文件导出函数封装

// 导出
export function exporttable (httpUrl,token, formData, callback) { //callback 执行之后回调的函数
var xhr = new XMLHttpRequest()
if (xhr.withCredentials === undefined){ 
return false
};
xhr.open("post", httpUrl)
xhr.setRequestHeader("Authentication", token)
xhr.responseType = "blob"
xhr.onreadystatechange = function () {
if (xhr.readyState !== 4) {
callback && callback(false)
return
} //忽略未完成的调用
if (this.status === 200) {
var blob = this.response
var contentType = this.getResponseHeader('content-type')
var fileName = contentType.split(";")[1].split("=")[1]
fileName = decodeURI(fileName)
let aTag = document.createElement('a')
// 下载的文件名
aTag.download = fileName
aTag.href = URL.createObjectURL(blob)
aTag.click()
URL.revokeObjectURL(blob)
callback && callback(true) // 成功之后的执行的函数 true
} else {
callback && callback(false) // 失败之后执行函数 false
}
}
xhr.send(formData);
}

let formData = new FormData() // 导出传参
formData.append("partyaKey",this.model1)
formData.append("beginTime",this.value1)
formData.append("endTime",this.value2)
formData.append("pushBatchNum",this.model5)
formData.append("pushStatus",this.model2)
formData.append("origin",0)
formData.append("methodType",1)
let httpUrl = BASE_URL+'/common/partya/exportExcel'
utils.exporttable(httpUrl, utils.getlocal('token'),formData,e=>{
if(e == true){
this.loading2 = false
}  // 函数调用
})