@h4ad/serverless-adapter/lib/handlers/aws/index.cjs.map

Run REST APIs and other web applications using your existing Node.js application framework (NestJS, Express, Koa, Hapi, Fastify and many others), on top of AWS, Azure, Digital Ocean and many other clouds.

{"version":3,"sources":["../../../src/handlers/aws/index.ts","../../../src/handlers/aws/aws-stream.handler.ts","../../../src/network/request.ts","../../../src/network/response.ts","../../../src/network/utils.ts","../../../src/network/response-stream.ts","../../../src/core/base-handler.ts","../../../src/core/current-invoke.ts","../../../src/core/headers.ts","../../../src/core/no-op.ts","../../../src/core/logger.ts","../../../src/core/stream.ts"],"sourcesContent":["export * from './aws-stream.handler';\n","//#region Imports\n\nimport { Writable } from 'node:stream';\nimport { inspect } from 'node:util';\nimport type { APIGatewayProxyEventV2, Context } from 'aws-lambda';\nimport type { APIGatewayProxyStructuredResultV2 } from 'aws-lambda/trigger/api-gateway-proxy';\nimport type { BinarySettings } from '../../@types';\nimport type {\n  AdapterContract,\n  AdapterRequest,\n  FrameworkContract,\n  ResolverContract,\n  ServerlessHandler,\n} from '../../contracts';\nimport {\n  BaseHandler,\n  type ILogger,\n  getFlattenedHeadersMap,\n  setCurrentInvoke,\n  waitForStreamComplete,\n} from '../../core';\nimport { ServerlessRequest, ServerlessStreamResponse } from '../../network';\n\n//#endregion\n\n/**\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\nexport type AWSResponseStream = Writable;\n\n/**\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\nexport type AWSStreamResponseMetadata = Pick<\n  APIGatewayProxyStructuredResultV2,\n  'statusCode' | 'headers' | 'cookies'\n>;\n\n/**\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\ndeclare const awslambda: {\n  streamifyResponse: (\n    handler: (\n      event: APIGatewayProxyEventV2,\n      response: AWSResponseStream,\n      context: Context,\n    ) => Promise<void>,\n  ) => any;\n  HttpResponseStream: {\n    from: (\n      stream: AWSResponseStream,\n      httpResponseMetadata: AWSStreamResponseMetadata,\n    ) => AWSResponseStream;\n  };\n};\n\n/**\n * The interface that customizes the {@link AwsStreamHandler}\n *\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\nexport type AwsStreamHandlerOptions = {\n  /**\n   * Set the value of the property `callbackWaitsForEmptyEventLoop`, you can set to `false` to fix issues with long execution due to not cleaning the event loop ([ref](https://github.com/H4ad/serverless-adapter/issues/264)).\n   * In the next release, this value will be changed to `false`.\n   *\n   * @defaultValue undefined\n   */\n  callbackWaitsForEmptyEventLoop?: boolean;\n};\n\n/**\n * The interface that describes the internal context used by the {@link AwsStreamHandler}\n *\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\nexport type AWSStreamContext = {\n  /**\n   * The response stream provided by the serverless\n   */\n  response: AWSResponseStream;\n  /**\n   * The context provided by the serverless\n   */\n  context: Context;\n};\n\n/**\n * The class that implements a default serverless handler consisting of a function with event, context and callback parameters respectively\n *\n * @breadcrumb Handlers / AwsStreamHandler\n * @public\n */\nexport class AwsStreamHandler<TApp> extends BaseHandler<\n  TApp,\n  APIGatewayProxyEventV2,\n  AWSStreamContext,\n  void,\n  AWSStreamResponseMetadata,\n  void\n> {\n  //#region Constructor\n\n  /**\n   * Construtor padrão\n   */\n  constructor(private readonly options?: AwsStreamHandlerOptions) {\n    super();\n  }\n\n  //#endregion\n\n  //#region Public Methods\n\n  /**\n   * {@inheritDoc}\n   */\n  public getHandler(\n    app: TApp,\n    framework: FrameworkContract<TApp>,\n    adapters: AdapterContract<\n      APIGatewayProxyEventV2,\n      AWSStreamContext,\n      AWSStreamResponseMetadata\n    >[],\n    _resolverFactory: ResolverContract<\n      unknown,\n      unknown,\n      unknown,\n      unknown,\n      unknown\n    >,\n    binarySettings: BinarySettings,\n    respondWithErrors: boolean,\n    log: ILogger,\n  ): ServerlessHandler<Promise<void>> {\n    return awslambda.streamifyResponse(async (event, response, context) => {\n      if (this.options?.callbackWaitsForEmptyEventLoop !