fix:动图卡顿问题

package.json

@@ -25,6 +25,7 @@
     "@nestjs/swagger": "^11.2.0",
     "@nestjs/websockets": "^11.1.6",
     "axios": "1.11.0",
+    "image-type": "^6.0.0",
     "ioredis": "^5.6.1",
     "moment": "^2.30.1",
     "reflect-metadata": "^0.2.2",

pnpm-lock.yaml

@@ -38,6 +38,9 @@ importers:
       axios:
         specifier: 1.11.0
         version: 1.11.0
+      image-type:
+        specifier: ^6.0.0
+        version: 6.0.0
       ioredis:
         specifier: ^5.6.1
         version: 5.6.1
@@ -2062,6 +2065,10 @@ packages:
     resolution: {integrity: sha512-VZR5I7k5wkD0HgFnMsq5hOsSc710MJMu5Nc5QYsbe38NN5iPV/XTObYLc/cpttRTf6lX538+5uO1ZQRhYibiZQ==}
     engines: {node: '>=18'}
 
+  file-type@20.5.0:
+    resolution: {integrity: sha512-BfHZtG/l9iMm4Ecianu7P8HRD2tBHLtjXinm4X62XBOYzi7CYA7jyqfJzOvXHqzVrVPYqBo2/GvbARMaaJkKVg==}
+    engines: {node: '>=18'}
+
   file-type@21.0.0:
     resolution: {integrity: sha512-ek5xNX2YBYlXhiUXui3D/BXa3LdqPmoLJ7rqEx2bKJ7EAUEfmXgW0Das7Dc6Nr9MvqaOnIqiPV0mZk/r/UpNAg==}
     engines: {node: '>=20'}
@@ -2301,6 +2308,10 @@ packages:
     resolution: {integrity: sha512-Hs59xBNfUIunMFgWAbGX5cq6893IbWg4KnrjbYwX3tx0ztorVgTDA6B2sxf8ejHJ4wz8BqGUMYlnzNBer5NvGg==}
     engines: {node: '>= 4'}
 
+  image-type@6.0.0:
+    resolution: {integrity: sha512-efpcYd/E9A7a+oanft11ceIbO9Aw0iszfJ7Qfh4QLWl2Ulsth9nnllV/L1TmzKwlQ2O5FuT08vy5zxLnGxZe8w==}
+    engines: {node: '>=20'}
+
   import-fresh@3.3.1:
     resolution: {integrity: sha512-TR3KfrTZTYLPB6jUjfx6MF9WcWrHL9su5TObK4ZkYgBdWKPOFoSoQIdEuTuR82pmtxH2spWG9h6etwfr1pLBqQ==}
     engines: {node: '>=6'}
@@ -5886,6 +5897,15 @@ snapshots:
       token-types: 6.0.3
       uint8array-extras: 1.4.0
 
+  file-type@20.5.0:
+    dependencies:
+      '@tokenizer/inflate': 0.2.7
+      strtok3: 10.3.2
+      token-types: 6.0.3
+      uint8array-extras: 1.4.0
+    transitivePeerDependencies:
+      - supports-color
+
   file-type@21.0.0:
     dependencies:
       '@tokenizer/inflate': 0.2.7
@@ -6137,6 +6157,12 @@ snapshots:
 
   ignore@7.0.5: {}
 
+  image-type@6.0.0:
+    dependencies:
+      file-type: 20.5.0
+    transitivePeerDependencies:
+      - supports-color
+
   import-fresh@3.3.1:
     dependencies:
       parent-module: 1.0.1

src/main.ts

@@ -24,7 +24,9 @@ async function bootstrap() {
     }
   }
 
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create(AppModule, { cors: true });
+  const expressApp = app.getHttpAdapter().getInstance();
+  expressApp.set('trust proxy', true);
   app.setGlobalPrefix('api', {
     exclude: [
       'cdn',

src/modules/meme/meme.controller.ts

@@ -18,6 +18,7 @@ import * as fs from 'fs';
 import { Throttle } from 'stream-throttle';
 import { ToolsService } from '../../core/tools/tools.service';
 import { RedisService } from '../../core/redis/redis.service';
+import imageType from 'image-type';
 
 class MemeRequestDto {
   character?: string;
@@ -113,6 +114,20 @@ export class MemeController {
         );
       });
 
+      const fd = await fs.promises.open(memePath, 'r');
+      const { buffer } = await fd.read(Buffer.alloc(4100), 0, 4100, 0);
+      await fd.close();
+      const type = await imageType(buffer);
+      const isAnimatedImage =
+        type?.mime === 'image/gif' ||
+        type?.mime === 'image/webp' ||
+        type?.mime === 'image/apng';
+
+      this.logger.debug(type?.mime);
+      const singleRate = 100 * 1024; // 100 KB/s * 3
+      const maxThreads = 3;
+      const maxRate = singleRate * maxThreads;
+
       if (hasValidToken) {
         this.logger.log(`[${method}] 有token的入不限速 => ${memePath}`);
         stream.pipe(res);
@@ -124,15 +139,18 @@ export class MemeController {
             bytes,
             1,
           );
-          if (total > 100 * 1024) {
-            this.logger.warn(`[${method}]${ip} 超过速率限制,断开连接..`);
+          if (total > maxRate && !isAnimatedImage) {
+            this.logger.warn(`[${method}] ${ip} 超过速率限制,断开连接..`);
             stream.destroy();
             res.end();
           }
         });
 
-        const throttle = new Throttle({ rate: 100 * 1024 });
-        this.logger.log(`[${method}] 白嫖入限速! (${ip}) => ${memePath}`);
+        const throttle = new Throttle({ rate: singleRate });
+        this.logger.log(
+          `[${method}] 白嫖入限速! (${ip}) => ${memePath}
+          `,
+        );
         stream.pipe(throttle).pipe(res);
       }
     } catch (e) {