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export 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 = ${JSON.stringify($scramjetVersion)};
build.textContent = ${JSON.stringify($scramjetVersion)};
document.getElementById('copy-button').addEventListener('click', async () => {
const text = document.getElementById('errorTrace').value;
await navigator.clipboard.writeText(text);
const btn = document.getElementById('copy-button');
btn.textContent = 'Copied!';
setTimeout(() => btn.textContent = 'Copy', 2000);
});
`;
return `<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Scramjet</title>
<style>
:root {
--deep: #080602;
--shallow: #181412;
--beach: #f1e8e1;
--shore: #b1a8a1;
--accent: #ffa938;
--font-sans: -apple-system, system-ui, BlinkMacSystemFont, sans-serif;
--font-monospace: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}
*:not(div,p,span,ul,li,i,span) {
background-color: var(--deep);
color: var(--beach);
font-family: var(--font-sans);
}
textarea,
button {
background-color: var(--shallow);
border-radius: 0.6em;
padding: 0.6em;
border: none;
appearance: none;
font-family: var(--font-sans);
color: var(--beach);
}
button.primary {
background-color: var(--accent);
color: var(--deep);
font-weight: bold;
}
textarea {
resize: none;
height: 20em;
text-align: left;
font-family: var(--font-monospace);
}
body {
width: 100vw;
height: 100vh;
justify-content: center;
align-items: center;
}
body,
html,
#inner {
display: flex;
align-items: center;
flex-direction: column;
gap: 0.5em;
overflow: hidden;
}
#inner {
z-index: 100;
}
#cover {
position: absolute;
width: 100%;
height: 100%;
background-color: color-mix(in srgb, var(--deep) 70%, transparent);
z-index: 99;
}
#info {
display: flex;
flex-direction: row;
align-items: flex-start;
gap: 1em;
}
#version-wrapper {
width: auto;
text-align: right;
position: absolute;
top: 0.5rem;
right: 0.5rem;
font-size: 0.8rem;
color: var(--shore)!important;
i {
background-color: color-mix(in srgb, var(--deep), transparent 50%);
border-radius: 9999px;
padding: 0.2em 0.5em;
}
z-index: 101;
}
#errorTrace-wrapper {
position: relative;
width: fit-content;
}
#copy-button {
position: absolute;
top: 0.5em;
right: 0.5em;
padding: 0.23em;
cursor: pointer;
opacity: 0;
transition: opacity 0.4s;
font-size: 0.9em;
}
#errorTrace-wrapper:hover #copy-button {
opacity: 1;
}
</style>
</head>
<body>
<div id="cover"></div>
<div id="inner">
<h1 id="errorTitle">Uh oh!</h1>
<p>There was an error loading <b id="fetchedURL"></b></p>
<!-- <p id="errorMessage">Internal Server Error</p> -->
<div id="info">
<div id="errorTrace-wrapper">
<textarea id="errorTrace" cols="40" rows="10" readonly></textarea>
<button id="copy-button" class="primary">Copy</button>
</div>
<div id="troubleshooting">
<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>
</div>
</div>
<br>
<button id="reload" class="primary">Reload</button>
</div>
<p id="version-wrapper"><i>Scramjet v<span id="version"></span> (build <span id="build"></span>)</i></p>
<script src="${"data:application/javascript," + encodeURIComponent(script)}"></script>
</body>
</html>
`;
}
export function renderError(err: unknown, fetchedURL: string) {
const headers = {
"content-type": "text/html",
};
if (crossOriginIsolated) {
headers["Cross-Origin-Embedder-Policy"] = "require-corp";
}
return new Response(errorTemplate(String(err), fetchedURL), {
status: 500,
headers: headers,
});
}
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