一、图片压缩
这API目前从小程序开发工具没法调试
得用真机调试
// 压缩开始pressImage({src: tempFilePaths[0], // 图片路径quality: 0, // 压缩质量success: res => {console.log("压缩前：", tempFilePaths[0])console.log("压缩后：", res.tempFilePath)},fail: error => {console.log("error", error)}});// 压缩结束
二、图片上传和审核
方法一：把文件传到云存储，云函数根据fileID获取buffer（得及时删除文件）
小程序端js代码（负责图片上传）：
console.log('my-image' + tempFilePaths[0].match(/\.[^.]+?$/)[0])// 在此添加内容审核机制wx.cloud.uploadFile({cloudPath: 'my-image' + tempFilePaths[0].match(/\.[^.]+?$/)[0],filePath: tempFilePaths[0],success: res => {wx.showToast({icon: 'none',title: '正在加载图片...',})console.log('上传成功：', res)wx.cloud.callFunction({name: 'checkImg',data: {contentType: 'image/jpg',fileID: res.fileID}}).then(res => {console.log("检测结果", res.result);if (res.result.errCode == 0) {this.setData({bgPic: tempFilePaths[0],picChoosed: true});} else {this.setData({bgPic: '../../image/ban.jpg',picChoosed: true});wx.showToast({icon: 'none',title: '图片含有敏感信息，换张图吧~',})}})},fail: e => {console.error('上传失败：', e)}})
云函数checkImg：（云函数配置看这里）
// 云函数入口函数 图片下载和鉴别exports.main = async(event, context) => {const fileID = event.fileIDconst res = await cloud.downloadFile({fileID: fileID,})const buffer = res.fileContenttry {var result = await cloud.openapi.security.imgSecCheck({media: {contentType: event.contentType,value: buffer}});return result} catch (err) {return err}}
方法二：小程序端图片转换base64，直接把buffer传到云函数处理（就是有点卡）
小程序端js：
// 审核开始console.log("内容审核机制启动...");console.log(res);// 转base64let base64 = wx.getFileSystemManager().readFileSync(res.tempFilePath, 'base64')// console.log(base64)// console.log("access_token =", this.data.accessToken);console.log("图片地址 = ", tempFilePaths[0])//调用云函数wx.cloud.callFunction({// 云函数名称name: 'checkImg',// 传给云函数的参数data: {contentType: 'image/jpg',value: base64},}).then(res => {// this.setData({// picPassed: res.result.pic_passed// });console.log("errCode: ", res.result.errCode);console.log("errMsg: ", res.result.errMsg);// 图片不合法if (res.result.errCode == 87014) {this.setData({bgPic: '../../image/ban.jpg'});} else {this.setData({bgPic: tempFilePaths[0]});}console.log('Img validation check: ', this.data.picPassed);console.log('Original Img: ', tempFilePaths[0]);}).catch(console.error);// 审核结束
云函数：
// 云函数入口文件const cloud = require('wx-server-sdk')cloud.init({env: cloud.DYNAMIC_CURRENT_ENV})exports.main = async(event, context) => {try {console.log('check img...');console.log('contentType :', event.contentType);console.log('value :', Buffer.from(event.value));var result = await cloud.openapi.security.imgSecCheck({media: {contentType: event.contentType,value: Buffer.from(event.value)}});return result} catch (err) {return err}}
