@strapi/data-transfer/dist/strapi/providers/remote-source/index.mjs.map

Data transfer capabilities for Strapi

{"version":3,"file":"index.mjs","sources":["../../../../src/strapi/providers/remote-source/index.ts"],"sourcesContent":["import { PassThrough, Readable, Writable } from 'stream';\nimport type { Struct, Utils } from '@strapi/types';\nimport { WebSocket } from 'ws';\nimport { castArray } from 'lodash/fp';\n\nimport type {\n  IAsset,\n  IMetadata,\n  ISourceProvider,\n  ISourceProviderTransferResults,\n  MaybePromise,\n  Protocol,\n  ProviderType,\n  TransferStage,\n} from '../../../../types';\nimport type { IDiagnosticReporter } from '../../../utils/diagnostic';\nimport { Client, Server, Auth } from '../../../../types/remote/protocol';\nimport { ProviderTransferError, ProviderValidationError } from '../../../errors/providers';\nimport { TRANSFER_PATH } from '../../remote/constants';\nimport { ILocalStrapiSourceProviderOptions } from '../local-source';\nimport { createDispatcher, connectToWebsocket, trimTrailingSlash } from '../utils';\n\nexport interface IRemoteStrapiSourceProviderOptions extends ILocalStrapiSourceProviderOptions {\n  url: URL; // the url of the remote Strapi admin\n  auth?: Auth.ITransferTokenAuth;\n  retryMessageOptions?: {\n    retryMessageTimeout: number; // milliseconds to wait for a response from a message\n    retryMessageMaxRetries: number; // max number of retries for a message before aborting transfer\n  };\n  streamTimeout?: number; // milliseconds to wait between chunks of an asset before aborting the transfer\n}\n\ntype QueueableAction = Protocol.Client.TransferAssetFlow &\n  ({ action: 'stream' } | { action: 'end' });\n\nclass RemoteStrapiSourceProvider implements ISourceProvider {\n  name = 'source::remote-strapi';\n\n  type: ProviderType = 'source';\n\n  options: IRemoteStrapiSourceProviderOptions;\n\n  ws: WebSocket | null;\n\n  dispatcher: ReturnType<typeof createDispatcher> | null;\n\n  defaultOptions: Partial<IRemoteStrapiSourceProviderOptions> = {\n    streamTimeout: 15000,\n  };\n\n  constructor(options: IRemoteStrapiSourceProviderOptions) {\n    this.options = {\n      ...this.defaultOptions,\n      ...options,\n    };\n\n    this.ws = null;\n    this.dispatcher = null;\n  }\n\n  results?: ISourceProviderTransferResults | undefined;\n\n  #diagnostics?: IDiagnosticReporter;\n\n  async #createStageReadStream(stage: Exclude<TransferStage, 'schemas'>) {\n    const startResult = await this.#startStep(stage);\n\n    if (startResult instanceof Error) {\n      throw startResult;\n    }\n\n    const { id: processID } = startResult as { id: string };\n\n    const stream = new PassThrough({ objectMode: true });\n\n    const listener = async (raw: Buffer) => {\n      const parsed = JSON.parse(raw.toString());\n      // If not a message related to our transfer process, ignore it\n      if (!parsed.uuid || parsed?.data?.type !== 'transfer' || parsed?.data?.id !== processID) {\n        this.ws?.once('message', listener);\n        return;\n      }\n\n      const { uuid, data: message } = parsed;\n      const { ended, error, data } = message;\n\n      if (error) {\n        await this.#respond(uuid);\n        stream.destroy(error);\n        return;\n      }\n\n      if (ended) {\n        await this.#respond(uuid);\n        await this.#endStep(stage);\n\n        stream.end();\n        return;\n      }\n\n      // if we get a single items instead of a batch\n      for (const item of castArray(data)) {\n        stream.push(item);\n      }\n\n      this.ws?.once('message', listener);\n\n      await this.#respond(uuid);\n    };\n\n    this.ws?.once('message', listener);\n\n    return stream;\n  }\n\n  createEntitiesReadStream(): MaybePromise<Readable> {\n    return this.#createStageReadStream('entities');\n  }\n\n  createLinksReadStream(): MaybePromise<Readable> {\n    return this.