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image_proxy.js
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image_proxy.js
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// This is an image proxy service for the Google Books API's book cover functionality.
// Example usage: https://readinglist-cover-proxy.srg.id.au/A2wJAAAAQAAJ.jpg
// It is a small piece of code developed because Notion has (for some reason) stopped accepting
// cover image URLs that don't end in an image file extension.
// !!!! This should not be used in the repl.it server. It is only here for the purpose of informing
// users on why there is a proxy service in the first place. If you want to run your own, you can
// copy this code to Cloudflare Workers or a similar function-as-a-service provider.
addEventListener("fetch", event => {
event.respondWith(handleRequest(event.request))
})
async function handleRequest(request) {
const url = new URL(request.url);
const pathname = url.pathname.split("/")[url.pathname.split("/").length - 1]
if (pathname == "") {
// Redirect user to info page
return Response.redirect("https://srg.id.au/notion-reading-list/#image-proxy")
}
const id = pathname.split(".")[0];
console.log(pathname, id)
const gbResponse = await (await fetch("https://www.googleapis.com/books/v1/volumes/" + id)).json();
const coverUrl = gbResponse?.volumeInfo?.imageLinks?.thumbnail;
if (!coverUrl) {
return new Response("This book doesn't have a cover available.", { status: 404 })
}
console.log(coverUrl)
return new Response(await (await fetch(coverUrl)).blob(), {
cacheEverything: true, // For Cloudflare Workers
})
}