Make connectivity check domains configurable

Signed-off-by: Sylvia van Os <sylvia@hackerchick.me>

config/config.sample.php

@@ -656,6 +656,26 @@ $CONFIG = array(
  */
 'has_internet_connection' => true,
 
+/**
+ * Which domains to request to determine the availability of an Internet
+ * connection. If none of these hosts are reachable, the administration panel
+ * will show a warning. Set to an empty list to not do any such checks (warning
+ * will still be shown).
+ *
+ * Defaults to the following domains:
+ *
+ *  - www.nextcloud.com
+ *  - www.startpage.com
+ *  - www.eff.org
+ *  - www.edri.org
+ */
+'connectivity_check_domains' => array(
+	'www.nextcloud.com',
+	'www.startpage.com',
+	'www.eff.org',
+	'www.edri.org'
+),
+
 /**
  * Allows Nextcloud to verify a working .well-known URL redirects. This is done
  * by attempting to make a request from JS to

settings/Controller/CheckSetupController.php

@@ -130,11 +130,9 @@ class CheckSetupController extends Controller {
 			return false;
 		}
 
-		$siteArray = ['www.nextcloud.com',
-						'www.startpage.com',
-						'www.eff.org',
-						'www.edri.org',
-			];
+		$siteArray = $this->config->getSystemValue('connectivity_check_domains', [
+			'www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'
+		]);
 
 		foreach($siteArray as $site) {
 			if ($this->isSiteReachable($site)) {

tests/Settings/Controller/CheckSetupControllerTest.php

@@ -189,10 +189,15 @@ class CheckSetupControllerTest extends TestCase {
 	}
 
 	public function testIsInternetConnectionWorkingCorrectly() {
-		$this->config->expects($this->once())
+		$this->config->expects($this->at(0))
 			->method('getSystemValue')
 			->with('has_internet_connection', true)
-			->will($this->returnValue(true));
+            ->will($this->returnValue(true));
+
+		$this->config->expects($this->at(1))
+			->method('getSystemValue')
+			->with('connectivity_check_domains', ['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'])
+			->will($this->returnValue(['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org']));
 
 		$client = $this->getMockBuilder('\OCP\Http\Client\IClient')
 			->disableOriginalConstructor()->getMock();
@@ -213,10 +218,15 @@ class CheckSetupControllerTest extends TestCase {
 	}
 
 	public function testIsInternetConnectionFail() {
-		$this->config->expects($this->once())
+		$this->config->expects($this->at(0))
 			->method('getSystemValue')
 			->with('has_internet_connection', true)
-			->will($this->returnValue(true));
+            ->will($this->returnValue(true));
+
+		$this->config->expects($this->at(1))
+			->method('getSystemValue')
+			->with('connectivity_check_domains', ['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'])
+			->will($this->returnValue(['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org']));
 
 		$client = $this->getMockBuilder('\OCP\Http\Client\IClient')
 			->disableOriginalConstructor()->getMock();
@@ -338,14 +348,18 @@ class CheckSetupControllerTest extends TestCase {
 			->with('core', 'cronErrors')
 			->willReturn('');
 		$this->config->expects($this->at(2))
+			->method('getSystemValue')
+			->with('connectivity_check_domains', ['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org'])
+			->will($this->returnValue(['www.nextcloud.com', 'www.startpage.com', 'www.eff.org', 'www.edri.org']));
+		$this->config->expects($this->at(3))
 			->method('getSystemValue')
 			->with('memcache.local', null)
 			->will($this->returnValue('SomeProvider'));
-		$this->config->expects($this->at(3))
+		$this->config->expects($this->at(4))
 			->method('getSystemValue')
 			->with('has_internet_connection', true)
 			->will($this->returnValue(true));
-		$this->config->expects($this->at(4))
+		$this->config->expects($this->at(5))
 			->method('getSystemValue')
 			->with('appstoreenabled', true)
 			->will($this->returnValue(false));