不知道哪里出错了，debug出的值也都有

var createNoce = function() {
    return Math.random().toString(36).substr(2,15)
}
var createTimestamp = function(){
    return parseInt(new Date().getTime() / 1000,10) + ''
}
function _sign(noncestr,ticket,timestamp,url){
    var params = [
        'noncestr=' + noncestr,
        'jsapi_ticket=' + ticket,
        'timestamp=' +timestamp,
        'url'+url
    ]
    var str = params.sort().join("&")
    var shasum = crypto.createHash('sha1')
    shasum.update(str)
    return shasum.digest('hex')
}
// noncestr=Wm3WZYTPz0wzccnW
// jsapi_ticket=sM4AOVdWfPE4DxkXGEs8VMCPGGVi4C3VM0P37wVUCFvkVAy_90u5h9nbSlYy3-Sl-HhTdfl2fzFy1AOcHKP7qg
// timestamp=1414587457
// url=http://mp.weixin.qq.com?params=value
function sign(ticket,url) {
    var noncestr = createNoce();
    var timestamp = createTimestamp();
    console.log(noncestr)
    var signature = _sign(noncestr,ticket,timestamp,url)
    console.log(ticket)
    console.log(url)
    console.log(signature)
    return {
        noncestr:noncestr,
        timestamp:timestamp,
        signature:signature
    }
}
app.use(function *(next){
    if(this.url.indexOf('/movie')> -1) {
        var wechatApi = new Wechat(config.wechat)
        var data = yield wechatApi.fetchAccessToken()
        var access_token = data.access_token
        var ticketData = yield wechatApi.fetchTicket(access_token)
        var ticket = ticketData.ticket
        var url = this.href
        var params = sign(ticket,url)
        params.appId = config.wechat.appId
        this.body = ejs.render(tpl,params)

        return next
    }
    yield next
})

输出的信息是

h2h6vy9ad4r0ms4

kgt8ON7yVITDhtdwci0qecBfhXJw7pqsXVhmJXCLhG9iaOp93d1z6m-zmGDVuBoR8Ukhm1RT4hYuXOAr6t8GLQ

http://wx.v-life.cn/movie/index

1a78cbdf34644916f8bed2f9be37c1f8efb050ad