38 lines
1.5 KiB
JavaScript
38 lines
1.5 KiB
JavaScript
|
/*
|
||
|
|
Copyright 2020 The Matrix.org Foundation C.I.C.
|
||
|
|
|
||
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
you may not use this file except in compliance with the License.
|
||
|
|
You may obtain a copy of the License at
|
||
|
|
|
||
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
|
||
|
|
Unless required by applicable law or agreed to in writing, software
|
||
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
See the License for the specific language governing permissions and
|
||
|
|
limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
export async function downloadInIframe(container, iframeSrc, blob, filename) {
|
||
|
|
let iframe = container.querySelector("iframe.downloadSandbox");
|
||
|
|
if (!iframe) {
|
||
|
|
iframe = document.createElement("iframe");
|
||
|
|
iframe.setAttribute("sandbox", "allow-scripts allow-downloads allow-downloads-without-user-activation");
|
||
|
|
iframe.setAttribute("src", iframeSrc);
|
||
|
|
iframe.className = "downloadSandbox";
|
||
|
|
container.appendChild(iframe);
|
||
|
|
let detach;
|
||
|
|
await new Promise((resolve, reject) => {
|
||
|
|
detach = () => {
|
||
|
|
iframe.removeEventListener("load", resolve);
|
||
|
|
iframe.removeEventListener("error", reject);
|
||
|
|
}
|
||
|
|
iframe.addEventListener("load", resolve);
|
||
|
|
iframe.addEventListener("error", reject);
|
||
|
|
});
|
||
|
|
detach();
|
||
|
|
}
|
||
|
|
iframe.contentWindow.postMessage({type: "download", blob: blob, filename: filename}, "*");
|
||
|
|
}
|