import { openWindow } from '..';
import { dataURLtoBlob, urlToBase64 } from './base64Conver';
/**
* Download online pictures
* @param url
* @param filename
* @param mime
* @param bom
*/
export function downloadByOnlineUrl(url: string, filename: string, mime?: string, bom?: BlobPart) {
urlToBase64(url).then((base64) => {
downloadByBase64(base64, filename, mime, bom);
});
}
/**
* Download pictures based on base64
* @param buf
* @param filename
* @param mime
* @param bom
*/
export function downloadByBase64(buf: string, filename: string, mime?: string, bom?: BlobPart) {
const base64Buf = dataURLtoBlob(buf);
downloadByData(base64Buf, filename, mime, bom);
}
/**
* Download according to the background interface file stream
* @param {*} data
* @param {*} filename
* @param {*} mime
* @param {*} bom
*/
export function downloadByData(data: BlobPart, filename: string, mime?: string, bom?: BlobPart) {
const blobData = typeof bom !== 'undefined' ? [bom, data] : [data];
const blob = new Blob(blobData, { type: mime || 'application/octet-stream' });
if (typeof window.navigator.msSaveBlob !== 'undefined') {
window.navigator.msSaveBlob(blob, filename);
} else {
const blobURL = window.URL.createObjectURL(blob);
const tempLink = document.createElement('a');
tempLink.style.display = 'none';
tempLink.href = blobURL;
tempLink.setAttribute('download', filename);
if (typeof tempLink.download === 'undefined') {
tempLink.setAttribute('target', '_blank');
}
document.body.appendChild(tempLink);
tempLink.click();
document.body.removeChild(tempLink);
window.URL.revokeObjectURL(blobURL);
}
}
/**
* Download file according to file address
* @param {*} sUrl
*/
export function downloadByUrl({ url, target = '_blank', fileName }: { url: string; target?: TargetContext; fileName?: string }): boolean {
const isChrome = window.navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
const isSafari = window.navigator.userAgent.toLowerCase().indexOf('safari') > -1;
if (/(iP)/g.test(window.navigator.userAgent)) {
console.error('Your browser does not support download!');
return false;
}
if (isChrome || isSafari) {
const link = document.createElement('a');
link.href = url;
link.target = target;
if (link.download !== undefined) {
link.download = fileName || url.substring(url.lastIndexOf('/') + 1, url.length);
}
if (document.createEvent) {
const e = document.createEvent('MouseEvents');
e.initEvent('click', true, true);
link.dispatchEvent(e);
return true;
}
}
if (url.indexOf('?') === -1) {
url += '?download';
}
openWindow(url, { target });
return true;
}