44 lines
969 B
JavaScript
44 lines
969 B
JavaScript
const fetch = require('node-fetch')
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const path = require('path')
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async function getLatestId () {
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const raw = await fetch(`https://xkcd.com/info.0.json`)
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const data = await raw.json()
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return data.num
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}
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async function getImage (url) {
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const ext = path.extname(url)
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const url2x = `${path.dirname(url)}/${path.basename(url, ext)}_2x${ext}`
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let res = await fetch(url2x)
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if (!res.ok) {
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res = await fetch(url)
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}
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if (!res.ok) {
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throw new Error('bad image request')
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}
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return res.buffer()
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}
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async function getComic (id) {
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const raw = await fetch(`https://xkcd.com/${id}/info.0.json`)
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const data = await raw.json()
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let img = null
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// Some comics, such as 1608 and 1663, are composed by interactive
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// games and cannot be downloaded as images, so we just ignore them.
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if (data.img !== 'https://imgs.xkcd.com/comics/') {
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img = await getImage(data.img)
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}
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return { data, img }
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}
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module.exports = {
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getLatestId,
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getComic
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}
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