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August 3, 2022 02:14
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cloudflare worker to get my custom domain working with notion
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/* CONFIGURATION STARTS HERE */ | |
/* Step 1: enter your domain name like fruitionsite.com */ | |
const MY_DOMAIN = 'surfskate.io'; | |
/* | |
* Step 2: enter your URL slug to page ID mapping | |
* The key on the left is the slug (without the slash) | |
* The value on the right is the Notion page ID | |
*/ | |
const SLUG_TO_PAGE = { | |
'': '0ac1b2287a6a486da5ad7cfaf34d17ba', | |
}; | |
/* Step 3: enter your page title and description for SEO purposes */ | |
const PAGE_TITLE = 'SurfSkate SG'; | |
const PAGE_DESCRIPTION = 'SurfSkate things in Singapore'; | |
/* Step 4: enter a Google Font name, you can choose from https://fonts.google.com */ | |
const GOOGLE_FONT = ''; | |
/* Step 5: enter any custom scripts you'd like */ | |
const CUSTOM_SCRIPT = ``; | |
/* CONFIGURATION ENDS HERE */ | |
const PAGE_TO_SLUG = {}; | |
const slugs = []; | |
const pages = []; | |
Object.keys(SLUG_TO_PAGE).forEach(slug => { | |
const page = SLUG_TO_PAGE[slug]; | |
slugs.push(slug); | |
pages.push(page); | |
PAGE_TO_SLUG[page] = slug; | |
}); | |
addEventListener('fetch', event => { | |
event.respondWith(fetchAndApply(event.request)); | |
}); | |
function generateSitemap() { | |
let sitemap = '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'; | |
slugs.forEach( | |
(slug) => | |
(sitemap += | |
'<url><loc>https://' + MY_DOMAIN + '/' + slug + '</loc></url>') | |
); | |
sitemap += '</urlset>'; | |
return sitemap; | |
} | |
const corsHeaders = { | |
'Access-Control-Allow-Origin': '*', | |
'Access-Control-Allow-Methods': 'GET, HEAD, POST, PUT, OPTIONS', | |
'Access-Control-Allow-Headers': 'Content-Type', | |
}; | |
function handleOptions(request) { | |
if (request.headers.get('Origin') !== null && | |
request.headers.get('Access-Control-Request-Method') !== null && | |
request.headers.get('Access-Control-Request-Headers') !== null) { | |
// Handle CORS pre-flight request. | |
return new Response(null, { | |
headers: corsHeaders | |
}); | |
} else { | |
// Handle standard OPTIONS request. | |
return new Response(null, { | |
headers: { | |
'Allow': 'GET, HEAD, POST, PUT, OPTIONS', | |
} | |
}); | |
} | |
} | |
async function fetchAndApply(request) { | |
if (request.method === 'OPTIONS') { | |
return handleOptions(request); | |
} | |
let url = new URL(request.url); | |
url.hostname = 'www.notion.so'; | |
if (url.pathname === '/robots.txt') { | |
return new Response('Sitemap: https://' + MY_DOMAIN + '/sitemap.xml'); | |
} | |
if (url.pathname === '/sitemap.xml') { | |
let response = new Response(generateSitemap()); | |
response.headers.set('content-type', 'application/xml'); | |
return response; | |
} | |
let response; | |
if (url.pathname.startsWith('/app') && url.pathname.endsWith('js')) { | |
response = await fetch(url.toString()); | |
let body = await response.text(); | |
response = new Response(body.replace(/www.notion.so/g, MY_DOMAIN).replace(/notion.so/g, MY_DOMAIN), response); | |
response.headers.set('Content-Type', 'application/x-javascript'); | |
return response; | |
} else if ((url.pathname.startsWith('/api'))) { | |
// Forward API | |
response = await fetch(url.toString(), { | |
body: url.pathname.startsWith('/api/v3/getPublicPageData') ? null : request.body, | |
headers: { | |
'content-type': 'application/json;charset=UTF-8', | |
'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36' | |
}, | |
method: 'POST', | |
}); | |
response = new Response(response.body, response); | |
response.headers.set('Access-Control-Allow-Origin', '*'); | |
return response; | |
} else if (slugs.indexOf(url.pathname.slice(1)) > -1) { | |
