknown image extension');
- }
-}
-
-/*
- * Get the image width, height and depth from a jp2 file in zip.
- */
-function getImageInfo($zipPath, $file)
-{
- global $exiftool;
-
- $fileExt = strtolower(pathinfo($file, PATHINFO_EXTENSION));
- $type = imageExtensionToType($fileExt);
-
- // We look for all the possible tags of interest then act on the
- // ones presumed present based on the file type
- $tagsToGet = ' -ImageWidth -ImageHeight -FileType' // all formats
- . ' -BitsPerComponent -ColorSpace' // jp2
- . ' -BitDepth' // png
- . ' -BitsPerSample'; // tiff
-
- $cmd = getUnarchiveCommand($zipPath, $file)
- . ' | '. $exiftool . ' -S -fast' . $tagsToGet . ' -';
- exec($cmd, $output);
-
- $tags = Array();
- foreach ($output as $line) {
- $keyValue = explode(": ", $line);
- $tags[$keyValue[0]] = $keyValue[1];
- }
-
- $width = intval($tags["ImageWidth"]);
- $height = intval($tags["ImageHeight"]);
- $type = strtolower($tags["FileType"]);
-
- switch ($type) {
- case "jp2":
- $bits = intval($tags["BitsPerComponent"]);
- break;
- case "tiff":
- $bits = intval($tags["BitsPerSample"]);
- break;
- case "jpeg":
- $bits = 8;
- break;
- case "png":
- $bits = intval($tags["BitDepth"]);
- break;
- default:
- BRfatal("Unsupported image type");
- break;
- }
-
-
- $retval = Array('width' => $width, 'height' => $height,
- 'bits' => $bits, 'type' => $type);
-
- return $retval;
-}
-
-/*
- * Output JSON given the imageInfo associative array
- */
-function outputJSON($imageInfo, $callback)
-{
- header('Content-type: text/plain');
- $jsonOutput = json_encode($imageInfo);
- if ($callback) {
- $jsonOutput = $callback . '(' . $jsonOutput . ');';
- }
- echo $jsonOutput;
-}
-
-// Get the image size and depth
-$imageInfo = getImageInfo($zipPath, $file);
-
-// Output json if requested
-if ('json' == $ext) {
- // $$$ we should determine the output size first based on requested scale
- outputJSON($imageInfo, $callback);
- exit;
-}
-
-// Unfortunately kakadu requires us to know a priori if the
-// output file should be .ppm or .pgm. By decompressing to
-// .bmp kakadu will write a file we can consistently turn into
-// .pnm. Really kakadu should support .pnm as the file output
-// extension and automatically write ppm or pgm format as
-// appropriate.
-$decompressToBmp = true;
-if ($decompressToBmp) {
- $stdoutLink = '/tmp/stdout.bmp';
-} else {
- $stdoutLink = '/tmp/stdout.ppm';
-}
-
-$fileExt = strtolower(pathinfo($file, PATHINFO_EXTENSION));
-
-// Rotate is currently only supported for jp2 since it does not add server load
-$allowedRotations = array("0", "90", "180", "270");
-$rotate = $_REQUEST['rotate'];
-if ( !in_array($rotate, $allowedRotations) ) {
- $rotate = "0";
-}
-
-// Image conversion options
-$pngOptions = '';
-$jpegOptions = '-quality 75';
-
-// The pbmreduce reduction factor produces an image with dimension 1/n
-// The kakadu reduction factor produceds an image with dimension 1/(2^n)
-// $$$ handle continuous values for scale
-if (isset($_REQUEST['height'])) {
- $ratio = floatval($_REQUEST['origHeight']) / floatval($_REQUEST['height']);
- if ($ratio <= 2) {
- $scale = 2;
- $powReduce = 1;
- } else if ($ratio <= 4) {
- $scale = 4;
- $powReduce = 2;
- } else {
- //$powReduce = 3; //too blurry!
- $scale = 2;
- $powReduce = 1;
- }
-
-} else {
- $scale = $_REQUEST['scale'];
- if (1 >= $scale) {
- $scale = 1;
- $powReduce = 0;
- } else if (2 == $scale) {
- $powReduce = 1;
- } else if (4 == $scale) {
- $powReduce = 2;
- } else if (8 == $scale) {
- $powReduce = 3;
- } else if (16 == $scale) {
- $powReduce = 4;
- } else if (32 == $scale) {
- $powReduce = 5;
+// Include BookReaderImages class definition
+require_once('BookReaderImages.inc.php');
+
+// Serve request
+$bri = new BookReaderImages();
+try {
+ if ($_REQUEST['page']) {
+ // Need to lookup metadata
+ $bri->serveLookupRequest($_REQUEST);
} else {
- // $$$ Leaving this in as default though I'm not sure why it is...
