var $exiftool = '/petabox/sw/books/exiftool/exiftool';
var $kduExpand = '/petabox/sw/bin/kdu_expand';
+ /*
+ * Serve an image request that requires looking up the book metadata
+ *
+ * Code path:
+ * - Get book metadata
+ * - Parse the requested page (e.g. cover_t.jpg, n5_r4.jpg) to determine which page type,
+ * size and format (etc) is being requested
+ * - Determine the leaf number corresponding to the page
+ * - Determine scaling values
+ * - Serve image request now that all information has been gathered
+ */
+
+ function serveLookupRequest($requestEnv) {
+ $brm = new BookReaderMeta();
+ try {
+ $metadata = $brm->buildMetadata($_REQUEST['id'], $_REQUEST['itemPath'], $_REQUEST['subPrefix'], $_REQUEST['server']);
+ } catch (Exception $e) {
+ $this->BRfatal($e->getMessage);
+ }
+
+ $page = $_REQUEST['page'];
+
+ // Index of image to return
+ $imageIndex = null;
+
+ // XXX deal with subPrefix
+ $pageInfo = $this->parsePageRequest($page);
+
+ // Parse requested page for page type, size and format options
+ if (preg_match('#^([^_]+)#', $page, $matches) === 0) {
+ // Unrecognized page specifier
+ $this->BRfatal('Unrecognized page specifier');
+ }
+ $basePage = $matches[1];
+
+ switch ($basePage) {
+ case 'title':
+ if (! array_key_exists('titleIndex', $metadata)) {
+ $this->BRfatal("No title page asserted in book");
+ }
+ $imageIndex = $metadata['titleIndex'];
+ break;
+
+ case 'cover':
+ if (! array_key_exists('coverIndices', $metadata)) {
+ $this->BRfatal("No cover asserted in book");
+ }
+ $imageIndex = $metadata['coverIndices'][0]; // $$$ TODO add support for other covers
+ break;
+
+ case 'preview':
+ // Preference is:
+ // Cover page if book was published >= 1950
+ // Title page
+ // Cover page
+ // Page 0
+
+ if ( array_key_exists('date', $metadata) && array_key_exists('coverIndices', $metadata) ) {
+ if ($brm->parseYear($metadata['date']) >= 1950) {
+ $imageIndex = $metadata['coverIndices'][0];
+ break;
+ }
+ }
+ if (array_key_exists('titleIndex', $metadata)) {
+ $imageIndex = $metadata['titleIndex'];
+ break;
+ }
+ if (array_key_exists('coverIndices', $metadata)) {
+ $imageIndex = $metadata['coverIndices'][0];
+ break;
+ }
+
+ // First page
+ $imageIndex = 0;
+ break;
+
+ default:
+ // Shouldn't be possible
+ $this->BRfatal("Couldn't find page");
+ break;
+
+ }
+
+ $leaf = $brm->leafForIndex($imageIndex, $metadata['leafNums']);
+
+ $requestEnv = array(
+ 'zip' => $metadata['zip'],
+ 'file' => $brm->imageFilePath($leaf, $metadata['subPrefix'], $metadata['imageFormat']),
+ 'ext' => 'jpg',
+ );
+
+ // Return image data - will check privs
+ $this->serveRequest($requestEnv);
+
+ }
+
/*
* Returns a page image when all parameters such as the image stack location are
* passed in.
