class Http {

    constructor() {
        this.xhr = new XMLHttpRequest();
    }

    //获取地震了参数
    get(params) {
        var par = ""
        for (const key in params.data) {
            par += `&${key}=${params.data[key]}`
        }
        par = par.replace("&", "?")
        this.xhr.open("GET", `${params.url}${par}`)
        this.xhr.send()
        this.ReadyState(params)
    }

    //数据请求方式
    post(params) {
        this.xhr.open("POST", `${params.url}`)

        this.xhr.setRequestHeader('Content-Type', 'application/json');
        this.xhr.send(JSON.stringify(params.data))
        this.ReadyState(params)
    }

    ReadyState(params) {
        this.xhr.onreadystatechange = () => {
            if (this.xhr.readyState == 4) {
                if (this, xhr.readyState == 200) {
                    var data = JSON.parse(this.xhr.response);
                    promise.success(data)
                } else {
                    params.error(this, xhr)
                }
            }

        }
    }
}
var http = new Http();