fix: use redis-semaphore for global mutex and memory leak prevention

packages/backend/package.json

@@ -43,7 +43,6 @@
 		"ajv": "8.12.0",
 		"archiver": "5.3.1",
 		"argon2": "^0.30.3",
-		"async-mutex": "^0.4.0",
 		"autobind-decorator": "2.4.0",
 		"autolinker": "4.0.0",
 		"autwh": "0.1.0",

packages/backend/src/misc/emoji-meta.ts

@@ -1,30 +1,36 @@
 import probeImageSize from "probe-image-size";
-import { Mutex, withTimeout } from "async-mutex";
+import { Mutex } from "redis-semaphore";
 
 import { FILE_TYPE_BROWSERSAFE } from "@/const.js";
 import Logger from "@/services/logger.js";
-import { Cache } from "./cache.js";
+import { redisClient } from "@/db/redis.js";
 
 export type Size = {
 	width: number;
 	height: number;
 };
 
-const cache = new Cache<boolean>(1000 * 60 * 10); // once every 10 minutes for the same url
+const logger = new Logger("emoji");
-const mutex = withTimeout(new Mutex(), 1000);
 
 export async function getEmojiSize(url: string): Promise<Size> {
-	const logger = new Logger("emoji");
+	let attempted = true;
 
-	await mutex.runExclusive(() => {
+	const lock = new Mutex(redisClient, "getEmojiSize");
-		const attempted = cache.get(url);
+	await lock.acquire();
+	try {
+		const key = `getEmojiSize:${url}`;
+		attempted = await redisClient.get(key) !== null;
 		if (!attempted) {
-			cache.set(url, true);
+			await redisClient.set(key, "done", "EX", 60 * 10);
-		} else {
-			logger.warn(`Attempt limit exceeded: ${url}`);
-			throw new Error("Too many attempts");
 		}
-	});
+	} finally {
+		await lock.release();
+	}
+
+	if (attempted) {
+		logger.warn(`Attempt limit exceeded: ${url}`);
+		throw new Error("attempt limit exceeded");
+	}
 
 	try {
 		logger.info(`Retrieving emoji size from ${url}`);
@@ -32,11 +38,11 @@ export async function getEmojiSize(url: string): Promise<Size> {
 			timeout: 5000,
 		});
 		if (!(mime.startsWith("image/") && FILE_TYPE_BROWSERSAFE.includes(mime))) {
-			throw new Error("Unsupported image type");
+			throw new Error("unsupported image type");
 		}
 		return { width, height };
 	} catch (e) {
-		throw new Error(`Unable to retrieve metadata: ${e}`);
+		throw new Error(`unable to retrieve metadata: ${e}`);
 	}
 }
 

pnpm-lock.yaml

@@ -132,9 +132,6 @@ importers:
       argon2:
         specifier: ^0.30.3
         version: 0.30.3
-      async-mutex:
-        specifier: ^0.4.0
-        version: 0.4.0
       autobind-decorator:
         specifier: 2.4.0
         version: 2.4.0
@@ -601,7 +598,7 @@ importers:
         version: 5.1.3
       webpack:
         specifier: ^5.85.1
-        version: 5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3)
+        version: 5.85.1(@swc/core@1.3.62)
       ws:
         specifier: 8.13.0
         version: 8.13.0
@@ -4496,12 +4493,6 @@ packages:
       stream-exhaust: 1.0.2
     dev: true
 
