@strapi/data-transfer/dist/strapi/remote/handlers/push.mjs.map

Data transfer capabilities for Strapi

{"version":3,"file":"push.mjs","sources":["../../../../src/strapi/remote/handlers/push.ts"],"sourcesContent":["import { randomUUID } from 'crypto';\nimport { Writable, PassThrough } from 'stream';\nimport type { Core } from '@strapi/types';\n\nimport type { TransferFlow, Step } from '../flows';\nimport type { TransferStage, IAsset, Protocol } from '../../../../types';\n\nimport { ProviderTransferError } from '../../../errors/providers';\nimport { createLocalStrapiDestinationProvider } from '../../providers';\nimport { createFlow, DEFAULT_TRANSFER_FLOW } from '../flows';\nimport { Handler } from './abstract';\nimport { handlerControllerFactory, isDataTransferMessage } from './utils';\n\nconst VALID_TRANSFER_ACTIONS = [\n  'bootstrap',\n  'close',\n  'rollback',\n  'beforeTransfer',\n  'getMetadata',\n  'getSchemas',\n] as const;\n\ntype PushTransferAction = (typeof VALID_TRANSFER_ACTIONS)[number];\n\nconst TRANSFER_KIND = 'push';\n\nexport interface PushHandler extends Handler {\n  /**\n   * Local Strapi Destination Provider used to write data to the current Strapi instance\n   */\n  provider?: ReturnType<typeof createLocalStrapiDestinationProvider>;\n\n  /**\n   * Holds all the stages' stream for the current transfer handler (one registry per connection)\n   */\n  streams?: { [stage in TransferStage]?: Writable };\n\n  stats: {\n    [stage in Exclude<TransferStage, 'schemas'>]: Protocol.Client.Stats;\n  };\n\n  /**\n   * Holds all the transferred assets for the current transfer handler (one registry per connection)\n   */\n  assets: { [filepath: string]: IAsset & { stream: PassThrough } };\n\n  /**\n   * Ochestrate and manage the transfer messages' ordering\n   */\n  flow?: TransferFlow;\n\n  /**\n   * Checks that the given action is a valid push transfer action\n   */\n  assertValidTransferAction(action: string): asserts action is PushTransferAction;\n\n  /**\n   * Create a new writable stream for the given step in the handler's stream registry\n   */\n  createWritableStreamForStep(step: TransferStage): Promise<void>;\n\n  /**\n   * Simple override of the auth verification\n   */\n  verifyAuth(): Promise<void>;\n\n  /**\n   * Callback when receiving a regular transfer message\n   */\n  onTransferMessage(msg: Protocol.Client.TransferMessage): Promise<unknown> | unknown;\n\n  /**\n   * Callback when receiving a transfer action message\n   */\n  onTransferAction(msg: Protocol.Client.Action): Promise<unknown> | unknown;\n\n  /**\n   * Callback when receiving a transfer step message\n   */\n  onTransferStep(msg: Protocol.Client.TransferPushMessage): Promise<unknown> | unknown;\n\n  /**\n   * Start streaming an asset\n   */\n  streamAsset(\n    this: PushHandler,\n    payload: Protocol.Client.GetTransferPushStreamData<'assets'>\n  ): Promise<void>;\n\n  // Transfer Flow\n\n  /**\n   * Try to move to a specific transfer stage & lock the step\n   */\n  lockTransferStep(stage: TransferStage): void;\n\n  /**\n   * Try to move to unlock the current step\n   */\n  unlockTransferStep(stage: TransferStage): void;\n\n  /**\n   * Checks whether it's possible to stream a chunk for the given stage\n   */\n  assertValidStreamTransferStep(stage: TransferStage): void;\n}\n\nconst 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\nexport const createPushController = handlerControllerFactory<Partial<PushHandler>>((proto) => ({\n  isTransferStarted(this: PushHandler) {\n    return proto.isTransferStarted.call(this) && this.provider !