Add download feature for domain block list

- Add new /blocklist/domain/download route
- Add link on /friendica page

src/Module/Blocklist/Domain/Download.php

@@ -0,0 +1,71 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2022, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace Friendica\Module\Blocklist\Domain;
+
+use Friendica\App;
+use Friendica\Core\Config\Capability\IManageConfigValues;
+use Friendica\Core\L10n;
+use Friendica\Core\System;
+use Friendica\Module\Response;
+use Friendica\Util\Profiler;
+use Psr\Log\LoggerInterface;
+
+class Download extends \Friendica\BaseModule
+{
+	/** @var IManageConfigValues */
+	private $config;
+
+	public function __construct(IManageConfigValues $config, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
+	{
+		parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
+
+		$this->config = $config;
+	}
+
+	protected function rawContent(array $request = [])
+	{
+		$blocklist = $this->config->get('system', 'blocklist');
+
+		$blocklistJson = json_encode($blocklist, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
+
+		$hash = md5($blocklistJson);
+
+		$etag = 'W/"' . $hash . '"';
+
+		if (trim($_SERVER['HTTP_IF_NONE_MATCH'] ?? '') == $etag) {
+			header("HTTP/1.1 304 Not Modified");
+		}
+
+		header('Content-Type: text/csv');
+		header('Content-Transfer-Encoding: Binary');
+		header('Content-disposition: attachment; filename="' . $this->baseUrl->getHostname() . '_domain_blocklist_' . substr($hash, 0, 6) . '.csv"');
+		header("Etag: $etag");
+
+		$fp = fopen('php://output', 'w');
+		foreach ($blocklist as $domain) {
+			fputcsv($fp, $domain);
+		}
+		fclose($fp);
+
+		System::exit();
+	}
+}

src/Module/Friendica.php

@@ -81,6 +81,7 @@ class Friendica extends BaseModule
 					DI::l10n()->t('Blocked domain'),
 					DI::l10n()->t('Reason for the block'),
 				],
+				'download' => DI::l10n()->t('Download this list in CSV format'),
 				'list'     => $blockList,
 			];
 		} else {

static/routes.config.php

@@ -353,6 +353,9 @@ return [
 	'/attach/{item:\d+}'   => [Module\Attach::class,       [R::GET]],
 	'/babel'               => [Module\Debug\Babel::class,  [R::GET, R::POST]],
 	'/debug/ap'            => [Module\Debug\ActivityPubConversion::class,  [R::GET, R::POST]],
+
+	'/blocklist/domain/download' => [Module\Blocklist\Domain\Download::class, [R::GET]],
+
 	'/bookmarklet'         => [Module\Bookmarklet::class,  [R::GET]],
 
 	'/community[/{content}]' => [Module\Conversation\Community::class, [R::GET]],

view/templates/friendica.tpl

@@ -1,28 +1,22 @@
-<div id="friendica" class="generic-page-wrapper">
+<div id="friendica">
 	<h1>Friendica</h1>
-	<br>
 	<p>{{$about nofilter}}</p>
-	<br>
 	<p>{{$friendica nofilter}}</p>
-	<br>
 	<p>{{$bugs nofilter}}</p>
-	<br>
 	<p>{{$info nofilter}}</p>
-	<br>
 
 	<p>{{$visible_addons.title nofilter}}</p>
-	{{if $visible_addons.list}}
+{{if $visible_addons.list}}
 	<div style="margin-left: 25px; margin-right: 25px; margin-bottom: 25px;">{{$visible_addons.list}}</div>
-	{{/if}}
+{{/if}}
 
-	{{if $tos}}
+{{if $tos}}
 	<p>{{$tos nofilter}}</p>
-	{{/if}}
+{{/if}}
 
-	{{if $block_list}}
+{{if $block_list}}
 	<div id="about_blocklist">
 		<p>{{$block_list.title}}</p>
-		<br>
 		<table class="table">
 			<thead>
 				<tr>
@@ -39,9 +33,9 @@
 			{{/foreach}}
 			</tbody>
 		</table>
+		<p><a href="/blocklist/domain/download"><i class="fa fa-download"></i> {{$block_list.download}}</a></p>
 	</div>
+{{/if}}
 
-	{{/if}}
-
-{{$hooked nofilter}}
+	{{$hooked nofilter}}
 </div>