feat(core): first attempt to init script standard (#8224)

- lazy load
- rate limit per path
- init .debug.json support
- docs
- maintainer
- radar

lib/middleware/cache/redis.js

@@ -0,0 +1,48 @@
+const config = require('@/config').value;
+const Redis = require('ioredis');
+const logger = require('@/utils/logger');
+
+const redisClient = new Redis(config.redis.url);
+
+const status = { available: false };
+
+redisClient.on('error', (error) => {
+    status.available = false;
+    logger.error('Redis error: ', error);
+});
+redisClient.on('end', () => {
+    status.available = false;
+});
+redisClient.on('connect', () => {
+    status.available = true;
+    logger.info('Redis connected.');
+});
+
+module.exports = {
+    get: async (key, refresh = true) => {
+        if (key && status.available) {
+            let value = await redisClient.get(key);
+            if (value && refresh) {
+                redisClient.expire(key, config.cache.contentExpire);
+                value = value + '';
+            }
+            return value;
+        }
+    },
+    set: (key, value, maxAge = config.cache.contentExpire) => {
+        if (!status.available) {
+            return;
+        }
+        if (!value || value === 'undefined') {
+            value = '';
+        }
+        if (typeof value === 'object') {
+            value = JSON.stringify(value);
+        }
+        if (key) {
+            return redisClient.set(key, value, 'EX', maxAge); // setMode: https://redis.io/commands/set
+        }
+    },
+    clients: { redisClient },
+    status,
+};