along with BookReader. If not, see <http://www.gnu.org/licenses/>.
*/
-// Builds metadata object (to be encoded as JSON)
-function buildMetadata() {
- $id = $_REQUEST['id'];
- $itemPath = $_REQUEST['itemPath'];
- $subPrefix = $_REQUEST['subPrefix'];
- $server = $_REQUEST['server'];
-
- // Check if we're on a dev vhost and point to JSIA in the user's public_html on the datanode
- // $$$ TODO consolidate this logic
- if (strpos($_SERVER["REQUEST_URI"], "/~mang") === 0) { // Serving out of home dir
- $server .= ':80/~mang';
- } else if (strpos($_SERVER["REQUEST_URI"], "/~testflip") === 0) { // Serving out of home dir
- $server .= ':80/~testflip';
- }
+require_once('BookReaderMeta.inc.php');
- $response = array();
-
- if (! $subPrefix) {
- $subPrefix = $id;
- }
- $subItemPath = $itemPath . '/' . $subPrefix;
-
- if ("" == $id) {
- BRFatal("No identifier specified!");
- }
-
- if ("" == $itemPath) {
- BRFatal("No itemPath specified!");
- }
-
- if ("" == $server) {
- BRFatal("No server specified!");
- }
-
- if (!preg_match("|^/\d+/items/{$id}$|", $itemPath)) {
- BRFatal("Bad id!");
- }
-
- // XXX check here that subitem is okay
-
- $filesDataFile = "$itemPath/${id}_files.xml";
-
- if (file_exists($filesDataFile)) {
- $filesData = simplexml_load_file("$itemPath/${id}_files.xml");
- } else {
- BRfatal("File metadata not found!");
- }
-
- $imageStackInfo = findImageStack($subPrefix, $filesData);
- if ($imageStackInfo['imageFormat'] == 'unknown') {
- BRfatal('Couldn\'t find image stack');
- }
-
- $imageFormat = $imageStackInfo['imageFormat'];
- $archiveFormat = $imageStackInfo['archiveFormat'];
- $imageStackFile = $itemPath . "/" . $imageStackInfo['imageStackFile'];
-
- if ("unknown" == $imageFormat) {
- BRfatal("Unknown image format");
- }
-
- if ("unknown" == $archiveFormat) {
- BRfatal("Unknown archive format");
- }
-
-
- $scanDataFile = "${subItemPath}_scandata.xml";
- $scanDataZip = "$itemPath/scandata.zip";
- if (file_exists($scanDataFile)) {
- $scanData = simplexml_load_file($scanDataFile);
- } else if (file_exists($scanDataZip)) {
- $cmd = 'unzip -p ' . escapeshellarg($scanDataZip) . ' scandata.xml';
- exec($cmd, $output, $retval);
- if ($retval != 0) BRFatal("Could not unzip ScanData!");
-
- $dump = join("\n", $output);
- $scanData = simplexml_load_string($dump);
- } else if (file_exists("$itemPath/scandata.xml")) {
- // For e.g. Scribe v.0 books!
- $scanData = simplexml_load_file("$itemPath/scandata.xml");
- } else {
- BRFatal("ScanData file not found!");
- }
-
- $metaDataFile = "$itemPath/{$id}_meta.xml";
- if (!file_exists($metaDataFile)) {
- BRFatal("MetaData file not found!");
- }
-
-
- $metaData = simplexml_load_file($metaDataFile);
-
- /* Find pages by type */
- $titleLeaf = '';
- $coverLeafs = array();
- foreach ($scanData->pageData->page as $page) {
- if (("Title Page" == $page->pageType) || ("Title" == $page->pageType)) {
- if ('' != $titleLeaf) {
- // not already set
- $titleLeaf = "{$page['leafNum']}";
- }
- }
-
- if (('Cover' == $page->pageType) || ('Cover Page' == $page->pageType)) {
- array_push($coverLeafs, $page['leafNum']);
- }
- }
-
- // These arrays map accessible page index numbers to width, height, scanned leaf numbers
- // and page number strings (NB: these may not be unique)
- $pageWidths = array();
- $pageHeights = array();
- $leafNums = array();
- $i=0;
- $totalHeight = 0;
- foreach ($scanData->pageData->page as $page) {
- if (shouldAddPage($page)) {
- $pageWidths[$i] = intval($page->cropBox->w);
- $pageHeight[$i] = intval($page->cropBox->h);
- $totalHeight += intval($page->cropBox->h/4) + 10;
- $leafNums[$i] = intval($page['leafNum']);
- $pageNums[$i] = $page->pageNumber . '';
- $i++;
- }
- }
-
- # Load some values from meta.xml
- $pageProgression = 'lr'; // default
- if ('' != $metaData->{'page-progression'}) {
- $pageProgression = $metaData->{"page-progression"};
- }
-
- // General metadata
- $response['title'] = $metaData->title . ''; // XXX renamed
- $response['numPages'] = count($pageNums); // XXX renamed
- if ('' != $titleLeaf) {
- $response['titleLeaf'] = $titleLeaf; // XXX change to titleIndex - do leaf mapping here
- $titleIndex = indexForLeaf($titleLeaf, $leafNums);
- if ($titleIndex !== NULL) {
- $response['titleIndex'] = intval($titleIndex);
- }
- }
- $response['url'] = "http://www.archive.org/details/$id";
- $response['pageProgression'] = $pageProgression . '';
- $response['pageWidths'] = $pageWidths;
- $response['pageHeights'] = $pageHeights;
- $response['pageNums'] = $pageNums;
-
- // Internet Archive specific