== undefined;\n  },\n\n  verifyAuth(this: PushHandler) {\n    return proto.verifyAuth.call(this, TRANSFER_KIND);\n  },\n  onInfo(message) {\n    this.diagnostics?.report({\n      details: {\n        message,\n        origin: 'push-handler',\n        createdAt: new Date(),\n      },\n      kind: 'info',\n    });\n  },\n  onWarning(message) {\n    this.diagnostics?.report({\n      details: {\n        message,\n        createdAt: new Date(),\n        origin: 'push-handler',\n      },\n      kind: 'warning',\n    });\n  },\n  cleanup(this: PushHandler) {\n    proto.cleanup.call(this);\n\n    this.streams = {};\n    this.assets = {};\n\n    delete this.flow;\n    delete this.provider;\n  },\n\n  teardown(this: PushHandler) {\n    if (this.provider) {\n      this.provider.rollback();\n    }\n\n    proto.teardown.call(this);\n  },\n\n  assertValidTransfer(this: PushHandler) {\n    proto.assertValidTransfer.call(this);\n\n    if (this.provider === undefined) {\n      throw new Error('Invalid Transfer Process');\n    }\n  },\n\n  assertValidTransferAction(this: PushHandler, action: PushTransferAction) {\n    if (VALID_TRANSFER_ACTIONS.includes(action)) {\n      return;\n    }\n\n    throw new ProviderTransferError(`Invalid action provided: \"${action}\"`, {\n      action,\n      validActions: Object.keys(VALID_TRANSFER_ACTIONS),\n    });\n  },\n\n  assertValidStreamTransferStep(this: PushHandler, stage) {\n    const currentStep = this.flow?.get();\n    const nextStep: Step = { kind: 'transfer', stage };\n\n    if (currentStep?.kind === 'transfer' && !currentStep.locked) {\n      throw new ProviderTransferError(\n        `You need to initialize the transfer stage (${nextStep}) before starting to stream data`\n      );\n    }\n\n    if (this.flow?.cannot(nextStep)) {\n      throw new ProviderTransferError(`Invalid stage (${nextStep}) provided for the current flow`, {\n        step: nextStep,\n      });\n    }\n  },\n\n  async createWritableStreamForStep(this: PushHandler, step: Exclude<TransferStage, 'schemas'>) {\n    const mapper = {\n      entities: () => this.provider?.createEntitiesWriteStream(),\n      links: () => this.provider?.createLinksWriteStream(),\n      configuration: () => this.provider?.createConfigurationWriteStream(),\n      assets: () => this.provider?.createAssetsWriteStream(),\n    };\n\n    if (!(step in mapper)) {\n      throw new Error('Invalid transfer step, impossible to create a stream');\n    }\n\n    if (!this.streams) {\n      throw new Error('Invalid transfer state');\n    }\n\n    this.streams[step] = await mapper[step]();\n  },\n\n  async onMessage(this: PushHandler, raw) {\n    const msg = JSON.parse(raw.toString());\n\n    if (!isDataTransferMessage(msg)) {\n      return;\n    }\n\n    if (!msg.uuid) {\n      await this.respond(undefined, new Error('Missing uuid in message'));\n    }\n\n    if (proto.hasUUID(msg.uuid)) {\n      const previousResponse = proto.response;\n      if (previousResponse?.uuid === msg.uuid) {\n        await this.respond(previousResponse?.uuid, previousResponse.e, previousResponse.data);\n      }\n      return;\n    }\n\n    const { uuid, type } = msg;\n    proto.addUUID(uuid);\n    // Regular command message (init, end, status)\n    if (type === 'command') {\n      const { command } = msg;\n      this.onInfo(`received command:${command} uuid:${uuid}`);\n      await this.executeAndRespond(uuid, () => {\n        this.assertValidTransferCommand(command);\n\n        // The status command don't have params\n        if (command === 'status') {\n          return this.status();\n        }\n        return this[command](msg.params);\n      });\n    }\n\n    // Transfer message (the transfer must be init first)\n    else if (type === 'transfer') {\n      this.onInfo(`received transfer action:${msg.action} step:${msg.kind} uuid:${uuid}`);\n      await