背景

旧的版本，在wordpress上二次开发，不够灵活，且依赖服务器环境的定时任务更新识别token。

新的版本，解决问题：UI问题，体验问题，配置问题，以及微信要求图片检测等问题，问题真多。

解决方案

后台使用Parse server 前端首页，搬了百度识别的首页

CORE

后端

• 微信自动登录
• 获取百度识别token
• 微信图片检测

  前端

• 缓存设计
• 体验与广告

Functions

微信自动登录

Parse.Cloud.define('signUpOrlogInWithMiniProJsCode', async (request) => {
try {
let appid;
if (request.log && request.log.hasOwnProperty('appId')) {
appid = request.log['appId'];
}

    if (isEmpty(appid)) {
      return { 'success': false, 'message': '缺少参数appid' };
    }
    let wxAppid = apps[appid].appid;
    let wxSecret = apps[appid].secret;

    if (isEmpty(wxAppid) || isEmpty(wxSecret)) {
      return { 'success': false, 'message': '未配置小程序appid或secret' };
    }
    let jsCode = request.params['js_code'];
    if (isEmpty(jsCode)) {
      return { 'success': false, 'message': '请先获取微信登录js_code' };
    }

    const wxAppId = request.params['wxAppId'];
    if (wxAppid) {
      wxAppid = wxAppId;
      wxSecret = wxApps[wxAppId];
      console.log(`wxAppId ${wxAppId} wxSecret ${wxSecret}`);
    }

    // 去微信服务器请求获取openid
    let grant_type = "authorization_code";// 授权（必填）默认值
    //请求获取openid
    let url = "https://api.weixin.qq.com/sns/jscode2session?grant_type=" + grant_type + "&appid=" + wxAppid + "&secret=" + wxSecret + "&js_code=" + jsCode;

    console.log('开始获取微信openid');
    const results = await getRequest(url);
    console.log('已获取微信 %j', results);
    if (results.hasOwnProperty('errmsg')) {
      return { 'success': false, 'message': results.errmsg };
    }
    let openid;
    let sessionKey;
    if (results.hasOwnProperty('openid')) {
      openid = results.openid;//得到openid
    }

    if (isEmpty(openid)) {
      return { 'success': false, 'message': '获取微信登录信息异常，请重试' };
    }
    const query = new Parse.Query(Parse.User);
    query.equalTo('username', openid);
    
    let user = await query.first({ useMasterKey: true });
    console.log('已查找用户 %j', user);
    if (isEmpty(user)) {
        //注册 简化 注册
        let us = new Parse.User();
        us.set('username', openid);
        us.set('password', openid);
        us.set('openid', openid);
        us.set("email", openid + "@weixin.com");
        let logU = await us.signUp();
        if (isEmpty(logU)) {
            return { 'success': false, 'message': '注册异常，请重试' };
        }
        else {
          const logUser = await Parse.User.logIn(openid, openid);
          return { 'success': true, 'message': '注册成功', 'token': logUser.getSessionToken() };
        }
    }
    else {
        //登录
        const logUser = await Parse.User.logIn(openid, openid);
        return { 'success': true, 'message': '登录成功', 'token': logUser.getSessionToken() }; 
    }
}
catch (error) {
console.log("异常signUpOrlogInWithMiniProJsCode");
console.log(error);
}
});

百度识别token

Parse.Cloud.define('baiduAccessToken', async (request, response) => {
  try {
    const cacheAccessToken = baiduAccessToken.access_token;
    const cacheAccessTokenCreate = baiduAccessToken.access_token_create_date;
    const cacheExpiresIn = baiduAccessToken.expires_in;
    if (isEmpty(cacheAccessToken)) {
      // 从服务器拉取token
    }
    else {
      // accessToken是否已过期
      const currentDate = getDateNowSecond();
      const dur = currentDate - cacheAccessTokenCreate;
      console.log('缓存accessTokens结果 失效时间约:' + dur + ' token:' + cacheAccessToken);
      if (cacheExpiresIn > dur) {
        return { 'success': true, 'message': '', 'access_token': cacheAccessToken, 'expires_in': cacheExpiresIn, 'created': cacheAccessTokenCreate };
      }

    }

    const host = 'aip.baidubce.com';
    const ak = 'xx';
    const sk = 'xx';
    const path = '/oauth/2.0/token?client_id=' + ak + '&client_secret=' + sk + '&grant_type=client_credentials';
    const params = {};
    const date = getDateNowSecond();
    const results = await postRequest(host, path, params);
    console.log('获取百度识别token %j', results);
    if (results.hasOwnProperty('error')) {
      return { 'success': false, 'message': '获取识别TOKEN异常，请重试' };
    }
    if (results.hasOwnProperty('access_token')) {
      baiduAccessToken = {
        access_token: results.access_token,
        expires_in: results.expires_in,
        access_token_create_date: date
      }
      return { 'success': true, 'message': '', 'access_token': results.access_token, 'expires_in': results.expires_in, 'created': date };
    }

    return { 'success': false, 'message': '网络异常，请重试' };
  }
  catch (error) {
    console.log("异常baiduAccessToken");
    console.log(error);
  }
});