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maintenance.js
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maintenance.js
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addEventListener("fetch", event => {
event.respondWith(fetchAndReplace(event.request))
})
async function fetchAndReplace(request) {
let modifiedHeaders = new Headers()
modifiedHeaders.set('Content-Type', 'text/html')
modifiedHeaders.append('Pragma', 'no-cache')
// Allow users from configured IPs into site
if (WHITELIST_IPS !== "null") {
if (WHITELIST_IPS.split(',').indexOf(request.headers.get("cf-connecting-ip")) > -1)
{
return fetch(request)
}
}
// Allow users to access paths that are whitelisted using regex expressions
if (WHITELIST_PATH !== "null") {
const { pathname } = new URL(request.url);
if (pathname.match(WHITELIST_PATH))
{
return fetch(request)
}
}
// Return modified response.
return new Response(maintenancePage, {
status: 503,
headers: modifiedHeaders
})
}
const maintenancePage = `
<!doctype html>
<head>
<title>Site Maintenance</title>
<link href="https://fonts.googleapis.com/css2?family=${google_font}&display=swap" rel="stylesheet"/>
<meta content="width=device-width, initial-scale=1" name="viewport" />
<link rel="icon" href="${favicon_url}"/>
<style>
body {
text-align: center;
font-family: "${font}", sans-serif;
color: #0C1231;
}
.logo {
margin-top: 3rem;
max-height: 35px;
width: auto;
}
.content {
margin: 0 auto;
max-width: 1000px;
width: 90%;
}
.info {
margin: 0 auto;
margin-top: 3rem;
max-width: 500px;
}
h1 {
font-weight: 600;
font-size: 1.8rem;
}
.image-main {
margin-top: 3rem;
max-width: 90%;
}
hr {
border: 1px solid rgba(0, 0, 0, 0.08);
margin: 0 auto;
margin-top: 2rem;
margin-bottom: 1rem;
max-width: 90%;
}
a {
text-decoration: none;
color: #535353
}
a:hover {
color: #0C1231;
}
@media (min-width: 968px) {
.logo {
max-height: 45px;
}
h1 {
font-size: 2.5rem;
}
.info {
margin-top: 6rem;
}
hr {
margin-top: 6rem;
margin-bottom: 3rem;
}
}
</style>
</head>
<body>
<div class="content">
<img class="logo" src="${logo_url}" alt="${company_name}">
<div class="info">
<h1>Our site is currently down for maintenance</h1>
<p>We apologize for any inconvenience caused and we will be online as soon as possible. Please check again in a little while. Thank you!</p>
%{ if statuspage_url != "null" }
<p>You can follow the updated information on our <a href="${statuspage_url}">status page</a>.</p>
%{ endif }
<p>— ${company_name}</p>
</div>
<img class="image-main" src="https://i.imgur.com/0uJkCM8.png" alt="Maintenance image">
<hr />
<a href="mailto:${email}?subject=Maintenance">You can reach us at: ${email}</a>
</div>
</body>
`;