微信网页授权 、获取用户昵称 头像等信息

一、重定向

function getCode () {  
  var param = {
    app: app,
    origin_url: window.location.href
  }
  var queryString = getSignature(param) + '&' + getQueryString(param)  // 未授权，跳转到授权页面
  if (!localStorage.getItem('wxcode')) {
    window.location.href = 'http://wx.linktodeal.com/sns/authorization?'+ queryString
  }
}

二、获取用户信息

function getUserInfo () {
  $.ajax({
    type: "GET",
    url: "http://wx.linktodeal.com/sns/info?app=PDCUGQUBOOUOP5XTP&code="+ localStorage.getItem('wxcode'),
    dataType: "json",
    success: function(data){
      if (data.code == 0) {
        var saveData = JSON.stringify(data.data)
        getDomById('name').innerHTML = data.data.nickname
        localStorage.setItem('userinfo', saveData)
        if (localStorage.getItem('source')) {
          getCreateId()
        } else {
          if (!localStorage.getItem('hasRefresh')) {
            checkCreate()
          }
        }
      } else {
        alert('服务器开了个小差，请刷新重试')
      }
    }
  });
}

三、引入必要的js

<script src="http://res.wx.qq.com/open/js/jweixin-1.2.0.js"></script>

<script src="//unpkg.com/crypto-js/crypto-js.js"></script>

<script src="js/signature.js"></script>

分装的签名获取(signature.js)：

'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

var appid = 'PDCUGQUBOOUOP5XTP';
var secret = 'ox2RVFBD8jNY79pUmG7gwrN2pCD4p10P';
function getSignature(data, token) {
  var query = {
    timestamp: Math.ceil(new Date().getTime() / 1000),
    noncestr: randomChar(16),
    appid: appid,
    access_token: token || ''
  };

  var _data = deepCopy(data);
  _data.timestamp = query.timestamp;
  _data.noncestr = query.noncestr;
  _data.appid = query.appid;
  _data.access_token = query.access_token;
  forEachValue(_data, function (item, key) {
    var type = typeof item === 'undefined' ? 'undefined' : _typeof(item);
    if (type === 'object') {
      _data[key] = encodeStr(JSON.stringify(item));
    } else if (type === 'function') {} else if (type === 'string') {
      _data[key] = encodeStr(item);
    }
  });
  var str = getQueryString(_data).toUpperCase();
  var strMd5 = CryptoJS.MD5(str).toString() + secret;
  query.signature = CryptoJS.SHA256(strMd5).toString();
  return getQueryString(query);
}
function randomChar(l) {
  var x = '0123456789qwertyuioplkjhgfdsazxcvbnmABCDEFGHIJKLMNOPQRSTUVWXYZ';
  var tmp = '';
  for (var i = 0; i < l; i++) {
    tmp += x.charAt(Math.ceil(Math.random() * 100000000) % x.length);
  }
  return tmp;
}
function encodeStr(str) {
  return encodeURIComponent(str).replace(/!/g, '%21').replace(/'/g, '%27').replace(/(/g, '%28').replace(/)/g, '%29').replace(/*/g, '%2A');
}
function getQueryString(obj) {
  var arr = [];
  var _tmpArray = [];
  for (var index in obj) {
    _tmpArray.push(index);
  }
  _tmpArray.sort();

  _tmpArray.forEach(function (key) {
    if (_typeof(obj[key]) === 'object') {
      obj[key].forEach(function (item) {
        arr.push(key + '[]' + '=' + item);
      });
    } else {
      arr.push(key + '=' + obj[key]);
    }
  });
  return arr.join('&');
}
function forEachValue(obj, fn) {
  Object.keys(obj).forEach(function (key) {
    return fn(obj[key], key);
  });
}
function deepCopy(obj) {
  var cache = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
  if (obj === null || (typeof obj === 'undefined' ? 'undefined' : _typeof(obj)) !== 'object') {
    return obj;
  }
  var hit = find(cache, function (c) {
    return c.original === obj;
  });
  if (hit) {
    return hit.copy;
  }

  var copy = Array.isArray(obj) ? [] : {};
  cache.push({
    original: obj,
    copy: copy
  });

  Object.keys(obj).forEach(function (key) {
    copy[key] = deepCopy(obj[key], cache);
  });

  return copy;
}
function GetQueryString(name) {
  var reg = new RegExp('(^|&)' + name + '=([^&]*)(&|$)');
  var r = window.location.search.substr(1).match(reg);
  if (r != null) {
    return unescape(r[2]);
  }
  return null;
}