nftstorage.link/dist/src/perma-cache.cjs.map

Utilities for working with the NFT.Storage IPFS Edge Gateway

{"version":3,"file":"perma-cache.cjs","sources":["../../src/perma-cache.js"],"sourcesContent":["/**\n * A client library for the https://api.nftstorage.link/ perma-cache service. It provides a convenient\n * interface for working with the [Raw HTTP API](https://nftstorage.link/#api-docs)\n * from a web browser or [Node.js](https://nodejs.org/) and comes bundled with\n * TS for out-of-the box type inference and better IntelliSense.\n *\n * @example\n * ```js\n * import { PermaCache } from 'nftstorage.link'\n *\n * const urls = [\n *  'https://bafkreidyeivj7adnnac6ljvzj2e3rd5xdw3revw4da7mx2ckrstapoupoq.ipfs.nftstorage.link'\n * ]\n *\n * const cache = new PermaCache({ token: 'YOUR_NFT_STORAGE_TOKEN' })\n * const permaCacheEntries = await cache.put(urls)\n * await cache.delete(urls)\n * ```\n * @module\n */\n\nimport throttledQueue from 'throttled-queue'\nimport pSettle from 'p-settle'\nimport pRetry, { AbortError } from 'p-retry'\n\nimport { fetch } from './platform.js'\n\nconst MAX_RETRIES = 5\n// These match what is enforced server-side\nconst RATE_LIMIT_REQUESTS = 100\nconst RATE_LIMIT_PERIOD = 60 * 1000\n\n/**\n * @typedef { import('./lib/interface.js').RateLimiter } RateLimiter\n * @typedef { import('./lib/interface.js').Service } Service\n * @typedef { import('./lib/interface.js').PutOptions} PutOptions\n * @typedef { import('./lib/interface.js').DeleteOptions} DeleteOptions\n * @typedef { import('./lib/interface.js').ListOptions} ListOptions\n * @typedef { import('./lib/interface.js').CacheResult} CacheResult\n * @typedef { import('./lib/interface.js').CacheDeleteResult} CacheDeleteResult\n * @typedef { import('./lib/interface.js').CacheEntry} CacheEntry\n * @typedef { import('./lib/interface.js').AccountInfo} AccountInfo\n */\n\n/**\n * @implements Service\n */\nexport class PermaCache {\n  /**\n   * Constructs a client bound to the given `options.token` and\n   * `options.endpoint`.\n   *\n   * @example\n   * ```js\n   * import { PermaCache } from 'nftstorage.link'\n   * const cache = new PermaCache({ token: API_TOKEN })\n   * ```\n   *\n   * @param {{token: string, endpoint?:URL, rateLimiter?: RateLimiter}} options\n   */\n  constructor({\n    token,\n    endpoint = new URL('https://api.nftstorage.link'),\n    rateLimiter,\n  }) {\n    /**\n     * Authorization token.\n     *\n     * @readonly\n     */\n    this.token = token\n    /**\n     * Service API endpoint `URL`.\n     * @readonly\n     */\n    this.endpoint = endpoint\n    /**\n     * @readonly\n     */\n    this.rateLimiter = rateLimiter || createRateLimiter()\n  }\n\n  /**\n   * @hidden\n   * @param {string} token\n   * @returns {Record<string, string>}\n   */\n  static headers(token) {\n    /* c8 ignore next 1 */\n    if (!token) throw new Error('missing token')\n    return {\n      Authorization: `Bearer ${token}`,\n      'X-Client': 'nftstorage.link/js',\n    }\n  }\n\n  /**\n   * @param {Service} service\n   * @param {string[]} urls\n   * @param {PutOptions} [options]\n   * @returns {Promise<CacheResult[]>}\n   */\n  static async put(\n    { endpoint, token, rateLimiter = globalRateLimiter },\n    urls,\n    { onPut, maxRetries } = {}\n  ) {\n    urls.forEach(validateUrl)\n\n    const headers = PermaCache.headers(token)\n\n    /** @type {import('p-settle').PromiseResult<CacheResult>[]} */\n    const cacheResults = await pSettle(\n      urls.map(async (url) => {\n        const apiUrl = new URL(\n          `perma-cache/${encodeURIComponent(url)}`,\n          endpoint\n        )\n\n        return await pRetry(\n          async () => {\n            await rateLimiter()\n            const response = await fetch(apiUrl.toString(), {\n              method: 'POST',\n              headers,\n            })\n\n            /** @type {CacheResult} */\n            const result = await response.json()\n            if (!response.ok) {\n              // @ts-ignore Only exists on Error\n              const e = new Error(result.message)\n              // do not retry if fatal errors - will not succeed\n              if (response.status >= 400 && response.status < 500) {\n                throw new AbortError(e)\n              }\n              /* c8 ignore next 2 */\n              throw e\n            }\n            onPut && onPut(url)\n\n            return result\n          },\n          /* c8 ignore next 3 */\n          {\n            retries: maxRetries == null ? MAX_RETRIES : maxRetries,\n          }\n        )\n      })\n    )\n\n    return cacheResults.map((r, i) => {\n      // @ts-ignore reason and value might not exist, but one of them always exists\n      return r.reason ? { url: urls[i], error: r.reason.message } : r.value\n    })\n  }\n\n  /**\n   * @param {Service} service\n   * @param {ListOptions} [options]\n   * @returns {AsyncIterable<CacheEntry>}\n   */\n  static async *list(\n    { endpoint, token, rateLimiter = globalRateLimiter },\n    { sort = 'date', order = 'asc' } = {}\n  ) {\n    const headers = PermaCache.headers(token)\n    let search = new URLSearchParams({ sort, order })\n    let nextPageUrl = new URL(`perma-cache?