const pageId = SLUG_TO_PAGE[url.pathname.slice(1)]; | |
return Response.redirect('https://' + MY_DOMAIN + '/' + pageId, 301); | |
} else { | |
response = await fetch(url.toString(), { | |
body: request.body, | |
headers: request.headers, | |
method: request.method, | |
}); | |
response = new Response(response.body, response); | |
response.headers.delete('Content-Security-Policy'); | |
response.headers.delete('X-Content-Security-Policy'); | |
} | |
return appendJavascript(response, SLUG_TO_PAGE); | |
} | |
class MetaRewriter { | |
element(element) { | |
if (PAGE_TITLE !== '') { | |
if (element.getAttribute('property') === 'og:title' | |
|| element.getAttribute('name') === 'twitter:title') { | |
element.setAttribute('content', PAGE_TITLE); | |
} | |
if (element.tagName === 'title') { | |
element.setInnerContent(PAGE_TITLE); | |
} | |
} | |
if (PAGE_DESCRIPTION !== '') { | |
if (element.getAttribute('name') === 'description' | |
|| element.getAttribute('property') === 'og:description' | |
|| element.getAttribute('name') === 'twitter:description') { | |
element.setAttribute('content', PAGE_DESCRIPTION); | |
} | |
} | |
if (element.getAttribute('property') === 'og:url' | |
|| element.getAttribute('name') === 'twitter:url') { | |
element.setAttribute('content', MY_DOMAIN); | |
} | |
if (element.getAttribute('name') === 'apple-itunes-app') { | |
element.remove(); | |
} | |
} | |
} | |
class HeadRewriter { | |
element(element) { | |
if (GOOGLE_FONT !== '') { | |
element.append(`<link href="https://fonts.googleapis.com/css?family=${GOOGLE_FONT.replace(' ', '+')}:Regular,Bold,Italic&display=swap" rel="stylesheet"> | |
<style>* { font-family: "${GOOGLE_FONT}" !important; }</style>`, { | |
html: true | |
}); | |
} | |
element.append(`<style> | |
div.notion-topbar > div > div:nth-child(3) { display: none !important; } | |
div.notion-topbar > div > div:nth-child(4) { display: none !important; } | |
div.notion-topbar > div > div:nth-child(5) { display: none !important; } | |
div.notion-topbar > div > div:nth-child(6) { display: none !important; } | |
div.notion-topbar-mobile > div:nth-child(3) { display: none !important; } | |
div.notion-topbar-mobile > div:nth-child(4) { display: none !important; } | |
div.notion-topbar > div > div:nth-child(1n).toggle-mode { display: block !important; } | |
div.notion-topbar-mobile > div:nth-child(1n).toggle-mode { display: block !important; } | |
</style>`, { | |
html: true | |
}) | |
} | |
} | |
class BodyRewriter { | |
constructor(SLUG_TO_PAGE) { | |
this.SLUG_TO_PAGE = SLUG_TO_PAGE; | |
} | |
element(element) { | |
element.append(`<div style="display:none">Powered by <a href="http://fruitionsite.com">Fruition</a></div> | |
<script> | |
window.CONFIG.domainBaseUrl = location.origin; | |
const SLUG_TO_PAGE = ${JSON.stringify(this.SLUG_TO_PAGE)}; | |
const PAGE_TO_SLUG = {}; | |
const slugs = []; | |
const pages = []; | |
const el = document.createElement('div'); | |
let redirected = false; | |
Object.keys(SLUG_TO_PAGE).forEach(slug => { | |
const page = SLUG_TO_PAGE[slug]; | |
slugs.push(slug); | |
pages.push(page); | |
PAGE_TO_SLUG[page] = slug; | |
}); | |
function getPage() { | |
return location.pathname.slice(-32); | |
} | |
function getSlug() { | |
return location.pathname.slice(1); | |
} | |
function updateSlug() { | |
const slug = PAGE_TO_SLUG[getPage()]; | |
if (slug != null) { | |
history.replaceState(history.state, '', '/' + slug); | |
} | |
} | |
function onDark() { | |
el.innerHTML = '<div title="Change to Light Mode" style="margin-left: auto; margin-right: 14px; min-width: 0px;"><div role="button" tabindex="0" style="user-select: none; transition: background 120ms ease-in 0s; cursor: pointer; border-radius: 44px;"><div style="display: flex; flex-shrink: 0; height: 14px; width: 26px; border-radius: 44px; padding: 2px; box-sizing: content-box; background: rgb(46, 170, 220); transition: background 200ms ease 0s, box-shadow 200ms ease 0s;"><div style="width: 14px; height: 14px; border-radius: 44px; background: white; transition: transform 200ms ease-out 0s, background 200ms ease-out 0s; transform: translateX(12px) translateY(0px);"></div></div></div></div>'; | |