== undefined) {\n        // TODO(h4ad): Set the following property to false by default\n        context.callbackWaitsForEmptyEventLoop =\n          this.options.callbackWaitsForEmptyEventLoop;\n      }\n\n      const streamContext = { response, context };\n\n      this.onReceiveRequest(\n        log,\n        event,\n        streamContext,\n        binarySettings,\n        respondWithErrors,\n      );\n\n      const adapter = this.getAdapterByEventAndContext(\n        event,\n        streamContext,\n        adapters,\n        log,\n      );\n\n      this.onResolveAdapter(log, adapter);\n\n      setCurrentInvoke({ event, context });\n\n      await this.forwardRequestToFramework(\n        app,\n        framework,\n        event,\n        streamContext,\n        adapter,\n        binarySettings,\n        log,\n      );\n    });\n  }\n\n  //#endregion\n\n  //#region Hooks\n\n  /**\n   * The hook executed on receive a request, before the request is being processed\n   *\n   * @param log - The instance of logger\n   * @param event - The event sent by serverless\n   * @param context - The context sent by serverless\n   * @param binarySettings - The binary settings\n   * @param respondWithErrors - Indicates whether the error stack should be included in the response or not\n   */\n  protected onReceiveRequest(\n    log: ILogger,\n    event: APIGatewayProxyEventV2,\n    context: AWSStreamContext,\n    binarySettings: BinarySettings,\n    respondWithErrors: boolean,\n  ): void {\n    log.debug('SERVERLESS_ADAPTER:PROXY', () => ({\n      event,\n      context: inspect(context, { depth: null }),\n      binarySettings,\n      respondWithErrors,\n    }));\n  }\n\n  /**\n   * The hook executed after resolve the adapter that will be used to handle the request and response\n   *\n   * @param log - The instance of logger\n   * @param adapter - The adapter resolved\n   */\n  protected onResolveAdapter(\n    log: ILogger,\n    adapter: AdapterContract<\n      APIGatewayProxyEventV2,\n      AWSStreamContext,\n      AWSStreamResponseMetadata\n    >,\n  ): void {\n    log.debug(\n      'SERVERLESS_ADAPTER:RESOLVED_ADAPTER_NAME: ',\n      adapter.getAdapterName(),\n    );\n  }\n\n  /**\n   * The hook executed after resolves the request values that will be sent to the framework\n   *\n   * @param log - The instance of logger\n   * @param requestValues - The request values returned by the adapter\n   */\n  protected onResolveRequestValues(\n    log: ILogger,\n    requestValues: AdapterRequest,\n  ): void {\n    log.debug(\n      'SERVERLESS_ADAPTER:FORWARD_REQUEST_TO_FRAMEWORK:REQUEST_VALUES',\n      () => ({\n        requestValues: {\n          ...requestValues,\n          body: requestValues.body?.toString(),\n        },\n      }),\n    );\n  }\n\n  /**\n   * The hook executed before sending response to the serverless with response from adapter\n   *\n   * @param log - The instance of logger\n   * @param successResponse - The success response resolved by the adapter\n   */\n  protected onForwardResponseAdapterResponse(\n    log: ILogger,\n    successResponse: AWSStreamResponseMetadata,\n  ) {\n    log.debug('SERVERLESS_ADAPTER:FORWARD_RESPONSE:EVENT_SOURCE_RESPONSE', {\n      successResponse,\n    });\n  }\n\n  //#endregion\n\n  //#region Protected Methods\n\n  /**\n   * The function to forward the event to the framework\n   *\n   * @param app - The instance of the app (express, hapi, etc...)\n   * @param framework - The framework that will process requests\n   * @param event - The event sent by serverless\n   * @param context - The context sent by serverless\n   * @param adapter - The adapter resolved to this event\n   * @param _binarySettings - The binary settings\n   * @param log - The instance of logger\n   */\n  protected async forwardRequestToFramework(\n    app: TApp,\n    framework: FrameworkContract<TApp>,\n    event: APIGatewayProxyEventV2,\n    context: AWSStreamContext,\n    adapter: AdapterContract<\n      APIGatewayProxyEventV2,\n      AWSStreamContext,\n      AWSStreamResponseMetadata\n    >,\n    _binarySettings: BinarySettings,\n    log: ILogger,\n  ): Promise<void> {\n    const requestValues = adapter.getRequest(event, context, log);\n\n    this.onResolveRequestValues(log, requestValues);\n\n    const request = new ServerlessRequest({\n      method: requestValues.method,\n      headers: requestValues.headers,\n      body: requestValues.body,\n      remoteAddress: requestValues.remoteAddress,\n      url: requestValues.path,\n    });\n\n    const response = new ServerlessStreamResponse({\n      method: requestValues.method,\n      onReceiveHeaders: (status, headers) => {\n        const