webr-serviceworker.js.map

{
  "version": 3,
  "sources": ["../src/webR/compat.ts", "../src/webR/utils.ts", "../src/webR/chan/message.ts", "../src/webR/chan/serviceworker.ts"],
  "sourcesContent": ["interface Process {\n  browser: string | undefined;\n  release: { [key: string]: string };\n}\ndeclare let process: Process;\n\nexport const IN_NODE =\n  typeof process !== 'undefined' &&\n  process.release &&\n  process.release.name === 'node' &&\n  typeof process.browser === 'undefined';\n\n// Adapted from https://github.com/pyodide/pyodide/blob/main/src/js/compat.ts\nexport let loadScript: (url: string) => Promise<void>;\nif (globalThis.document) {\n  loadScript = (url) =>\n    new Promise((resolve, reject) => {\n      const script = document.createElement('script');\n      script.src = url;\n      script.onload = () => resolve();\n      script.onerror = reject;\n      document.head.appendChild(script);\n    });\n} else if (globalThis.importScripts) {\n  loadScript = async (url) => {\n    try {\n      globalThis.importScripts(url);\n    } catch (e) {\n      if (e instanceof TypeError) {\n        await import(url);\n      } else {\n        throw e;\n      }\n    }\n  };\n} else if (IN_NODE) {\n  loadScript = async (url: string) => {\n    const nodePathMod = (await import('path')).default;\n    await import(nodePathMod.resolve(url));\n  };\n} else {\n  throw new Error('Cannot determine runtime environment');\n}\n", "import { IN_NODE } from './compat';\n\nexport type ResolveFn = (_value?: unknown) => void;\nexport type RejectFn = (_reason?: any) => void;\n\nexport function promiseHandles() {\n  const out = {\n    resolve: (_value?: unknown) => {},\n    reject: (_reason?: any) => {},\n    promise: null as unknown as Promise<unknown>,\n  };\n\n  const promise = new Promise((resolve, reject) => {\n    out.resolve = resolve;\n    out.reject = reject;\n  });\n  out.promise = promise;\n\n  return out;\n}\n\nexport function sleep(ms: number) {\n  return new Promise((resolve) => setTimeout(resolve, ms));\n}\n\nexport function replaceInObject<T>(\n  obj: T | T[],\n  test: (obj: any) => boolean,\n  replacer: (obj: any, ...replacerArgs: any[]) => unknown,\n  ...replacerArgs: unknown[]\n): T | T[] {\n  if (obj === null || typeof obj !== 'object') {\n    return obj;\n  }\n  if (test(obj)) {\n    return replacer(obj, ...replacerArgs) as T;\n  }\n  if (Array.isArray(obj) || ArrayBuffer.isView(obj)) {\n    return (obj as unknown[]).map((v) =>\n      replaceInObject(v, test, replacer, ...replacerArgs)\n    ) as T[];\n  }\n  return Object.fromEntries(\n    Object.entries(obj).map(([k, v], i) => [k, replaceInObject(v, test, replacer, ...replacerArgs)])\n  ) as T;\n}\n\n/* Workaround for loading a cross-origin script.\n *\n * When fetching a worker script, the fetch is required by the spec to\n * use \"same-origin\" mode. This is to avoid loading a worker with a\n * cross-origin global scope, which can allow for a cross-origin\n * restriction bypass.\n *\n * When the fetch URL begins with 'http', we assume the request is\n * cross-origin. We download the content of the URL using a XHR first,\n * create a blob URL containing the requested content, then load the\n * blob URL as a script.