# proto生成：
npm install protobufjs -g
pbjs -t static-module -w commonjs -o wfcmessage.js wfcmessage.proto

相关文章 https://github.com/fengxianqi/front_end-demos

proto 生成相关

npm install -g pbjs

## 1.环境安装
npm install protobufjs -g   注意：npm无法安装，使用cnpm

## 2.把wfcmessage.proto转成 wfcmessage.js
pbjs -t static-module -w commonjs -o wfcmessage.js wfcmessage.proto

## 3.把所有proto生成一个js的文件
pbjs -t static-module -w commonjs -o bundle.js *.proto

## 4.把proto生成json
pbjs -t json LkMessageHead.proto xx.proto > bundle.json

## 5.把所选proto生成js (目前使用的方式)
pbjs -t json-module -w commonjs -o bundle.js xx.proto xx.proto

注意：3和5是一样的

用法

import protoRoot from './bundle.js' 上面3或者5生成js文件
import protobuf from 'protobufjs'

// 加密
const PBMessageRequest = protoRoot.lookup('proto包名.proto.类名')
const data = {
   content: agentData,
   businessBody: 'dsdd',
   redPacketState: 18
}
const reqdata = PBMessageRequest.encode(data).finish()


// 解密
const PBMessage = protoRoot.lookup('proto包名.proto.类名')
const buf = protobuf.util.newBuffer(event.data)  //event.data需要解密的数据
const decodedResponse = PBMessage.decode(buf)
console.log(decodedResponse,'d')

import protoRoot from '@/protoBuffer/bundle.js'

export const pullMessageHead = (obj, protoName = 'im.proto.xxx') => {
  const PBMessageRequest = protoRoot.lookup(protoName)
  const encodeData = PBMessageRequest.encode(obj).finish()
  return encodeData
}

export const getMessageHead = (obj, protoName = 'im.proto.xxx') => {
  const PBMessageResponse = protoRoot.lookup(protoName)
  const buff = protobuf.util.newBuffer(obj)
  const decodedResponse = PBMessageResponse.decode(buff)
  return decodedResponse
}

export function arrayBufferToArray(arrayBuffer) {
  return Array.prototype.slice.call(new Uint8Array(arrayBuffer))
}

export function arrayToArrayBuffer(array) {
  return new Uint8Array(array).buffer
}

export function strToJson(str = '') {
  if (typeof str !== 'string') {
    return
  }
  let obj = JSON.parse(str)
  return Object.values(obj)
}

export function getBusinessBody(str) {
  if (!str) {
    return ''
  }
  let arr = strToJson(str)
  try {
    return arrayToArrayBuffer(arr)
  } catch (e) {
    throw e
  }
}