flattenedHeaders = getFlattenedHeadersMap(headers);\n        const awsMetadata: AWSStreamResponseMetadata = {\n          statusCode: status,\n          headers: flattenedHeaders,\n        };\n\n        const cookies = headers['set-cookie'];\n\n        if (cookies) {\n          awsMetadata.cookies = Array.isArray(cookies) ? cookies : [cookies];\n\n          delete headers['set-cookie'];\n          delete flattenedHeaders['set-cookie'];\n        }\n\n        this.onForwardResponseAdapterResponse(log, awsMetadata);\n\n        const finalResponse = awslambda.HttpResponseStream.from(\n          context.response,\n          awsMetadata,\n        );\n\n        // We must call write with an empty string to trigger the awsMetadata to be sent\n        // https://github.com/aws/aws-lambda-nodejs-runtime-interface-client/blob/2ce88619fd176a5823bc5f38c5484d1cbdf95717/src/HttpResponseStream.js#L22\n        finalResponse.write('');\n\n        return finalResponse;\n      },\n      log,\n    });\n\n    framework.sendRequest(app, request, response);\n\n    log.debug(\n      'SERVERLESS_ADAPTER:FORWARD_REQUEST_TO_FRAMEWORK:WAITING_STREAM_COMPLETE',\n    );\n    await waitForStreamComplete(response);\n\n    log.debug(\n      'SERVERLESS_ADAPTER:FORWARD_REQUEST_TO_FRAMEWORK:STREAM_COMPLETE',\n    );\n    context.response.end();\n  }\n\n  //#endregion\n}\n","// ATTRIBUTION: https://github.com/dougmoscrop/serverless-http\nimport { IncomingMessage } from 'node:http';\nimport type { AddressInfo } from 'node:net';\nimport type { SingleValueHeaders } from '../@types';\nimport { NO_OP } from '../core';\n\nconst HTTPS_PORT = 443;\n\n/**\n * The properties to create a {@link ServerlessRequest}\n *\n * @breadcrumb Network / ServerlessRequest\n * @public\n */\nexport interface ServerlessRequestProps {\n  /**\n   * The HTTP Method of the request\n   */\n  method: string;\n\n  /**\n   * The URL requested\n   */\n  url: string;\n\n  /**\n   * The headers from the event source\n   */\n  headers: SingleValueHeaders;\n\n  /**\n   * The body from the event source\n   */\n  body?: Buffer | Uint8Array;\n\n  /**\n   * The IP Address from caller\n   */\n  remoteAddress?: string;\n}\n\n/**\n * The class that represents an {@link http#IncomingMessage} created by the library to represent an actual request to the framework.\n *\n * @breadcrumb Network / ServerlessRequest\n * @public\n */\nexport class ServerlessRequest extends IncomingMessage {\n  constructor({\n    method,\n    url,\n    headers,\n    body,\n    remoteAddress,\n  }: ServerlessRequestProps) {\n    super({\n      encrypted: true,\n      readable: true, // credits to @pnkp at https://github.com/CodeGenieApp/serverless-express/pull/692\n      remoteAddress,\n      address: () => ({ port: HTTPS_PORT }) as AddressInfo,\n      on: NO_OP,\n      removeListener: NO_OP,\n      removeEventListener: NO_OP,\n      end: NO_OP,\n      destroy: NO_OP,\n    } as any);\n\n    this.statusCode = 200;\n    this.statusMessage = 'OK';\n    this.complete = true;\n    this.httpVersion = '1.1';\n    this.httpVersionMajor = 1;\n    this.httpVersionMinor = 1;\n    this.method = method;\n    this.headers = headers;\n    this.body = body;\n    this.url = url;\n    this.ip = remoteAddress;\n\n    this._read = () => {\n      this.push(body);\n      this.push(null);\n    };\n  }\n\n  ip?: string;\n  body?: Buffer | Uint8Array;\n}\n","// ATTRIBUTION: https://github.com/dougmoscrop/serverless-http\nimport { IncomingMessage, ServerResponse } from 'node:http';\nimport type { Socket } from 'node:net';\nimport { NO_OP } from '../core';\nimport { getString } from './utils';\n\nconst headerEnd = '\\r\\n\\r\\n';\nconst endChunked = '0\\r\\n\\r\\n';\n\nconst BODY = Symbol('Response body');\nconst HEADERS = Symbol('Response headers');\n\nfunction addData(stream: ServerlessResponse, data: Uint8Array | string) {\n  if (\n    Buffer.isBuffer(data) ||\n    typeof data === 'string' ||\n    data instanceof Uint8Array\n  )\n    stream[BODY].push(Buffer.from(data));\n  else throw new Error(`response.write() of unexpected type: ${typeof data}`);\n}\n\n/**\n * The properties to create a {@link ServerlessResponse}.\n *\n * @breadcrumb Network / ServerlessResponse\n * @public\n */\nexport interface ServerlessResponseProps {\n  /**\n   * The HTTP Method from request\n   */\n  method?: string;\n}\n\n/**\n * The class that represents a response instance used to send to the framework and wait until the framework finishes processing the request.