From 50abb51ecec5a147326717146c947a9756570bcf Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Fri, 30 Aug 2019 08:29:46 +0900
Subject: [PATCH] Syslog support

Resolve #5355
---
 .config/example.yml    |  5 ++++
 package.json           |  1 +
 src/config/types.ts    |  5 ++++
 src/services/logger.ts | 52 +++++++++++++++++++++++++++++++++---------
 4 files changed, 52 insertions(+), 11 deletions(-)

diff --git a/.config/example.yml b/.config/example.yml
index e23ab126c6..0a62d5cebd 100644
--- a/.config/example.yml
+++ b/.config/example.yml
@@ -125,3 +125,8 @@ autoAdmin: true
 
 # IP address family used for outgoing request (ipv4, ipv6 or dual)
 #outgoingAddressFamily: ipv4
+
+# Syslog option
+#syslog:
+#  host: localhost
+#  port: 514
diff --git a/package.json b/package.json
index dc27f90b91..528440fd2a 100644
--- a/package.json
+++ b/package.json
@@ -219,6 +219,7 @@
 		"stylus": "0.54.5",
 		"stylus-loader": "3.0.2",
 		"summaly": "2.3.0",
+		"syslog-pro": "1.0.0",
 		"systeminformation": "4.14.4",
 		"syuilo-password-strength": "0.0.1",
 		"terser-webpack-plugin": "1.4.1",
diff --git a/src/config/types.ts b/src/config/types.ts
index 18382d7435..fbb348fc02 100644
--- a/src/config/types.ts
+++ b/src/config/types.ts
@@ -45,6 +45,11 @@ export type Source = {
 
 	deliverJobConcurrency?: number;
 	inboxJobConcurrency?: number;
+
+	syslog: {
+		host: string;
+		port: number;
+	};
 };
 
 /**
diff --git a/src/services/logger.ts b/src/services/logger.ts
index c393f017c2..b170be780a 100644
--- a/src/services/logger.ts
+++ b/src/services/logger.ts
@@ -6,6 +6,9 @@ import { program } from '../argv';
 import { getRepository } from 'typeorm';
 import { Log } from '../models/entities/log';
 import { genId } from '../misc/gen-id';
+import config from '../config';
+
+const SyslogPro = require('syslog-pro');
 
 type Domain = {
 	name: string;
@@ -18,6 +21,7 @@ export default class Logger {
 	private domain: Domain;
 	private parentLogger: Logger | null = null;
 	private store: boolean;
+	private syslogClient: any | null = null;
 
 	constructor(domain: string, color?: string, store = true) {
 		this.domain = {
@@ -25,6 +29,20 @@ export default class Logger {
 			color: color,
 		};
 		this.store = store;
+
+		if (config.syslog) {
+			this.syslogClient = new SyslogPro.RFC5424({
+				applacationName: 'Misskey',
+				timestamp: true,
+				encludeStructuredData: true,
+				color: true,
+				extendedColor: true,
+				server: {
+					target: config.syslog.host,
+					port: config.syslog.port,
+				}
+			});
+		}
 	}
 
 	public createSubLogger(domain: string, color?: string, store = true): Logger {
@@ -66,17 +84,29 @@ export default class Logger {
 		console.log(important ? chalk.bold(log) : log);
 
 		if (store) {
-			const Logs = getRepository(Log);
-			Logs.insert({
-				id: genId(),
-				createdAt: new Date(),
-				machine: os.hostname(),
-				worker: worker.toString(),
-				domain: [this.domain].concat(subDomains).map(d => d.name),
-				level: level,
-				message: message,
-				data: data,
-			} as Log);
+			if (this.syslogClient) {
+				const send =
+					level === 'error' ? this.syslogClient.error :
+					level === 'warning' ? this.syslogClient.warning :
+					level === 'success' ? this.syslogClient.info :
+					level === 'debug' ? this.syslogClient.info :
+					level === 'info' ? this.syslogClient.info :
+					null as never;
+
+				send(message);
+			} else {
+				const Logs = getRepository(Log);
+				Logs.insert({
+					id: genId(),
+					createdAt: new Date(),
+					machine: os.hostname(),
+					worker: worker.toString(),
+					domain: [this.domain].concat(subDomains).map(d => d.name),
+					level: level,
+					message: message,
+					data: data,
+				} as Log);
+			}
 		}
 	}