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

Data transfer capabilities for Strapi

{"version":3,"file":"utils.mjs","sources":["../../../../src/strapi/remote/handlers/utils.ts"],"sourcesContent":["import type { IncomingMessage } from 'node:http';\nimport { randomUUID } from 'crypto';\nimport type { Context } from 'koa';\nimport type { RawData, ServerOptions } from 'ws';\nimport { WebSocket, WebSocketServer } from 'ws';\n\nimport type { Handler, TransferState } from './abstract';\nimport type { Protocol } from '../../../../types';\nimport { ProviderError, ProviderTransferError } from '../../../errors/providers';\nimport { VALID_TRANSFER_COMMANDS, ValidTransferCommand } from './constants';\nimport { TransferMethod } from '../constants';\nimport { createDiagnosticReporter } from '../../../utils/diagnostic';\nimport { stringifyTransferWebSocketPayload } from '../../../utils/transfer-websocket-json';\n\ntype WSCallback = (client: WebSocket, request: IncomingMessage) => void;\n\nexport interface HandlerOptions {\n  verify: (ctx: Context, scope?: TransferMethod) => Promise<void>;\n  server?: ServerOptions;\n}\n\nexport const transformUpgradeHeader = (header = '') => {\n  return header.split(',').map((s) => s.trim().toLowerCase());\n};\n\nlet timeouts: Record<string, number> | undefined;\n\nconst hasHttpServer = () => {\n  // during server restarts, strapi may not have ever been defined at all, so we have to check it first\n  return typeof strapi !== 'undefined' && !!strapi?.server?.httpServer;\n};\n\n// temporarily disable server timeouts while transfer is running\nconst disableTimeouts = () => {\n  if (!hasHttpServer()) {\n    return;\n  }\n\n  const { httpServer } = strapi.server;\n\n  // save the original timeouts to restore after\n  if (!timeouts) {\n    timeouts = {\n      headersTimeout: httpServer.headersTimeout,\n      requestTimeout: httpServer.requestTimeout,\n    };\n  }\n\n  httpServer.headersTimeout = 0;\n  httpServer.requestTimeout = 0;\n\n  strapi.log.info('[Data transfer] Disabling http timeouts');\n};\nconst resetTimeouts = () => {\n  if (!hasHttpServer() || !timeouts) {\n    return;\n  }\n\n  const { httpServer } = strapi.server;\n\n  strapi.log.info('[Data transfer] Restoring http timeouts');\n  httpServer.headersTimeout = timeouts.headersTimeout;\n  httpServer.requestTimeout = timeouts.requestTimeout;\n};\n/**\n * Make sure that the upgrade header is a valid websocket one\n */\nexport const assertValidHeader = (ctx: Context) => {\n  // if it's exactly what we expect, it's fine\n  if (ctx.headers.upgrade === 'websocket') {\n    return;\n  }\n\n  // check if it could be an array that still includes websocket\n  const upgradeHeader = transformUpgradeHeader(ctx.headers.upgrade);\n\n  // Sanitize user input before writing it to our logs\n  const logSafeUpgradeHeader = JSON.stringify(ctx.headers.upgrade)\n    ?.replace(/[^a-z0-9\\s.,|]/gi, '')\n    .substring(0, 50);\n\n  if (!upgradeHeader.includes('websocket')) {\n    throw new Error(\n      `Transfer Upgrade header expected 'websocket', found '${logSafeUpgradeHeader}'. Please ensure that your server or proxy is not modifying the Upgrade header.`\n    );\n  }\n\n  /**\n   * If there's more than expected but it still includes websocket, in theory it could still work\n   * and could be necessary for their certain configurations, so we'll allow it to proceed but\n   * log the unexpected behaviour in case it helps debug an issue\n   * */\n  strapi.log.info(\n    `Transfer Upgrade header expected only 'websocket', found unexpected values: ${logSafeUpgradeHeader}`\n  );\n};\n\nexport const isDataTransferMessage = (message: unknown): message is Protocol.Client.Message => {\n  if (!message || typeof message !== 'object') {\n    return false;\n  }\n\n  const { uuid, type } = message as Record<string, unknown>;\n\n  if (typeof uuid !== 'string' || typeof type !== 'string') {\n    return false;\n  }\n\n  if (!['command', 'transfer'].includes(type)) {\n    return false;\n  }\n\n  return true;\n};\n\n/**\n * Handle the upgrade to ws connection\n */\nexport const handleWSUpgrade = (wss: WebSocketServer, ctx: Context, callback: WSCallback) => {\n  assertValidHeader(ctx);\n\n  wss.handleUpgrade(ctx.req, ctx.request.socket, Buffer.alloc(0), (client, request) => {\n    if (!client) {\n      // If the WebSocket upgrade failed, destroy the socket to avoid hanging\n      ctx.request.socket.destroy();\n      return;\n    }\n\n    disableTimeouts();\n    strapi.db.lifecycles.disable();\n    strapi.log.info('[Data transfer] Disabling lifecycle hooks');\n\n    // Create a connection between the client & the server\n    wss.emit('connection', client, ctx.req);\n\n    // Invoke the ws callback\n    callback(client, request);\n  });\n\n  ctx.respond = false;\n};\n\n// Protocol related functions\n\nexport const handlerControllerFactory =\n  <T extends Partial<Handler>>(implementation: (proto: Handler) => T) =>\n  (options: HandlerOptions) => {\n    const { verify, server: serverOptions } = options ?? {};\n\n    const wss = new WebSocket.Server({ ...serverOptions, noServer: true });\n\n    return async (ctx: Context) => {\n      const cb: WSCallback = (ws) => {\n        const state: TransferState = { id: undefined };\n        const messageUUIDs = new Set<string>();\n        const diagnostics = createDiagnosticReporter();\n\n        const cannotRespondHandler = (err: unknown) => {\n          strapi?.log?.error(\n            '[Data transfer] Cannot send error response to client, closing connection'\n          );\n          strapi?.log?.error(err);\n          try {\n            ws.terminate();\n            ctx.req.socket.destroy();\n          } catch (err) {\n            strapi?.log?.error('[Data transfer] Failed to close socket on error');\n          }\n        };\n\n        const prototype: Handler = {\n          // Transfer ID\n          get transferID() {\n            return state.id;\n          },\n\n          set transferID(id) {\n            state.id = id;\n          },\n\n          // Started at\n          get startedAt() {\n            return state.startedAt;\n          },\n\n          set startedAt(timestamp) {\n            state.startedAt = timestamp;\n          },\n\n          get response() {\n            return state.response;\n          },\n\n          set response(response) {\n            state.response = response;\n          },\n\n          get diagnostics() {\n            return diagnostics;\n          },\n\n          addUUID(uuid) {\n            messageUUIDs.add(uuid);\n          },\n\n          hasUUID(uuid) {\n            return messageUUIDs.has(uuid);\n          },\n\n          isTransferStarted() {\n            return this.transferID !