From 9e3ee51b307bedc8003d411f0295985ebba7110f Mon Sep 17 00:00:00 2001
From: Joas Schilling <coding@schilljs.com>
Date: Tue, 5 Jul 2022 12:26:22 +0200
Subject: [PATCH] Add a warning when FPM is used with MPM_PREFORK

Signed-off-by: Joas Schilling <coding@schilljs.com>
---
 lib/Settings/Admin/AdminSettings.php          | 21 +++++++++++++++++++
 .../AdminSettings/WebServerSetupChecks.vue    | 15 +++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/lib/Settings/Admin/AdminSettings.php b/lib/Settings/Admin/AdminSettings.php
index 34cb300987..08e151e107 100644
--- a/lib/Settings/Admin/AdminSettings.php
+++ b/lib/Settings/Admin/AdminSettings.php
@@ -97,6 +97,7 @@ class AdminSettings implements ISettings {
 		$this->initialState->provideInitialState('default_group_notification', (int) $this->serverConfig->getAppValue('spreed', 'default_group_notification', Participant::NOTIFY_MENTION));
 		$this->initialState->provideInitialState('conversations_files', (int) $this->serverConfig->getAppValue('spreed', 'conversations_files', '1'));
 		$this->initialState->provideInitialState('conversations_files_public_shares', (int) $this->serverConfig->getAppValue('spreed', 'conversations_files_public_shares', '1'));
+		$this->initialState->provideInitialState('valid_apache_php_configuration', (int) $this->validApachePHPConfiguration());
 	}
 
 	protected function initAllowedGroups(): void {
@@ -497,6 +498,26 @@ class AdminSettings implements ISettings {
 		return $groups;
 	}
 
+	protected function validApachePHPConfiguration(): bool {
+		$output = [];
+		@exec('apachectl -M | grep mpm', $output, $returnCode);
+
+		if ($returnCode > 0) {
+			return true;
+		}
+
+		$apacheModule = implode("\n", $output);
+		$usingFPM = ini_get('fpm.config') !== false;
+
+		if ($usingFPM) {
+			// Needs to use mpm_event
+			return strpos($apacheModule, 'mpm_event') !== false;
+		}
+
+		// Needs to use mpm_prefork
+		return strpos($apacheModule, 'mpm_prefork') !== false;
+	}
+
 	/**
 	 * @return string the section ID, e.g. 'sharing'
 	 */
diff --git a/src/components/AdminSettings/WebServerSetupChecks.vue b/src/components/AdminSettings/WebServerSetupChecks.vue
index 64427bd583..9cb033c9d9 100644
--- a/src/components/AdminSettings/WebServerSetupChecks.vue
+++ b/src/components/AdminSettings/WebServerSetupChecks.vue
@@ -24,6 +24,11 @@
 			{{ t('spreed', 'Web server setup checks') }}
 		</h2>
 
+		<p v-if="!validApachePHPConfiguration"
+			class="settings-hint warning">
+			{{ apacheWarning }}
+		</p>
+
 		<ul class="web-server-setup-checks">
 			<li class="background-blur">
 				{{ t('spreed', 'Files required for background blur can be loaded') }}
@@ -55,6 +60,7 @@ import Tooltip from '@nextcloud/vue/dist/Directives/Tooltip'
 import { VIRTUAL_BACKGROUND_TYPE } from '../../utils/media/effects/virtual-background/constants.js'
 import JitsiStreamBackgroundEffect from '../../utils/media/effects/virtual-background/JitsiStreamBackgroundEffect.js'
 import VirtualBackground from '../../utils/media/pipeline/VirtualBackground.js'
+import { loadState } from '@nextcloud/initial-state'
 
 export default {
 	name: 'WebServerSetupChecks',
@@ -66,6 +72,7 @@ export default {
 	data() {
 		return {
 			backgroundBlurLoaded: undefined,
+			validApachePHPConfiguration: true,
 		}
 	},
 
@@ -109,6 +116,14 @@ export default {
 
 			return t('spreed', 'Checking …')
 		},
+
+		apacheWarning() {
+			return t('spreed', 'It seems that the PHP and Apache configuration is not compatible. Please note that PHP can only be used with the MPM_PREFORK module and PHP-FPM can only be used with the MPM_EVENT module.')
+		},
+	},
+
+	mounted() {
+		this.validApachePHPConfiguration = parseInt(loadState('spreed', 'valid_apache_php_configuration')) === 1
 	},
 
 	beforeMount() {