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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 | /** * 统一存储服务 * 支持 OSS 和本地存储的无缝切换 */ import { ossService } from './oss.service'; import path from 'path'; import fs from 'fs'; import { v4 as uuidv4 } from 'uuid'; export type StorageType = 'oss' | 'local'; class StorageService { private storageType: StorageType; constructor() { // 从环境变量读取存储类型，默认 local this.storageType = (process.env.STORAGE_TYPE as StorageType) || 'local'; console.log(`[Storage] 当前存储模式: ${this.storageType}`); } /** * 切换存储类型 */ setStorageType(type: StorageType) { this.storageType = type; console.log(`[Storage] 存储模式已切换为: ${type}`); } /** * 获取当前存储类型 */ getStorageType(): StorageType { return this.storageType; } /** * 上传音频文件 * @param localPath 本地文件路径 * @param audioId 音频 ID * @returns 文件 URL */ async uploadAudio(localPath: string, audioId: string): Promise<string> { if (this.storageType === 'oss') { return await ossService.uploadAudio(localPath, audioId); } else { return this.uploadToLocal(localPath, 'audio', audioId); } } /** * 上传视频文件 * @param localPath 本地文件路径 * @param videoId 视频 ID * @returns 文件 URL */ async uploadVideo(localPath: string, videoId: string): Promise<string> { if (this.storageType === 'oss') { return await ossService.uploadVideo(localPath, videoId); } else { return this.uploadToLocal(localPath, 'video', videoId); } } /** * 上传封面图片 * @param localPath 本地文件路径 * @param bookId 书籍 ID * @returns 文件 URL */ async uploadCover(localPath: string, bookId: string | number): Promise<string> { if (this.storageType === 'oss') { return await ossService.uploadCover(localPath, bookId); } else { return this.uploadToLocal(localPath, 'cover', String(bookId)); } } /** * 上传通用文件 * @param localPath 本地文件路径 * @param category 分类（audio/video/cover/material） * @param id ID * @returns 文件 URL */ async uploadFile(localPath: string, category: string, id: string): Promise<string> { if (this.storageType === 'oss') { const objectKey = `${category}/${id}/${path.basename(localPath)}`; return await ossService.uploadFile(localPath, objectKey); } else { return this.uploadToLocal(localPath, category, id); } } /** * 上传 Buffer * @param buffer 文件 Buffer * @param objectKey 对象键 * @param contentType 内容类型 * @returns 文件 URL */ async uploadBuffer(buffer: Buffer, objectKey: string, contentType?: string): Promise<string> { if (this.storageType === 'oss') { return await ossService.uploadBuffer(buffer, objectKey, contentType); } else { // 本地存储：保存到 uploads 目录 const filePath = path.join(process.cwd(), 'uploads', objectKey); const dir = path.dirname(filePath); if (!fs.existsSync(dir)) { fs.mkdirSync(dir, { recursive: true }); } fs.writeFileSync(filePath, buffer); return `/uploads/${objectKey}`; } } /** * 删除文件 * @param url 文件 URL 或路径 */ async deleteFile(url: string): Promise<void> { if (this.storageType === 'oss') { // 从 URL 提取 objectKey const objectKey = this.extractObjectKey(url); if (objectKey) { await ossService.deleteFile(objectKey); } } else { // 本地存储：删除文件 const filePath = this.urlToLocalPath(url); if (fs.existsSync(filePath)) { fs.unlinkSync(filePath); } } } /** * 删除整个目录 * @param prefix 目录前缀或分类 * @param id ID */ async deleteDirectory(prefix: string, id: string): Promise<void> { if (this.storageType === 'oss') { await ossService.deleteDirectory(`${prefix}/${id}`); } else { const dirPath = path.join(process.cwd(), 'uploads', prefix, id); if (fs.existsSync(dirPath)) { fs.rmSync(dirPath, { recursive: true, force: true }); } } } /** * 下载文件（用于音频下载功能） * @param url 文件 URL * @returns 文件 Buffer */ async downloadFile(url: string): Promise<Buffer> { if (this.storageType === 'oss') { // OSS：从 OSS 下载 const objectKey = this.extractObjectKey(url); if (!objectKey) { throw new Error('无效的 OSS URL'); } return await ossService.downloadFile(objectKey); } else { // 本地存储：读取本地文件 const filePath = this.urlToLocalPath(url); if (!fs.existsSync(filePath)) { throw new Error('文件不存在'); } return fs.readFileSync(filePath); } } /** * 获取签名 URL（仅 OSS 支持） * @param url 文件 URL * @param expires 过期时间（秒） * @returns 签名 URL */ async getSignedUrl(url: string, expires: number = 3600): Promise<string> { if (this.storageType === 'oss') { const objectKey = this.extractObjectKey(url); if (objectKey) { return await ossService.getSignedUrl(objectKey, expires); } } // 本地存储直接返回原 URL return url; } /** * 本地存储：上传文件 */ private uploadToLocal(localPath: string, category: string, id: string): string { const uploadDir = path.join(process.cwd(), 'uploads', category, id); // 确保目录存在 if (!fs.existsSync(uploadDir)) { fs.mkdirSync(uploadDir, { recursive: true }); } // 复制文件 const filename = path.basename(localPath); const destPath = path.join(uploadDir, filename); fs.copyFileSync(localPath, destPath); // 返回访问 URL return `/uploads/${category}/${id}/${filename}`; } /** * 从 URL 提取 objectKey */ private extractObjectKey(url: string): string | null { if (!url) return null; // OSS URL 格式: https://bucket.endpoint/objectKey if (url.includes('aliyuncs.com') || url.includes('oss-')) { try { const urlObj = new URL(url); return urlObj.pathname.substring(1); // 去掉开头的 / } catch { return null; } } // 本地 URL 格式: /uploads/category/id/filename if (url.startsWith('/uploads/')) { return url.substring('/uploads/'.length); } return null; } /** * URL 转本地路径 */ private urlToLocalPath(url: string): string { if (url.startsWith('/uploads/')) { return path.join(process.cwd(), 'uploads', url.substring('/uploads/'.length)); } return url; } /** * 测试存储连接 */ async testConnection(): Promise<boolean> { if (this.storageType === 'oss') { return await ossService.testConnection(); } else { // 测试本地存储 const testDir = path.join(process.cwd(), 'uploads'); try { if (!fs.existsSync(testDir)) { fs.mkdirSync(testDir, { recursive: true }); } const testFile = path.join(testDir, '.test'); fs.writeFileSync(testFile, 'test'); fs.unlinkSync(testFile); console.log('[Storage] 本地存储测试成功'); return true; } catch (error) { console.error('[Storage] 本地存储测试失败:', error); return false; } } } } // 导出单例 export const storageService = new StorageService(); export default storageService; |