== undefined && this.startedAt !== undefined;\n          },\n\n          assertValidTransfer() {\n            const isStarted = this.isTransferStarted();\n\n            if (!isStarted) {\n              throw new Error('Invalid Transfer Process');\n            }\n          },\n\n          assertValidTransferCommand(command: ValidTransferCommand) {\n            const isDefined = typeof this[command] === 'function';\n            const isValidTransferCommand = VALID_TRANSFER_COMMANDS.includes(command);\n\n            if (!isDefined || !isValidTransferCommand) {\n              throw new Error('Invalid transfer command');\n            }\n          },\n\n          async respond(uuid, e, data) {\n            let details = {};\n            return new Promise<void>((resolve, reject) => {\n              if (!uuid && !e) {\n                reject(new Error('Missing uuid for this message'));\n                return;\n              }\n\n              this.response = {\n                uuid,\n                data,\n                e,\n              };\n\n              if (e instanceof ProviderError) {\n                details = e.details;\n              }\n\n              const envelope: Record<string, unknown> = {\n                uuid,\n                data: data ?? null,\n                error: e\n                  ? {\n                      code: e?.name ?? 'ERR',\n                      message: e?.message,\n                      details,\n                    }\n                  : null,\n              };\n\n              const payload = stringifyTransferWebSocketPayload(envelope);\n\n              this.send(payload, (error) => (error ? reject(error) : resolve()));\n            });\n          },\n\n          send(message, cb) {\n            ws.send(message, cb);\n          },\n          confirm(message) {\n            return new Promise((resolve, reject) => {\n              const uuid = randomUUID();\n\n              const payload = stringifyTransferWebSocketPayload({ uuid, data: message });\n\n              this.send(payload, (error) => {\n                if (error) {\n                  reject(error);\n                }\n              });\n\n              const onResponse = (raw: RawData) => {\n                const response = JSON.parse(raw.toString());\n\n                if (response.uuid === uuid) {\n                  resolve(response.data ?? null);\n                } else {\n                  ws.once('message', onResponse);\n                }\n              };\n\n              ws.once('message', onResponse);\n            });\n          },\n\n          async executeAndRespond(uuid, fn) {\n            try {\n              const response = await fn();\n              await this.respond(uuid, null, response);\n            } catch (e) {\n              if (e instanceof Error) {\n                await this.respond(uuid, e).catch(cannotRespondHandler);\n              } else if (typeof e === 'string') {\n                await this.respond(uuid, new ProviderTransferError(e)).catch(cannotRespondHandler);\n              } else {\n                await this.respond(\n                  uuid,\n                  new ProviderTransferError('Unexpected error', {\n                    error: e,\n                  })\n                ).catch(cannotRespondHandler);\n              }\n            }\n          },\n\n          cleanup() {\n            this.transferID = undefined;\n            this.startedAt = undefined;\n            this.response = undefined;\n          },\n\n          teardown() {\n            this.cleanup();\n          },\n\n          verifyAuth(scope?: TransferMethod) {\n            return verify(ctx, scope);\n          },\n\n          // Transfer commands\n          init() {},\n          end() {},\n          status() {},\n\n          // Default prototype implementation for events\n          onMessage() {},\n          onError() {},\n          onClose() {},\n          onInfo() {},\n          onWarning() {},\n        };\n\n        const handler: Handler = Object.assign(Object.create(prototype), implementation(prototype));\n\n        // Bind ws events to handler methods\n        ws.on('close', async (...args) => {\n          try {\n            await handler.onClose(...args);\n          } catch (err) {\n            strapi?.log?.error('[Data transfer] Uncaught error closing connection');\n            strapi?.log?.error(err);\n            cannotRespondHandler(err);\n          } finally {\n            resetTimeouts();\n            strapi.db.lifecycles.enable();\n            strapi.log.info('[Data transfer] Restoring lifecycle hooks');\n          }\n        });\n        ws.on('error', async (...args) => {\n          try {\n            await handler.onError(...args);\n          } catch (err) {\n            strapi?.log?.error('[Data transfer] Uncaught error in error handling');\n            strapi?.log?.error(err);\n            cannotRespondHandler(err);\n          }\n        });\n        ws.on('message', async (...args) => {\n          try {\n            await handler.onMessage(...args);\n          } catch (err) {\n            strapi?.log?.error('[Data transfer] Uncaught error in message handling');\n            strapi?.log?.error(err);\n            cannotRespondHandler(err);\n          }\n        });\n\n        diagnostics.onDiagnostic((diagnostic) => {\n          const uuid = 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