#createStageReadStream('links');\n  }\n\n  writeAsync = <T>(stream: Writable, data: T) => {\n    return new Promise<void>((resolve, reject) => {\n      stream.write(data, (error) => {\n        if (error) {\n          reject(error);\n        }\n\n        resolve();\n      });\n    });\n  };\n\n  async createAssetsReadStream(): Promise<Readable> {\n    // Create the streams used to transfer the assets\n    const stream = await this.#createStageReadStream('assets');\n    const pass = new PassThrough({ objectMode: true });\n\n    // Init the asset map\n    const assets: {\n      // TODO: could we include filename in this for improved logging?\n      [assetID: string]: IAsset & {\n        stream: PassThrough;\n        queue: Array<QueueableAction>;\n        status: 'ok' | 'closed' | 'errored';\n        timeout?: NodeJS.Timeout;\n      };\n    } = {};\n\n    // Watch for stalled assets; if we don't receive a chunk within timeout, abort transfer\n    const resetTimeout = (assetID: string) => {\n      if (assets[assetID].timeout) {\n        clearTimeout(assets[assetID].timeout);\n      }\n      assets[assetID].timeout = setTimeout(() => {\n        this.#reportInfo(`Asset ${assetID} transfer stalled, aborting.`);\n        assets[assetID].status = 'errored';\n        assets[assetID].stream.destroy(new Error(`Asset ${assetID} transfer timed out`));\n      }, this.options.streamTimeout);\n    };\n\n    stream\n      /**\n       * Process a payload of many transfer assets and performs the following tasks:\n       * - Start: creates a stream for new assets.\n       * - Stream: writes asset chunks to the asset's stream.\n       * - End: closes the stream after the asset s transferred and cleanup related resources.\n       */\n      .on('data', async (payload: Protocol.Client.TransferAssetFlow[]) => {\n        for (const item of payload) {\n          const { action, assetID } = item;\n\n          // Creates the stream to send the incoming asset through\n          if (action === 'start') {\n            // if a transfer has already been started for the same asset ID, something is wrong\n            if (assets[assetID]) {\n              throw new Error(`Asset ${assetID} already started`);\n            }\n\n            this.#reportInfo(`Asset ${assetID} starting`);\n            // Register the asset\n            assets[assetID] = {\n              ...item.data,\n              stream: new PassThrough(),\n              status: 'ok',\n              queue: [],\n            };\n\n            resetTimeout(assetID);\n\n            // Connect the individual asset stream to the main asset stage stream\n            // Note: nothing is transferred until data chunks are fed to the asset stream\n            await this.writeAsync(pass, assets[assetID]);\n          }\n\n          // Writes the asset's data chunks to their corresponding stream\n          // \"end\" is considered a chunk, but it's not a data chunk, it's a control message\n          // That is done so that we don't complicate the already complicated async processing of the queue\n          else if (action === 'stream' || action === 'end') {\n            // If the asset hasn't been registered, or if it's been closed already, something is wrong\n            if (!assets[assetID]) {\n              throw new Error(`No id matching ${assetID} for stream action`);\n            }\n\n            // On every action, reset the timeout timer\n            if (action === 'stream') {\n              resetTimeout(assetID);\n            } else {\n              clearTimeout(assets[assetID].timeout);\n            }\n\n            if (assets[assetID].status === 'closed') {\n              throw new Error(`Asset ${assetID} is closed`);\n            }\n\n            assets[assetID].queue.push(item);\n          }\n        }\n\n        // each new payload will start new processQueue calls, which may cause some extra calls\n        // it's essentially saying \"start processing this asset