云函数

const cloud = require('wx-server-sdk')

cloud.init()

exports.main = async (event, context) => {

  try {

    const result = await cloud.openapi.security.imgSecCheck({

      media: { 

        header: {'Content-Type': 'application/octet-stream'},

        contentType: 'image/jpg',

        content: Buffer.from(event.value)

      }

    })

    return result

  } catch (err) {

    return {

      code: 10,

      msg: '检测失败',

      error: err

    }

  }

}

前端

    wx.getFileSystemManager().readFile({

      filePath: tempFilePath,

      success: async (res) => {

        const imgBase64 = res.data

        try {

          const checkRes = await cloudInstance.callFunction({

            name: 'imgSecCheck', 

            data: {

              value: imgBase64

            }

          })

        } catch (err) {

        }

      },

    })

一直报错 errCode: 47001, errMsg: "openapi.security.imgSecCheck:fail data format error rid: " 也参考了别人的评论里的代码，为什么不行？