纯js实现文件下载并重命名功能
来源: https://www.cnblogs.com/vipzhou/p/10700130.html
/**
* 获取 blob
* @param {String} url 目标文件地址
* @return {cb}
*/
function getBlob(url,cb) {
var xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.responseType = 'blob';
xhr.onload = function() {
if (xhr.status === 200) {
cb(xhr.response);
}
};
xhr.send();
}
/**
* 保存
* @param {Blob} blob
* @param {String} filename 想要保存的文件名称
*/
function saveAs(blob, filename) {
if (window.navigator.msSaveOrOpenBlob) {
navigator.msSaveBlob(blob, filename);
} else {
var link = document.createElement('a');
var body = document.querySelector('body');
link.href = window.URL.createObjectURL(blob);
link.download = filename;
// fix Firefox
link.style.display = 'none';
body.appendChild(link);
link.click();
body.removeChild(link);
window.URL.revokeObjectURL(link.href);
};
}
/**
* 下载
* @param {String} url 目标文件地址
* @param {String} filename 想要保存的文件名称
*/
function download(url, filename) {
getBlob(url, function(blob) {
saveAs(blob, filename);
});
};
download('https://www.baidu.com/img/baidu_resultlogo@2.png', 'ab.png')