const express = require('express')
const path = require('path')
const fs = require('fs')
const crypto = require('crypto')
const fsp = fs.promises
const router = express.Router()
const cfgLoader = require(path.join('..', '..', 'config-loader'))(path.join(__dirname, 'config.json'), {
root: path.join(process.cwd(), '..', 'fiche', 'code'),
style: 'tomorrow-night',
index: 'index.html',
})
function calculateHash(file, type){
const testFile = fs.readFileSync(file);
const shasum = crypto.createHash('sha384')
.update(testFile)
.digest('base64');
return `sha384-${shasum}`
}
function encodeSpecial (string) {
let i = string.length
const a = []
while (i--) {
var iC = string[i].charCodeAt()
if (iC < 65 || iC > 127 || (iC > 90 && iC < 97)) {
a[i] = '&#' + iC + ';'
} else {
a[i] = string[i]
}
}
return a.join('')
}
async function init () {
const config = await cfgLoader
const root = path.resolve(config.root)
const themeFile = path.join(__dirname, `${config.style}.css`)
const scriptFile = path.join(__dirname, 'highlight.min.js')
const themeFileHash = calculateHash(themeFile)
const scriptFileHash = calculateHash(scriptFile)
await fsp.mkdir(root, { recursive: true })
await fsp.access(root, fs.constants.F_OK)
router.get('/theme.css', (req, res) => {
res.header('Cache-Control', 'max-age=' + 7 * 24 * 60 * 60 * 1000)
res.sendFile(themeFile)
});
router.get('/script.js', (req, res) => {
res.header('Cache-Control', 'max-age=' + 7 * 24 * 60 * 60 * 1000)
res.sendFile(scriptFile)
});
router.get('/:name', async (req, res, next) => {
const name = req.params.name
if (name.length > 5) {
try {
const text = await fsp.readFile(path.join(root, 'index.html'))
res.send(text)
} catch (e) {
res.status(403)
}
return res.end()
}
const fichePath = path.join(root, name, 'index.txt')
const ua = req.get('User-Agent')
let reqRaw = req.query.raw != null
if (!reqRaw && ua && (ua.match(/curl\//i) != null || ua.match(/wget\//i) != null)) reqRaw = true
let text
try {
text = await fsp.readFile(fichePath, { encoding: 'utf8' })
} catch (e) {
return res.status(404).end()
}
res.header('Cache-Control', 'max-age=' + 7 * 24 * 60 * 60 * 1000)
if (reqRaw) {
return res.set('Content-Type', 'text/plain').send(text)
}
const etext = encodeSpecial(text)
const payload = `
${etext}
`
res.set('Content-Type', 'text/html; charset=UTF-8').send(payload)
})
router.get('/', (req, res, next) => {
if (!config.index) {
return next()
}
let inp = config.index
if (inp.indexOf('/') !== 0) {
inp = path.join(__dirname, inp)
} else {
inp = path.resolve(inp)
}
res.sendFile(inp)
})
return router
}
module.exports = init