问下为啥我用桌面版微信的打开网页post请求fail？uniapp打包出的文件

Vue.prototype._post_form = function(url, data, success, fail, complete) {  
    let App = this;  
    uni.request({  
        url: App.api_root + url,  
        header: {  
            'content-type': 'application/x-www-form-urlencoded',  
        },  
        method: 'POST',  
        data: data,  
        success: function(res) {  
            console.log(res)  
        },  
        fail: function(res) {  
            console.log(res);  
            console.log(url);  
            App.showError('网络请求出错!', function() {  
                fail && fail(res);  
            });  
        },  
        complete: function(res) {  

        }  
    });  
}Copy