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Fix broken notebook loading on firefox by compressing the encoded wasm payload #8426

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Dec 12, 2024
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20 changes: 13 additions & 7 deletions rerun_js/web-viewer/bundle.mjs
Original file line number Diff line number Diff line change
Expand Up @@ -6,25 +6,31 @@
import { fileURLToPath } from "node:url";
import * as path from "node:path";
import * as fs from "node:fs";
import * as zlib from "node:zlib";
import * as util from "node:util";

const __filename = path.resolve(fileURLToPath(import.meta.url));
const __dirname = path.dirname(__filename);

const wasm = fs.readFileSync(path.join(__dirname, "re_viewer_bg.wasm"));
const wasm = zlib.gzipSync(fs.readFileSync(path.join(__dirname, "re_viewer_bg.wasm")));
const js = fs.readFileSync(path.join(__dirname, "re_viewer.js"), "utf-8");
const index = fs.readFileSync(path.join(__dirname, "index.js"), "utf-8");

const INLINE_MARKER = "/*<INLINE-MARKER>*/";

/** @param {Buffer} buffer */
function buffer_to_data_url(buffer) {
return `data:application/wasm;base64,${buffer.toString("base64")}`;
return `data:application/octet-stream;gzip;base64,${buffer.toString("base64")}`;
}

async function data_url_to_buffer(dataUrl) {
const response = await fetch(dataUrl);
return response.arrayBuffer();
async function compressed_data_url_to_buffer(dataUrl) {
const response = await fetch(dataUrl);
const blob = await response.blob();

let ds = new DecompressionStream("gzip");
let decompressedStream = blob.stream().pipeThrough(ds);

return new Response(decompressedStream).arrayBuffer();
}

const inlined_js = js.replace("export default function", "return function");
Expand All @@ -35,9 +41,9 @@ async function fetch_viewer_js() {
}

async function fetch_viewer_wasm() {
${data_url_to_buffer.toString()}
${compressed_data_url_to_buffer.toString()}
const dataUrl = ${JSON.stringify(buffer_to_data_url(wasm))};
const buffer = await data_url_to_buffer(dataUrl);
const buffer = await compressed_data_url_to_buffer(dataUrl);
return new Response(buffer, { "headers": { "Content-Type": "application/wasm" } });
}
`;
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