65 lines
1.6 KiB
JavaScript
65 lines
1.6 KiB
JavaScript
import {join, parse, normalize, sep} from 'path'
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import fs from 'mz/fs'
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export function pageNotFoundError (page) {
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const err = new Error(`Cannot find module for page: ${page}`)
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err.code = 'ENOENT'
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return err
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}
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export function normalizePagePath (page) {
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// If the page is `/` we need to append `/index`, otherwise the returned directory root will be bundles instead of pages
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if (page === '/') {
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page = '/index'
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}
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// Resolve on anything that doesn't start with `/`
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if (page[0] !== '/') {
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page = `/${page}`
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}
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// Windows compatibility
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if (sep !== '/') {
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page = page.replace(/\//g, sep)
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}
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// Throw when using ../ etc in the pathname
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const resolvedPage = normalize(page)
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if (page !== resolvedPage) {
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throw new Error('Requested and resolved page mismatch')
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}
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return page
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}
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export function getPagePath (page, {dir, dist}) {
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const pageBundlesPath = join(dir, dist, 'dist', 'bundles', 'pages')
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try {
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page = normalizePagePath(page)
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} catch (err) {
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console.error(err)
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throw pageNotFoundError(page)
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}
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const pagePath = join(pageBundlesPath, page) // Path to the page that is to be loaded
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// Don't allow wandering outside of the bundles directory
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const pathDir = parse(pagePath).dir
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if (pathDir.indexOf(pageBundlesPath) !== 0) {
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console.error('Resolved page path goes outside of bundles path')
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throw pageNotFoundError(page)
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}
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return pagePath
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}
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export default async function requirePage (page, {dir, dist}) {
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const pagePath = getPagePath(page, {dir, dist}) + '.js'
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const fileExists = await fs.exists(pagePath)
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if (!fileExists) {
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throw pageNotFoundError(page)
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}
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return require(pagePath)
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}
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