node_modules/@mswjs/interceptors/lib/browser/chunk-MAEPOYB6.mjs.map

{"version":3,"sources":["../../src/interceptors/fetch/index.ts","../../src/utils/canParseUrl.ts"],"sourcesContent":["import { invariant } from 'outvariant'\nimport { DeferredPromise } from '@open-draft/deferred-promise'\nimport { until } from '@open-draft/until'\nimport { HttpRequestEventMap, IS_PATCHED_MODULE } from '../../glossary'\nimport { Interceptor } from '../../Interceptor'\nimport { toInteractiveRequest } from '../../utils/toInteractiveRequest'\nimport { emitAsync } from '../../utils/emitAsync'\nimport { canParseUrl } from '../../utils/canParseUrl'\nimport { createRequestId } from '../../createRequestId'\nimport {\n  createServerErrorResponse,\n  isResponseError,\n} from '../../utils/responseUtils'\n\nexport class FetchInterceptor extends Interceptor<HttpRequestEventMap> {\n  static symbol = Symbol('fetch')\n\n  constructor() {\n    super(FetchInterceptor.symbol)\n  }\n\n  protected checkEnvironment() {\n    return (\n      typeof globalThis !== 'undefined' &&\n      typeof globalThis.fetch !== 'undefined'\n    )\n  }\n\n  protected async setup() {\n    const pureFetch = globalThis.fetch\n\n    invariant(\n      !(pureFetch as any)[IS_PATCHED_MODULE],\n      'Failed to patch the \"fetch\" module: already patched.'\n    )\n\n    globalThis.fetch = async (input, init) => {\n      const requestId = createRequestId()\n\n      /**\n       * @note Resolve potentially relative request URL\n       * against the present `location`. This is mainly\n       * for native `fetch` in JSDOM.\n       * @see https://github.com/mswjs/msw/issues/1625\n       */\n      const resolvedInput =\n        typeof input === 'string' &&\n        typeof location !== 'undefined' &&\n        !canParseUrl(input)\n          ? new URL(input, location.origin)\n          : input\n\n      const request = new Request(resolvedInput, init)\n\n      this.logger.info('[%s] %s', request.method, request.url)\n\n      const { interactiveRequest, requestController } =\n        toInteractiveRequest(request)\n\n      this.logger.info(\n        'emitting the \"request\" event for %d listener(s)...',\n        this.emitter.listenerCount('request')\n      )\n\n      this.emitter.once('request', ({ requestId: pendingRequestId }) => {\n        if (pendingRequestId !== requestId) {\n          return\n        }\n\n        if (requestController.responsePromise.state === 'pending') {\n          requestController.responsePromise.resolve(undefined)\n        }\n      })\n\n      this.logger.info('awaiting for the mocked response...')\n\n      const signal = interactiveRequest.signal\n      const requestAborted = new DeferredPromise()\n\n      // Signal isn't always defined in react-native.\n      if (signal) {\n        signal.addEventListener(\n          'abort',\n          () => {\n            requestAborted.reject(signal.reason)\n          },\n          { once: true }\n        )\n      }\n\n      const responsePromise = new DeferredPromise<Response>()\n\n      const respondWith = (response: Response): void => {\n        this.logger.info('responding with a mock response:', response)\n\n        if (this.emitter.listenerCount('response') > 0) {\n          this.logger.info('emitting the \"response\" event...')\n\n          // Clone the mocked response for the \"response\" event listener.\n          // This way, the listener can read the response and not lock its body\n          // for the actual fetch consumer.\n          const responseClone = response.clone()\n\n          this.emitter.emit('response', {\n            response: responseClone,\n            isMockedResponse: true,\n            request: interactiveRequest,\n            requestId,\n          })\n        }\n\n        // Set the \"response.url\" property to equal the intercepted request URL.\n        Object.defineProperty(response, 'url', {\n          writable: false,\n          enumerable: true,\n          configurable: false,\n          value: request.url,\n        })\n\n        responsePromise.resolve(response)\n      }\n\n      const errorWith = (reason: unknown): void => {\n        responsePromise.reject(reason)\n      }\n\n      const resolverResult = await until<unknown, Response | undefined>(\n        async () => {\n          const listenersFinished = emitAsync(this.emitter, 'request', {\n            request: interactiveRequest,\n            requestId,\n          })\n\n          await Promise.race([\n            requestAborted,\n            // Put the listeners invocation Promise in the same race condition\n            // with the request abort Promise because otherwise awaiting the listeners\n            // would always yield some response (or undefined).