src/client/shared/blob.ts

import { rewriteBlob, unrewriteBlob } from "../../shared/rewriters/url";
import { ScramjetClient } from "../client";
export default function (client: ScramjetClient) {
	// hide the origin from object urls from the page
	client.Proxy("URL.createObjectURL", {
		apply(ctx) {
			const url: string = ctx.call();
			if (url.startsWith("blob:")) {
				ctx.return(rewriteBlob(url, client.meta));
			} else {
				ctx.return(url);
			}
		},
	});

	client.Proxy("URL.revokeObjectURL", {
		apply(ctx) {
			ctx.args[0] = unrewriteBlob(ctx.args[0]);
		},
	});
}