65 lines
2.1 KiB
TypeScript
65 lines
2.1 KiB
TypeScript
import { INode, INodeData, INodeParams } from '../../../src/Interface'
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import { TextSplitter } from 'langchain/text_splitter'
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import { CheerioWebBaseLoader } from 'langchain/document_loaders/web/cheerio'
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class Cheerio_DocumentLoaders implements INode {
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label: string
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name: string
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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inputs: INodeParams[]
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constructor() {
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this.label = 'Cheerio Web Scraper'
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this.name = 'cheerioWebScraper'
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this.type = 'Document'
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this.icon = 'cheerio.svg'
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this.category = 'Document Loaders'
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this.description = `Load data from webpages`
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this.baseClasses = [this.type]
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this.inputs = [
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{
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label: 'URL',
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name: 'url',
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type: 'string'
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},
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{
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label: 'Text Splitter',
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name: 'textSplitter',
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type: 'TextSplitter',
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optional: true
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}
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]
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}
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async init(nodeData: INodeData): Promise<any> {
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const textSplitter = nodeData.inputs?.textSplitter as TextSplitter
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let url = nodeData.inputs?.url as string
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var urlPattern = new RegExp(
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'^(https?:\\/\\/)?' + // validate protocol
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'((([a-z\\d]([a-z\\d-]*[a-z\\d])*)\\.)+[a-z]{2,}|' + // validate domain name
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'((\\d{1,3}\\.){3}\\d{1,3}))' + // validate OR ip (v4) address
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'(\\:\\d+)?(\\/[-a-z\\d%_.~+]*)*' + // validate port and path
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'(\\?[;&a-z\\d%_.~+=-]*)?' + // validate query string
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'(\\#[-a-z\\d_]*)?$',
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'i'
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) // validate fragment locator
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const loader = new CheerioWebBaseLoader(urlPattern.test(url.trim()) ? url.trim() : '')
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if (textSplitter) {
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const docs = await loader.loadAndSplit(textSplitter)
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return docs
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} else {
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const docs = await loader.load()
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return docs
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}
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}
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}
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module.exports = { nodeClass: Cheerio_DocumentLoaders }
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