toolkit/packages/cache/src/internal/blob/download-cache.ts

import * as core from '@actions/core'

import {
  BlobClient,
  BlockBlobClient,
  BlobDownloadOptions,
} from '@azure/storage-blob'

export async function DownloadCacheFile(
  signedUploadURL: string,
  archivePath: string,
): Promise<{}> {
  const downloadOptions: BlobDownloadOptions = {
    maxRetryRequests: 5,
  }

  // TODO: tighten the configuration and pass the appropriate user-agent
  const blobClient: BlobClient = new BlobClient(signedUploadURL)
  const blockBlobClient: BlockBlobClient = blobClient.getBlockBlobClient()

  core.debug(`BlobClient: ${JSON.stringify(blobClient)}`)
  core.debug(`blockBlobClient: ${JSON.stringify(blockBlobClient)}`)

  return blockBlobClient.downloadToFile(archivePath, 0, undefined, downloadOptions)
}