rn-fetch-blob/test-server/server.js

/**
 * @author wkh237
 * @description react-native-fetch-blob test & dev server
 */

var express = require('express')
var bodyParser = require('body-parser')
var chokidar = require('chokidar')
var multer = require('multer')
var upload = multer({dest : 'uploads/'})
var chalk = require('chalk')
var mkdirp = require('mkdirp')
var dirname = require('path').dirname
var app = express()
var fs = require('fs')

var JS_SOURCE_PATH = '../test/',
    LIB_SOURCE_PATH = '../src/',
    NODE_MODULE_MODULE_PATH = '../RNFetchBlobTest/node_modules/react-native-fetch-blob/',
    APP_SOURCE_PATH = '../RNFetchBlobTest/'

// watch test app source
watch(JS_SOURCE_PATH, APP_SOURCE_PATH)
// watch lib js source
watch(LIB_SOURCE_PATH, NODE_MODULE_MODULE_PATH, {ignored: /\.\.\/src\/(android|ios)\//})

app.listen(8123, function(err){
  if(!err)
    console.log('test server running at port ',8123)
})


app.use(function(req,res,next){
  console.log(chalk.green('request url=') + chalk.magenta(req.url))
  next()
})

app.use(upload.any())
app.use('/public', express.static('./public'))
// for redirect test
app.get('/redirect', function(req, res) {
  res.redirect('/public/github.png')
})

// return an empty response
app.all('/empty', function(req, res) {
  res.send('')
})
// handle multipart/form-data request
app.post('/upload-form', function(req, res) {
  console.log(req.headers)
  console.log(req.body)
  console.log(req.files)
  if(Array.isArray(req.files)) {
    req.files.forEach((f) => {
      console.log(process.cwd() + f.path, '=>', process.cwd() + '/public/' + f.originalname)
      fs.renameSync('./' + f.path, './public/'+ f.originalname)
    })
  }
  res.status(200).send({
    fields : req.body,
    files : req.files
  })
})

function watch(source, dest, ignore) {
  // watch files in  test folder
  chokidar
    .watch(source, ignore)
    .on('add', function(path) {
      console.log(chalk.magenta('file created'), path)
      var targetPath = String(path).replace(source, dest)
      mkdirp(dirname(targetPath), function (err) {
      if (err) return cb(err)
        fs.writeFileSync(targetPath, fs.readFileSync(path))
      })
    })
    .on('change', function(path) {
      console.log(chalk.green('file changed'), path)
      var targetPath = String(path).replace(source, dest)
      mkdirp(dirname(targetPath), function (err) {
      if (err) return cb(err)
        fs.writeFileSync(targetPath, fs.readFileSync(path))
      })
    })
    .on('unlink', function(path) {
      console.log(chalk.red('file removed'), path)
      var targetPath = String(path).replace(source, dest)
      mkdirp(dirname(targetPath), function (err) {
      if (err) return cb(err)
        fs.unlinkSync(targetPath)
      })
    })
    .on('error', function(err){
      console.log(err)
    })
}