send data as a file to webex user or room using node-fetch

send-webex-file.js

require('dotenv').config()
const fetch = require('node-fetch')

async function sendWebexFile ({
  filename = 'test.csv',
  fileMetaName = 'files',
  contentType = 'text/csv',
  content,
  metadata = {}
}) {
  try {
    // build the payload body
    const boundary = 'xxxxxxxxxx'
    let data = ''
    // append each metadata field to the body
    for(const i in metadata) {
      if ({}.hasOwnProperty.call(metadata, i)) {
        data += `--${boundary}\r\n`
        data += `Content-Disposition: form-data; name="${i}"; \r\n\r\n${metadata[i]}\r\n`
      }
    }
    data += `--${boundary}\r\n`
    // append the file
    data += `Content-Disposition: form-data; name="${fileMetaName}"; filename="${filename}"\r\n`
    // append file content type
    data += `Content-Type: ${contentType}\r\n\r\n`

    const body = Buffer.concat([
      Buffer.from(data, 'utf8'),
      Buffer.from(content, 'utf8'),
      Buffer.from(`\r\n--${boundary}--\r\n`, 'utf8')
    ])

    const options = {
      method: 'POST',
      headers: {
        Authorization: 'Bearer ' + process.env.WEBEX_BOT_TOKEN,
        'Content-Type': `multipart/form-data; boundary=${boundary}`
      },
      body
    }

    const url = 'https://webexapis.com/v1/messages'
    const response = await fetch(url, options)
    // parse response body
    const json = await response.json()
    // check response status code
    if (response.ok) {
      return json
    } else {
      throw json
    }
  } catch (e) {
    throw e
  }
}

async function main () {
  try {
    // metadata for the request. these are the other fields of data to send to
    // webex
    const metadata = {
      toPersonEmail: 'ccondry@cisco.com',
      // roomId: 'your-room-id',
      text: `here is a file:`
    }
    // the file data
    const content = 'test1,test2\r\ntrue,false\r\nyes,no'
    // the file content type
    const contentType = 'text/csv'
    await sendWebexFile({
      filename:'test.csv',
      fileMetaName: 'files',
      contentType,
      content,
      metadata
    })
    // done
    console.log('successfully sent file!')
  } catch (e) {
    console.log('error sending file:', e.message)
  }
}

main()