85 lines
2.9 KiB
JavaScript
85 lines
2.9 KiB
JavaScript
|
import { Spider } from "@spider-cloud/spider-client";
|
||
|
|
import { Document } from "@langchain/core/documents";
|
||
|
|
import { getEnvironmentVariable } from "@langchain/core/utils/env";
|
||
|
|
import { BaseDocumentLoader } from "@langchain/core/document_loaders/base";
|
||
|
|
/**
|
||
|
|
* Class representing a document loader for loading data from
|
||
|
|
* Spider (spider.cloud). It extends the BaseDocumentLoader class.
|
||
|
|
* @example
|
||
|
|
* ```typescript
|
||
|
|
* const loader = new SpiderLoader({
|
||
|
|
* url: "{url}",
|
||
|
|
* apiKey: "{apiKey}",
|
||
|
|
* mode: "crawl"
|
||
|
|
* });
|
||
|
|
* const docs = await loader.load();
|
||
|
|
* ```
|
||
|
|
*/
|
||
|
|
export class SpiderLoader extends BaseDocumentLoader {
|
||
|
|
constructor(loaderParams) {
|
||
|
|
super();
|
||
|
|
Object.defineProperty(this, "apiKey", {
|
||
|
|
enumerable: true,
|
||
|
|
configurable: true,
|
||
|
|
writable: true,
|
||
|
|
value: void 0
|
||
|
|
});
|
||
|
|
Object.defineProperty(this, "url", {
|
||
|
|
enumerable: true,
|
||
|
|
configurable: true,
|
||
|
|
writable: true,
|
||
|
|
value: void 0
|
||
|
|
});
|
||
|
|
Object.defineProperty(this, "mode", {
|
||
|
|
enumerable: true,
|
||
|
|
configurable: true,
|
||
|
|
writable: true,
|
||
|
|
value: void 0
|
||
|
|
});
|
||
|
|
Object.defineProperty(this, "params", {
|
||
|
|
enumerable: true,
|
||
|
|
configurable: true,
|
||
|
|
writable: true,
|
||
|
|
value: void 0
|
||
|
|
});
|
||
|
|
const { apiKey = getEnvironmentVariable("SPIDER_API_KEY"), url, mode = "scrape", params, } = loaderParams;
|
||
|
|
if (!apiKey) {
|
||
|
|
throw new Error("Spider API key not set. You can set it as SPIDER_API_KEY in your .env file, or pass it to Spider.");
|
||
|
|
}
|
||
|
|
this.apiKey = apiKey;
|
||
|
|
this.url = url;
|
||
|
|
this.mode = mode;
|
||
|
|
this.params = params || { metadata: true, return_format: "markdown" };
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Loads the data from the Spider.
|
||
|
|
* @returns An array of Documents representing the retrieved data.
|
||
|
|
* @throws An error if the data could not be loaded.
|
||
|
|
*/
|
||
|
|
async load() {
|
||
|
|
const app = new Spider({ apiKey: this.apiKey });
|
||
|
|
let spiderDocs;
|
||
|
|
if (this.mode === "scrape") {
|
||
|
|
const response = await app.scrapeUrl(this.url, this.params);
|
||
|
|
if (response.error) {
|
||
|
|
throw new Error(`Spider: Failed to scrape URL. Error: ${response.error}`);
|
||
|
|
}
|
||
|
|
spiderDocs = response;
|
||
|
|
}
|
||
|
|
else if (this.mode === "crawl") {
|
||
|
|
const response = await app.crawlUrl(this.url, this.params);
|
||
|
|
if (response.error) {
|
||
|
|
throw new Error(`Spider: Failed to crawl URL. Error: ${response.error}`);
|
||
|
|
}
|
||
|
|
spiderDocs = response;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
throw new Error(`Unrecognized mode '${this.mode}'. Expected one of 'crawl', 'scrape'.`);
|
||
|
|
}
|
||
|
|
return spiderDocs.map((doc) => new Document({
|
||
|
|
pageContent: doc.content || "",
|
||
|
|
metadata: doc.metadata || {},
|
||
|
|
}));
|
||
|
|
}
|
||
|
|
}
|