again, I added more data to the queue\"\n        for (const assetID in assets) {\n          if (Object.prototype.hasOwnProperty.call(assets, assetID)) {\n            const asset = assets[assetID];\n            if (asset.queue?.length > 0) {\n              await processQueue(assetID);\n            }\n          }\n        }\n      })\n      .on('close', () => {\n        pass.end();\n      });\n\n    /**\n     * Start processing the queue for a given assetID\n     *\n     * Even though this is a loop that attempts to process the entire queue, it is safe to call this more than once\n     * for the same asset id because the queue is shared globally, the items are shifted off, and immediately written\n     */\n    const processQueue = async (id: string) => {\n      if (!assets[id]) {\n        throw new Error(`Failed to write asset chunk for \"${id}\". Asset not found.`);\n      }\n\n      const asset = assets[id];\n      const { status: currentStatus } = asset;\n\n      if (['closed', 'errored'].includes(currentStatus)) {\n        throw new Error(\n          `Failed to write asset chunk for \"${id}\". The asset is currently \"${currentStatus}\"`\n        );\n      }\n\n      while (asset.queue.length > 0) {\n        const data = asset.queue.shift();\n\n        if (!data) {\n          throw new Error(`Invalid chunk found for ${id}`);\n        }\n\n        try {\n          // if this is an end chunk, close the asset stream\n          if (data.action === 'end') {\n            this.#reportInfo(`Ending asset stream for ${id}`);\n            await closeAssetStream(id);\n            break; // Exit the loop after closing the stream\n          }\n\n          // Save the current chunk\n          await writeChunkToStream(id, data);\n        } catch {\n          if (!assets[id]) {\n            throw new Error(`No id matching ${id} for writeAssetChunk`);\n          }\n        }\n      }\n    };\n\n    /**\n     * Writes a chunk of data to the asset's stream.\n     *\n     * Only check if the targeted asset exists, no other validation is done.\n     */\n    const writeChunkToStream = async (id: string, data: unknown) => {\n      const asset = assets[id];\n\n      if (!asset) {\n        throw new Error(`Failed to write asset chunk for \"${id}\". Asset not found.`);\n      }\n\n      const rawBuffer = data as { type: 'Buffer'; data: Uint8Array };\n      const chunk = Buffer.from(rawBuffer.data);\n\n      await this.writeAsync(asset.stream, chunk);\n    };\n\n    /**\n     * Closes the asset stream associated with the given ID.\n     *\n     * It deletes the stream for the asset upon successful closure.\n     */\n    const closeAssetStream = async (id: string) => {\n      if (!assets[id]) {\n        throw new Error(`Failed to close asset \"${id}\". Asset not found.`);\n      }\n\n      assets[id].status = 'closed';\n\n      await new Promise<void>((resolve, reject) => {\n        const { stream } = assets[id];\n\n        stream\n          .on('close', () => {\n            resolve();\n          })\n          .on('error', (e) => {\n            assets[id].status = 'errored';\n            reject(new Error(`Failed to close asset \"${id}\". Asset stream error: ${e.toString()}`));\n          })\n          .end();\n      });\n    };\n\n    return pass;\n  }\n\n  createConfigurationReadStream(): MaybePromise<Readable> {\n    return this.#createStageReadStream('configuration');\n  }\n\n  async getMetadata(): Promise<IMetadata | null> {\n    const metadata = await this.dispatcher?.dispatchTransferAction<IMetadata>('getMetadata');\n\n    return metadata ?? null;\n  }\n\n  assertValidProtocol(url: URL) {\n    const validProtocols = ['https:', 'http:'];\n\n    if (!validProtocols.includes(url.protocol)) {\n      throw new ProviderValidationError(`Invalid protocol \"${url.protocol}\"`, {\n        check: 'url',\n        details: {\n          protocol: url.protocol,\n          validProtocols,\n        },\n      });\n    }\n  }\n\n  async initTransfer(): Promise<string> {\n    const query = this.dispatcher?.dispatchCommand({\n      command: 'init',\n    });\n\n    const res = (await query) as Server.Payload<Server.InitMessage>;\n\n    if (!res?.transferID) {\n      throw new ProviderTransferError('Init failed, invalid response from the server');\n    }\n\n    return res.transferID;\n  }\n\n  #reportInfo(message: string) {\n    this.