Create main.coffee

main.coffee

@@ -0,0 +1,56 @@
+fs = require 'fs'
+os = require 'os'
+bytes = require 'bytes'
+express = require 'express'
+{ fromBuffer } = require 'file-type'
+
+limitSize = '500mb'
+tmpFolder = os.tmpdir()
+
+isBase64 = (str) ->
+	try
+		btoa(atob(str)) is str
+	catch
+		false
+
+app = express()
+app.set 'json spaces', 4
+# limit upload file
+app.use express.json limit: limitSize
+app.use express.urlencoded extended: true, limit: limitSize
+# logger
+app.use (req, res, next) ->
+	time = new Date().toLocaleString 'id', timeZone: 'Asia/Jakarta'
+	console.log "[#{time}] #{req.method}: #{req.url}"
+	next()
+# allow user to access file in tmpFolder
+app.use '/file', express.static tmpFolder
+
+app.all '/', (_, res) -> res.send 'POST /upload'
+
+app.all '/upload', (req, res) ->
+	if req.method isnt 'POST'
+		res.json message: 'Method not allowed'
+
+	{ file } = req.body
+	if not file and typeof file isnt 'string' and not isBase64 file
+		res.json message: 'Payload body file must be filled in base64 format'
+
+	fileBuffer = Buffer.from file, 'base64'
+	ftype = await fromBuffer fileBuffer
+	if not ftype then ftype = mime: 'file', ext: 'bin'
+	
+	randomName = Math.random().toString(36).slice(2)
+	fileName = "#{ftype.mime.split('/')[0]}-#{randomName}.#{ftype.ext}"
+	await fs.promises.writeFile "#{tmpFolder}/#{fileName}", fileBuffer
+		
+	res.json
+		name: fileName,
+		size:
+			bytes: fileBuffer.length,
+			readable: bytes fileBuffer.length, unitSeparator: ' '
+		,
+		type: ftype,
+		url: "https://#{process.env.SPACE_HOST}/file/#{fileName}"
+
+app.listen 7860, () -> console.log 'App running on port', 7860