\n * Once it's happens, we use the properties from this response to built the response to the cloud.\n *\n * @breadcrumb Network / ServerlessResponse\n * @public\n */\nexport class ServerlessResponse extends ServerResponse {\n  constructor({ method }: ServerlessResponseProps) {\n    super({ method } as any);\n\n    this[BODY] = [];\n    this[HEADERS] = {};\n\n    this.useChunkedEncodingByDefault = false;\n    this.chunkedEncoding = false;\n    this._header = '';\n\n    // this ignore is used because I need to ignore these write calls:\n    // https://github.com/nodejs/node/blob/main/lib/_http_outgoing.js#L934-L935\n    // https://github.com/nodejs/node/blob/main/lib/_http_outgoing.js#L937\n    let writesToIgnore = 1;\n\n    const socket: Partial<Socket> & { _writableState: any } = {\n      _writableState: {},\n      writable: true,\n      on: NO_OP,\n      removeListener: NO_OP,\n      destroy: NO_OP,\n      cork: NO_OP,\n      uncork: NO_OP,\n      write: (\n        data: Uint8Array | string,\n        encoding?: string | null | (() => void),\n        cb?: () => void,\n      ): any => {\n        if (typeof encoding === 'function') {\n          cb = encoding;\n          encoding = null;\n        }\n\n        if (this._header === '' || this._wroteHeader) {\n          if (!this.chunkedEncoding) addData(this, data);\n          else {\n            if (writesToIgnore > 0) writesToIgnore--;\n            else if (data !== endChunked) {\n              addData(this, data);\n              writesToIgnore = 3;\n            }\n          }\n        } else {\n          const string = getString(data);\n          const index = string.indexOf(headerEnd);\n\n          if (index !== -1) {\n            const remainder = string.slice(index + headerEnd.length);\n\n            if (remainder && !this.chunkedEncoding) addData(this, remainder);\n\n            this._wroteHeader = true;\n          }\n        }\n\n        if (typeof cb === 'function') cb();\n      },\n    };\n\n    this.assignSocket(socket as unknown as Socket);\n  }\n\n  _header: string;\n  _headers?: Record<any, any>;\n  _wroteHeader?: boolean;\n\n  [BODY]: any[];\n  [HEADERS]: Record<any, any>;\n\n  get headers(): Record<any, any> {\n    return this[HEADERS];\n  }\n\n  static from(res: IncomingMessage) {\n    const response = new ServerlessResponse({ method: res.method });\n\n    response.statusCode = res.statusCode || 0;\n    response[HEADERS] = res.headers;\n    response[BODY] = (res as any).body ? [Buffer.from((res as any).body)] : [];\n    response.end();\n\n    return response;\n  }\n\n  static body(res: ServerlessResponse): Buffer {\n    return Buffer.concat(res[BODY]);\n  }\n\n  static headers(res: ServerlessResponse) {\n    const headers = res.getHeaders();\n\n    return Object.assign(headers, res[HEADERS]);\n  }\n\n  override setHeader(\n    key: string,\n    value: number | string | readonly string[],\n  ): any {\n    if (this._wroteHeader) this[HEADERS][key] = value;\n    else super.setHeader(key, value);\n  }\n\n  override writeHead(\n    statusCode: number,\n    statusMessage?: string | any | any[],\n    obj?: any | any[],\n  ): any {\n    const headersObjOrArray =\n      typeof statusMessage === 'string' ? obj : statusMessage;\n\n    const arrayHeaders = Array.isArray(headersObjOrArray)\n      ? headersObjOrArray\n      : [headersObjOrArray || {}];\n\n    for (const headers of arrayHeaders) {\n      for (const name in headers) {\n        this.setHeader(name, headers[name]!);\n\n        if (!this._wroteHeader) {\n          // we only need to initiate super.headers once\n          // writeHead will add the other headers itself\n          break;\n        }\n      }\n    }\n\n    return this.callNativeWriteHead(statusCode, statusMessage, obj);\n  }\n\n  /**\n   * I use ignore here because in nodejs 12.x, statusMessage can be string | OutgoingHttpHeaders\n   * But in nodejs \\>=14.x, statusMessage can also be OutgoingHttpHeaders[]\n   * I take care of these cases above, but here I can't handle it well, so I give up\n   * nodejs 12.x ref: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/node/v12/http.d.ts#L229\n   * nodejs 14.x ref: https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/node/v14/http.d.ts#L263\n   */\n  protected callNativeWriteHead(\n    statusCode: number,\n    statusMessage?: string | any | any[],\n    obj?: any | any[],\n  ): this {\n    return super.writeHead(statusCode, statusMessage, obj);\n  }\n}\n","/**\n * Get the data from a buffer, string, or Uint8Array\n *\n * @breadcrumb