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more prototypes

This commit is contained in:
Bruno Windels 2021-03-08 14:17:31 +01:00
parent bf9b69ba2a
commit cd4175c559
3 changed files with 187 additions and 0 deletions
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51
prototypes/webkit-blob-sandbox-fail/fail.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<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>
<button id="download">Download</button>
<a id="link" href="#">Link to progamatically click</a>
<script type="text/javascript">
var link = document.getElementById("link");
var button = document.getElementById("download");
async function download(blob, filename) {
const slice = blob.slice(0, 1);
const reader = new FileReader();
reader.readAsArrayBuffer(slice);
const buffer = await new Promise((resolve, reject) => {
reader.addEventListener("abort", () => reject(new Error("aborted")));
reader.addEventListener("error", e => reject(e.error));
reader.addEventListener("load", e => resolve(e.target.result));
});
document.body.appendChild(document.createTextNode("buffer: " + new Uint8Array(buffer)[0] + " (" + buffer.byteLength + ")"));
var url = URL.createObjectURL(blob);
link.href = url;
link.download = filename;
link.innerText = url;
link.click();
URL.revokeObjectURL(url);
}
button.addEventListener("click", async function(event) {
try {
await download(new Blob(["a message from the iframe"], {type: "text/plain"}), "hello world.txt");
} catch (err) {
document.body.appendChild(document.createTextNode(err.toString()));
}
});
</${"script"}>
</body>
</html>`;
document.getElementById("iframe").setAttribute("srcdoc", iframeHtml);
</script>
</body>
</html>

98
prototypes/webkit-blob-sandbox-fail/fix.html Normal file
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<!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>

38
prototypes/webkit-blob-sandbox-fail/index.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
<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>
<button id="download">Download</button>
<a id="link" href="#">Link to progamatically click</a>
<script type="text/javascript">
var link = document.getElementById("link");
var button = document.getElementById("download");
function download(str, filename) {
var url = "data:text/plain;base64," + btoa(str);
link.href = url;
link.download = filename;
link.innerText = url;
link.click();
URL.revokeObjectURL(url);
}
button.addEventListener("click", function(event) {
download("hello world", "hello world.txt");
});
</${"script"}>
</body>
</html>`;
document.getElementById("iframe").setAttribute("srcdoc", iframeHtml);
</script>
</body>
</html>