\n *\n * The origin of a blob URL is the same as that of the environment that\n * created the URL, and so the global scope of the resulting worker is\n * no longer cross-origin. In that case, the cross-origin restriction\n * bypass is not possible, and the script is permitted to be loaded.\n */\nexport function newCrossOriginWorker(url: string, cb: (worker: Worker) => void): void {\n  const req = new XMLHttpRequest();\n  req.open('get', url, true);\n  req.onload = () => {\n    const worker = new Worker(URL.createObjectURL(new Blob([req.responseText])));\n    cb(worker);\n  };\n  req.send();\n}\n\nexport function isCrossOrigin(urlString: string) {\n  if (IN_NODE) return false;\n  const url1 = new URL(location.href);\n  const url2 = new URL(urlString, location.origin);\n  if (url1.host === url2.host && url1.port === url2.port && url1.protocol === url2.protocol) {\n    return false;\n  }\n  return true;\n}\n\nexport function throwUnreachable(context?: string) {\n  let msg = 'Reached the unreachable';\n  msg = msg + (context ? ': ' + context : '.');\n\n  throw new Error(msg);\n}\n", "/**\n * WebR communication channel messaging and request types.\n * @module Message\n */\nimport { generateUUID, transfer, UUID } from './task-common';\n\n/** A webR communication channel message. */\nexport interface Message {\n  type: string;\n  data?: any;\n}\n\n/** A webR communication channel request. */\nexport interface Request {\n  type: 'request';\n  data: {\n    uuid: UUID;\n    msg: Message;\n  };\n}\n\n/** A webR communication channel response. */\nexport interface Response {\n  type: 'response';\n  data: {\n    uuid: UUID;\n    resp: unknown;\n  };\n}\n\n/** @internal */\nexport function newRequest(msg: Message, transferables?: [Transferable]): Request {\n  return newRequestResponseMessage(\n    {\n      type: 'request',\n      data: {\n        uuid: generateUUID(),\n        msg: msg,\n      },\n    },\n    transferables\n  );\n}\n\n/** @internal */\nexport function newResponse(uuid: UUID, resp: unknown, transferables?: [Transferable]): Response {\n  return newRequestResponseMessage(\n    {\n      type: 'response',\n      data: {\n        uuid,\n        resp,\n      },\n    },\n    transferables\n  );\n}\n\n/** @internal */\nfunction newRequestResponseMessage<T>(msg: T, transferables?: [Transferable]): T {\n  // Signal to Synclink that the data contains objects we wish to\n  // transfer, as in `postMessage()`\n  if (transferables) {\n    transfer(msg, transferables);\n  }\n  return msg;\n}\n\n/** A webR communication channel sync-request.\n * @internal\n */\nexport interface SyncRequest {\n  type: 'sync-request';\n  data: {\n    msg: Message;\n    reqData: SyncRequestData;\n  };\n}\n\n/** Transfer data required when using sync-request with SharedArrayBuffer.\n * @internal */\nexport interface SyncRequestData {\n  taskId?: number;\n  sizeBuffer: Int32Array;\n  signalBuffer: Int32Array;\n  dataBuffer: Uint8Array;\n}\n\n/** @internal */\nexport function newSyncRequest(msg: Message, data: SyncRequestData): SyncRequest {\n  return {\n    type: 'sync-request',\n    data: { msg, reqData: data },\n  };\n}\n\nconst encoder = new TextEncoder();\nconst decoder = new TextDecoder('utf-8');\n\n/**\n * Encode data for transfering from worker thread to main thread.