80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
import { Document } from "@langchain/core/documents";
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import { BaseDocumentLoader, } from "@langchain/core/document_loaders/base";
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import Browserbase from "@browserbasehq/sdk";
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/**
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* Load pre-rendered web pages using a headless browser hosted on Browserbase.
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*
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* Depends on `@browserbasehq/sdk` package.
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* Get your API key from https://browserbase.com
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*
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* @example
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* ```typescript
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* import { BrowserbaseLoader } from "langchain/document_loaders/web/browserbase";
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*
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* const loader = new BrowserbaseLoader(["https://example.com"], {
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* apiKey: process.env.BROWSERBASE_API_KEY,
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* textContent: true,
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* });
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*
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* const docs = await loader.load();
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* ```
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*
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* @param {string[]} urls - The URLs of the web pages to load.
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* @param {BrowserbaseLoaderOptions} [options] - Browserbase client options.
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*/
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export class BrowserbaseLoader extends BaseDocumentLoader {
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constructor(urls, options = {}) {
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super();
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Object.defineProperty(this, "urls", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: void 0
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});
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Object.defineProperty(this, "options", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: void 0
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});
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Object.defineProperty(this, "browserbase", {
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enumerable: true,
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configurable: true,
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writable: true,
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value: void 0
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});
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this.urls = urls;
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this.options = options;
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this.browserbase = new Browserbase(options);
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}
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/**
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* Load pages from URLs.
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*
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* @returns {Promise<DocumentInterface[]>} - A promise which resolves to a list of documents.
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*/
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async load() {
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const documents = [];
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for await (const doc of this.lazyLoad()) {
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documents.push(doc);
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}
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return documents;
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}
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/**
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* Load pages from URLs.
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*
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* @returns {Generator<DocumentInterface>} - A generator that yields documents.
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*/
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async *lazyLoad() {
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const pages = await this.browserbase.loadURLs(this.urls, this.options);
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let index = 0;
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for await (const page of pages) {
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yield new Document({
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pageContent: page,
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metadata: {
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url: this.urls[index],
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},
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});
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index += index + 1;
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}
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}
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}
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