52 lines
2.1 KiB
PHP
52 lines
2.1 KiB
PHP
<?php
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/** \versioned_assets.php
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* \Copyright 2017-2021 Said Achmiz
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* \Licensed under the MIT License
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* \brief Adds versions (modification timestamps) to attachment URLs, so that browser
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* caches invalidate properly when attachments are updated.
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*/
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$RecipeInfo['VersionedAssets']['Version'] = '2017-12-13';
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global $LinkFunctions;
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$LinkFunctions['Attach:'] = 'LinkUploadVersioned';
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SDV($VersionedAssetsReattachFileExtension, true);
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function LinkUploadVersioned($pagename, $imap, $path, $alt, $txt, $fmt=NULL) {
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global $FmtV, $UploadFileFmt, $LinkUploadCreateFmt,
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$UploadUrlFmt, $UploadPrefixFmt, $EnableDirectDownload;
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if (preg_match('!^(.*)/([^/]+)$!', $path, $match)) {
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$pagename = MakePageName($pagename, $match[1]);
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$path = $match[2];
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}
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$upname = MakeUploadName($pagename, $path);
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$encname = rawurlencode($upname);
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$filepath = FmtPageName("$UploadFileFmt/$upname", $pagename);
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$FmtV['$LinkUpload'] =
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FmtPageName("\$PageUrl?action=upload&upname=$encname", $pagename);
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$FmtV['$LinkText'] = $txt;
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if (!file_exists($filepath))
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return FmtPageName($LinkUploadCreateFmt, $pagename);
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$path = PUE(FmtPageName(IsEnabled($EnableDirectDownload, 1)
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? "$UploadUrlFmt$UploadPrefixFmt/$encname"
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: "{\$PageUrl}?action=download&upname=$encname",
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$pagename));
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## Append the modification time to the URL as a GET parameter; this should be ignored
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## by the web server, but is seen as part of the unique URL of the remote resource by
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## the browser; when it changes (because the attachment has been modified), the
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## browser will see that it doesn’t have a cached version of the resource under the
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## new URL, and will retrieve the updated version.
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$versioned_path = $path . "?v=" . filemtime($filepath);
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global $VersionedAssetsReattachFileExtension;
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if ($VersionedAssetsReattachFileExtension == true) {
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## Re-attach the file extension, so that LinkIcons and such things work properly.
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preg_match("/\\.[^\\.]+$/", $path, $matches);
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$versioned_path .= $matches[0];
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}
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return LinkIMap($pagename, $imap, $versioned_path, $alt, $txt, $fmt);
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}
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