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var fs = require('fs')
var os = require('os')
var path = require('path')
var crypto = require('crypto')
var mkdirp = require('mkdirp')
function getFilename (req, file, cb) {
crypto.randomBytes(16, function (err, raw) {
cb(err, err ? undefined : raw.toString('hex'))
})
}
function getDestination (req, file, cb) {
cb(null, os.tmpdir())
}
function DiskStorage (opts) {
this.getFilename = (opts.filename || getFilename)
if (typeof opts.destination === 'string') {
mkdirp.sync(opts.destination)
this.getDestination = function ($0, $1, cb) { cb(null, opts.destination) }
} else {
this.getDestination = (opts.destination || getDestination)
}
}
DiskStorage.prototype._handleFile = function _handleFile (req, file, cb) {
var that = this
that.getDestination(req, file, function (err, destination) {
if (err) return cb(err)
that.getFilename(req, file, function (err, filename) {
if (err) return cb(err)
var finalPath = path.join(destination, filename)
var outStream = fs.createWriteStream(finalPath)
file.stream.pipe(outStream)
outStream.on('error', cb)
outStream.on('finish', function () {
cb(null, {
destination: destination,
filename: filename,
path: finalPath,
size: outStream.bytesWritten
})
})
})
})
}
DiskStorage.prototype._removeFile = function _removeFile (req, file, cb) {
var path = file.path
delete file.destination
delete file.filename
delete file.path
fs.unlink(path, cb)
}
module.exports = function (opts) {
return new DiskStorage(opts)
}