Network\n * @param data - The data that was written inside the stream\n */\nexport function getString(data: Buffer | string | unknown) {\n  if (Buffer.isBuffer(data)) return data.toString('utf8');\n  else if (typeof data === 'string') return data;\n  else if (data instanceof Uint8Array) return new TextDecoder().decode(data);\n  else throw new Error(`response.write() of unexpected type: ${typeof data}`);\n}\n","import { ServerResponse } from 'node:http';\nimport type { Socket } from 'node:net';\nimport type { Writable } from 'node:stream';\nimport type { BothValueHeaders } from '../@types';\nimport { type ILogger, NO_OP, parseHeaders } from '../core';\nimport { getString } from './utils';\n\n// header or data crlf\nconst crlfBuffer = Buffer.from('\\r\\n');\n\nconst endChunked = '0\\r\\n\\r\\n';\nconst headerEnd = '\\r\\n\\r\\n';\nconst endStatusSeparator = '\\r\\n';\n\n/**\n * The properties to create a {@link ServerlessStreamResponse}.\n *\n * @breadcrumb Network / ServerlessStreamResponse\n * @public\n */\nexport interface ServerlessStreamResponseProps {\n  /**\n   * The HTTP Method from request\n   */\n  method?: string;\n\n  /**\n   * The callback to receive the headers when they are written to the stream\n   * You need to return a writable stream be able to continue writing the response\n   *\n   * @param statusCode - The status code of the response\n   * @param headers - The headers of the response\n   */\n  onReceiveHeaders: (statusCode: number, headers: BothValueHeaders) => Writable;\n\n  /**\n   * Instance of the logger\n   */\n  log: ILogger;\n}\n\n/**\n * The class that represents a response instance used to send to the framework and wait until the framework finishes processing the request.\n * This response is specially built to deal with transfer-encoding: chunked\n *\n * @breadcrumb Network / ServerlessStreamResponse\n * @public\n */\nexport class ServerlessStreamResponse extends ServerResponse {\n  constructor({\n    method,\n    onReceiveHeaders,\n    log,\n  }: ServerlessStreamResponseProps) {\n    super({ method } as any);\n\n    this.useChunkedEncodingByDefault = true;\n    this.chunkedEncoding = true;\n\n    let internalWritable: Writable | null = null;\n    let firstCrlfBufferEncountered = false;\n    let chunkEncountered = false;\n\n    const socket: Partial<Socket> & { _writableState: any } = {\n      _writableState: {},\n      writable: true,\n      on: NO_OP,\n      removeListener: NO_OP,\n      destroy: NO_OP,\n      cork: NO_OP,\n      uncork: NO_OP,\n      write: (\n        data: Uint8Array | string,\n        encoding?: string | null | (() => void),\n        cb?: () => void,\n      ): any => {\n        // very unlikely, I don't even know how to reproduce this, but exist on types\n        // istanbul ignore if\n        if (typeof encoding === 'function') {\n          cb = encoding;\n          encoding = null;\n        }\n\n        log.debug('SERVERLESS_ADAPTER:RESPONSE_STREAM:DATA', () => ({\n          data: Buffer.isBuffer(data) ? data.toString('utf8') : data,\n          encoding,\n        }));\n\n        if (!internalWritable) {\n          const stringData = getString(data);\n          const endStatusIndex = stringData.indexOf(endStatusSeparator);\n          const status = +stringData.slice(0, endStatusIndex).split(' ')[1];\n          const endHeaderIndex = stringData.indexOf(headerEnd);\n\n          const headerData = stringData.slice(\n            endStatusIndex + 2,\n            endHeaderIndex,\n          );\n          const headers = parseHeaders(headerData);\n          log.debug(\n            'SERVERLESS_ADAPTER:RESPONSE_STREAM:FRAMEWORK_HEADERS',\n            () => ({\n              headers,\n            }),\n          );\n\n          internalWritable = onReceiveHeaders(status, headers);\n\n          // If we get an endChunked right after header which means the response body is empty, we need to immediately end the writable\n          if (stringData.substring(endHeaderIndex + 4) === endChunked)\n            internalWritable.end();\n\n          return true;\n        }\n\n        // node sends the last chunk crlf as a string:\n        // https://github.com/nodejs/node/blob/v22.8.0/lib/_http_outgoing.js#L1131\n        if (data === endChunked) {\n          internalWritable.end(cb);\n          return true;\n        }\n\n        // check for header or data crlf\n        // node sends the header and data crlf as a buffer\n        // below code is aligned to following node implementation of the