file-slicer

Thin slice upload.

Usage

npm i file-slicer -S

server.js

const express = require('express')
const path = require('path')
const fileSlicer = require('file-slicer')

const app = express()
app.use('/upload', fileSlicer.middleware({
  // tmpDir: '/tmp',
  // override: false,
  // strictPath: true,
  // busboyConfig: {},
  // propertyName: 'files',
  // returnAbsPath ({id, name, tmpDir, dir, override, req, res}) {
  //  return path.join(tmpDir, dir || '.', name)
  // },
}))
app.use((req, res) => {
  res.json(req.files)
})
app.listen(3000)

client.js (in Node.js)

const {postFile, generateFileId} = require('file-slicer')

const file = '/Users/xxx/Downloads/xxxx.zip'
postFile('http://127.0.0.1:3000/upload', file, {
  // chunkSize: 1024 * 1024, // 1MB
  // stat: null, // only Node.js
  // headers: {},
  // skipTest: false,
  // resumable: false,
  // fieldName: 'chunk',
  // fileDir: '.',
  // fileId: generateFileId(), // for batch
  // onProgress (loaded, total, size) => {
  //   console.log(loaded +'/'+ total)
  // },
}).then(res => res.json()).then(console.log, console.error)
  // [{name: 'xxxx.zip', path: '/tmp/<uuid>.zip', field: 'chunk'}]

client.js (in Browser)

const {postFile} = require('file-slicer')

document.querySelector('input[type=file]').onchange = evt => {
  const file = evt.target.files[0]
  postFile('http://127.0.0.1:3000/upload', file, {
    // as above
  })
}

upload.js (in Node.js and Browser)

const FormData = require('form-data')
const {Base64} = require('js-base64')
const {FileSlicer} = require('file-slicer')
const fetch = require('isomorphic-fetch-improve')

module.exports = function (url, file) {
  const slicer = new FileSlicer(file, {
    // start: 0,
    // chunkSize: 1024 * 1024, // 1MB
    // stat: null, // only Node.js
  })

  return upload()

  function upload (id = '') {
    if (slicer.hasNext()) {
      const { body, start, end, range } = slicer.next()
      const formData = new FormData()
      formData.append('xxx', body)
      return fetch(url, {
        method: 'POST',
        body: formData,
        headers: {
          range,
          'X-File-Id': id,
          'X-File-Name': Base64.encode(slicer.fileName),
          'X-File-Size': slicer.fileSize,
          // 'X-File-Dir': Base64.encode('.'),
        }
      }).then(res => {
        // console.log(slicer.loaded +'/'+ slicer.total)
        const fileError = res.headers.get('x-file-error')
        if (fileError) {
          throw new Error(Base64.decode(fileError))
        }
        const id = res.headers.get('x-file-id')
        return id ? upload(id) : res
      })
    }
  }
}

CLI

npm i file-slicer -g

# starup a server
file-slicer server -u admin -p 123 -P 8080 .

# upload a folder (keep folder structure)
file-slicer upload http://admin:123@localhost:8080 ./dir

# upload files
file-slicer upload http://admin:123@localhost:8080 ./dir/* ~/hello.js

License

MIT