wikimedia/mediawiki-extensions-PdfHandler
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Store original media dimensions as additional header

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For storage repos that support headers (such as Swift), this will store the original
media dimensions as an extra custom header, X-Content-Dimensions.
The header is formatted to minimize its length when dealing with multipage
documents, by expressing the information as page ranges keyed by dimensions.

Example for a multipage documents with some pages of different sizes:
X-Content-Dimensions: 1903x899:1-9,11/1903x873:10

Example for a single page document:
X-Content-Dimensions: 800x600:1

Bug: T150741
Change-Id: If4c58ad7048c8233ef2b0f64a252c16f84dcecde
Depends-On: Ic4c6a86557b3705cf75d074753e9ce2ee070a6df
This commit is contained in:
Gilles Dubuc 2017-05-04 10:39:53 +02:00 committed by Aaron Schulz
parent 6766ffc58b
commit b8699d160b
1 changed files with 24 additions and 0 deletions
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24
PdfHandler_body.php
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@ -433,4 +433,28 @@ class PdfHandler extends ImageHandler {
'messages' => array_values( self::$messages ),
) );
}
/**
* Get useful response headers for GET/HEAD requests for a file with the given metadata
* @param $metadata Array Contains this handler's unserialized getMetadata() for a file
* @return array
*/
public function getContentHeaders( $metadata ) {
$pagesByDimensions = [];
$count = intval( $metadata['Pages'] );
for ( $i = 1; $i <= $count; $i++ ) {
$dimensions = PdfImage::getPageSize( $metadata, $i );
$dimensionString = $dimensions['width'] . 'x' . $dimensions['height'];
if ( isset ( $pagesByDimensions[ $dimensionString ] ) ) {
$pagesByDimensions[ $dimensionString ][] = $i;
} else {
$pagesByDimensions[ $dimensionString ] = [ $i ];
}
}
$pageRangesByDimensions = MediaHandler::getPageRangesByDimensions( $pagesByDimensions );
return [ 'X-Content-Dimensions' => $pageRangesByDimensions ];
}
}