- $response['itemId'] = $id; // XXX renamed
- $response['bookId'] = $subPrefix; // XXX renamed
- $response['zip'] = $imageStackFile;
- $response['server'] = $server;
- $response['imageFormat'] = $imageFormat;
- $response['archiveFormat'] = $archiveFormat;
- $response['leafNums'] = $leafNums;
-
- // URL to title image
- if ('' != $titleLeaf) {
- $response['titleImage'] = imageURL($titleLeaf, $response);
- }
-
- if (count($coverLeafs) > 0) {
- $coverIndices = array();
- $coverImages = array();
- foreach ($coverLeafs as $key => $leafNum) {
- array_push($coverIndices, indexForLeaf($leafNum, $leafNums));
- array_push($coverImages, imageUrl($leafNum, $response));
- }
-
- $response['coverIndices'] = $coverIndices;
- $response['coverImages'] = $coverImages;
- }
-
- return $response;
-}
+$brm = new BookReaderMeta();
+$brm->processRequest($_REQUEST);
-function emitResponse($metadata) {
- $callback = $_REQUEST['callback'];
-
- $contentType = 'application/json'; // default
- if ($callback) {
- if (! isValidCallback($callback) ) {
- BRfatal("Invalid callback");
- }
- $contentType = 'text/javascript'; // JSONP is not JSON
- }
-
- header('Content-type: ' . $contentType . ';charset=UTF-8');
- header('Access-Control-Allow-Origin: *'); // allow cross-origin requests
-
- if ($callback) {
- print $callback . '( ';
- }
- print json_encode($metadata);
- if ($callback) {
- print ' );';
- }
-}
-
-function BRFatal($string) {
- // $$$ TODO log error
- echo "alert('$string')\n";
- die(-1);
-}
-
-// Returns true if a page should be added based on it's information in
-// the metadata
-function shouldAddPage($page) {
- // Return false only if the page is marked addToAccessFormats false.
- // If there is no assertion we assume it should be added.
- if (isset($page->addToAccessFormats)) {
- if ("false" == strtolower(trim($page->addToAccessFormats))) {
- return false;
- }
- }
-
- return true;
-}
-
-// Returns { 'imageFormat' => , 'archiveFormat' => '} given a sub-item prefix and loaded xml data
-function findImageStack($subPrefix, $filesData) {
-
- // $$$ The order of the image formats determines which will be returned first
- $imageFormats = array('JP2' => 'jp2', 'TIFF' => 'tif', 'JPEG' => 'jpg');
- $archiveFormats = array('ZIP' => 'zip', 'Tar' => 'tar');
- $imageGroup = implode('|', array_keys($imageFormats));
- $archiveGroup = implode('|', array_keys($archiveFormats));
- // $$$ Currently only return processed images
- $imageStackRegex = "/Single Page (Processed) (${imageGroup}) (${archiveGroup})/";
-
- foreach ($filesData->file as $file) {
- if (strpos($file['name'], $subPrefix) === 0) { // subprefix matches beginning
- if (preg_match($imageStackRegex, $file->format, $matches)) {
-
- // Make sure we have a regular image stack
- $imageFormat = $imageFormats[$matches[2]];
- if (strpos($file['name'], $subPrefix . '_' . $imageFormat) === 0) {
- return array('imageFormat' => $imageFormat,
- 'archiveFormat' => $archiveFormats[$matches[3]],
- 'imageStackFile' => $file['name']);
- }
- }
- }
- }
-
- return array('imageFormat' => 'unknown', 'archiveFormat' => 'unknown', 'imageStackFile' => 'unknown');
-}
-
-function isValidCallback($identifier) {
- $pattern = '/^[a-zA-Z_$][a-zA-Z0-9_$]*$/';
- return preg_match($pattern, $identifier) == 1;
-}
-
-function indexForLeaf($leafNum, $leafNums) {
- $key = array_search($leafNum, $leafNums);
- if ($key === FALSE) {
- return NULL;
- } else {
- return $key;
- }
-}
-
-function imageURL($leafNum, $metadata, $scale, $rotate) {
- // "Under the hood", non-public, dynamically changing (achtung!) image URLs currently look like:
- // http://{server}/BookReader/BookReaderImages.php?zip={zipPath}&file={filePath}&scale={scale}&rotate={rotate}
- // e.g. http://ia311213.us.archive.org/BookReader/BookReaderImages.php?zip=/0/items/coloritsapplicat00andriala/coloritsapplicat00andriala_jp2.zip&file=coloritsapplicat00andriala_jp2/coloritsapplicat00andriala_0009.jp2&scale=8&rotate=0
-
-
- $filePath = imageFilePath($leafNum, $metadata['bookId'], $metadata['imageFormat']);
- $url = 'http://' . $metadata['server'] . '/BookReader/BookReaderImages.php?zip=' . $metadata['zip'] . '&file=' . $filePath;
-
- if (defined($scale)) {
- $url .= '&scale=' . $scale;
- }
- if (defined($rotate)) {
- $url .= '&rotate=' . $rotate;
- }
-
- return $url;
-}
-
-function imageFilePath($leafNum, $bookId, $format) {
- return sprintf("%s_%s/%s_%04d.%s", $bookId, $format, $bookId, intval($leafNum), $format);
-}
-
-// Here we go
-emitResponse(buildMetadata());
?>
projects / bookreader.git / blobdiff