\n            listenersFinished,\n            requestController.responsePromise,\n          ])\n\n          this.logger.info('all request listeners have been resolved!')\n\n          const mockedResponse = await requestController.responsePromise\n          this.logger.info('event.respondWith called with:', mockedResponse)\n\n          return mockedResponse\n        }\n      )\n\n      if (requestAborted.state === 'rejected') {\n        this.logger.info(\n          'request has been aborted:',\n          requestAborted.rejectionReason\n        )\n\n        responsePromise.reject(requestAborted.rejectionReason)\n        return responsePromise\n      }\n\n      if (resolverResult.error) {\n        this.logger.info(\n          'request listerner threw an error:',\n          resolverResult.error\n        )\n\n        // Treat thrown Responses as mocked responses.\n        if (resolverResult.error instanceof Response) {\n          // Treat thrown Response.error() as a request error.\n          if (isResponseError(resolverResult.error)) {\n            errorWith(createNetworkError(resolverResult.error))\n          } else {\n            // Treat the rest of thrown Responses as mocked responses.\n            respondWith(resolverResult.error)\n          }\n        }\n\n        // Emit the \"unhandledException\" interceptor event so the client\n        // can opt-out from exceptions translating to 500 error responses.\n\n        if (this.emitter.listenerCount('unhandledException') > 0) {\n          await emitAsync(this.emitter, 'unhandledException', {\n            error: resolverResult.error,\n            request,\n            requestId,\n            controller: {\n              respondWith,\n              errorWith,\n            },\n          })\n\n          if (responsePromise.state !== 'pending') {\n            return responsePromise\n          }\n        }\n\n        // Unhandled exceptions in the request listeners are\n        // synonymous to unhandled exceptions on the server.\n        // Those are represented as 500 error responses.\n        respondWith(createServerErrorResponse(resolverResult.error))\n        return responsePromise\n      }\n\n      const mockedResponse = resolverResult.data\n\n      if (mockedResponse && !request.signal?.aborted) {\n        this.logger.info('received mocked response:', mockedResponse)\n\n        // Reject the request Promise on mocked \"Response.error\" responses.\n        if (isResponseError(mockedResponse)) {\n          this.logger.info(\n            'received a network error response, rejecting the request promise...'\n          )\n\n          /**\n           * Set the cause of the request promise rejection to the\n           * network error Response instance. This differs from Undici.\n           * Undici will forward the \"response.error\" custom property\n           * as the rejection reason but for \"Response.error()\" static method\n           * \"response.error\" will equal to undefined, making \"cause\" an empty Error.\n           * @see https://github.com/nodejs/undici/blob/83cb522ae0157a19d149d72c7d03d46e34510d0a/lib/fetch/response.js#L344\n           */\n          errorWith(createNetworkError(mockedResponse))\n        } else {\n          respondWith(mockedResponse)\n        }\n\n        return responsePromise\n      }\n\n      this.logger.info('no mocked response received!')\n\n      return pureFetch(request).then((response) => {\n        this.logger.info('original fetch performed', response)\n\n        if (this.emitter.listenerCount('response') > 0) {\n          this.logger.info('emitting the \"response\" event...')\n\n          const responseClone = response.clone()\n\n          this.emitter.emit('response', {\n            response: responseClone,\n            isMockedResponse: false,\n            request: interactiveRequest,\n            requestId,\n          })\n        }\n\n        return response\n      })\n    }\n\n    Object.defineProperty(globalThis.fetch, IS_PATCHED_MODULE, {\n      enumerable: true,\n      configurable: true,\n      value: true,\n    })\n\n    this.subscriptions.push(() => {\n      Object.defineProperty(globalThis.fetch, IS_PATCHED_MODULE, {\n        value: undefined,\n      })\n\n      globalThis.fetch = pureFetch\n\n      this.logger.info(\n        'restored native \"globalThis.fetch\"!',\n        globalThis.fetch.name\n      )\n    })\n  }\n}\n\nfunction createNetworkError(cause: unknown) {\n  return Object.assign(new TypeError('Failed to fetch'), {\n    cause,\n  })\n}\n","/**\n * Returns a boolean indicating whether the given URL string\n * can be parsed into a `URL` instance.\n * A substitute for `URL.canParse()` for Node.js 18.\n */\nexport function canParseUrl(url: string): boolean {\n  try {\n    new URL(url)\n    return true\n  } catch (_error) {\n    return false\n  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