HTTP/1.1 chunked transfer coding:\n        // https://github.com/nodejs/node/blob/v22.8.0/lib/_http_outgoing.js#L1012-L1015\n        // for reference: https://datatracker.ietf.org/doc/html/rfc9112#section-7\n        if (Buffer.isBuffer(data) && crlfBuffer.equals(data)) {\n          const isHeaderCrlf = !firstCrlfBufferEncountered;\n          if (isHeaderCrlf) {\n            firstCrlfBufferEncountered = true;\n            return true;\n          }\n\n          const isDataCrlf = firstCrlfBufferEncountered && chunkEncountered;\n          if (isDataCrlf) {\n            // done with chunk\n            firstCrlfBufferEncountered = false;\n            chunkEncountered = false;\n            return true;\n          }\n\n          // the crlf *is* the chunk\n        }\n\n        const isContentLength = !firstCrlfBufferEncountered;\n        if (isContentLength) {\n          // discard content length\n          return true;\n        }\n\n        // write chunk\n        chunkEncountered = true;\n        internalWritable.write(data, cb);\n        return true;\n      },\n    };\n\n    this.assignSocket(socket as unknown as Socket);\n  }\n}\n","//#region Imports\n\nimport type { BinarySettings } from '../@types';\nimport type {\n  AdapterContract,\n  AdapterRequest,\n  FrameworkContract,\n  HandlerContract,\n  ResolverContract,\n  ServerlessHandler,\n} from '../contracts';\nimport { ServerlessRequest, ServerlessResponse } from '../network';\nimport type { ILogger } from './index';\n\n//#endregion\n\n/**\n * The abstract class that represents the base class for a handler\n *\n * @breadcrumb Core\n * @public\n */\nexport abstract class BaseHandler<\n  TApp,\n  TEvent,\n  TContext,\n  TCallback,\n  TResponse,\n  TReturn,\n> implements\n    HandlerContract<TApp, TEvent, TContext, TCallback, TResponse, TReturn>\n{\n  //#region Public Methods\n\n  /**\n   * Get the handler that will handle serverless requests\n   */\n  public abstract getHandler(\n    app: TApp,\n    framework: FrameworkContract<TApp>,\n    adapters: AdapterContract<TEvent, TContext, TResponse>[],\n    resolverFactory: ResolverContract<\n      TEvent,\n      TContext,\n      TCallback,\n      TResponse,\n      TReturn\n    >,\n    binarySettings: BinarySettings,\n    respondWithErrors: boolean,\n    log: ILogger,\n  ): ServerlessHandler<TReturn>;\n\n  //#endregion\n\n  //#region Protected Methods\n\n  /**\n   * Get the adapter to handle a specific event and context\n   *\n   * @param event - The event sent by serverless\n   * @param context - The context sent by serverless\n   * @param adapters - The list of adapters\n   * @param log - The instance of logger\n   */\n  protected getAdapterByEventAndContext(\n    event: TEvent,\n    context: TContext,\n    adapters: AdapterContract<TEvent, TContext, TResponse>[],\n    log: ILogger,\n  ): AdapterContract<TEvent, TContext, TResponse> {\n    const resolvedAdapters = adapters.filter(adapter =>\n      adapter.canHandle(event, context, log),\n    );\n\n    if (resolvedAdapters.length === 0) {\n      throw new Error(\n        \"SERVERLESS_ADAPTER: Couldn't find adapter to handle this event.\",\n      );\n    }\n\n    if (resolvedAdapters.length > 1) {\n      throw new Error(\n        `SERVERLESS_ADAPTER: Two or more adapters was resolved by the event, the adapters are: ${adapters\n          .map(adapter => adapter.getAdapterName())\n          .join(', ')}.`,\n      );\n    }\n\n    return resolvedAdapters[0];\n  }\n\n  /**\n   * Get serverless request and response frmo the adapter request\n   *\n   * @param requestValues - The request values from adapter\n   */\n  protected getServerlessRequestResponseFromAdapterRequest(\n    requestValues: AdapterRequest,\n  ): [request: ServerlessRequest, response: ServerlessResponse] {\n    const request = new ServerlessRequest({\n      method: requestValues.method,\n      headers: requestValues.headers,\n      body: requestValues.body,\n      remoteAddress: requestValues.remoteAddress,\n      url: requestValues.path,\n    });\n\n    const response = new ServerlessResponse({\n      method: requestValues.method,\n    });\n\n    return [request, response];\n  }\n\n  //#endregion\n}\n","/**\n * The type that represents the object that handles the references to the event created by the serverless trigger or context created by the serverless environment.\n *\n * @breadcrumb Core / Current Invoke\n * @public\n */\nexport type CurrentInvoke<TEvent, TContext> = {\n  /**\n   * The event created by the serverless trigger\n   *\n   * @remarks It's only null when you call {@link getCurrentInvoke} outside this library's pipeline.