vue PDF下载与预览（文件流格式和base64格式）
getPDFDataOfYL({ fileId: item.DOC }).then(res => {
this.loading = false;
if (res.data.data) {
// 预览
if (flag !== 'DOWN') {
this.basePdf = res?.data?.data;
const basedata = res.data.data;
this.pdfContent = 'data:application/pdf;base64,' + basedata;
this.src = pdf.createLoadingTask({ url: this.pdfContent, CMapReaderFactory });
this.src.promise.then(pdf => {
this.numPages = pdf.numPages;
});
} else { // 下载
this.dataURLtoBlob(res?.data?.data);
var reader = new FileReader();
reader.readAsDataURL(this.transData);
reader.onload = function (e) {
// 兼容IE
if (window.navigator.msSaveOrOpenBlob) {
var bstr = atob(e.target.result.split(',')[1]);
var n = bstr.length;
var u8arr = new Uint8Array(n);
while (n--) {
u8arr[n] = bstr.charCodeAt(n);
}
var blob = new Blob([u8arr]);
window.navigator.msSaveOrOpenBlob(blob, item.DOCNAME);
} else {
// 转换完成，创建一个a标签用于下载
const a = document.createElement('a');
a.download = item.DOCNAME; // 这里写你的文件名
a.href = e.target.result;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
}
};
}
}
});