52 lines
2.5 KiB
HTML
52 lines
2.5 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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</head>
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<body>
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<iframe id="iframe" sandbox="allow-scripts allow-downloads allow-downloads-without-user-activation"></iframe>
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<script type="text/javascript">
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const iframeHtml = `
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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</head>
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<body>
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<button id="download">Download</button>
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<a id="link" href="#">Link to progamatically click</a>
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<script type="text/javascript">
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var link = document.getElementById("link");
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var button = document.getElementById("download");
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async function download(blob, filename) {
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const slice = blob.slice(0, 1);
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const reader = new FileReader();
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reader.readAsArrayBuffer(slice);
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const buffer = await new Promise((resolve, reject) => {
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reader.addEventListener("abort", () => reject(new Error("aborted")));
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reader.addEventListener("error", e => reject(e.error));
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reader.addEventListener("load", e => resolve(e.target.result));
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});
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document.body.appendChild(document.createTextNode("buffer: " + new Uint8Array(buffer)[0] + " (" + buffer.byteLength + ")"));
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var url = URL.createObjectURL(blob);
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link.href = url;
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link.download = filename;
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link.innerText = url;
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link.click();
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URL.revokeObjectURL(url);
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}
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button.addEventListener("click", async function(event) {
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try {
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await download(new Blob(["a message from the iframe"], {type: "text/plain"}), "hello world.txt");
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} catch (err) {
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document.body.appendChild(document.createTextNode(err.toString()));
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}
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});
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</${"script"}>
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</body>
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</html>`;
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document.getElementById("iframe").setAttribute("srcdoc", iframeHtml);
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</script>
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</body>
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</html>
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