809 lines
No EOL
24 KiB
JavaScript
809 lines
No EOL
24 KiB
JavaScript
/**
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* 腾讯云COS管理器 - 完整版
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* 支持MD5去重、文件记录保存、头像上传和动态图片上传两种场景
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* 参考文档: https://cloud.tencent.com/document/product/436/31953
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*/
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const COS = require('../dist/cos-wx-sdk-v5.min.js');
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const config = require('../config/config.js');
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const apiClient = require('./api-client.js');
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const errorHandler = require('./error-handler.js');
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const SparkMD5 = require('../dist/spark-md5.min.js');
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class COSManager {
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constructor() {
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this.cosInstance = null;
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this.credentials = null; // 缓存的临时密钥（兼容旧代码）
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this.credentialsExpireTime = 0; // 密钥过期时间（兼容旧代码）
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this.credentialsCache = {}; // 按 fileType 缓存的临时密钥 { fileType: { credentials, expireTime } }
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this.currentFileType = null; // 当前正在上传的文件类型
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this.isInitialized = false;
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}
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/**
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* 初始化COS实例
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*/
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init() {
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if (this.isInitialized && this.cosInstance) {
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return;
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}
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try {
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this.cosInstance = new COS({
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// 强烈推荐: 高级上传内部对小文件使用putObject
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SimpleUploadMethod: 'putObject',
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getAuthorization: (options, callback) => {
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// 使用当前正在上传的文件类型，而不是从 options.Scope 获取
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// 因为 options.Scope?.[0]?.action 可能不是我们期望的 fileType
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const fileType = this.currentFileType || 'image';
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// 从后端获取临时密钥
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this.getCredentials(fileType)
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.then(credentials => {
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callback({
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TmpSecretId: credentials.tmpSecretId,
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TmpSecretKey: credentials.tmpSecretKey,
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SecurityToken: credentials.sessionToken,
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StartTime: credentials.startTime,
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ExpiredTime: credentials.expiredTime
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});
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})
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.catch(error => {
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console.error('[COS] 获取临时密钥失败:', error);
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callback({
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TmpSecretId: '',
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TmpSecretKey: '',
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SecurityToken: '',
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StartTime: 0,
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ExpiredTime: 0
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});
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});
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}
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});
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this.isInitialized = true;
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console.log('[COS] 初始化成功');
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} catch (error) {
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console.error('[COS] 初始化失败:', error);
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errorHandler.handleError(error, {
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action: 'cos_init',
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showToast: true
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});
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throw error;
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}
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}
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/**
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* 获取临时密钥
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* @param {string} fileType - 文件类型 (image/video/audio/file/avatar)
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* @returns {Promise<Object>} 临时密钥信息
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*/
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async getCredentials(fileType = 'image') {
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try {
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// 检查按 fileType 缓存的密钥是否还有效(提前5分钟过期)
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const now = Math.floor(Date.now() / 1000);
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const cached = this.credentialsCache[fileType];
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if (cached && cached.credentials && cached.expireTime > now + 300) {
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// 验证缓存的密钥是否完整
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const creds = cached.credentials;
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if (creds.tmpSecretId && creds.tmpSecretKey && creds.sessionToken) {
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console.log(`[COS] 使用缓存的 ${fileType} 临时密钥`);
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return creds;
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} else {
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// 缓存的密钥不完整，清除缓存
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console.warn(`[COS] 缓存的 ${fileType} 临时密钥不完整，重新获取`);
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delete this.credentialsCache[fileType];
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}
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}
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// 从后端获取新的临时密钥
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console.log(`[COS] 获取新的 ${fileType} 临时密钥`);
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const response = await apiClient.get(config.cos.stsUrl, { fileType });
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if (response.code === 200 && response.data) {
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const credentials = response.data;
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// 验证返回的密钥是否完整
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if (!credentials.tmpSecretId || !credentials.tmpSecretKey || !credentials.sessionToken) {
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throw new Error('临时密钥数据不完整');
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}
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// 按 fileType 缓存密钥
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this.credentialsCache[fileType] = {
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credentials: credentials,
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expireTime: credentials.expiredTime
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};
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// 兼容旧代码：也更新全局 credentials
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this.credentials = credentials;
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this.credentialsExpireTime = credentials.expiredTime;
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return credentials;
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}
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throw new Error(response.message || '获取临时密钥失败');
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} catch (error) {
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console.error('[COS] 获取临时密钥失败:', error);
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// 清除可能损坏的缓存
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if (this.credentialsCache[fileType]) {
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delete this.credentialsCache[fileType];
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}
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throw error;
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}
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}
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/**
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* 计算文件MD5
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* @param {string} filePath - 微信临时文件路径
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* @returns {Promise<string>} MD5值
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*/
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async calculateMD5(filePath) {
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return new Promise((resolve, reject) => {
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try {
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const fileSystemManager = wx.getFileSystemManager();
