微信 JS-SDK Demo “分享信息设置” API 及数字签名生成方法（NodeJS版本）

https.get('https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=你的appid写在这里&secret=你的secret写在这里', function(_res) {
               // 这个异步回调里可以获取access_token
          })

https.get('https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=上一步中获取的access_token&type=jsapi', function(_res){
         // 这个异步回调里可以获取ticket

// noncestr
     var createNonceStr = function() {
          return Math.random().toString(36).substr(2, 15);
     };
      // timestamp
     var createTimeStamp = function () {
          return parseInt(new Date().getTime() / 1000) + '';
     };

// 计算签名方法
     var calcSignature = function (ticket, noncestr, ts, url) {
          var str = 'jsapi_ticket=' + ticket + '&noncestr=' + noncestr + '&timestamp='+ ts +'&url=' + url;
          shaObj = new jsSHA(str, 'TEXT');
          return shaObj.getHash('SHA-1', 'HEX');
     }
var signature = calcSignature(ticket, noncestr, timestamp, url);

wx.config({
                  debug: true,
                  appId: appid,
                  timestamp: timestamp,
                  nonceStr: nonceStr,
                  signature: signature,
                  jsApiList: [
                      'checkJsApi',
                      'onMenuShareTimeline',
                      'onMenuShareAppMessage',
                      'onMenuShareQQ',
                      'onMenuShareWeibo',
                      'hideMenuItems',
                      'chooseImage'
                  ]
              });

wx.ready(function(){
                   var sdata = {
                        title: '那年|时光遗忘了，文字却清晰地复刻着',
                        desc: '那年|时光遗忘了，文字却清晰地复刻着',
                        link: location.href.split('#')[0],
                        imgUrl: 'https://www.baidu.com/img/PCtm_d9c8750bed0b3c7d089fa7d55720d6cf.png',
                        success: function () {
                            alert('用户确认分享后执行的回调函数');
                        },
                        cancel: function () {
                            alert('用户取消分享后执行的回调函数');
                        }
                    };
                   wx.onMenuShareTimeline(sdata);
                   wx.onMenuShareAppMessage(sdata);
              });

var cachedSignatures =  {
               'https://tiepili.com/web/index.html': {
                    appid: ’微信认证帐号的的appid'
                    ,secret: '微信认证帐号的secret'
                    ,timestamp: '1421135250'
                    ,noncestr: 'ihj9ezfxf26jq0k'
               }
          }