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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 | import OSS from 'ali-oss'; import path from 'path'; import fs from 'fs'; interface OSSConfig { region: string; accessKeyId: string; accessKeySecret: string; bucket: string; endpoint?: string; } class OSSService { private client: OSS; private bucket: string; private cdnDomain?: string; constructor() { const config: OSSConfig = { region: process.env.OSS_REGION || 'oss-cn-hangzhou', accessKeyId: process.env.OSS_ACCESS_KEY_ID || '', accessKeySecret: process.env.OSS_ACCESS_KEY_SECRET || '', bucket: process.env.OSS_BUCKET_NAME || '', endpoint: process.env.OSS_ENDPOINT || 'oss-cn-hangzhou.aliyuncs.com', }; this.client = new OSS(config); this.bucket = config.bucket; this.cdnDomain = process.env.OSS_CDN_DOMAIN; } /** * 上传文件到 OSS * @param localPath 本地文件路径 * @param objectKey OSS 对象键（路径） * @returns OSS 文件 URL */ async uploadFile(localPath: string, objectKey: string): Promise<string> { try { // 确保 objectKey 格式正确 const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); const result = await this.client.put(normalizedKey, localPath, { headers: { 'Content-Type': this.getContentType(normalizedKey), }, }); console.log(`[OSS] 文件上传成功: ${normalizedKey}`); // 返回文件 URL return this.getFileUrl(normalizedKey); } catch (error) { console.error('[OSS] 文件上传失败:', error); throw new Error(`OSS 上传失败: ${(error as Error).message}`); } } /** * 上传 Buffer 到 OSS * @param buffer 文件 Buffer * @param objectKey OSS 对象键 * @param contentType 内容类型 * @returns OSS 文件 URL */ async uploadBuffer(buffer: Buffer, objectKey: string, contentType?: string): Promise<string> { try { const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); const result = await this.client.put(normalizedKey, buffer, { headers: { 'Content-Type': contentType || this.getContentType(normalizedKey), }, }); console.log(`[OSS] Buffer 上传成功: ${normalizedKey}`); return this.getFileUrl(normalizedKey); } catch (error) { console.error('[OSS] Buffer 上传失败:', error); throw new Error(`OSS Buffer 上传失败: ${(error as Error).message}`); } } /** * 上传音频文件 * @param localPath 本地音频文件路径 * @param audioId 音频 ID * @returns OSS 音频 URL */ async uploadAudio(localPath: string, audioId: string): Promise<string> { const objectKey = `audio/${audioId}/${path.basename(localPath)}`; return this.uploadFile(localPath, objectKey); } /** * 上传视频文件 * @param localPath 本地视频文件路径 * @param videoId 视频 ID * @returns OSS 视频 URL */ async uploadVideo(localPath: string, videoId: string): Promise<string> { const objectKey = `video/${videoId}/${path.basename(localPath)}`; return this.uploadFile(localPath, objectKey); } /** * 上传封面图片 * @param localPath 本地图片路径 * @param bookId 书籍 ID * @returns OSS 图片 URL */ async uploadCover(localPath: string, bookId: string | number): Promise<string> { const ext = path.extname(localPath); const objectKey = `cover/${bookId}/cover${ext}`; return this.uploadFile(localPath, objectKey); } /** * 删除文件 * @param objectKey OSS 对象键 */ async deleteFile(objectKey: string): Promise<void> { try { const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); await this.client.delete(normalizedKey); console.log(`[OSS] 文件删除成功: ${normalizedKey}`); } catch (error) { console.error('[OSS] 文件删除失败:', error); throw new Error(`OSS 删除失败: ${(error as Error).message}`); } } /** * 删除整个目录 * @param prefix 目录前缀 */ async deleteDirectory(prefix: string): Promise<void> { try { const normalizedPrefix = prefix.replace(/\\/g, '/').replace(/^\/+/, '').replace(/\/+$/, '') + '/'; // 列出目录下所有文件 const result = await this.client.list({ prefix: normalizedPrefix, 'max-keys': 1000, }); // 批量删除 if (result.objects && result.objects.length > 0) { const keys = result.objects.map(obj => obj.name); await this.client.deleteMulti(keys); console.log(`[OSS] 目录删除成功: ${normalizedPrefix} (${keys.length} 个文件)`); } } catch (error) { console.error('[OSS] 目录删除失败:', error); throw new Error(`OSS 目录删除失败: ${(error as Error).message}`); } } /** * 获取文件签名 URL（用于私有 bucket） * @param objectKey OSS 对象键 * @param expires 过期时间（秒），默认 3600 秒 * @returns 签名 URL */ async getSignedUrl(objectKey: string, expires: number = 3600): Promise<string> { try { const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); const url = this.client.signatureUrl(normalizedKey, { expires, }); return url; } catch (error) { console.error('[OSS] 获取签名 URL 失败:', error); throw new Error(`获取签名 URL 失败: ${(error as Error).message}`); } } /** * 下载文件 * @param objectKey OSS 对象键 * @returns 文件 Buffer */ async downloadFile(objectKey: string): Promise<Buffer> { try { const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); const result = await this.client.get(normalizedKey); return result.content; } catch (error) { console.error('[OSS] 文件下载失败:', error); throw new Error(`OSS 文件下载失败: ${(error as Error).message}`); } } /** * 获取文件 URL * @param objectKey OSS 对象键 * @returns 文件 URL */ getFileUrl(objectKey: string): string { const normalizedKey = objectKey.replace(/\\/g, '/').replace(/^\/+/, ''); // 如果配置了 CDN 域名，使用 CDN if (this.cdnDomain) { return `${this.cdnDomain}/${normalizedKey}`; } // 否则使用 OSS 默认域名 return `https://${this.bucket}.${process.env.OSS_ENDPOINT}/${normalizedKey}`; } /** * 根据文件扩展名获取 Content-Type * @param filename 文件名 * @returns Content-Type */ private getContentType(filename: string): string { const ext = path.extname(filename).toLowerCase(); const contentTypes: Record<string, string> = { '.mp3': 'audio/mpeg', '.wav': 'audio/wav', '.aac': 'audio/aac', '.mp4': 'video/mp4', '.avi': 'video/avi', '.mov': 'video/quicktime', '.jpg': 'image/jpeg', '.jpeg': 'image/jpeg', '.png': 'image/png', '.gif': 'image/gif', '.webp': 'image/webp', '.json': 'application/json', '.txt': 'text/plain', }; return contentTypes[ext] || 'application/octet-stream'; } /** * 测试 OSS 连接 */ async testConnection(): Promise<boolean> { try { await this.client.getBucketInfo(this.bucket); console.log('[OSS] 连接测试成功'); return true; } catch (error) { console.error('[OSS] 连接测试失败:', error); return false; } } } // 导出单例 export const ossService = new OSSService(); export default ossService; |