uniapp请求封装

Vue.prototype.sendRequest = function(url,param,method,callBack){
    var _self = this, 
        // method = param.method,
        header = {},
        data = param|| {}, 
        token =uni.getStorageSync("access_token");
    //拼接完整请求地址
    var requestUrl = this.websiteUrl + url;

    var timestamp = Date.parse(new Date());//时间戳
    data["timestamp"] = timestamp;
    // #ifdef MP-WEIXIN
    data["device"] = "wxapp";
    data["ver"] = "1.1.30";
    // #endif
    // #ifdef APP-PLUS || H5
    data["device"] = "iosapp";
    data["ver"] = "1.0.0";
    data["access_token"]=token;
    // #endif
    //请求方式:GET或POST(POST需配置header: {'content-type' : "application/x-www-form-urlencoded"},)
    if(method){
        method = method.toUpperCase();//小写改为大写
        if(method=="POST"){
            header = {'content-type' : "application/x-www-form-urlencoded"};
        }else{
            header = {'content-type' : "application/json"};
        }
    }else{
        method = "GET";
        header = {'content-type' : "application/json"};
    }
    //网络请求
    uni.request({
        url: requestUrl,
        data: data,
        method: method, 
        header: header,
        success: res => {
            if(res.data.code==200){
                callBack(res.data.data); 
            }else{
                _self.login(false);
            }
        },
        fail: (e) => {
            //console.log("网络请求fail:" + JSON.stringify(e));
            uni.showModal({
                content:"" + e.errMsg
            });
            // typeof param.fail == "function" && param.fail(e.data);
        },
        complete: () => {
            //console.log("网络请求complete");
            // uni.hideLoading();
            // typeof param.complete == "function" && param.complete();
            //return;
        }
    });