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// 读取文件内容
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fileSystemManager.readFile({
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filePath,
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success: (res) => {
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try {
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// 使用SparkMD5计算MD5
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const spark = new SparkMD5.ArrayBuffer();
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spark.append(res.data);
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const md5 = spark.end();
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resolve(md5);
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} catch (error) {
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console.error('[COS] MD5计算失败:', error);
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reject(error);
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}
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},
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fail: (error) => {
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console.error('[COS] 读取文件失败:', error);
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reject(error);
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}
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});
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} catch (error) {
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console.error('[COS] 计算MD5异常:', error);
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reject(error);
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}
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});
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}
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/**
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* 检查文件是否已存在(用于去重)
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* @param {string} md5Hash - 文件MD5值
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* @returns {Promise<Object>} 检查结果 {exists, fileUrl, fileId, fileSize}
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*/
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async checkFileExists(md5Hash) {
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try {
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const response = await apiClient.post(config.cos.fileCheckUrl, { md5Hash });
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if (response.code === 200 && response.data) {
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return response.data;
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}
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return { exists: false };
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} catch (error) {
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console.error('[COS] 检查文件存在性失败:', error);
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// 检查失败不影响上传流程,返回不存在
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return { exists: false };
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}
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}
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/**
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* 保存文件记录到后端
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* @param {Object} fileInfo - 文件信息
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* @returns {Promise<Object>} 保存结果
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*/
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async saveFileRecord(fileInfo) {
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try {
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const response = await apiClient.post(config.cos.fileRecordUrl, fileInfo);
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if (response.code === 200) {
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return response.data;
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}
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throw new Error(response.message || '保存文件记录失败');
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} catch (error) {
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console.error('[COS] 保存文件记录失败:', error);
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throw error;
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}
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}
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/**
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* 生成文件路径
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* @param {string} fileName - 原始文件名
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* @param {string} fileType - 文件类型
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* @param {number} userId - 用户ID
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* @returns {string} 完整文件路径
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*/
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generateFilePath(fileName, fileType, userId) {
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const timestamp = Math.floor(Date.now() / 1000);
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// 路径格式: user/{userId}/{fileType}/{timestamp}_{fileName}
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return `user/${userId}/${fileType}/${timestamp}_${fileName}`;
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}
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/**
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* 生成文件URL
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* @param {string} objectPath - 对象路径
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* @returns {string} 完整URL
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*/
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generateFileUrl(objectPath) {
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const { bucket, region } = config.cos;
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return `https://${bucket}.cos.${region}.myqcloud.com/${objectPath}`;
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}
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/**
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* 生成极致压缩的图片URL - 腾讯云COS图片处理
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* 确保压缩到10KB以内
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* @param {string} objectPath - 对象路径
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* @param {Object} options - 压缩选项
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* @returns {string} 压缩后的图片URL
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*/
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generateUltraCompressedImageUrl(objectPath, options = {}) {
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const { bucket, region } = config.cos;
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return `https://${bucket}.cos.${region}.myqcloud.com/${objectPath}`;
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}
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/**
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* 本地预压缩到10KB以内 - 使用微信canvas
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* @param {string} filePath - 原始图片路径
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* @param {Object} options - 压缩选项
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* @returns {Promise<string>} 压缩后的临时文件路径
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*/
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async compressToUnder10KB(filePath, options = {}) {
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return new Promise((resolve, reject) => {
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const {
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maxWidth = 400,
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maxHeight = 400,
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maxAttempts = 3, // 最大尝试次数
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targetSize = 500 * 1024 // 目标大小：10KB
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} = options;
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console.log('[DEBUG] 解构后的targetSize:', targetSize);
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let attempt = 0;
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let currentQuality = 0.9; // 起始质量30%
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const tryCompress = () => {
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attempt++;
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if (attempt > maxAttempts) {
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reject(new Error(`无法压缩到10KB以内，最小体积: ${lastSize}字节`));
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return;
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}
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wx.getImageInfo({
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src: filePath,
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success: (imageInfo) => {
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const { width: originalWidth, height: originalHeight } = imageInfo;
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// 计算压缩尺寸
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let targetWidth = originalWidth;
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let targetHeight = originalHeight;
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if (originalWidth > maxWidth || originalHeight > maxHeight) {
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const ratio = Math.min(maxWidth / originalWidth, maxHeight / originalHeight);
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targetWidth = Math.floor(originalWidth * ratio);
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targetHeight = Math.floor(originalHeight * ratio);
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}
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// 创建离屏canvas
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const canvas = wx.createOffscreenCanvas({
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type: '2d',