return strlen($binStr) - 1;
}
+ /*
+ * Parses a page request like "page5_r2.jpg" or "cover_t.jpg" to corresponding
+ * page type, size, reduce, and format
+ */
+ function parsePageRequest($pageRequest, $bookPrefix) {
+
+ $pageInfo = array();
+
+ // Pull off extension
+ if (preg_match('#(.*)\.([^.]+)$#', $pageRequest, $matches) === 1) {
+ $pageRequest = $matches[1];
+ $extension = $matches[2];
+ if ($extension == 'jpeg') {
+ $extension = 'jpg';
+ }
+ } else {
+ $extension = 'jpg';
+ }
+ $pageInfo['extension'] = $extension;
+
+ // Split parts out
+ $parts = explode('_', $pageRequest);
+
+ // Remove book prefix if it was included (historical)
+ if ($parts[0] == $bookPrefix) {
+ array_shift($parts);
+ }
+
+ if (count($parts) === 0) {
+ $this->BRfatal('No page type specified');
+ }
+ $page = array_shift($parts);
+
+ $pageTypes = array(
+ 'page' => 'str',
+ 'n' => 'num',
+ 'cover' => 'single',
+ 'preview' => 'single',
+ 'title' => 'single'
+ );
+
+ // Look for known page types
+ foreach ( $pageTypes as $pageName => $kind ) {
+ if ( preg_match('#^(' . $pageName . ')(.*)#', $page, $matches) === 1 ) {
+ $pageInfo['type'] = $matches[1];
+ switch ($kind) {
+ case 'str':
+ $pageInfo['value'] = $matches[2];
+ break;
+ case 'num':
+ $pageInfo['value'] = intval($matches[2]);
+ break;
+ case 'single':
+ break;
+ }
+ }
+ }
+
+ if ( !array_key_exists('type', $pageInfo) ) {
+ $this->BRfatal('Unrecognized page type');
+ }
+
+ // Look for other known parts
+ foreach ($parts as $part) {
+ $start = substr($part, 0, 1);
+
+ switch ($start) {
+ case 't':
+ $pageInfo['size'] = $start;
+ break;
+ case 'r':
+ $pageInfo['reduce'] = substr($part, 0);
+ break;
+ default:
+ // Unrecognized... just let it pass
+ break;
+ }
+ }
+
+ return $pageInfo;
+ }
+
}
?>
\ No newline at end of file
switch ($operator) {
case 'page':
- // Find bookId and which page was requested
- $pathParts = pathinfo($filename);
// Look for old-style preview request
// $$$ currently ignoring file extension
- if (preg_match('/^(.*)_(cover|title|preview)/', $filename, $matches) === 0) {
- return null;
+ if (preg_match('/^(.*)_(cover|title|preview)/', $filename, $matches) === 1) {
+ // Serve preview image
+ $page = $matches[2];
+ $query['page'] = $page;
+ return 'http://' . $serverBaseURL . '/BookReader/BookReaderPreview.php?' . http_build_query($query, '', '&');
}
- $page = $matches[2];
- $query['page'] = $page;
-
- return 'http://' . $serverBaseURL . '/BookReader/BookReaderPreview.php?' . http_build_query($query, '', '&');
+ // Asking for a non-preview page
+ $query['page'] = $filename;
+ return 'http://' . $serverBaseURL . '/BookReader/BookReaderImages.php?' . http_build_query($query, '', '&');
default:
// Unknown operator
--- /dev/null
+<?php
+
+/*
+Copyright(c) 2010 Internet Archive. Software license AGPL version 3.
+
+This file is part of BookReader. The full source code can be found at GitHub:
+http://github.com/openlibrary/bookreader
+
+Author:
+ Michael Ang <http://github.com/mangtronix>
+
+ BookReader is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ BookReader is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with BookReader. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+require_once('../datanode/BookReaderImages.inc.php');
+
+try {
+ switch ($_REQUEST['test']) {
+ case 'pageparse':
+ $bri = new BookReaderImages();
+ ok('text/javascript');
+ print( json_encode($bri->parsePageRequest($_REQUEST['value'], $_REQUEST['bookPrefix'])) );
+ break;
+
+ default:
+ ok('text/html');
+ print "<html><head><title>BookReader Tests</title></head>";
+ print "<body>";
+ print "<h1>Available tests</h1>";
+ print "<pre>";
+ print "<a href='BookReaderTest.php?test=pageparse&value=cover_r4.jpg'>pageparse</a> value bookPrefix";
+ print "</body>";
+ print "</html>";
+ break;
+ }
+
+} catch (Exception $e) {
+ print "Error serving request:\n";
+ print " " . $e->getMessage() . "\n\n";
+ print "Debugging information:\n";
+ echo $e->getTraceAsString();
+}
+
+function ok($type) {
+ header('HTTP/1.0 200 OK');
+ header('Content-type: ' . $type);
+}
+
+?>
\ No newline at end of file
projects / bookreader.git / commitdiff