\n * @param {any} data The message data to be serialised and encoded.\n * @return {Uint8Array} The encoded data.\n * @internal\n * */\nexport function encodeData(data: any): Uint8Array {\n  // TODO: Pass a `replacer` function\n  return encoder.encode(JSON.stringify(data));\n}\n\n/**\n * Decode data that has been transferred from worker thread to main thread.\n * @param {any} data The message data to be decoded.\n * @return {unknown} The data after decoding.\n * @internal\n * */\nexport function decodeData(data: Uint8Array): unknown {\n  return JSON.parse(decoder.decode(data)) as unknown;\n}\n", "import { promiseHandles } from '../utils';\nimport { decodeData, encodeData } from './message';\n\ndeclare let self: ServiceWorkerGlobalScope;\n\nconst requests: {\n  [key: string]: {\n    resolve: (_value?: unknown) => void;\n    reject: (_reason?: any) => void;\n    promise: Promise<unknown>;\n  };\n} = {};\n\nfunction handleInstall() {\n  console.log('webR service worker installed');\n  self.skipWaiting();\n}\n\nfunction handleActivate(event: ExtendableEvent) {\n  console.log('webR service worker activating');\n  event.waitUntil(self.clients.claim());\n}\n\nconst sendRequest = async (clientId: string, uuid: string): Promise<Response> => {\n  const client = await self.clients.get(clientId);\n  if (!client) {\n    throw new Error('Service worker client not found');\n  }\n\n  if (!(uuid in requests)) {\n    requests[uuid] = promiseHandles();\n    client.postMessage({ type: 'request', data: uuid });\n  }\n\n  const response = await requests[uuid].promise;\n  const headers = { 'Cross-Origin-Embedder-Policy': 'require-corp' };\n  return new Response(encodeData(response), { headers });\n};\n\nconst handleFetch = (event: FetchEvent) => {\n  // console.log('service worker got a fetch', event);\n  const wasmMatch = /__wasm__\\/webr-fetch-request\\//.exec(event.request.url);\n  if (!wasmMatch) {\n    return;\n  }\n  const requestBody = event.request.arrayBuffer();\n  const requestReponse = requestBody.then(async (body) => {\n    const data = decodeData(new Uint8Array(body)) as { clientId: string; uuid: string };\n    return await sendRequest(data.clientId, data.uuid);\n  });\n  event.waitUntil(requestReponse);\n  event.respondWith(requestReponse);\n};\n\nfunction handleMessage(event: ExtendableMessageEvent) {\n  // console.log('service worker got a message', event.data);\n  switch (event.data.type) {\n    case 'register-client-main': {\n      self.clients.claim();\n      const source = event.source as WindowClient;\n      self.clients.get(source.id).then((client) => {\n        if (!client) {\n          throw new Error(\"Can't respond to client in service worker message handler\");\n        }\n        client.postMessage({\n          type: 'registration-successful',\n          clientId: source.id,\n        });\n      });\n      break;\n    }\n    case 