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width: targetWidth,
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height: targetHeight
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});
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const ctx = canvas.getContext('2d');
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// 创建图片对象
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const image = canvas.createImage();
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image.onload = () => {
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// 绘制到canvas
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ctx.clearRect(0, 0, targetWidth, targetHeight);
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ctx.drawImage(image, 0, 0, targetWidth, targetHeight);
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// 转换为临时文件
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wx.canvasToTempFilePath({
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canvas: canvas,
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quality: currentQuality,
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fileType: 'jpg', // 使用jpg格式，压缩效果更好
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success: async (res) => {
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try {
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// 获取文件大小
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const fileInfo = await this.getFileInfo(res.tempFilePath);
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console.log(`[COS] 压缩尝试 ${attempt}: 质量${currentQuality}, 输入的targetSize:${targetSize},尺寸${targetWidth}x${targetHeight}, 大小${fileInfo.size}字节`);
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if (fileInfo.size <= targetSize) {
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// 达到目标大小
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resolve(res.tempFilePath);
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} else {
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// 继续压缩：降低质量
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currentQuality = Math.max(0.1, currentQuality * 0.9); // 质量降低40%
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tryCompress();
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}
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} catch (error) {
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reject(error);
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}
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},
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fail: (err) => {
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reject(new Error(`canvas转换失败: ${err.errMsg}`));
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}
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}, this);
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};
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image.onerror = () => {
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reject(new Error('图片加载失败'));
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};
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image.src = filePath;
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},
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fail: (err) => {
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reject(new Error(`获取图片信息失败: ${err.errMsg}`));
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}
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});
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};
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tryCompress();
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});
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}
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/**
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* 核心上传方法 - 统一接口
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* @param {string|string[]} filePath - 文件路径(单个或数组)
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* @param {Object} options - 上传配置
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* @param {string} options.fileType - 文件类型: 'avatar'|'image'|'video'|'audio' (默认'image')
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* @param {boolean} options.enableDedup - 是否去重 (默认false)
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* @param {boolean} options.enableCompress - 是否启用极致压缩到10KB以内 (默认false)
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* @param {Object} options.compressOptions - 压缩配置
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* @param {Function} options.onProgress - 进度回调
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* @returns {Promise<Object|Array>} 上传结果(单个对象或数组)
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*/
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async upload(filePath, {
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fileType = 'image',
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enableDedup = false,
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enableCompress = false,
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compressOptions = {},
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onProgress
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} = {}) {
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// 批量上传
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if (Array.isArray(filePath)) {
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return this._uploadMultiple(filePath, {
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fileType,
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enableDedup,
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enableCompress,
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compressOptions,
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onProgress
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});
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}
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// 单文件上传
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return this._uploadSingle(filePath, {
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fileType,
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enableDedup,
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enableCompress,
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compressOptions,
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onProgress
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});
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}
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/**
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* 单文件上传(内部方法)
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*/
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async _uploadSingle(filePath, { fileType, enableDedup, enableCompress, compressOptions, onProgress }) {
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try {
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if (!this.isInitialized) this.init();
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const userId = this._getUserId();
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let finalFilePath = filePath;
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let isCompressed = false;
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console.log("cos-manager--->","enableCompress1: "+enableCompress+" compressOptions "+compressOptions+" fileUrl: "+fileUrl);
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// 极致压缩处理（仅对图片）
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if (enableCompress && this._isImageFile(filePath)) {
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try {
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finalFilePath = await this.compressToUnder10KB(filePath, compressOptions);
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isCompressed = true;
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console.log('[COS] 图片极致压缩完成');
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} catch (compressError) {
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console.warn('[COS] 图片极致压缩失败,使用原文件:', compressError);
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// 压缩失败时使用原文件
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finalFilePath = filePath;
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}
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}
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const fileName = finalFilePath.split('/').pop();
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const fileInfo = await this.getFileInfo(finalFilePath);
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// 去重检查
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if (enableDedup) {
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const dedupResult = await this._handleDedup(finalFilePath);
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if (dedupResult) {
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// 如果压缩过，清理临时文件
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if (isCompressed && finalFilePath !== filePath) {
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this._cleanupTempFile(finalFilePath);
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}
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return {
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...dedupResult,
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isCompressed: false // 去重文件不进行压缩
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};
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}
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}
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// 上传流程
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const { objectPath, fileUrl, md5Hash } = await this._executeUpload(
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finalFilePath, fileName, fileType, userId, onProgress
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);
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// 生成极致压缩URL（如果启用压缩）
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let compressedUrl = enableCompress && isCompressed ?
