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<title>[GlotPress][751] trunk: Added Last-Modified/If-Modified-Since for downloading translation files.</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="https://glotpress.trac.wordpress.org/changeset/751">751</a></dd>
<dt>Author</dt> <dd>markoheijnen</dd>
<dt>Date</dt> <dd>2013-04-27 21:24:29 +0000 (Sat, 27 Apr 2013)</dd>
</dl>
<h3>Log Message</h3>
<pre>Added Last-Modified/If-Modified-Since for downloading translation files. Props DJPaul. Fixes <a href="http://glotpress.trac.wordpress.org/ticket/236">#236</a></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkgpincludesmiscphp">trunk/gp-includes/misc.php</a></li>
<li><a href="#trunkgpincludesroutephp">trunk/gp-includes/route.php</a></li>
<li><a href="#trunkgpincludesroutestranslationphp">trunk/gp-includes/routes/translation.php</a></li>
<li><a href="#trunkgpincludesthingstranslationphp">trunk/gp-includes/things/translation.php</a></li>
<li><a href="#trunkttest_translationsphp">trunk/t/test_translations.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkgpincludesmiscphp"></a>
<div class="modfile"><h4>Modified: trunk/gp-includes/misc.php (750 => 751)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/gp-includes/misc.php 2013-04-27 13:42:27 UTC (rev 750)
+++ trunk/gp-includes/misc.php 2013-04-27 21:24:29 UTC (rev 751)
</span><span class="lines">@@ -305,4 +305,24 @@
</span><span class="cx">
</span><span class="cx"> function gp_object_has_var( $object, $var_name ) {
</span><span class="cx"> return in_array( $var_name, array_keys( get_object_vars( $object ) ) );
</span><ins>+}
+
+/**
+ * Has this translation been updated since the passed timestamp?
+ *
+ * @param GP_Translation_Set $translation_set Translation to check
+ * @param int $timestamp Optional; unix timestamp to compare against. Defaults to HTTP_IF_MODIFIED_SINCE if set.
+ * @return bool
+ */
+function gp_has_translation_been_updated( $translation_set, $timestamp = 0 ) {
+
+ // If $timestamp isn't set, try to default to the HTTP_IF_MODIFIED_SINCE header.
+ if ( ! $timestamp && isset( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) )
+ $timestamp = backpress_gmt_strtotime( $_SERVER['HTTP_IF_MODIFIED_SINCE'] );
+
+ // If nothing to compare against, then always assume there's an update available
+ if ( ! $timestamp )
+ return true;
+
+ return backpress_gmt_strtotime( GP::$translation->last_modified( $translation_set ) ) > $timestamp;
</ins><span class="cx"> }
</span><span class="cx">\ No newline at end of file
</span></span></pre></div>
<a id="trunkgpincludesroutephp"></a>
<div class="modfile"><h4>Modified: trunk/gp-includes/route.php (750 => 751)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/gp-includes/route.php 2013-04-27 13:42:27 UTC (rev 750)
+++ trunk/gp-includes/route.php 2013-04-27 21:24:29 UTC (rev 751)
</span><span class="lines">@@ -131,10 +131,14 @@
</span><span class="cx"> $this->tmpl( 'redirect', compact( 'url' ) );
</span><span class="cx"> }
</span><span class="cx">
</span><del>- function headers_for_download( $filename ) {
</del><ins>+ function headers_for_download( $filename, $translation_set = '' ) {
</ins><span class="cx"> $this->header('Content-Description: File Transfer');
</span><span class="cx"> $this->header('Pragma: public');
</span><span class="cx"> $this->header('Expires: 0');
</span><ins>+
+ if ( $translation_set )
+ $this->header( sprintf( 'Last-Modified: %s', gmdate( 'D, d M Y H:i:s', backpress_gmt_strtotime( GP::$translation->last_modified( $translation_set ) ) ) . ' GMT' ) );
+
</ins><span class="cx"> $this->header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
</span><span class="cx"> $this->header("Content-Disposition: attachment; filename=$filename");
