なんかもうめっちゃ変えた

packages/backend/src/server/FileServerService.ts

@@ -0,0 +1,178 @@
+import * as fs from 'node:fs';
+import { fileURLToPath } from 'node:url';
+import { dirname } from 'node:path';
+import { Inject, Injectable } from '@nestjs/common';
+import Koa from 'koa';
+import cors from '@koa/cors';
+import Router from '@koa/router';
+import send from 'koa-send';
+import rename from 'rename';
+import { Config } from '@/config.js';
+import { DriveFilesRepository } from '@/models/index.js';
+import { DI } from '@/di-symbols.js';
+import { createTemp } from '@/misc/create-temp.js';
+import { FILE_TYPE_BROWSERSAFE } from '@/const.js';
+import { StatusError } from '@/misc/status-error.js';
+import Logger from '@/logger.js';
+import { DownloadService } from '@/core/DownloadService.js';
+import { ImageProcessingService } from '@/core/ImageProcessingService.js';
+import { VideoProcessingService } from '@/core/VideoProcessingService.js';
+import { InternalStorageService } from '@/core/InternalStorageService.js';
+import { contentDisposition } from '@/misc/content-disposition.js';
+import { FileInfoService } from '@/core/FileInfoService.js';
+
+const serverLogger = new Logger('server', 'gray', false);
+
+const _filename = fileURLToPath(import.meta.url);
+const _dirname = dirname(_filename);
+
+const assets = `${_dirname}/../../server/file/assets/`;
+
+const commonReadableHandlerGenerator = (ctx: Koa.Context) => (e: Error): void => {
+	serverLogger.error(e);
+	ctx.status = 500;
+	ctx.set('Cache-Control', 'max-age=300');
+};
+
+@Injectable()
+export class FileServerService {
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.driveFilesRepository)
+		private driveFilesRepository: DriveFilesRepository,
+
+		private fileInfoService: FileInfoService,
+		private downloadService: DownloadService,
+		private imageProcessingService: ImageProcessingService,
+		private videoProcessingService: VideoProcessingService,
+		private internalStorageService: InternalStorageService,
+	) {
+	}
+
+	public createServer() {
+		const app = new Koa();
+		app.use(cors());
+		app.use(async (ctx, next) => {
+			ctx.set('Content-Security-Policy', 'default-src \'none\'; img-src \'self\'; media-src \'self\'; style-src \'unsafe-inline\'');
+			await next();
+		});
+
+		// Init router
+		const router = new Router();
+
+		router.get('/app-default.jpg', ctx => {
+			const file = fs.createReadStream(`${_dirname}/assets/dummy.png`);
+			ctx.body = file;
+			ctx.set('Content-Type', 'image/jpeg');
+			ctx.set('Cache-Control', 'max-age=31536000, immutable');
+		});
+
+		router.get('/:key', ctx => this.#sendDriveFile(ctx));
+		router.get('/:key/(.*)', ctx => this.#sendDriveFile(ctx));
+
+		// Register router
+		app.use(router.routes());
+
+		return app;
+	}
+
+	async #sendDriveFile(ctx: Koa.Context) {
+		const key = ctx.params.key;
+
+		// Fetch drive file
+		const file = await this.driveFilesRepository.createQueryBuilder('file')
+			.where('file.accessKey = :accessKey', { accessKey: key })
+			.orWhere('file.thumbnailAccessKey = :thumbnailAccessKey', { thumbnailAccessKey: key })
+			.orWhere('file.webpublicAccessKey = :webpublicAccessKey', { webpublicAccessKey: key })
+			.getOne();
+
+		if (file == null) {
+			ctx.status = 404;
+			ctx.set('Cache-Control', 'max-age=86400');
+			await send(ctx as any, '/dummy.png', { root: assets });
+			return;
+		}
+
+		const isThumbnail = file.thumbnailAccessKey === key;
+		const isWebpublic = file.webpublicAccessKey === key;
+
+		if (!file.storedInternal) {
+			if (file.isLink && file.uri) {	// 期限切れリモートファイル
+				const [path, cleanup] = await createTemp();
+
+				try {
+					await this.downloadService.downloadUrl(file.uri, path);
+
+					const { mime, ext } = await this.fileInfoService.detectType(path);
+
+					const convertFile = async () => {
+						if (isThumbnail) {
+							if (['image/jpeg', 'image/webp', 'image/png', 'image/svg+xml'].includes(mime)) {
+								return await this.imageProcessingService.convertToWebp(path, 498, 280);
+							} else if (mime.startsWith('video/')) {
+								return await this.videoProcessingService.generateVideoThumbnail(path);
+							}
+						}
+
+						if (isWebpublic) {
+							if (['image/svg+xml'].includes(mime)) {
+								return await this.imageProcessingService.convertToPng(path, 2048, 2048);
+							}
+						}
+
+						return {
+							data: fs.readFileSync(path),
+							ext,
+							type: mime,
+						};
+					};
+
+					const image = await convertFile();
+					ctx.body = image.data;
+					ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(image.type) ? image.type : 'application/octet-stream');
+					ctx.set('Cache-Control', 'max-age=31536000, immutable');
+				} catch (err) {
+					serverLogger.error(`${err}`);
+
+					if (err instanceof StatusError && err.isClientError) {
+						ctx.status = err.statusCode;
+						ctx.set('Cache-Control', 'max-age=86400');
+					} else {
+						ctx.status = 500;
+						ctx.set('Cache-Control', 'max-age=300');
+					}
+				} finally {
+					cleanup();
+				}
+				return;
+			}
+
+			ctx.status = 204;
+			ctx.set('Cache-Control', 'max-age=86400');
+			return;
+		}
+
+		if (isThumbnail || isWebpublic) {
+			const { mime, ext } = await this.fileInfoService.detectType(this.internalStorageService.resolvePath(key));
+			const filename = rename(file.name, {
+				suffix: isThumbnail ? '-thumb' : '-web',
+				extname: ext ? `.${ext}` : undefined,
+			}).toString();
+
+			ctx.body = this.internalStorageService.read(key);
+			ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(mime) ? mime : 'application/octet-stream');
+			ctx.set('Cache-Control', 'max-age=31536000, immutable');
+			ctx.set('Content-Disposition', contentDisposition('inline', filename));
+		} else {
+			const readable = this.internalStorageService.read(file.accessKey!);
+			readable.on('error', commonReadableHandlerGenerator(ctx));
+			ctx.body = readable;
+			ctx.set('Content-Type', FILE_TYPE_BROWSERSAFE.includes(file.type) ? file.type : 'application/octet-stream');
+			ctx.set('Cache-Control', 'max-age=31536000, immutable');
+			ctx.set('Content-Disposition', contentDisposition('inline', file.name));
+		}
+	}
+}
+