pureimageの代わりに@napi-rs/canvasを使う (#13748)

* pureimageの代わりに@napi-rs/canvasを使う

* remove writestream

* remove createtemp

packages/backend/package.json

@@ -81,6 +81,7 @@
 		"@fastify/view": "9.0.0",
 		"@misskey-dev/sharp-read-bmp": "1.2.0",
 		"@misskey-dev/summaly": "5.1.0",
+		"@napi-rs/canvas": "^0.1.52",
 		"@nestjs/common": "10.3.8",
 		"@nestjs/core": "10.3.8",
 		"@nestjs/testing": "10.3.8",
@@ -153,7 +154,6 @@
 		"promise-limit": "2.7.0",
 		"pug": "3.0.2",
 		"punycode": "2.3.1",
-		"pureimage": "0.3.17",
 		"qrcode": "1.5.3",
 		"random-seed": "0.3.0",
 		"ratelimiter": "3.4.1",

packages/backend/src/misc/gen-identicon.ts

@@ -8,9 +8,8 @@
  * https://en.wikipedia.org/wiki/Identicon
  */
 
-import * as p from 'pureimage';
+import { createCanvas } from '@napi-rs/canvas';
 import gen from 'random-seed';
-import type { WriteStream } from 'node:fs';
 
 const size = 128; // px
 const n = 5; // resolution
@@ -45,9 +44,9 @@ const sideN = Math.floor(n / 2);
 /**
  * Generate buffer of an identicon by seed
  */
-export function genIdenticon(seed: string, stream: WriteStream): Promise<void> {
+export async function genIdenticon(seed: string): Promise<Buffer> {
 	const rand = gen.create(seed);
-	const canvas = p.make(size, size, undefined);
+	const canvas = createCanvas(size, size);
 	const ctx = canvas.getContext('2d');
 
 	const bgColors = colors[rand(colors.length)];
@@ -101,5 +100,5 @@ export function genIdenticon(seed: string, stream: WriteStream): Promise<void> {
 		}
 	}
 
-	return p.encodePNGToStream(canvas, stream);
+	return await canvas.encode('png');
 }

packages/backend/src/server/ServerService.ts

@@ -18,7 +18,6 @@ import { DI } from '@/di-symbols.js';
 import type Logger from '@/logger.js';
 import * as Acct from '@/misc/acct.js';
 import { genIdenticon } from '@/misc/gen-identicon.js';
-import { createTemp } from '@/misc/create-temp.js';
 import { UserEntityService } from '@/core/entities/UserEntityService.js';
 import { LoggerService } from '@/core/LoggerService.js';
 import { bindThis } from '@/decorators.js';
@@ -192,9 +191,7 @@ export class ServerService implements OnApplicationShutdown {
 			reply.header('Cache-Control', 'public, max-age=86400');
 
 			if ((await this.metaService.fetch()).enableIdenticonGeneration) {
-				const [temp, cleanup] = await createTemp();
-				await genIdenticon(request.params.x, fs.createWriteStream(temp));
-				return fs.createReadStream(temp).on('close', () => cleanup());
+				return await genIdenticon(request.params.x);
 			} else {
 				return reply.redirect('/static-assets/avatar.png');
 			}