- $scale = 8;
- $powReduce = 3;
+ // Request should be fully qualified - no lookup needed
+ $bri->serveRequest($_REQUEST);
}
-}
-
-// Override depending on source image format
-// $$$ consider doing a 302 here instead, to make better use of the browser cache
-// Limit scaling for 1-bit images. See https://bugs.edge.launchpad.net/bookreader/+bug/486011
-if (1 == $imageInfo['bits']) {
- if ($scale > 1) {
- $scale /= 2;
- $powReduce -= 1;
-
- // Hard limit so there are some black pixels to use!
- if ($scale > 4) {
- $scale = 4;
- $powReduce = 2;
- }
- }
-}
-
-if (!file_exists($stdoutLink))
-{
- system('ln -s /dev/stdout ' . $stdoutLink);
-}
-
-
-putenv('LD_LIBRARY_PATH=/petabox/sw/lib/kakadu');
-
-$unzipCmd = getUnarchiveCommand($zipPath, $file);
-
-switch ($imageInfo['type']) {
- case 'jp2':
- $decompressCmd =
- " | /petabox/sw/bin/kdu_expand -no_seek -quiet -reduce $powReduce -rotate $rotate -i /dev/stdin -o " . $stdoutLink;
- if ($decompressToBmp) {
- $decompressCmd .= ' | bmptopnm ';
- }
- break;
-
- case 'tiff':
- // We need to create a temporary file for tifftopnm since it cannot
- // work on a pipe (the file must be seekable).
- // We use the BookReaderTiff prefix to give a hint in case things don't
- // get cleaned up.
- $tempFile = tempnam("/tmp", "BookReaderTiff");
+} catch (Exception $e) {
+ header("HTTP/1.0 404 Not Found");
+ header("Content-type: text/plain");
- // $$$ look at bit depth when reducing
- $decompressCmd =
- ' > ' . $tempFile . ' ; tifftopnm ' . $tempFile . ' 2>/dev/null' . reduceCommand($scale);
- break;
-
- case 'jpeg':
- $decompressCmd = ' | jpegtopnm ' . reduceCommand($scale);
- break;
-
- case 'png':
- $decompressCmd = ' | pngtopnm ' . reduceCommand($scale);
- break;
-
- default:
- BRfatal('Unknown source file extension: ' . $fileExt);
- break;
-}
-
-// Non-integer scaling is currently disabled on the cluster
-// if (isset($_REQUEST['height'])) {
-// $cmd .= " | pnmscale -height {$_REQUEST['height']} ";
-// }
-
-switch ($ext) {
- case 'png':
- $compressCmd = ' | pnmtopng ' . $pngOptions;
- break;
-
- case 'jpeg':
- case 'jpg':
- default:
- $compressCmd = ' | pnmtojpeg ' . $jpegOptions;
- $ext = 'jpeg'; // for matching below
- break;
-
+ print "Error serving request:\n";
+ print " " . $e->getMessage() . "\n\n";
+ print "Debugging information:\n";
+ echo $e->getTraceAsString();
}
-if (($ext == $fileExt) && ($scale == 1) && ($rotate === "0")) {
- // Just pass through original data if same format and size
- $cmd = $unzipCmd;
-} else {
- $cmd = $unzipCmd . $decompressCmd . $compressCmd;
-}
-
-# print $cmd;
-
-
-// $$$ investigate how to flush cache when this file is changed
-header('Content-type: ' . $MIMES[$ext]);
-header('Cache-Control: max-age=15552000');
-passthru ($cmd); # cmd returns image data
-
-if (isset($tempFile)) {
- unlink($tempFile);
-}
-
-function BRFatal($string) {
- echo "alert('$string');\n";
- die(-1);
-}
-
-// Returns true if using a power node
-function onPowerNode() {
- exec("lspci | fgrep -c Realtek", $output, $return);
- if ("0" != $output[0]) {
- return true;
- } else {
- exec("egrep -q AMD /proc/cpuinfo", $output, $return);
- if ($return == 0) {
- return true;
- }
- }
- return false;
-}
-
-function reduceCommand($scale) {
- if (1 != $scale) {
- if (onPowerNode()) {
- return ' | pnmscale -reduce ' . $scale;
- } else {
- return ' | pnmscale -nomix -reduce ' . $scale;
- }
- } else {
- return '';
- }
-}
-
-
-?>
-
+?>
\ No newline at end of file
projects / bookreader.git / blobdiff