#diagnostics?.report({\n      details: {\n        createdAt: new Date(),\n        message,\n        origin: 'remote-source-provider',\n      },\n      kind: 'info',\n    });\n  }\n\n  async bootstrap(diagnostics?: IDiagnosticReporter): Promise<void> {\n    this.#diagnostics = diagnostics;\n    const { url, auth } = this.options;\n    let ws: WebSocket;\n    this.assertValidProtocol(url);\n    const wsProtocol = url.protocol === 'https:' ? 'wss:' : 'ws:';\n    const wsUrl = `${wsProtocol}//${url.host}${trimTrailingSlash(\n      url.pathname\n    )}${TRANSFER_PATH}/pull`;\n\n    this.#reportInfo('establishing websocket connection');\n    // No auth defined, trying public access for transfer\n    if (!auth) {\n      ws = await connectToWebsocket(wsUrl, undefined, this.#diagnostics);\n    }\n\n    // Common token auth, this should be the main auth method\n    else if (auth.type === 'token') {\n      const headers = { Authorization: `Bearer ${auth.token}` };\n      ws = await connectToWebsocket(wsUrl, { headers }, this.#diagnostics);\n    }\n\n    // Invalid auth method provided\n    else {\n      throw new ProviderValidationError('Auth method not available', {\n        check: 'auth.type',\n        details: {\n          auth: auth.type,\n        },\n      });\n    }\n\n    this.#reportInfo('established websocket connection');\n    this.ws = ws;\n    const { retryMessageOptions } = this.options;\n\n    this.#reportInfo('creating dispatcher');\n    this.dispatcher = createDispatcher(this.ws, retryMessageOptions, (message: string) =>\n      this.#reportInfo(message)\n    );\n    this.#reportInfo('creating dispatcher');\n\n    this.#reportInfo('initialize transfer');\n    const transferID = await this.initTransfer();\n    this.#reportInfo(`initialized transfer ${transferID}`);\n\n    this.dispatcher.setTransferProperties({ id: transferID, kind: 'pull' });\n    await this.dispatcher.dispatchTransferAction('bootstrap');\n  }\n\n  async close() {\n    await this.dispatcher?.dispatchTransferAction('close');\n\n    await new Promise<void>((resolve) => {\n      const { ws } = this;\n\n      if (!ws || ws.CLOSED) {\n        resolve();\n        return;\n      }\n\n      ws.on('close', () => resolve()).close();\n    });\n  }\n\n  async getSchemas() {\n    const schemas =\n      await this.dispatcher?.dispatchTransferAction<Utils.String.Dict<Struct.Schema>>('getSchemas');\n\n    return schemas ?? null;\n  }\n\n  async #startStep<T extends Client.TransferPullStep>(step: T) {\n    try {\n      return await this.dispatcher?.dispatchTransferStep({ action: 'start', step });\n    } catch (e) {\n      if (e instanceof Error) {\n        return e;\n      }\n\n      if (typeof e === 'string') {\n        return new ProviderTransferError(e);\n      }\n\n      return new ProviderTransferError('Unexpected error');\n    }\n  }\n\n  async #respond(uuid: string) {\n    return new Promise((resolve, reject) => {\n      this.ws?.send(JSON.stringify({ uuid }), (e) => {\n        if (e) {\n          reject(e);\n        } else {\n          resolve(e);\n        }\n      });\n    });\n  }\n\n  async #endStep<T extends Client.TransferPullStep>(step: T) {\n    try {\n      await this.dispatcher?.dispatchTransferStep({ action: 'end', step });\n    } catch (e) {\n      if (e instanceof Error) {\n        return e;\n      }\n\n      if (typeof e === 'string') {\n        return new ProviderTransferError(e);\n  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