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do some worker tweaks

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Percs 2024-06-17 20:26:09 -05:00
parent 409275fa49
commit 2e962ee1dc
1 changed files with 109 additions and 2 deletions
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111
src/worker/index.ts
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@ -64,7 +64,28 @@ self.ScramjetServiceWorker = class ScramjetServiceWorker {
break;
}
}
// downloads
if (request.destination === "document") {
const header = responseHeaders["content-disposition"];
// validate header and test for filename
if (!/\s*?((inline|attachment);\s*?)filename=/i.test(header)) {
// if filename= wasn"t specified then maybe the remote specified to download this as an attachment?
// if it"s invalid then we can still possibly test for the attachment/inline type
const type = /^\s*?attachment/i.test(header)
? "attachment"
: "inline";
// set the filename
const [filename] = new URL(response.finalURL).pathname
.split("/")
.slice(-1);
responseHeaders[
"content-disposition"
] = `${type}; filename=${JSON.stringify(filename)}`;
}
}
if (responseHeaders["accept"] === "text/event-stream") {
responseHeaders["content-type"] = "text/event-stream";
}
@ -80,8 +101,94 @@ self.ScramjetServiceWorker = class ScramjetServiceWorker {
} catch (err) {
if (!["document", "iframe"].includes(request.destination))
return new Response(undefined, { status: 500 });
console.error(err);
return renderError(err, self.__scramjet$bundle.rewriters.url.decodeUrl(request.url));
}
}
}
function errorTemplate(
trace: string,
fetchedURL: string,
) {
// turn script into a data URI so we don"t have to escape any HTML values
const script = `
errorTrace.value = ${JSON.stringify(trace)};
fetchedURL.textContent = ${JSON.stringify(fetchedURL)};
for (const node of document.querySelectorAll("#hostname")) node.textContent = ${JSON.stringify(
location.hostname
)};
reload.addEventListener("click", () => location.reload());
version.textContent = "0.0.1";
`
return (
`<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Error</title>
<style>
* { background-color: white }
</style>
</head>
<body>
<h1 id="errorTitle">Error processing your request</h1>
<hr />
<p>Failed to load <b id="fetchedURL"></b></p>
<p id="errorMessage">Internal Server Error</p>
<textarea id="errorTrace" cols="40" rows="10" readonly></textarea>
<p>Try:</p>
<ul>
<li>Checking your internet connection</li>
<li>Verifying you entered the correct address</li>
<li>Clearing the site data</li>
<li>Contacting <b id="hostname"></b>"s administrator</li>
<li>Verify the server isn"t censored</li>
</ul>
<p>If you"re the administrator of <b id="hostname"></b>, try:</p>
<ul>
<li>Restarting your server</li>
<li>Updating Scramjet</li>
<li>Troubleshooting the error on the <a href="https://github.com/MercuryWorkshop/scramjet" target="_blank">GitHub repository</a></li>
</ul>
<button id="reload">Reload</button>
<hr />
<p><i>Scramjet v<span id="version"></span></i></p>
<script src="${
"data:application/javascript," + encodeURIComponent(script)
}"></script>
</body>
</html>
`
);
}
/**
*
* @param {unknown} err
* @param {string} fetchedURL
*/
function renderError(err, fetchedURL) {
const headers = {
"content-type": "text/html",
};
if (crossOriginIsolated) {
headers["Cross-Origin-Embedd'er-Policy"] = "require-corp";
}
return new Response(
errorTemplate(
String(err),
fetchedURL
),
{
status: 500,
headers: headers
}
);
}