-  /async-mutex@0.4.0:
-    resolution: {integrity: sha512-eJFZ1YhRR8UN8eBLoNzcDPcy/jqjsg6I1AP+KvWQX80BqOSW1oJPJXDylPUEeMr2ZQvHgnQ//Lp6f3RQ1zI7HA==}
-    dependencies:
-      tslib: 2.6.0
-    dev: false
-
   /async-settle@1.0.0:
     resolution: {integrity: sha512-VPXfB4Vk49z1LHHodrEQ6Xf7W4gg1w0dAPROHngx7qgDjqmIQ+fXmwgGXTW/ITLai0YLSvWepJOP9EVpMnEAcw==}
     engines: {node: '>= 0.10'}
@@ -4646,7 +4637,7 @@ packages:
   /axios@0.24.0:
     resolution: {integrity: sha512-Q6cWsys88HoPgAaFAVUb0WpPk0O8iTeisR9IMqy9G8AbO4NlpVknrnQS03zzF9PGAWgO3cgletO3VjV/P7VztA==}
     dependencies:
-      follow-redirects: 1.15.2(debug@4.3.4)
+      follow-redirects: 1.15.2
     transitivePeerDependencies:
       - debug
     dev: false
@@ -4662,7 +4653,7 @@ packages:
   /axios@1.2.2:
     resolution: {integrity: sha512-bz/J4gS2S3I7mpN/YZfGFTqhXTYzRho8Ay38w2otuuDR322KzFIWm/4W2K6gIwvWaws5n+mnb7D1lN9uD+QH6Q==}
     dependencies:
-      follow-redirects: 1.15.2(debug@4.3.4)
+      follow-redirects: 1.15.2
       form-data: 4.0.0
       proxy-from-env: 1.1.0
     transitivePeerDependencies:
@@ -4672,7 +4663,7 @@ packages:
   /axios@1.4.0:
     resolution: {integrity: sha512-S4XCWMEmzvo64T9GfvQDOXgYRDJ/wsSZc7Jvdgx5u1sd0JwsuPLqb3SYmusag+edF6ziyMensPVqLTSc1PiSEA==}
     dependencies:
-      follow-redirects: 1.15.2(debug@4.3.4)
+      follow-redirects: 1.15.2
       form-data: 4.0.0
       proxy-from-env: 1.1.0
     transitivePeerDependencies:
@@ -6288,6 +6279,17 @@ packages:
     dependencies:
       ms: 2.0.0
 
+  /debug@3.2.7:
+    resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+    dependencies:
+      ms: 2.1.3
+    dev: false
+
   /debug@3.2.7(supports-color@8.1.1):
     resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
     peerDependencies:
@@ -6298,6 +6300,7 @@ packages:
     dependencies:
       ms: 2.1.3
       supports-color: 8.1.1
+    dev: true
 
   /debug@4.3.3:
     resolution: {integrity: sha512-/zxw5+vh1Tfv+4Qn7a5nsbcJKPaSvCDhojn6FEl9vupwK2VCSDtEiEtqr8DFtzYFOdz63LBkxec7DYuc2jon6Q==}
@@ -7535,6 +7538,16 @@ packages:
       tabbable: 6.2.0
     dev: true
 
+  /follow-redirects@1.15.2:
+    resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
+    engines: {node: '>=4.0'}
+    peerDependencies:
+      debug: '*'
+    peerDependenciesMeta:
+      debug:
+        optional: true
+    dev: false
+
   /follow-redirects@1.15.2(debug@4.3.4):
     resolution: {integrity: sha512-VQLG33o04KaQ8uYi2tVNbdrWp1QWxNNea+nmIB4EVM28v0hmP17z7aG1+wAkNzVq4KeXTq3221ye5qTJP91JwA==}
     engines: {node: '>=4.0'}
@@ -7545,6 +7558,7 @@ packages:
         optional: true
     dependencies:
       debug: 4.3.4(supports-color@8.1.1)
+    dev: true
 
   /for-each@0.3.3:
     resolution: {integrity: sha512-jqYfLp7mo9vIyQf8ykW2v7A+2N4QjeCeI5+Dz9XraiO1ign81wjiH7Fb9vSOWvQfNtmSa4H2RoQTrrXivdUZmw==}
@@ -8455,7 +8469,7 @@ packages:
     engines: {node: '>= 4.5.0'}
     dependencies:
       agent-base: 4.3.0
-      debug: 3.2.7(supports-color@8.1.1)
+      debug: 3.2.7
     transitivePeerDependencies:
       - supports-color
     dev: false
@@ -9854,7 +9868,7 @@ packages:
       json5: 2.2.3
       loader-utils: 2.0.4
       schema-utils: 3.3.0
-      webpack: 5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3)
+      webpack: 5.85.1(@swc/core@1.3.62)
     dev: true
 
