Download File

import { WebClient } from "@slack/web-api"

import * as wmill from "windmill-client"

import { S3Object } from "windmill-client"

/**

 * Download File

 * Download a file's content by ID (e.g. from a message's `files` or List Files) into Windmill object storage, at `output_s3_path` or a generated key. Returns the S3 reference plus the file's metadata. Needs files:read (user-token default; tick it for a bot token, which also only sees files shared where it is a member).

 */

export async function main(

  auth: RT.Slack,

  file: string,

  output_s3_path?: string

) {

  const client = new WebClient(auth.token)

  const { file: info } = await client.files.info({ file })

  const response = await fetch(info!.url_private_download!, {

    headers: { Authorization: `Bearer ${auth.token}` },

  })

  if (!response.ok) {

    throw new Error(`${response.status} ${await response.text()}`)

  }

  const s3: S3Object = await wmill.writeS3File(

    output_s3_path ? { s3: output_s3_path } : undefined,

    await response.blob(),

    undefined,

    info!.mimetype

  )

  return { s3, file: info }

}