js文件下载blob

使用axios文件下载

if (tableDataSource.selectedRowKeys.length > 0) {
        //本次请求你携带token
	axios.defaults.headers[
	  'authorization'
	] = `Bearer ${store.state.login.accessToken}`
  //你携带的token
  axios.defaults.headers['tenantId'] =
	  store.state.login.tempTenant.id || ''
  axios
	  .post(
		  window.globalConfig.baseUrl +
			  '/asset-manage-api/api/manage/asset/aa/bb',  //你请求的地址
		  tableDataSource.selectedRowKeys,  //你携带的数组
		  {
			  responseType: 'blob', // blob流进行下载 
		  }
	  )
	  .then(res => {
		  let blob = new Blob([res.data], {
			  type: 'applicationnd.ms-excel',
		  })
		   if (!!window.ActiveXObject || 'ActiveXObject' in window) {
			  window.navigator.msSaveOrOpenBlob(blob, 'fileName')
			} else {
			  const link = document.createElement('a')
			  link.style.display = 'none'
			  link.href = URL.createObjectURL(blob)
			  link.setAttribute('download', 'fileName')
			  document.body.appendChild(link)
			  link.click()
			  document.body.removeChild(link)
		  }
	  })
} else {
  alert("请选择")
}

使用原生js下载文件

// 判断是否有这个属性
const createObjectURL = function (object) {
	return window.URL
		? window.URL.createObjectURL(object)
		: window.webkitURL.createObjectURL(object)
}

// 使用promise判断是否是文件流
const checkBlob = function (blob) {
	return new Promise<void>((resolve, reject) => {
		const fileReader = new FileReader()
		fileReader.onload = function (res: any) {
			const data =
				res.target.result.substr(0, 1) == '{'
					? JSON.parse(res.target.result)
					: { success: true }
			if (!data.success) {
				reject(data.msg)
			} else {
				resolve()
			}
		}
		fileReader.readAsText(blob)
	})
}

// 文件下载的主体方法
// callback是文件下载成功后的回调函数
// 
app.config.globalProperties.blobFileDownLoad = function (
	params,
	callback
) {
	if (!params.method) params.method = 'get'
	const xhr = new XMLHttpRequest()
	xhr.open(params.method, params.url, true)
	xhr.setRequestHeader(
		'Authorization',
		'Bearer ' + store.state.login.accessToken
	)
	xhr.responseType = 'blob'
	xhr.onload = function (e) {
		if (this.status == 200) {
			const blob = this.response
			checkBlob(blob)
				.then(() => {
					const filename = params.name + '.xls'
					const _window: any = window
					if (_window.navigator.msSaveOrOpenBlob) {
						navigator.msSaveBlob(blob, filename)
					} else {
						const a = document.createElement('a')
						const url = createObjectURL(blob)
						a.href = url
						a.download = filename
						document.body.appendChild(a)
						a.click()
						window.URL.revokeObjectURL(url)
					}
				})
				.catch(err => {
					window.$message.error(err)
				})
			callback()
		}
	}
	xhr.setRequestHeader('Content-type', 'application/json')
	xhr.send(params.data)
}

使用pots的方式进行下载

proxy.blobFileDownLoad(
	{
		url:
			window.globalConfig.baseUrl +
			'/asset-manage-api/api/manage/asset/aa/bb',
		method: 'post',
		// 需要转化一下哈
		data: JSON.stringify(tableDataSource.selectedRowKeys),
	},
	() => {
		// 成功后的回调
		console.log(1)
	}
)

使用get的方式进行下载哈

function downLoad(type) {
	proxy.blobFileDownLoad(
		{
			url:
				window.globalConfig.baseUrl +
				'/asset-manage-api/api/manage/asset/cc/qq?type=' +
				type,
			name:'文件名'
		},
		() => {
			console.log(1)
		}
	)
}