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the response.\n   * @param request - The request to be made.\n   */\n  public async sendRequest(request: PipelineRequest): Promise<PipelineResponse> {\n    const url = new URL(request.url);\n    const isInsecure = url.protocol !== \"https:\";\n\n    if (isInsecure && !request.allowInsecureConnection) {\n      throw new Error(`Cannot connect to ${request.url} while allowInsecureConnection is false.`);\n    }\n\n    if (request.proxySettings) {\n      throw new Error(\"HTTP proxy is not supported in browser environment\");\n    }\n\n    try {\n      return await makeRequest(request);\n    } catch (e: any) {\n      throw getError(e, request);\n    }\n  }\n}\n\n/**\n * Sends a request\n */\nasync function makeRequest(request: PipelineRequest): Promise<PipelineResponse> {\n  const { abortController, abortControllerCleanup } = setupAbortSignal(request);\n  try {\n    const headers = buildFetchHeaders(request.headers);\n    const { streaming, body: requestBody } = buildRequestBody(request);\n    const requestInit: RequestInit = {\n      body: requestBody,\n      method: request.method,\n      headers: headers,\n      signal: abortController.signal,\n      // Cloudflare doesn't implement the full Fetch API spec\n      // because of some of it doesn't make sense in the edge.\n      // See https://github.com/cloudflare/workerd/issues/902\n      ...(\"credentials\" in Request.prototype\n        ? { credentials: request.withCredentials ? \"include\" : \"same-origin\" }\n        : {}),\n      ...(\"cache\" in Request.prototype ? { cache: \"no-store\" } : {}),\n    };\n\n    // According to https://fetch.spec.whatwg.org/#fetch-method,\n    // init.duplex must be set when body is a ReadableStream object.\n    // currently \"half\" is the only valid value.\n    if (streaming) {\n      (requestInit as any).duplex = \"half\";\n    }\n    /**\n     * Developers of the future:\n     * Do not set redirect: \"manual\" as part\n     * of request options.\n     * It will not work as you expect.\n     */\n    const response = await fetch(request.url, requestInit);\n    // If we're uploading a blob, we need to fire the progress event manually\n    if (isBlob(request.body) && request.onUploadProgress) {\n      request.onUploadProgress({ loadedBytes: request.body.size });\n    }\n    return buildPipelineResponse(response, request, abortControllerCleanup);\n  } catch (e) {\n    abortControllerCleanup?.();\n    throw e;\n  }\n}\n\n/**\n * Creates a pipeline response from a Fetch response;\n */\nasync function buildPipelineResponse(\n  httpResponse: Response,\n  request: PipelineRequest,\n  abortControllerCleanup?: () => void,\n): Promise<PipelineResponse> {\n  const headers = buildPipelineHeaders(httpResponse);\n  const response: PipelineResponse = {\n    request,\n    headers,\n    status: httpResponse.status,\n  };\n\n  const bodyStream = isWebReadableStream(httpResponse.body)\n    ? buildBodyStream(httpResponse.body, {\n        onProgress: request.onDownloadProgress,\n   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 let abortControllerCleanup: (() => void) | undefined;\n\n  /**\n   * Attach an abort listener to the request\n   */\n  let abortListener: ((event: any) => void) | undefined;\n  if (request.abortSignal) {\n    if (request.abortSignal.aborted) {\n      throw new AbortError(\"The operation was aborted.\");\n    }\n\n    abortListener = (event: Event) => {\n      if (event.type === \"abort\") {\n        abortController.abort();\n      }\n    };\n    request.abortSignal.addEventListener(\"abort\", abortListener);\n    abortControllerCleanup = () => {\n      if (abortListener) {\n        request.abortSignal?.removeEventListener(\"abort\", abortListener);\n      }\n    };\n  }\n\n  // If a timeout was passed, call the abort signal once the time elapses\n  if (request.timeout > 0) {\n    setTimeout(() => {\n      abortController.abort();\n    }, request.timeout);\n  }\n\n  return { abortController, abortControllerCleanup };\n}\n\n/**\n * Gets the specific error\n */\n// 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