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Merge pull request #56 from internxt/feat/network-download-v2
[_]: feat/network-download-v2
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| import { createDecipheriv, randomBytes } from 'crypto'; | ||
| import { PassThrough, Readable } from 'stream'; | ||
| import { pipeline } from 'stream/promises'; | ||
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| import { ALGORITHMS, DecryptFileFunction, DownloadFileFunction, Network } from '@internxt/sdk/dist/network'; | ||
| import { downloadFile, FileVersionOneError } from '@internxt/sdk/dist/network/download'; | ||
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| import { getStream } from '../../../services/request'; | ||
| import { GenerateFileKey, sha256 } from '../../utils/crypto'; | ||
| import { Events as ProgressEvents, HashStream, ProgressNotifier } from '../../utils/streams'; | ||
| import { DownloadProgressCallback } from '.'; | ||
| import { ActionState } from '../../../api'; | ||
| import { Events } from '..'; | ||
| import Errors from './errors'; | ||
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| export function downloadFileV2( | ||
| fileId: string, | ||
| bucketId: string, | ||
| mnemonic: string, | ||
| bridgeUrl: string, | ||
| creds: { pass: string, user: string }, | ||
| notifyProgress: DownloadProgressCallback, | ||
| actionState: ActionState, | ||
| onV2Confirmed: () => void | ||
| ): [Promise<void>, PassThrough] { | ||
| const abortController = new AbortController(); | ||
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| actionState.once(Events.Download.Abort, () => { | ||
| abortController.abort(); | ||
| }); | ||
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| const outStream = new PassThrough(); | ||
| const network = Network.client(bridgeUrl, { | ||
| clientName: 'inxt-js', | ||
| clientVersion: '1.0' | ||
| }, { | ||
| bridgeUser: creds.user, | ||
| userId: sha256(Buffer.from(creds.pass)).toString('hex') | ||
| }); | ||
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| const fileEncryptedSlices: { | ||
| stream: Readable, | ||
| hash: string | ||
| }[] = []; | ||
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| const downloadFileStep: DownloadFileFunction = async (downloadables) => { | ||
| onV2Confirmed(); | ||
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| for (const downloadable of downloadables.sort((dA, dB) => dA.index - dB.index)) { | ||
| fileEncryptedSlices.push({ | ||
| hash: downloadable.hash, | ||
| stream: await getStream(downloadable.url) | ||
| }); | ||
| } | ||
| }; | ||
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| const decryptFileStep: DecryptFileFunction = async (algorithm, key, iv, fileSize) => { | ||
| if (algorithm !== ALGORITHMS.AES256CTR.type) { | ||
| throw Errors.downloadUnknownAlgorithmError; | ||
| } | ||
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| const decipher = createDecipheriv('aes-256-ctr', key as Buffer, iv as Buffer); | ||
| const progress = new ProgressNotifier(fileSize, 2000, { emitClose: false }); | ||
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| progress.on(ProgressEvents.Progress, (progress: number) => { | ||
| notifyProgress(progress, null, null); | ||
| }); | ||
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| for (const fileEncryptedSlice of fileEncryptedSlices) { | ||
| const hasher = new HashStream(); | ||
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| await pipeline(fileEncryptedSlice.stream, hasher, decipher, progress, outStream, { | ||
| signal: abortController.signal | ||
| }); | ||
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| const calculatedHash = hasher.getHash().toString('hex'); | ||
| const expectedHash = fileEncryptedSlice.hash; | ||
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| if (calculatedHash !== expectedHash) { | ||
| throw Errors.downloadHashMismatchError; | ||
| } | ||
| } | ||
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| await new Promise((res) => progress.end(res)); | ||
| }; | ||
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| const downloadPromise = downloadFile( | ||
| fileId, | ||
| bucketId, | ||
| mnemonic, | ||
| network, | ||
| { | ||
| algorithm: ALGORITHMS.AES256CTR, | ||
| randomBytes, | ||
| generateFileKey: (mnemonic, bucketId, index) => { | ||
| return GenerateFileKey(mnemonic, bucketId, index as Buffer | string); | ||
| } | ||
| }, | ||
| Buffer.from, | ||
| downloadFileStep, | ||
| decryptFileStep | ||
| ).catch((err) => { | ||
| if (err instanceof FileVersionOneError) { | ||
| throw err; | ||
| } | ||
| outStream.emit('error', err); | ||
| }); | ||
|
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| return [downloadPromise, outStream]; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| /** | ||
| * DOWNLOAD ERROR CODES: 1XXX | ||
| * UPLOAD ERROR CODES: 2XXX | ||
| * CRYPTOGRAPHY ERROR CODES: 1/2 + 1XX | ||
| */ | ||
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| enum ErrorCodes { | ||
| DownloadHashMismatch = 1000, | ||
| DownloadUnknownAlgorithm = 1100, | ||
| } | ||
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| class CodeError extends Error { | ||
| constructor( | ||
| protected errorMessage: string, | ||
| protected errorCode: number | ||
| ) { | ||
| super(`${errorMessage} (ERRNO: ${errorCode})`); | ||
| } | ||
| } | ||
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| class DownloadError extends CodeError { | ||
| constructor(protected errorCode: number) { | ||
| super('Download failed', errorCode); | ||
| } | ||
| } | ||
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| export default { | ||
| ErrorCodes, | ||
| downloadHashMismatchError: new DownloadError(ErrorCodes.DownloadHashMismatch), | ||
| downloadUnknownAlgorithmError: new DownloadError(ErrorCodes.DownloadUnknownAlgorithm) | ||
| }; |
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