@swan-io/request/dist/Request.mjs.map

Wrapper for XMLHttpRequest with better data-structures

{"version":3,"file":"Request.mjs","sources":["../src/Request.ts"],"sourcesContent":["import { Future, Option, Result } from \"@swan-io/boxed\";\n\n// The type system allows us infer the response type from the requested `responseType`\ntype ResponseType = \"text\" | \"arraybuffer\" | \"blob\" | \"json\";\n\ntype ResponseTypeMap = {\n  text: string;\n  arraybuffer: ArrayBuffer;\n  blob: Blob;\n  json: unknown;\n};\n\ntype Method = \"GET\" | \"POST\" | \"OPTIONS\" | \"PATCH\" | \"PUT\" | \"DELETE\";\n\nexport class NetworkError extends Error {\n  url: string;\n  constructor(url: string) {\n    super(`Request to ${url} failed`);\n    Object.setPrototypeOf(this, NetworkError.prototype);\n    this.name = \"NetworkError\";\n    this.url = url;\n  }\n}\n\nexport class TimeoutError extends Error {\n  url: string;\n  timeout: number | undefined;\n  constructor(url: string, timeout?: number) {\n    if (timeout == undefined) {\n      super(`Request to ${url} timed out`);\n    } else {\n      super(`Request to ${url} timed out (> ${timeout}ms)`);\n    }\n    Object.setPrototypeOf(this, TimeoutError.prototype);\n    this.name = \"TimeoutError\";\n    this.url = url;\n    this.timeout = timeout;\n  }\n}\n\nexport class CanceledError extends Error {\n  constructor() {\n    super();\n    Object.setPrototypeOf(this, CanceledError.prototype);\n    this.name = \"CanceledError\";\n  }\n}\n\ntype Config<T extends ResponseType> = {\n  url: string;\n  method?: Method;\n  type: T;\n  body?: BodyInit | null;\n  headers?: Record<string, string>;\n  credentials?: RequestCredentials;\n  timeout?: number;\n  cache?: RequestCache;\n  integrity?: string;\n  keepalive?: boolean;\n  mode?: RequestMode;\n  priority?: RequestPriority;\n  redirect?: RequestRedirect;\n  referrer?: string;\n  referrerPolicy?: ReferrerPolicy;\n  window?: null;\n};\n\nexport type Response<T> = {\n  status: number;\n  ok: boolean;\n  response: Option<T>;\n  url: string;\n  headers: Headers;\n};\n\nconst resolvedPromise = Promise.resolve();\n\nconst make = <T extends ResponseType>({\n  url,\n  method,\n  type,\n  body,\n  headers,\n  credentials,\n  timeout,\n  cache,\n  integrity,\n  keepalive,\n  mode,\n  priority,\n  redirect,\n  referrer,\n  referrerPolicy,\n  window,\n}: Config<T>): Future<\n  Result<Response<ResponseTypeMap[T]>, NetworkError | TimeoutError>\n> => {\n  return Future.make<\n    Result<Response<ResponseTypeMap[T]>, NetworkError | TimeoutError>\n  >((resolve) => {\n    const controller = new AbortController();\n\n    if (timeout) {\n      setTimeout(() => {\n        controller.abort(new TimeoutError(url, timeout));\n      }, timeout);\n    }\n\n    const init = async () => {\n      const res = await fetch(url, {\n        method,\n        credentials,\n        headers,\n        signal: controller.signal,\n        body,\n        cache,\n        integrity,\n        keepalive,\n        mode,\n        priority,\n        redirect,\n        referrer,\n        referrerPolicy,\n        window,\n      });\n\n      let payload;\n      try {\n        if (type === \"arraybuffer\") {\n          payload = Option.Some(await res.arrayBuffer());\n        }\n        if (type === \"blob\") {\n          payload = Option.Some(await res.blob());\n        }\n        if (type === \"json\") {\n          payload = Option.Some(await res.json());\n        }\n        if (type === \"text\") {\n          payload = Option.Some(await res.text());\n        }\n      } catch {\n        payload = Option.None();\n      }\n\n      const response: Response<ResponseTypeMap[T]> = {\n        url,\n        status: res.status,\n        ok: res.ok,\n        headers: res.headers,\n        response: payload as Option<ResponseTypeMap[T]>,\n      };\n      return response;\n    };\n\n    init().then(\n      (response) => resolve(Result.Ok(response)),\n      (error) => {\n        if (error instanceof CanceledError) {\n          return resolvedPromise;\n        }\n        if (error instanceof TimeoutError) {\n          resolve(Result.Error(error));\n          return resolvedPromise;\n        }\n        resolve(Result.Error(new NetworkError(url)));\n        return resolvedPromise;\n      },\n    );\n\n    return () => {\n      controller.abort(new CanceledError());\n    };\n  });\n};\n\nexport class BadStatusError extends Error {\n  url: string;\n  status: number;\n  response: unknown;\n  constructor(url: string, status: number, response?: unknown) {\n    super(`Request to ${url} gave status ${status}`);\n    Object.setPrototypeOf(this, BadStatusError.prototype);\n    this.name = \"BadStatusError\";\n    this.url = url;\n    this.status = status;\n    this.response = response;\n  }\n}\n\nexport const badStatusToError = <T>(\n  response: Response<T>,\n): Result<Response<T>, BadStatusError> => {\n  return response.ok\n    ? 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