'wasm-webr-fetch-response': {\n      if (event.data.uuid in requests) {\n        requests[event.data.uuid].resolve(event.data.response);\n        delete requests[event.data.uuid];\n      }\n      break;\n    }\n    default:\n      throw new Error(`Unknown service worker message type: ${event.data.type as string}`);\n  }\n}\n\nself.addEventListener('install', handleInstall);\nself.addEventListener('activate', handleActivate);\nself.addEventListener('fetch', handleFetch);\nself.addEventListener('message', handleMessage);\n"],
  "mappings": ";;;;;;;;;;;;;;;;;;;;;AAMO,IAAM,UACX,OAAO,YAAY,eACnB,QAAQ,WACR,QAAQ,QAAQ,SAAS,UACzB,OAAO,QAAQ,YAAY;AAGtB,IAAI;AACX,IAAI,WAAW,UAAU;AACvB,eAAa,CAAC,QACZ,IAAI,QAAQ,CAAC,SAAS,WAAW;AAC/B,UAAM,SAAS,SAAS,cAAc,QAAQ;AAC9C,WAAO,MAAM;AACb,WAAO,SAAS,MAAM,QAAQ;AAC9B,WAAO,UAAU;AACjB,aAAS,KAAK,YAAY,MAAM;AAAA,EAClC,CAAC;AACL,WAAW,WAAW,eAAe;AACnC,eAAa,OAAO,QAAQ;AAC1B,QAAI;AACF,iBAAW,cAAc,GAAG;AAAA,IAC9B,SAAS,GAAP;AACA,UAAI,aAAa,WAAW;AAC1B,cAAM,6BAAO,QAAP,QAAO;AAAA,MACf,OAAO;AACL,cAAM;AAAA,MACR;AAAA,IACF;AAAA,EACF;AACF,WAAW,SAAS;AAClB,eAAa,OAAO,QAAgB;AAClC,UAAM,eAAe,MAAM,6CAAO,WAAS;AAC3C,UAAM,6BAAO,QAAP,QAAO,YAAY,QAAQ,GAAG;AAAA,EACtC;AACF,OAAO;AACL,QAAM,IAAI,MAAM,sCAAsC;AACxD;;;ACrCO,SAAS,iBAAiB;AAC/B,QAAM,MAAM;AAAA,IACV,SAAS,CAAC,WAAqB;AAAA,IAAC;AAAA,IAChC,QAAQ,CAAC,YAAkB;AAAA,IAAC;AAAA,IAC5B,SAAS;AAAA,EACX;AAEA,QAAM,UAAU,IAAI,QAAQ,CAAC,SAAS,WAAW;AAC/C,QAAI,UAAU;AACd,QAAI,SAAS;AAAA,EACf,CAAC;AACD,MAAI,UAAU;AAEd,SAAO;AACT;;;AC6EA,IAAM,UAAU,IAAI,YAAY;AAChC,IAAM,UAAU,IAAI,YAAY,OAAO;AAQhC,SAAS,WAAW,MAAuB;AAEhD,SAAO,QAAQ,OAAO,KAAK,UAAU,IAAI,CAAC;AAC5C;AAQO,SAAS,WAAW,MAA2B;AACpD,SAAO,KAAK,MAAM,QAAQ,OAAO,IAAI,CAAC;AACxC;;;ACjHA,IAAM,WAMF,CAAC;AAEL,SAAS,gBAAgB;AACvB,UAAQ,IAAI,+BAA+B;AAC3C,OAAK,YAAY;AACnB;AAEA,SAAS,eAAe,OAAwB;AAC9C,UAAQ,IAAI,gCAAgC;AAC5C,QAAM,UAAU,KAAK,QAAQ,MAAM,CAAC;AACtC;AAEA,IAAM,cAAc,OAAO,UAAkB,SAAoC;AAC/E,QAAM,SAAS,MAAM,KAAK,QAAQ,IAAI,QAAQ;AAC9C,MAAI,CAAC,QAAQ;AACX,UAAM,IAAI,MAAM,iCAAiC;AAAA,EACnD;AAEA,MAAI,EAAE,QAAQ,WAAW;AACvB,aAAS,QAAQ,eAAe;AAChC,WAAO,YAAY,EAAE,MAAM,WAAW,MAAM,KAAK,CAAC;AAAA,EACpD;AAEA,QAAM,WAAW,MAAM,SAAS,MAAM;AACtC,QAAM,UAAU,EAAE,gCAAgC,eAAe;AACjE,SAAO,IAAI,SAAS,WAAW,QAAQ,GAAG,EAAE,QAAQ,CAAC;AACvD;AAEA,IAAM,cAAc,CAAC,UAAsB;AAEzC,QAAM,YAAY,iCAAiC,KAAK,MAAM,QAAQ,GAAG;AACzE,MAAI,CAAC,WAAW;AACd;AAAA,EACF;AACA,QAAM,cAAc,MAAM,QAAQ,YAAY;AAC9C,QAAM,iBAAiB,YAAY,KAAK,OAAO,SAAS;AACtD,UAAM,OAAO,WAAW,IAAI,WAAW,IAAI,CAAC;AAC5C,WAAO,MAAM,YAAY,KAAK,UAAU,KAAK,IAAI;AAAA,EACnD,CAAC;AACD,QAAM,UAAU,cAAc;AAC9B,QAAM,YAAY,cAAc;AAClC;AAEA,SAAS,cAAc,OAA+B;AAEpD,UAAQ,MAAM,KAAK;AAAA,SACZ,wBAAwB;AAC3B,WAAK,QAAQ,MAAM;AACnB,YAAM,SAAS,MAAM;AACrB,WAAK,QAAQ,IAAI,OAAO,EAAE,EAAE,KAAK,CAAC,WAAW;AAC3C,YAAI,CAAC,QAAQ;AACX,gBAAM,IAAI,MAAM,2DAA2D;AAAA,QAC7E;AACA,eAAO,YAAY;AAAA,UACjB,MAAM;AAAA,UACN,UAAU,OAAO;AAAA,QACnB,CAAC;AAAA,MACH,CAAC;AACD;AAAA,IACF;AAAA,SACK,4BAA4B;AAC/B,UAAI,MAAM,KAAK,QAAQ,UAAU;AAC/B,iBAAS,MAAM,KAAK,MAAM,QAAQ,MAAM,KAAK,QAAQ;AACrD,eAAO,SAAS,MAAM,KAAK;AAAA,MAC7B;AACA;AAAA,IACF;AAAA;AAEE,YAAM,IAAI,MAAM,wCAAwC,MAAM,KAAK,MAAgB;AAAA;AAEzF;AAEA,KAAK,iBAAiB,WAAW,aAAa;AAC9C,KAAK,iBAAiB,YAAY,cAAc;AAChD,KAAK,iBAAiB,SAAS,WAAW;AAC1C,KAAK,iBAAiB,WAAW,aAAa;",
  "names": []
}