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this.generateUltraCompressedImageUrl(objectPath, compressOptions) : fileUrl;
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// 确定usageType(用于后端自动处理)
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const usageType = fileType === 'avatar' ? 'avatar' : 'feed';
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console.log("cos-manager--->","enableCompress: "+enableCompress+" compressedUrl "+compressedUrl+" fileUrl: "+fileUrl);
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// 保存记录
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const recordResult = await this._saveRecord({
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fileName,
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fileInfo,
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fileType,
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objectPath,
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fileUrl: compressedUrl,
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originalUrl: fileUrl, // 保存原始URL
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md5Hash,
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usageType,
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relatedId: 0
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});
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// 清理临时压缩文件
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if (isCompressed && finalFilePath !== filePath) {
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this._cleanupTempFile(finalFilePath);
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}
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const finalFileInfo = await this.getFileInfo(finalFilePath);
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return {
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success: true,
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fileUrl: recordResult.fileUrl,
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originalUrl: fileUrl,
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fileId: recordResult.fileId,
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fileSize: finalFileInfo.size,
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md5Hash,
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isDeduped: false,
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isCompressed: enableCompress && isCompressed,
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message: `文件上传成功${enableCompress && isCompressed ? '(已极致压缩到10KB以内)' : ''}`
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};
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} catch (error) {
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console.error('[COS] 上传失败:', error);
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errorHandler.handleError(error, {
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action: 'cos_upload',
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showToast: true,
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toastMessage: '文件上传失败,请重试'
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});
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throw error;
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}
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}
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/**
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* 批量上传(内部方法)
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*/
|
||
async _uploadMultiple(filePaths, { fileType, enableDedup, enableCompress, compressOptions, onProgress }) {
|
||
const results = [];
|
||
const total = filePaths.length;
|
||
|
||
for (let i = 0; i < total; i++) {
|
||
try {
|
||
const result = await this._uploadSingle(filePaths[i], {
