Filstack PDF Preview - PoC

.gitignore

dist
node_modules

index.js

const fs = require('fs')
const path = require('path')
const fetch = require('node-fetch')
const minimist = require('minimist')

const { key, file } = minimist(process.argv.slice(2))

request({ docinfo: true })
  .then((res) => res.json())
  .then((info) => {
    if (!info || !info.numpages) throw new Error('Invalid doc')

    const pages = times(info.numpages).map((page) => {
      return request({
        secure: true,
        format: 'jpg',
        page
      }).then((res) => new Promise((resolve, reject) => {
        const dest = path.join(__dirname, 'dist', `page-${page}.jpg`)
        const stream = fs.createWriteStream(dest)

        stream.on('error', reject)
        stream.on('finish', resolve)

        res.body.pipe(stream)
      }))
    })

    return Promise.all(pages)
  })
  .then(() => {
    console.log('Done!')
    process.exit(0)
  })
  .catch((err) => {
    console.error(err)
    process.exit(1)
  })

function request (params = {}) {
  const output = Object.keys(params).map((param) => {
    return `${param}:${params[param]}`
  }).join(',')

  const url = `https://process.filestackapi.com/${key}/output=${output}/${file}`

  return fetch(url).then((res) => {
    if (!res.ok) throw res
    return res
  }).catch((err) => { throw err })
}

function times (length) {
  return Array.from(Array(length)).map((item, index) => index + 1)
}

package-lock.json

{
  "name": "filestack-preview",
  "version": "1.0.0",
  "lockfileVersion": 1,
  "dependencies": {
    "encoding": {
      "version": "0.1.12",
      "resolved": "https://registry.npmjs.org/encoding/-/encoding-0.1.12.tgz",
      "integrity": "sha1-U4tm8+5izRq1HsMjgp0flIDHS+s="
    },
    "iconv-lite": {
      "version": "0.4.18",
      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.18.tgz",
      "integrity": "sha512-sr1ZQph3UwHTR0XftSbK85OvBbxe/abLGzEnPENCQwmHf7sck8Oyu4ob3LgBxWWxRoM+QszeUyl7jbqapu2TqA=="
    },
    "is-stream": {
      "version": "1.1.0",
      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-1.1.0.tgz",
      "integrity": "sha1-EtSj3U5o4Lec6428hBc66A2RykQ="
    },
    "minimist": {
      "version": "1.2.0",
      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.0.tgz",
      "integrity": "sha1-o1AIsg9BOD7sH7kU9M1d95omQoQ="
    },
    "node-fetch": {
      "version": "1.7.1",
      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-1.7.1.tgz",
      "integrity": "sha512-j8XsFGCLw79vWXkZtMSmmLaOk9z5SQ9bV/tkbZVCqvgwzrjAGq66igobLofHtF63NvMTp2WjytpsNTGKa+XRIQ=="
    }
  }
}

package.json

{
  "name": "filestack-preview",
  "version": "1.0.0",
  "private": true,
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "repository": {
    "type": "git",
    "url": "git+ssh://git@gist.github.com/4856a378d0e3aebf7dbd88283d6f3348.git"
  },
  "author": "mjlescano",
  "license": "MIT",
  "bugs": {
    "url": "https://gist.github.com/4856a378d0e3aebf7dbd88283d6f3348"
  },
  "homepage": "https://gist.github.com/4856a378d0e3aebf7dbd88283d6f3348",
  "dependencies": {
    "minimist": "^1.2.0",
    "node-fetch": "^1.7.1"
  }
}