this.executeAndRespond(uuid, async () => {\n        await this.verifyAuth();\n\n        this.assertValidTransfer();\n\n        return this.onTransferMessage(msg);\n      });\n    }\n\n    // Invalid messages\n    else {\n      await this.respond(uuid, new Error('Bad Request'));\n    }\n  },\n\n  async onTransferMessage(this: PushHandler, msg) {\n    const { kind } = msg;\n\n    if (kind === 'action') {\n      return this.onTransferAction(msg);\n    }\n\n    if (kind === 'step') {\n      return this.onTransferStep(msg as Protocol.Client.TransferPushMessage);\n    }\n  },\n\n  lockTransferStep(stage: TransferStage) {\n    const currentStep = this.flow?.get();\n    const nextStep: Step = { kind: 'transfer', stage };\n\n    if (currentStep?.kind === 'transfer' && currentStep.locked) {\n      throw new ProviderTransferError(\n        `It's not possible to start a new transfer stage (${stage}) while another one is in progress (${currentStep.stage})`\n      );\n    }\n\n    if (this.flow?.cannot(nextStep)) {\n      throw new ProviderTransferError(`Invalid stage (${stage}) provided for the current flow`, {\n        step: nextStep,\n      });\n    }\n\n    this.flow?.set({ ...nextStep, locked: true });\n  },\n\n  unlockTransferStep(stage: TransferStage) {\n    const currentStep = this.flow?.get();\n    const nextStep: Step = { kind: 'transfer', stage };\n\n    // Cannot unlock if not locked (aka: started)\n    if (currentStep?.kind === 'transfer' && !currentStep.locked) {\n      throw new ProviderTransferError(\n        `You need to initialize the transfer stage (${stage}) before ending it`\n      );\n    }\n\n    // Cannot unlock if invalid step provided\n    if (this.flow?.cannot(nextStep)) {\n      throw new ProviderTransferError(`Invalid stage (${stage}) provided for the current flow`, {\n        step: nextStep,\n      });\n    }\n\n    this.flow?.set({ ...nextStep, locked: false });\n  },\n\n  async onTransferStep(this: PushHandler, msg) {\n    const { step: stage } = msg;\n\n    if (msg.action === 'start') {\n      this.lockTransferStep(stage);\n\n      if (this.streams?.[stage] instanceof Writable) {\n        throw new Error('Stream already created, something went wrong');\n      }\n\n      await this.createWritableStreamForStep(stage);\n\n      this.stats[stage] = { started: 0, finished: 0 };\n\n      return { ok: true };\n    }\n\n    if (msg.action === 'stream') {\n      this.assertValidStreamTransferStep(stage);\n\n      // Stream operation on the current transfer stage\n      const stream = this.streams?.[stage];\n\n      if (!stream) {\n        throw new Error('You need to init first');\n      }\n\n      // Assets are nested streams\n      if (stage === 'assets') {\n        return this.streamAsset(msg.data);\n      }\n\n      // For all other steps\n      await Promise.all(\n        msg.data.map(async (item) => {\n          this.stats[stage].started += 1;\n          await writeAsync(stream, item);\n          this.stats[stage].finished += 1;\n        })\n      );\n    }\n\n    if (msg.action === 'end') {\n      this.unlockTransferStep(stage);\n      const stream = this.streams?.[stage];\n\n      if (stream && !stream.closed) {\n        await new Promise((resolve, reject) => {\n          stream.on('close', resolve).on('error', reject).end();\n        });\n      }\n\n      delete this.streams?.[stage];\n\n      return { ok: true, stats: this.stats[stage] };\n    }\n  },\n\n  async onTransferAction(this: PushHandler, msg) {\n    const { action } = msg;\n\n    this.assertValidTransferAction(action);\n\n    const step: Step = { kind: 'action', action };\n    const isStepRegistered = this.flow?.has(step);\n\n    if (isStepRegistered) {\n      if (this.flow?.cannot(step)) {\n        throw new ProviderTransferError(`Invalid action \"${action}\" found for the current flow `, {\n          action,\n        });\n      }\n\n      this.flow?.set(step);\n    }\n    if (action === 'bootstrap') {\n      return this.provider?.