|
||
fileType,
|
||
enableDedup,
|
||
enableCompress,
|
||
compressOptions,
|
||
onProgress: (percent) => {
|
||
if (onProgress) {
|
||
onProgress({
|
||
current: i + 1,
|
||
total,
|
||
currentPercent: percent,
|
||
overallPercent: Math.round(((i + percent / 100) / total) * 100)
|
||
});
|
||
}
|
||
}
|
||
});
|
||
results.push(result);
|
||
} catch (error) {
|
||
console.error(`[COS] 文件 ${i + 1} 上传失败:`, error);
|
||
results.push({
|
||
success: false,
|
||
error: error.message || '上传失败'
|
||
});
|
||
}
|
||
}
|
||
|
||
return results;
|
||
}
|
||
|
||
// ==================== 内部辅助方法 ====================
|
||
|
||
/**
|
||
* 获取用户ID
|
||
*/
|
||
_getUserId() {
|
||
const userInfo = wx.getStorageSync('userInfo');
|
||
const customId = userInfo.user?.customId;
|
||
if (!userInfo || !customId) {
|
||
throw new Error('用户未登录');
|
||
}
|
||
return customId;
|
||
}
|
||
|
||
/**
|
||
* 处理去重逻辑
|
||
*/
|
||
async _handleDedup(filePath) {
|
||
const md5Hash = await this.calculateMD5(filePath);
|
||
const checkResult = await this.checkFileExists(md5Hash);
|
||
|
||
if (checkResult.exists) {
|
||
return {
|
||
success: true,
|
||
fileUrl: checkResult.fileUrl,
|
||
originalUrl: checkResult.fileUrl,
|
||
fileId: checkResult.fileId,
|
||
fileSize: checkResult.fileSize,
|
||
md5Hash,
|
||
isDeduped: true,
|
||
isCompressed: false,
|
||
message: '文件已存在,直接使用'
|
||
};
|
||
}
|
||
return null;
|
||
}
|
||
|
||
/**
|
||
* 执行上传到COS
|
||
*/
|
||
async _executeUpload(filePath, fileName, fileType, userId, onProgress) {
|
||
// 设置当前正在上传的文件类型，供 getAuthorization 回调使用
|
||
this.currentFileType = fileType;
|
||
|
||
try {
|
||
// 先获取对应 fileType 的临时密钥（确保在上传前获取）
|
||
const credentials = await this.getCredentials(fileType);
|
||
|
||
// 验证临时密钥是否有效
|
||
if (!credentials || !credentials.tmpSecretId || !credentials.tmpSecretKey || !credentials.sessionToken) {
|
||
throw new Error('临时密钥无效，请重新获取');
|
||
}
|
||
|
||
const objectPath = this.generateFilePath(fileName, fileType, userId);
|
||
const fileUrl = this.generateFileUrl(objectPath);
|
||
|
||
await this.uploadToCOS({ filePath, key: objectPath, onProgress });
|
||
const md5Hash = await this.calculateMD5(filePath);
|
||
|
||
return { objectPath, fileUrl, md5Hash };
|
||
} catch (error) {
|
||
console.error('[COS] 上传执行失败:', error);
|
||
// 清除缓存的临时密钥，强制下次重新获取
|
||
if (this.credentialsCache[fileType]) {
|
||
delete this.credentialsCache[fileType];
|
||
}
|
||
throw error;
|
||
} finally {
|
||
// 上传完成后清除当前文件类型
|
||
this.currentFileType = null;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 保存文件记录
|
||
*/
|
||
async _saveRecord({ fileName, fileInfo, fileType, objectPath, fileUrl, md5Hash, usageType, relatedId }) {
|
||
return await this.saveFileRecord({
|
||
fileName,
|
||
fileSize: fileInfo.size,
|
||
contentType: fileInfo.type || this.getContentType(fileName),
|
||
fileType,
|
||
objectPath,
|
||
fileUrl,
|
||
md5Hash,
|
||
usageType,
|
||
relatedId
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 检查是否为图片文件
|
||
*/
|
||
_isImageFile(filePath) {
|
||
const imageExts = ['jpg', 'jpeg', 'png', 'gif', 'bmp', 'webp'];
|
||
const ext = filePath.split('.').pop().toLowerCase();
|
||
return imageExts.includes(ext);
|
||
}
|
||
|
||
/**
|
||
* 清理临时文件
|
||
*/
|
||
_cleanupTempFile(filePath) {
|
||
try {
|
||
if (filePath && filePath.startsWith('http://tmp/')) {
|
||
wx.getFileSystemManager().unlink({
|
||
filePath: filePath,
|
||
fail: (err) => {
|
||
console.warn('[COS] 临时文件清理失败:', err);
|
||
}
|
||
});
|
||
}
|
||
} catch (error) {
|
||
console.warn('[COS] 临时文件清理异常:', error);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 直接上传到COS(不经过去重和记录保存)
|
||
*/
|
||
uploadToCOS({ filePath, key, onProgress }) {
|
||
return new Promise((resolve, reject) => {
|
||
this.cosInstance.uploadFile({
|
||