\n   */\n  event: TEvent | null;\n\n  /**\n   * The context created by the serverless environment\n   *\n   * @remarks It's only null when you call {@link getCurrentInvoke} outside this library's pipeline.\n   */\n  context: TContext | null;\n};\n\nconst currentInvoke: CurrentInvoke<any, any> = {\n  context: null,\n  event: null,\n};\n\n/**\n * Get the reference to the event created by the serverless trigger or context created by the serverless environment.\n *\n * @example\n * ```typescript\n * import type { ALBEvent, Context } from 'aws-lambda';\n *\n * // inside the method that handles the aws alb request.\n * const { event, context } = getCurrentInvoke<ALBEvent, Context>();\n * ```\n *\n * @breadcrumb Core / Current Invoke\n * @public\n */\nexport function getCurrentInvoke<TEvent = any, TContext = any>(): CurrentInvoke<\n  TEvent,\n  TContext\n> {\n  return currentInvoke;\n}\n\n/**\n * Method that saves to the event created by the serverless trigger or context created by the serverless environment.\n *\n * @remarks This method MUST NOT be called by you, this method MUST only be used internally in this library.\n *\n * @param event - The event created by the serverless trigger\n * @param context - The context created by the serverless environment\n *\n * @breadcrumb Core / Current Invoke\n * @public\n */\nexport function setCurrentInvoke<TEvent = any, TContext = any>({\n  event,\n  context,\n}: CurrentInvoke<TEvent, TContext>) {\n  currentInvoke.event = event;\n  currentInvoke.context = context;\n}\n","//#region Imports\n\nimport type { BothValueHeaders } from '../@types';\n\n//#endregion\n\n/**\n * Transform a header map and make sure the value is not an array\n *\n * @example\n * ```typescript\n * const headers = { 'accept-encoding': 'gzip', 'accept-language': ['en-US', 'en;q=0.9'] };\n * const flattenedHeaders = getFlattenedHeadersMap(headers, ',', true);\n * console.log(flattenedHeaders);\n * // { 'accept-encoding': 'gzip', 'accept-language': 'en-US,en;q=0.9' }\n * ```\n *\n * @param headersMap - The initial headers\n * @param separator - The separator used when we join the array of header's value\n * @param lowerCaseKey - Should put all keys in lowercase\n *\n * @breadcrumb Core / Headers\n * @public\n */\nexport function getFlattenedHeadersMap(\n  headersMap: BothValueHeaders,\n  separator: string = ',',\n  lowerCaseKey: boolean = false,\n): Record<string, string> {\n  return Object.keys(headersMap).reduce((acc, headerKey) => {\n    const newKey = lowerCaseKey ? headerKey.toLowerCase() : headerKey;\n    const headerValue = headersMap[headerKey];\n\n    if (Array.isArray(headerValue)) acc[newKey] = headerValue.join(separator);\n    else acc[newKey] = (headerValue ?? '') + '';\n\n    return acc;\n  }, {});\n}\n\n/**\n * Transforms a header map into a multi-value map header.\n *\n * @example\n * ```typescript\n * const headers = { 'accept-encoding': 'gzip', 'connection': ['keep-alive'] };\n * const multiValueHeaders = getMultiValueHeadersMap(headers);\n * console.log(multiValueHeaders);\n * // { 'accept-encoding': ['gzip'], 'connection': ['keep-alive'] }\n * ```\n *\n * @param headersMap - The initial headers\n *\n * @breadcrumb Core / Headers\n * @public\n */\nexport function getMultiValueHeadersMap(\n  headersMap: BothValueHeaders,\n): Record<string, string[]> {\n  return Object.keys(headersMap).reduce((acc, headerKey) => {\n    const headerValue = headersMap[headerKey];\n\n    acc[headerKey.toLowerCase()] = Array.isArray(headerValue)\n      ? headerValue.map(String)\n      : [String(headerValue)];\n\n    return acc;\n  }, {});\n}\n\n/**\n * The wrapper that holds the information about single value headers and cookies\n *\n * @breadcrumb Core / Headers\n * @public\n */\nexport type FlattenedHeadersAndCookies = {\n  /**\n   * Just the single value headers\n   */\n  headers: Record<string, string>;\n\n  /**\n   * The list of cookies\n   */\n  cookies: string[];\n};\n\n/**\n * Transforms a header map into a single value headers and cookies\n *\n * @param headersMap - The initial headers\n *\n * @breadcrumb Core / Headers\n * @public\n */\nexport function getFlattenedHeadersMapAndCookies(\n  headersMap: BothValueHeaders,\n): FlattenedHeadersAndCookies {\n  return Object.keys(headersMap).reduce(\n    (acc, headerKey) => {\n      const headerValue = headersMap[headerKey];\n      const lowerHeaderKey = headerKey.toLowerCase();\n\n      if (Array.isArray(headerValue)) {\n        if (lowerHeaderKey !