微信内二次分享网页

import fetchData from '@/common/api';
import { SHA1 } from 'crypto-js';
const appId = '';
const secret = '';

// 后端
async function getWxSign(_, { pageUrl }) {
  try {
// 获取access_token
    const accessRes = await fetch(`https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=${appId}&secret=${secret}`)
    const access = await accessRes.json();
    console.log('access', access);
// 获取jsapi_ticket
    const ticketRes = await fetch(`https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=${access.access_token}&type=jsapi`);
    const ticket = await ticketRes.json();
    console.log('ticket', ticket);
// 时间戳（秒）
    const timestamp = Math.ceil(Date.now() / 1000);
// 32 位随机字串
    const nonceStr = `${Date.now()}${Date.now()}${Math.floor(Math.random() * 10000)}`.slice(0, 32);
    const obj = { appId, timestamp, noncestr: nonceStr, url: pageUrl }
// 根据规则生成字符串
    const signature = ['noncestr', 'jsapi_ticket', 'timestamp', 'url'].sort().map(e => {
      return `${e}=${obj[e]}`
    }).join('&')
    return {
      data: {
        appId, timestamp, nonceStr, link: pageUrl, signature: SHA1(signature) // sha1方式加密根据规则生成的字符串
      }
    }
  } catch (error) {
    return Promise.reject(error)
  }
}

// 前端
// 浏览器分享
export async function setMetaConent({ title, content, icon }) {
  try {
    const obj = {
      'og:title': title,
      'og:description': content,
      'og:image': icon,
    }
    const ele = [...document.head.querySelectorAll("[property^=og]")]
    ele.forEach(e => {
      const type = e.getAttribute('property');
      e.setAttribute('content', obj[type]);
    })
  } catch (error) {
    console.log(error);
  }
}
// 微信内二次分享
export async function getShareConfig(params) {
  const { title = '默认标题', content = '默认描述', icon = '默认logo' } = params;
  let idx = 0;
  let steps = [1000, 2000, 3000, 4000, 8000, 16000, 32000, 64000];
  let data = {};
  let url = ''; // 分享页面地址链接 

  async function wxConfig() {
    url = window.location.href.split('#')[0];
    const res = await fetchData('getWxSign', { pageUrl: url }); // 获取签名 
    data = res.data;
    wx.config({
      debug: false,// 关闭调试模式
      appId: data.appId, // 必填，公众号的唯一标识
      timestamp: data.timestamp, // 必填，生成签名的时间戳
      nonceStr: data.noncestr, // 必填，生成签名的随机串
      signature: data.signature, // 必填，签名
      jsApiList: [
        "updateTimelineShareData",
        "updateAppMessageShareData",
        'onMenuShareTimeline',
        'onMenuShareAppMessage'
      ]
    });
  }
  function wxConfigReady() {
    let shareParams = {
      title,
      desc: content,
      link: data.link || url,
      imgUrl: icon,
      success: () => console.log('分享准备完成')
    }
    console.log('wx=>ready shareParams:', shareParams)
    wx.updateAppMessageShareData(shareParams)
    wx.updateTimelineShareData(shareParams)
    wx.onMenuShareAppMessage(shareParams)
    wx.onMenuShareTimeline(shareParams)
  }
  function wxConfigError() {
    console.log('wx=>error 第', idx + 1, '次');
    setTimeout(wxConfig, idx < steps.length ? steps[idx++] : steps[steps.length - 1])
  }
  wx.error(wxConfigError);
  wx.ready(wxConfigReady);
  wxConfig();
}