[action](this.diagnostics);\n    }\n    return this.provider?.[action]();\n  },\n\n  async streamAsset(this: PushHandler, payload) {\n    const assetsStream = this.streams?.assets;\n\n    // TODO: close the stream upon receiving an 'end' event instead\n    if (payload === null) {\n      this.streams?.assets?.end();\n      return;\n    }\n\n    for (const item of payload) {\n      const { action, assetID } = item;\n\n      if (!assetsStream) {\n        throw new Error('Stream not defined');\n      }\n\n      if (action === 'start') {\n        this.stats.assets.started += 1;\n        this.assets[assetID] = { ...item.data, stream: new PassThrough() };\n        writeAsync(assetsStream, this.assets[assetID]);\n      }\n\n      if (action === 'stream') {\n        // The buffer has gone through JSON operations and is now of shape { type: \"Buffer\"; data: UInt8Array }\n        // We need to transform it back into a Buffer instance\n        const rawBuffer = item.data as unknown as { type: 'Buffer'; data: Uint8Array };\n        const chunk = Buffer.from(rawBuffer.data);\n        await writeAsync(this.assets[assetID].stream, chunk);\n      }\n\n      if (action === 'end') {\n        await new Promise<void>((resolve, reject) => {\n          const { stream: assetStream } = this.assets[assetID];\n          assetStream\n            .on('close', () => {\n              this.stats.assets.finished += 1;\n              delete this.assets[assetID];\n              resolve();\n            })\n            .on('error', reject)\n            .end();\n        });\n      }\n    }\n  },\n\n  onClose(this: Handler) {\n    this.teardown();\n  },\n\n  onError(this: Handler, err) {\n    this.teardown();\n    strapi.log.error(err);\n  },\n\n  // Commands\n\n  async init(\n    this: PushHandler,\n    params: Protocol.Client.GetCommandParams<'init'>\n  ): Promise<Protocol.Server.Payload<Protocol.Server.InitMessage>> {\n    if (this.transferID || this.provider) {\n      throw new Error('Transfer already in progress');\n    }\n\n    await this.verifyAuth();\n\n    this.transferID = randomUUID();\n    this.startedAt = Date.now();\n\n    this.assets = {};\n    this.streams = {};\n    this.stats = {\n      assets: { started: 0, finished: 0 },\n      configuration: { started: 0, finished: 0 },\n      entities: { started: 0, finished: 0 },\n      links: { started: 0, finished: 0 },\n    };\n\n    this.flow = createFlow(DEFAULT_TRANSFER_FLOW);\n\n    this.provider = createLocalStrapiDestinationProvider({\n      ...params.options,\n      autoDestroy: false,\n      getStrapi: () => strapi as Core.Strapi,\n    });\n\n    this.provider.onWarning = (message) => {\n      this.onWarning(message);\n      strapi.log.warn(message);\n    };\n\n    return { transferID: this.transferID };\n  },\n\n  async status(this: PushHandler) {\n    const isStarted = this.isTransferStarted();\n\n    if (isStarted) {\n      const startedAt = this.startedAt as number;\n\n      return {\n        active: true,\n        kind: TRANSFER_KIND,\n        startedAt,\n        elapsed: Date.now() - startedAt,\n      };\n    }\n\n    return { active: false, kind: null, elapsed: null, startedAt: null };\n  },\n\n  async end(\n    this: PushHandler,\n    params: Protocol.Client.GetCommandParams<'end'>\n  ): Promise<Protocol.Server.Payload<Protocol.Server.EndMessage>> {\n    await this.verifyAuth();\n\n    if (this.transferID !== 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