Merge pull request #4225 from owncloud/better-404

More verbose 404, closes #3225

apps/files_sharing/css/404.css

@@ -0,0 +1,12 @@
+
+#body-login .error-broken-link{
+ text-align:left;color:#fff;
+}
+
+#body-login .error-broken-link ul{
+	margin:10px 0 10px 0;
+}
+
+#body-login .error-broken-link ul li{
+	list-style: disc;list-style-position:inside;cursor:default;	
+}

apps/files_sharing/public.php

@@ -234,6 +234,12 @@ if (isset($path)) {
 } else {
 	OCP\Util::writeLog('share', 'could not resolve linkItem', \OCP\Util::DEBUG);
 }
+
+$errorTemplate = new OCP\Template('files_sharing', 'part.404', '');
+$errorContent = $errorTemplate->fetchPage();
+
 header('HTTP/1.0 404 Not Found');
+OCP\Util::addStyle('files_sharing', '404');
 $tmpl = new OCP\Template('', '404', 'guest');
+$tmpl->assign('content', $errorContent);
 $tmpl->printPage();

apps/files_sharing/templates/part.404.php

@@ -0,0 +1,12 @@
+<ul>
+	<li class="error error-broken-link">
+		<p><?php p($l->t('Sorry, this link doesn’t seem to work anymore.')) ?></p>
+		<p><?php p($l->t('Reasons might be:')); ?></p>
+		<ul>
+			<li><?php p($l->t('the item was removed')); ?></li>
+			<li><?php p($l->t('the link expired')); ?></li>
+			<li><?php p($l->t('sharing is disabled')); ?></li>
+		</ul>
+		<p><?php p($l->t('For more info, please ask the person who sent this link.')); ?></p>
+	</li>
+</ul>

core/templates/404.php

@@ -7,9 +7,13 @@ if(!isset($_)) {//also provide standalone error page
 	exit;
 }
 ?>
-<ul>
-	<li class='error'>
-		<?php p($l->t( 'Cloud not found' )); ?><br/>
-		<p class='hint'><?php if(isset($_['file'])) p($_['file'])?></p>
-	</li>
-</ul>
+<?php if (isset($_['content'])): ?>
+	<?php print_unescaped($_['content']) ?>
+<?php else: ?>
+	<ul>
+		<li class="error">
+			<?php p($l->t( 'Cloud not found' )); ?><br/>
+			<p class='hint'><?php if(isset($_['file'])) p($_['file'])?></p>
+		</li>
+	</ul>
+<?php endif; ?>