== 'set-cookie')\n          acc.headers[headerKey] = headerValue.join(',');\n        else acc.cookies.push(...headerValue);\n      } else {\n        if (lowerHeaderKey === 'set-cookie' && headerValue !== undefined)\n          acc.cookies.push(headerValue ?? '');\n        else acc.headers[headerKey] = String(headerValue ?? '');\n      }\n\n      return acc;\n    },\n    {\n      cookies: [],\n      headers: {},\n    } as FlattenedHeadersAndCookies,\n  );\n}\n\n/**\n * Parse HTTP Raw Headers\n * Attribution to {@link https://github.com/kesla/parse-headers/blob/master/parse-headers.js}\n *\n * @param headers - The raw headers\n *\n * @breadcrumb Core / Headers\n * @public\n */\nexport function parseHeaders(\n  headers: string,\n): Record<string, string | string[]> {\n  if (!headers) return {};\n\n  const result = {};\n  const headersArr = headers.trim().split('\\n');\n\n  for (let i = 0; i < headersArr.length; i++) {\n    const row = headersArr[i];\n    const index = row.indexOf(':');\n    const key = row.slice(0, index).trim().toLowerCase();\n    const value = row.slice(index + 1).trim();\n\n    if (typeof result[key] === 'undefined') result[key] = value;\n    else if (Array.isArray(result[key])) result[key].push(value);\n    else result[key] = [result[key], value];\n  }\n\n  return result;\n}\n\nexport function keysToLowercase<T extends Record<string, unknown>>(\n  obj: T,\n): { [K in keyof T as Lowercase<string & K>]: T[K] } {\n  const result: any = {};\n  for (const [k, v] of Object.entries(obj)) result[k.toLowerCase()] = v;\n\n  return result as { [K in keyof T as Lowercase<string & K>]: T[K] };\n}\n","/**\n * No operation function is used when we need to pass a function, but we don't want to specify any behavior.\n *\n * @breadcrumb Core\n * @public\n */\nexport const NO_OP: (...args: any[]) => any = () => void 0;\n","import { NO_OP } from './no-op';\n\n/**\n * The type representing the possible log levels to choose from.\n *\n * @breadcrumb Core / Logger\n * @public\n */\nexport type LogLevels =\n  | 'debug'\n  | 'verbose'\n  | 'info'\n  | 'warn'\n  | 'error'\n  | 'none';\n\n/**\n * The options to customize {@link ILogger}\n *\n * @breadcrumb Core / Logger\n * @public\n */\nexport type LoggerOptions = {\n  /**\n   * Select the log level, {@link LogLevels | see more}.\n   *\n   * 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'error'],\n    ['warn', 'warn'],\n  ],\n  info: [\n    ['info', 'info'],\n    ['error', 'error'],\n    ['warn', 'warn'],\n  ],\n  warn: [\n    ['warn', 'warn'],\n    ['error', 'error'],\n  ],\n  error: [['error', 'error']],\n  none: [],\n};\n\nconst lazyPrint = (value: () => any | unknown) => {\n  if (typeof value === 'function') return value();\n\n  return value;\n};\n\nconst print =\n  (fn: string) =>\n  (message: any, ...additional: (() => any)[]) =>\n    console[fn](message, ...additional.map(lazyPrint));\n\n/**\n * The method used to create a simple logger instance to use in this library.\n *\n * @remarks Behind the scenes, this simple logger sends the message to the `console` methods.\n *\n * @example\n * ```typescript\n * const logger = createDefaultLogger();\n *\n * logger.error('An error happens.');\n * // An error happens.\n * ```\n *\n * @param level - Select the level of the log\n *\n * @breadcrumb Core / Logger\n * @public\n */\nexport function createDefaultLogger(\n  { level }: LoggerOptions = { level: 'error' },\n): ILogger {\n  const levels = logLevels[level];\n\n  if (!levels) throw new Error('Invalid log level');\n\n  const logger = {\n    [InternalLoggerSymbol]: true,\n    error: NO_OP,\n    debug: NO_OP,\n    info: NO_OP,\n    verbose: NO_OP,\n    warn: NO_OP,\n  } as ILogger;\n\n  for (const [level, consoleMethod] of levels)\n    logger[level] = print(consoleMethod);\n\n  return logger;\n}\n\n/**\n * The method used to chck if logger was created by this library, or it was defined by the user.\n *\n * @param logger - The instance of the logger to check\n *\n * @breadcrumb Core / Logger\n * @public\n */\nexport function isInternalLogger(logger: ILogger): boolean {\n  return !!logger[InternalLoggerSymbol];\n}\n","//#region Imports\n\nimport { Readable, Writable } from 'node:stream';\n\n//#endregion\n\n/**\n * Check if stream already ended\n *\n * @param stream - The stream\n *\n * @breadcrumb Core / Stream\n * @public\n */\nexport function 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