Bucket: config.cos.bucket,
|
||
Region: config.cos.region,
|
||
Key: key,
|
||
FilePath: filePath,
|
||
SliceSize: 1024 * 1024 * 5,
|
||
onProgress: (progressData) => {
|
||
if (onProgress) {
|
||
const percent = Math.round(progressData.percent * 100);
|
||
onProgress(percent);
|
||
}
|
||
}
|
||
}, (err, data) => {
|
||
if (err) {
|
||
console.error('[COS] 上传失败:', err.code, err.message);
|
||
if (err.statusCode === 403 || err.code === 'AccessDenied') {
|
||
console.error('[COS] 权限错误,请检查临时密钥配置');
|
||
}
|
||
reject(err);
|
||
} else {
|
||
resolve(data);
|
||
}
|
||
});
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 批量上传文件
|
||
* @deprecated 请使用 upload(filePaths, options) 代替
|
||
*/
|
||
async uploadFiles(files, options = {}) {
|
||
console.warn('[COS] uploadFiles已废弃,请使用upload()方法');
|
||
const filePaths = files.map(f => f.filePath || f);
|
||
return this.upload(filePaths, options);
|
||
}
|
||
|
||
/**
|
||
* 完整上传方法(保留向后兼容)
|
||
* @deprecated 请使用 upload(filePath, options) 代替
|
||
*/
|
||
async uploadFile(options) {
|
||
console.warn('[COS] uploadFile已废弃,请使用upload()方法');
|
||
const { filePath, fileType = 'image', enableDedup = false, onProgress } = options;
|
||
return this.upload(filePath, { fileType, enableDedup, onProgress });
|
||
}
|
||
|
||
/**
|
||
* 获取文件信息
|
||
* @param {string} filePath - 文件路径
|
||
* @returns {Promise<Object>} 文件信息
|
||
*/
|
||
getFileInfo(filePath) {
|
||
return new Promise((resolve, reject) => {
|
||
wx.getFileInfo({
|
||
filePath,
|
||
success: (res) => {
|
||
const ext = filePath.split('.').pop().toLowerCase();
|
||
const type = this.getContentType('file.' + ext);
|
||
|
||
resolve({
|
||
size: res.size,
|
||
type
|
||
});
|
||
},
|
||
fail: reject
|
||
});
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 根据文件名获取Content-Type
|
||
*/
|
||
getContentType(fileName) {
|
||
const ext = fileName.split('.').pop().toLowerCase();
|
||
const mimeTypes = {
|
||
jpg: 'image/jpeg',
|
||
jpeg: 'image/jpeg',
|
||
png: 'image/png',
|
||
gif: 'image/gif',
|
||
webp: 'image/webp',
|
||
bmp: 'image/bmp',
|
||
mp4: 'video/mp4',
|
||
avi: 'video/x-msvideo',
|
||
mov: 'video/quicktime',
|
||
mp3: 'audio/mpeg',
|
||
wav: 'audio/wav',
|
||
pdf: 'application/pdf',
|
||
txt: 'text/plain',
|
||
json: 'application/json'
|
||
};
|
||
|
||
return mimeTypes[ext] || 'application/octet-stream';
|
||
}
|
||
|
||
/**
|
||
* 删除文件
|
||
*/
|
||
deleteObject(key) {
|
||
return new Promise((resolve, reject) => {
|
||
if (!this.isInitialized) {
|
||
this.init();
|
||
}
|
||
|
||
this.cosInstance.deleteObject({
|
||
Bucket: config.cos.bucket,
|
||
Region: config.cos.region,
|
||
Key: key
|
||
}, (err, data) => {
|
||
if (err) {
|
||
console.error('[COS] 删除文件失败:', err);
|
||
reject(err);
|
||
} else {
|
||
resolve(data);
|
||
}
|
||
});
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 获取文件访问URL
|
||
*/
|
||
getObjectUrl(key, options = {}) {
|
||
if (!this.isInitialized) {
|
||
this.init();
|
||
}
|
||
|
||
return this.cosInstance.getObjectUrl({
|
||
Bucket: config.cos.bucket,
|
||
Region: config.cos.region,
|
||
Key: key,
|
||
Sign: options.sign !== false,
|
||
Expires: options.expires || 3600
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 专门针对10KB以内压缩的上传方法
|
||
* @param {string} filePath - 文件路径
|
||
* @param {Object} options - 选项
|
||
* @returns {Promise<Object>} 上传结果
|
||
*/
|
||
async uploadWithUltraCompression(filePath, options = {}) {
|
||
return this.upload(filePath, {
|
||
fileType: 'image',
|
||
enableCompress: true,
|
||
enableDedup: options.enableDedup || false,
|
||
compressOptions: {
|
||
maxWidth: 400,
|
||
maxHeight: 400,
|
||
targetSize: 20 * 1024, // 10KB
|
||
...options
|
||
}
|
||
});
|
||
}
|
||
}
|
||
|
||
// 导出单例
|
||
const cosManager = new COSManager();
|
||
module.exports = cosManager; |