${search}`, endpoint)\n\n    while (true) {\n      await rateLimiter()\n\n      const response = await fetch(nextPageUrl.toString(), {\n        method: 'GET',\n        headers,\n      })\n      const result = await response.json()\n      if (!response.ok) {\n        throw new Error(result.message)\n      }\n\n      for (const entry of result) {\n        yield entry\n      }\n\n      // Go over next links until not provided by API anymore\n      const link = response.headers.get('link')\n      if (!link) {\n        break\n      }\n      nextPageUrl = new URL(\n        link.replace('<', '').replace('>; rel=\"next\"', ''),\n        endpoint\n      )\n    }\n  }\n\n  /**\n   * @param {Service} service\n   * @param {string[]} urls\n   * @param {DeleteOptions} [options]\n   * @returns {Promise<CacheDeleteResult[]>}\n   */\n  static async delete(\n    { endpoint, token, rateLimiter = globalRateLimiter },\n    urls,\n    { onDelete, maxRetries } = {}\n  ) {\n    urls.forEach(validateUrl)\n\n    const headers = PermaCache.headers(token)\n\n    /** @type {import('p-settle').PromiseResult<CacheDeleteResult>[]} */\n    const cacheDeleteResults = await pSettle(\n      urls.map(async (url) => {\n        const apiUrl = new URL(\n          `perma-cache/${encodeURIComponent(url)}`,\n          endpoint\n        )\n\n        return await pRetry(\n          async () => {\n            await rateLimiter()\n            const response = await fetch(apiUrl.toString(), {\n              method: 'DELETE',\n              headers,\n            })\n\n            const result = await response.json()\n            if (!response.ok) {\n              const e = new Error(result.message)\n              // do not retry if fatal errors - will not succeed\n              if (response.status >= 400 && response.status < 500) {\n                throw new AbortError(e)\n              }\n              /* c8 ignore next 2 */\n              throw e\n            }\n\n            onDelete && onDelete(url)\n\n            return {\n              url,\n            }\n          },\n          /* c8 ignore next 3 */\n          {\n            retries: maxRetries == null ? MAX_RETRIES : maxRetries,\n          }\n        )\n      })\n    )\n\n    return cacheDeleteResults.map((r, i) => {\n      // @ts-ignore reason and value might not exist, but one of them always exists\n      return r.reason ? { url: urls[i], error: r.reason.message } : r.value\n    })\n  }\n\n  /**\n   * @param {Service} service\n   * @return {Promise<AccountInfo>}\n   */\n  static async accountInfo({\n    endpoint,\n    token,\n    rateLimiter = globalRateLimiter,\n  }) {\n    const url = new URL('perma-cache/account', endpoint)\n    const headers = PermaCache.headers(token)\n\n    await rateLimiter()\n    const response = await fetch(url.toString(), {\n      method: 'GET',\n      headers,\n    })\n    const result = await response.json()\n    if (!response.ok) {\n      throw new Error(result.message)\n    }\n\n    return result\n  }\n\n  // Just a sugar so you don't have to pass around endpoint and token around.\n\n  /**\n   * Perma cache URLS into nftstorage.link.\n   *\n   * Returns the corresponding Perma cache entries created.\n   *\n   * @param {string[]} urls\n   * @param {PutOptions} [options]\n   * @returns {Promise<CacheResult[]>}\n   */\n  put(urls, options) {\n    return PermaCache.put(this, urls, options)\n  }\n\n  /**\n   * List all Perma cached URLs for this account. Use a `for await...of` loop to fetch them all.\n   * @example\n   * Fetch all the urls\n   * ```js\n   * const urls = []\n   * for await (const item of client.list()) {\n   *    urls.push(item)\n   * }\n   * ```\n   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for-await...of\n   * @param {ListOptions} [options]\n   * @returns {AsyncIterable<CacheEntry>}\n   */\n  list(options) {\n    return PermaCache.list(this, options)\n  }\n\n  /**\n   * @param {string[]} urls\n   * @param {DeleteOptions} [options]\n   * @returns {Promise<CacheDeleteResult[]>}\n   */\n  delete(urls, options) {\n    return PermaCache.delete(this, urls, options)\n  }\n\n  /**\n   * Fetch info on PermaCache for the user.\n   */\n  accountInfo() {\n    return PermaCache.accountInfo(this)\n  }\n}\n\n/**\n * Creates a rate limiter which limits at the same rate as is enforced\n * server-side, to allow the client to avoid exceeding the requests limit and\n * being blocked for 30 seconds.\n * @returns {RateLimiter}\n */\nexport function createRateLimiter() {\n  const throttle = throttledQueue(RATE_LIMIT_REQUESTS, RATE_LIMIT_PERIOD)\n  return () => throttle(() => {})\n}\n\n/**\n * Rate limiter used by static API if no rate limiter is passed. Note that each\n * instance of the PermaCache class gets it's own limiter if none is passed.\n * This is because rate limits are enforced per API token.\n */\nconst globalRateLimiter = createRateLimiter()\n\n/**\n * @param {string} urlString\n */\nfunction validateUrl(urlString) {\n  const url = new URL(urlString)\n  if (\n    !url.hostname.includes('.ipfs.nftstorage.link') &&\n    !(\n      url.hostname.includes('nftstorage.link') &&\n      url.pathname.startsWith('/ipfs')\n    )\n  ) {\n    throw new Error(\n      `Invalid URL (not an nftstorage.link IPFS URL): ${urlString}`\n    )\n  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