   /json5@2.2.3:
@@ -10097,7 +10111,7 @@ packages:
     resolution: {integrity: sha512-UqyYyH5YEXaJrf9S8E23GoJFQZXkBVJ9zYYMPGz919MSX1KuvAcycIuS0ci150HCoPf4XQVhQ84Qf8xRPWxFaQ==}
     engines: {node: '>= 7.6.0'}
     dependencies:
-      debug: 3.2.7(supports-color@8.1.1)
+      debug: 3.2.7
       koa-send: 5.0.1
     transitivePeerDependencies:
       - supports-color
@@ -11091,7 +11105,7 @@ packages:
     engines: {node: '>= 4.4.x'}
     hasBin: true
     dependencies:
-      debug: 3.2.7(supports-color@8.1.1)
+      debug: 3.2.7
       iconv-lite: 0.4.24
       sax: 1.2.4
     transitivePeerDependencies:
@@ -13997,7 +14011,7 @@ packages:
       webpack: '>=2'
     dependencies:
       '@swc/core': 1.3.62
-      webpack: 5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3)
+      webpack: 5.85.1(@swc/core@1.3.62)
     dev: true
 
   /swiper@9.3.2:
@@ -14118,7 +14132,7 @@ packages:
       schema-utils: 3.3.0
       serialize-javascript: 6.0.1
       terser: 5.18.2
-      webpack: 5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3)
+      webpack: 5.85.1(@swc/core@1.3.62)
     dev: true
 
   /terser@5.18.2:
@@ -14418,7 +14432,7 @@ packages:
       micromatch: 4.0.5
       semver: 7.5.1
       typescript: 5.1.3
-      webpack: 5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3)
+      webpack: 5.85.1(@swc/core@1.3.62)
     dev: true
 
   /ts-node@10.4.0(@swc/core@1.3.62)(@types/node@20.3.1)(typescript@5.1.3):
@@ -15252,6 +15266,46 @@ packages:
     engines: {node: '>=10.13.0'}
     dev: true
 
+  /webpack@5.85.1(@swc/core@1.3.62):
+    resolution: {integrity: sha512-xTb7MRf4LY8Z5rzn7aIx4TDrwYJrjcHnIfU1TqtyZOoObyuGSpAUwIvVuqq5wPnv7WEgQr8UvO1q/dgoGG4HjA==}
+    engines: {node: '>=10.13.0'}
+    hasBin: true
+    peerDependencies:
+      webpack-cli: '*'
+    peerDependenciesMeta:
+      webpack-cli:
+        optional: true
+    dependencies:
+      '@types/eslint-scope': 3.7.4
+      '@types/estree': 1.0.1
+      '@webassemblyjs/ast': 1.11.6
+      '@webassemblyjs/wasm-edit': 1.11.6
+      '@webassemblyjs/wasm-parser': 1.11.6
+      acorn: 8.9.0
+      acorn-import-assertions: 1.9.0(acorn@8.9.0)
+      browserslist: 4.21.9
+      chrome-trace-event: 1.0.3
+      enhanced-resolve: 5.15.0
+      es-module-lexer: 1.3.0
+      eslint-scope: 5.1.1
+      events: 3.3.0
+      glob-to-regexp: 0.4.1
+      graceful-fs: 4.2.11
+      json-parse-even-better-errors: 2.3.1
+      loader-runner: 4.3.0
+      mime-types: 2.1.35
+      neo-async: 2.6.2
+      schema-utils: 3.3.0
+      tapable: 2.2.1
+      terser-webpack-plugin: 5.3.9(@swc/core@1.3.62)(webpack@5.85.1)
+      watchpack: 2.4.0
+      webpack-sources: 3.2.3
+    transitivePeerDependencies:
+      - '@swc/core'
+      - esbuild
+      - uglify-js
+    dev: true
+
   /webpack@5.85.1(@swc/core@1.3.62)(webpack-cli@5.1.3):
     resolution: {integrity: sha512-xTb7MRf4LY8Z5rzn7aIx4TDrwYJrjcHnIfU1TqtyZOoObyuGSpAUwIvVuqq5wPnv7WEgQr8UvO1q/dgoGG4HjA==}
     engines: {node: '>=10.13.0'}