</span><span class="cx"> $this->header("Content-Type: application/octet-stream", true);
</span></span></pre></div>
<a id="trunkgpincludesroutestranslationphp"></a>
<div class="modfile"><h4>Modified: trunk/gp-includes/routes/translation.php (750 => 751)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/gp-includes/routes/translation.php 2013-04-27 13:42:27 UTC (rev 750)
+++ trunk/gp-includes/routes/translation.php 2013-04-27 21:24:29 UTC (rev 751)
</span><span class="lines">@@ -52,8 +52,15 @@
</span><span class="cx"> $export_locale = apply_filters( 'export_locale', $locale->slug, $locale );
</span><span class="cx"> $filename = sprintf( '%s-%s.'.$format->extension, str_replace( '/', '-', $project->path ), $export_locale );
</span><span class="cx"> $entries = GP::$translation->for_export( $project, $translation_set, gp_get( 'filters' ) );
</span><del>- $this->headers_for_download( $filename );
- echo $format->print_exported_file( $project, $locale, $translation_set, $entries );
</del><ins>+
+ if ( gp_has_translation_been_updated( $translation_set ) ) {
+ $this->headers_for_download( $filename, $translation_set );
+ echo $format->print_exported_file( $project, $locale, $translation_set, $entries );
+
+ // As has_translation_been_updated() compared against HTTP_IF_MODIFIED_SINCE here, send an appropriate header.
+ } else {
+ $this->header( 'HTTP/1.1 304 Not Modified' );
+ }
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> function translations_get( $project_path, $locale_slug, $translation_set_slug ) {
</span></span></pre></div>
<a id="trunkgpincludesthingstranslationphp"></a>
<div class="modfile"><h4>Modified: trunk/gp-includes/things/translation.php (750 => 751)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/gp-includes/things/translation.php 2013-04-27 13:42:27 UTC (rev 750)
+++ trunk/gp-includes/things/translation.php 2013-04-27 21:24:29 UTC (rev 751)
</span><span class="lines">@@ -222,5 +222,11 @@
</span><span class="cx"> }
</span><span class="cx"> return $translations;
</span><span class="cx"> }
</span><ins>+
+ function last_modified( $translation_set ) {
+ global $gpdb;
+
+ return $gpdb->get_var( $gpdb->prepare( "SELECT date_modified FROM {$this->table} WHERE translation_set_id = %d AND status = %s ORDER BY date_modified DESC LIMIT 1", $translation_set->id, 'current' ) );
+ }
</ins><span class="cx"> }
</span><span class="cx"> GP::$translation = new GP_Translation();
</span></span></pre></div>
<a id="trunkttest_translationsphp"></a>
<div class="modfile"><h4>Modified: trunk/t/test_translations.php (750 => 751)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/t/test_translations.php 2013-04-27 13:42:27 UTC (rev 750)
+++ trunk/t/test_translations.php 2013-04-27 21:24:29 UTC (rev 751)
</span><span class="lines">@@ -74,4 +74,21 @@
</span><span class="cx"> $this->assertEquals( '1', $domain->translate( '1' ) );
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ function test_if_translation_has_been_updated_since_timestamp() {
+ $set = $this->factory->translation_set->create_with_project_and_locale();
+ $original = $this->factory->original->create( array( 'project_id' => $set->project_id ) );
+ $this->factory->translation->create( array(
+ 'original_id' => $original->id,
+ 'translation_set_id' => $set->id,
+ 'status' => 'current',
+ ) );
+
+ $this->assertTrue( gp_has_translation_been_updated( $set ) );
+
+ $_SERVER['HTTP_IF_MODIFIED_SINCE'] = 'Sat, 27 Apr 2012 15:49:29 GMT';
+ $this->assertTrue( gp_has_translation_been_updated( $set ) );
+
+ $_SERVER['HTTP_IF_MODIFIED_SINCE'] = 'Wed, 2 Feb 2022 22:22:22 GMT';
+ $this->assertFalse( gp_has_translation_been_updated( $set ) );
+ }
</ins><span class="cx"> }
</span><span class="cx">\ No newline at end of file
</span></span></pre>
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