forked from mystiq/hydrogen-web
99 lines
4.6 KiB
HTML
99 lines
4.6 KiB
HTML
|
<!DOCTYPE html>
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<button id="download">Download</button>
|
||
|
|
<iframe id="iframe" sandbox="allow-scripts allow-downloads allow-downloads-without-user-activation"></iframe>
|
||
|
|
<script type="text/javascript">
|
||
|
|
const iframeHtml = `
|
||
|
|
<!DOCTYPE html>
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
<a id="link" href="#">Link to progamatically click</a>
|
||
|
|
<script type="text/javascript">
|
||
|
|
var link = document.getElementById("link");
|
||
|
|
|
||
|
|
function downloadBlob(blob, filename) {
|
||
|
|
var url = URL.createObjectURL(blob);
|
||
|
|
link.href = url;
|
||
|
|
link.download = filename;
|
||
|
|
link.innerText = url;
|
||
|
|
link.click();
|
||
|
|
URL.revokeObjectURL(url);
|
||
|
|
}
|
||
|
|
|
||
|
|
function toBase64(buffer) {
|
||
|
|
let binaryStr = "";
|
||
|
|
const bytes = new Uint8Array(buffer);
|
||
|
|
for (let i = 0; i < bytes.byteLength; i++) {
|
||
|
|
binaryStr += String.fromCharCode(bytes[i]);
|
||
|
|
}
|
||
|
|
return window.btoa(binaryStr);
|
||
|
|
}
|
||
|
|
|
||
|
|
function downloadBuffer(buffer, mimeType, filename) {
|
||
|
|
var url = "data:" + mimeType + ";base64," + toBase64(buffer);
|
||
|
|
link.href = url;
|
||
|
|
link.download = filename;
|
||
|
|
link.innerText = url;
|
||
|
|
link.click();
|
||
|
|
}
|
||
|
|
|
||
|
|
window.addEventListener("message", async function(event) {
|
||
|
|
// if (event.origin === window.location.origin) {
|
||
|
|
if (event.data.type === "downloadBuffer") {
|
||
|
|
await downloadBuffer(event.data.buffer, event.data.mimeType, event.data.filename);
|
||
|
|
} else if (event.data.type === "downloadBlob") {
|
||
|
|
await downloadBlob(event.data.blob, event.data.filename);
|
||
|
|
}
|
||
|
|
// }
|
||
|
|
});
|
||
|
|
</${"script"}>
|
||
|
|
</body>
|
||
|
|
</html>`;
|
||
|
|
const isIOS = /iPad|iPhone|iPod/.test(navigator.platform) || (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1) && !window.MSStream;
|
||
|
|
const iframe = document.getElementById("iframe");
|
||
|
|
const button = document.getElementById("download");
|
||
|
|
iframe.setAttribute("srcdoc", iframeHtml);
|
||
|
|
const blob = new Blob(["a message from the iframe"], {type: "text/plain"});
|
||
|
|
window.addEventListener("message", async event => {
|
||
|
|
//if (event.origin === window.location.origin) {
|
||
|
|
//}
|
||
|
|
});
|
||
|
|
button.addEventListener("click", async evt => {
|
||
|
|
if (isIOS) {
|
||
|
|
const reader = new FileReader();
|
||
|
|
const promise = new Promise((resolve, reject) => {
|
||
|
|
reader.addEventListener("error", e => reject(e.error));
|
||
|
|
reader.addEventListener("load", e => resolve(e.target.result));
|
||
|
|
});
|
||
|
|
reader.readAsArrayBuffer(blob);
|
||
|
|
let buffer = await promise;
|
||
|
|
|
||
|
|
iframe.contentWindow.postMessage({type: "downloadBuffer", mimeType: "text/plain", buffer, filename: "hello world.txt"}, "*");
|
||
|
|
} else {
|
||
|
|
iframe.contentWindow.postMessage({type: "downloadBlob", blob, filename: "hello world.txt"}, "*");
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
if (window.SharedArrayBuffer) {
|
||
|
|
const srcView = new Uint8Array(buffer);
|
||
|
|
const sharedBuffer = new SharedArrayBuffer(buffer.byteLength);
|
||
|
|
const dstView = new Uint8Array(sharedBuffer);
|
||
|
|
for (var i = srcView.length - 1; i >= 0; i--) {
|
||
|
|
dstView[i] = srcView[i];
|
||
|
|
}
|
||
|
|
buffer = sharedBuffer;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
//iframe.contentWindow.postMessage({type: "downloadBlob", blob, filename: "hello world.txt"}, "*");
|
||
|
|
});
|
||
|
|
|
||
|
|
</script>
|
||
|
|
</body>
|
||
|
|
</html>
|