document.body.classList.add('dark'); | |
__console.environment.ThemeStore.setState({ mode: 'dark' }); | |
}; | |
function onLight() { | |
el.innerHTML = '<div title="Change to Dark Mode" style="margin-left: auto; margin-right: 14px; min-width: 0px;"><div role="button" tabindex="0" style="user-select: none; transition: background 120ms ease-in 0s; cursor: pointer; border-radius: 44px;"><div style="display: flex; flex-shrink: 0; height: 14px; width: 26px; border-radius: 44px; padding: 2px; box-sizing: content-box; background: rgba(135, 131, 120, 0.3); transition: background 200ms ease 0s, box-shadow 200ms ease 0s;"><div style="width: 14px; height: 14px; border-radius: 44px; background: white; transition: transform 200ms ease-out 0s, background 200ms ease-out 0s; transform: translateX(0px) translateY(0px);"></div></div></div></div>'; | |
document.body.classList.remove('dark'); | |
__console.environment.ThemeStore.setState({ mode: 'light' }); | |
} | |
function toggle() { | |
if (document.body.classList.contains('dark')) { | |
onLight(); | |
} else { | |
onDark(); | |
} | |
} | |
function addDarkModeButton(device) { | |
const nav = device === 'web' ? document.querySelector('.notion-topbar').firstChild : document.querySelector('.notion-topbar-mobile'); | |
el.className = 'toggle-mode'; | |
el.addEventListener('click', toggle); | |
nav.appendChild(el); | |
onLight(); | |
} | |
const observer = new MutationObserver(function() { | |
if (redirected) return; | |
const nav = document.querySelector('.notion-topbar'); | |
const mobileNav = document.querySelector('.notion-topbar-mobile'); | |
if (nav && nav.firstChild && nav.firstChild.firstChild | |
|| mobileNav && mobileNav.firstChild) { | |
redirected = true; | |
updateSlug(); | |
addDarkModeButton(nav ? 'web' : 'mobile'); | |
const onpopstate = window.onpopstate; | |
window.onpopstate = function() { | |
if (slugs.includes(getSlug())) { | |
const page = SLUG_TO_PAGE[getSlug()]; | |
if (page) { | |
history.replaceState(history.state, 'bypass', '/' + page); | |
} | |
} | |
onpopstate.apply(this, [].slice.call(arguments)); | |
updateSlug(); | |
}; | |
} | |
}); | |
observer.observe(document.querySelector('#notion-app'), { | |
childList: true, | |
subtree: true, | |
}); | |
const replaceState = window.history.replaceState; | |
window.history.replaceState = function(state) { | |
if (arguments[1] !== 'bypass' && slugs.includes(getSlug())) return; | |
return replaceState.apply(window.history, arguments); | |
}; | |
const pushState = window.history.pushState; | |
window.history.pushState = function(state) { | |
const dest = new URL(location.protocol + location.host + arguments[2]); | |
const id = dest.pathname.slice(-32); | |
if (pages.includes(id)) { | |
arguments[2] = '/' + PAGE_TO_SLUG[id]; | |
} | |
return pushState.apply(window.history, arguments); | |
}; | |
const open = window.XMLHttpRequest.prototype.open; | |
window.XMLHttpRequest.prototype.open = function() { | |
arguments[1] = arguments[1].replace('${MY_DOMAIN}', 'www.notion.so'); | |
return open.apply(this, [].slice.call(arguments)); | |
}; | |
</script>${CUSTOM_SCRIPT}`, { | |
html: true | |
}); | |
} | |
} | |
async function appendJavascript(res, SLUG_TO_PAGE) { | |
return new HTMLRewriter() | |
.on('title', new MetaRewriter()) | |
.on('meta', new MetaRewriter()) | |
.on('head', new HeadRewriter()) | |
.on('body', new BodyRewriter(SLUG_TO_PAGE)) | |
.transform(res); | |
} |
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