dtamind-components
Version:
Apps integration for Dtamind. Contain Nodes and Credentials.
260 lines • 11 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const lodash_1 = require("lodash");
const playwright_1 = require("@langchain/community/document_loaders/web/playwright");
const linkifyjs_1 = require("linkifyjs");
const src_1 = require("../../../src");
class Playwright_DocumentLoaders {
constructor() {
this.label = 'Playwright Web Scraper';
this.name = 'playwrightWebScraper';
this.version = 2.0;
this.type = 'Document';
this.icon = 'playwright.svg';
this.category = 'Document Loaders';
this.description = `Load data from webpages`;
this.baseClasses = [this.type];
this.inputs = [
{
label: 'URL',
name: 'url',
type: 'string'
},
{
label: 'Text Splitter',
name: 'textSplitter',
type: 'TextSplitter',
optional: true
},
{
label: 'Get Relative Links Method',
name: 'relativeLinksMethod',
type: 'options',
description: 'Select a method to retrieve relative links',
options: [
{
label: 'Web Crawl',
name: 'webCrawl',
description: 'Crawl relative links from HTML URL'
},
{
label: 'Scrape XML Sitemap',
name: 'scrapeXMLSitemap',
description: 'Scrape relative links from XML sitemap URL'
}
],
default: 'webCrawl',
optional: true,
additionalParams: true
},
{
label: 'Get Relative Links Limit',
name: 'limit',
type: 'number',
optional: true,
default: '10',
additionalParams: true,
description: 'Only used when "Get Relative Links Method" is selected. Set 0 to retrieve all relative links, default limit is 10.',
warning: `Retrieving all links might take long time, and all links will be upserted again if the flow's state changed (eg: different URL, chunk size, etc)`
},
{
label: 'Wait Until',
name: 'waitUntilGoToOption',
type: 'options',
description: 'Select a go to wait until option',
options: [
{
label: 'Load',
name: 'load',
description: 'Consider operation to be finished when the load event is fired.'
},
{
label: 'DOM Content Loaded',
name: 'domcontentloaded',
description: 'Consider operation to be finished when the DOMContentLoaded event is fired.'
},
{
label: 'Network Idle',
name: 'networkidle',
description: 'Navigation is finished when there are no more connections for at least 500 ms.'
},
{
label: 'Commit',
name: 'commit',
description: 'Consider operation to be finished when network response is received and the document started loading.'
}
],
optional: true,
additionalParams: true
},
{
label: 'Wait for selector to load',
name: 'waitForSelector',
type: 'string',
optional: true,
additionalParams: true,
description: 'CSS selectors like .div or #div'
},
{
label: 'Additional Metadata',
name: 'metadata',
type: 'json',
description: 'Additional metadata to be added to the extracted documents',
optional: true,
additionalParams: true
},
{
label: 'Omit Metadata Keys',
name: 'omitMetadataKeys',
type: 'string',
rows: 4,
description: 'Each document loader comes with a default set of metadata keys that are extracted from the document. You can use this field to omit some of the default metadata keys. The value should be a list of keys, seperated by comma. Use * to omit all metadata keys execept the ones you specify in the Additional Metadata field',
placeholder: 'key1, key2, key3.nestedKey1',
optional: true,
additionalParams: true
}
];
this.outputs = [
{
label: 'Document',
name: 'document',
description: 'Array of document objects containing metadata and pageContent',
baseClasses: [...this.baseClasses, 'json']
},
{
label: 'Text',
name: 'text',
description: 'Concatenated string from pageContent of documents',
baseClasses: ['string', 'json']
}
];
}
async init(nodeData, _, options) {
const textSplitter = nodeData.inputs?.textSplitter;
const metadata = nodeData.inputs?.metadata;
const relativeLinksMethod = nodeData.inputs?.relativeLinksMethod;
const selectedLinks = nodeData.inputs?.selectedLinks;
let limit = parseInt(nodeData.inputs?.limit);
let waitUntilGoToOption = nodeData.inputs?.waitUntilGoToOption;
let waitForSelector = nodeData.inputs?.waitForSelector;
const _omitMetadataKeys = nodeData.inputs?.omitMetadataKeys;
const output = nodeData.outputs?.output;
const orgId = options.orgId;
let omitMetadataKeys = [];
if (_omitMetadataKeys) {
omitMetadataKeys = _omitMetadataKeys.split(',').map((key) => key.trim());
}
let url = nodeData.inputs?.url;
url = url.trim();
if (!(0, linkifyjs_1.test)(url)) {
throw new Error('Invalid URL');
}
async function playwrightLoader(url) {
try {
let docs = [];
const config = {
launchOptions: {
args: ['--no-sandbox'],
headless: true
}
};
if (waitUntilGoToOption) {
config['gotoOptions'] = {
waitUntil: waitUntilGoToOption
};
}
if (waitForSelector) {
config['evaluate'] = async (page, _) => {
await page.waitForSelector(waitForSelector);
const result = await page.evaluate(() => document.body.innerHTML);
return result;
};
}
const loader = new playwright_1.PlaywrightWebBaseLoader(url, config);
if (textSplitter) {
docs = await loader.load();
docs = await textSplitter.splitDocuments(docs);
}
else {
docs = await loader.load();
}
return docs;
}
catch (err) {
if (process.env.DEBUG === 'true')
options.logger.error(`[${orgId}]: Error in PlaywrightWebBaseLoader: ${err.message}, on page: ${url}`);
}
}
let docs = [];
if (relativeLinksMethod) {
if (process.env.DEBUG === 'true')
options.logger.info(`[${orgId}]: Start PlaywrightWebBaseLoader ${relativeLinksMethod}`);
// if limit is 0 we don't want it to default to 10 so we check explicitly for null or undefined
// so when limit is 0 we can fetch all the links
if (limit === null || limit === undefined)
limit = 10;
else if (limit < 0)
throw new Error('Limit cannot be less than 0');
const pages = selectedLinks && selectedLinks.length > 0
? selectedLinks.slice(0, limit === 0 ? undefined : limit)
: relativeLinksMethod === 'webCrawl'
? await (0, src_1.webCrawl)(url, limit)
: await (0, src_1.xmlScrape)(url, limit);
if (process.env.DEBUG === 'true')
options.logger.info(`[${orgId}]: PlaywrightWebBaseLoader pages: ${JSON.stringify(pages)}, length: ${pages.length}`);
if (!pages || pages.length === 0)
throw new Error('No relative links found');
for (const page of pages) {
docs.push(...(await playwrightLoader(page)));
}
if (process.env.DEBUG === 'true')
options.logger.info(`[${orgId}]: Finish PlaywrightWebBaseLoader ${relativeLinksMethod}`);
}
else if (selectedLinks && selectedLinks.length > 0) {
if (process.env.DEBUG === 'true')
options.logger.info(`[${orgId}]: PlaywrightWebBaseLoader pages: ${JSON.stringify(selectedLinks)}, length: ${selectedLinks.length}`);
for (const page of selectedLinks.slice(0, limit)) {
docs.push(...(await playwrightLoader(page)));
}
}
else {
docs = await playwrightLoader(url);
}
if (metadata) {
const parsedMetadata = typeof metadata === 'object' ? metadata : JSON.parse(metadata);
docs = docs.map((doc) => ({
...doc,
metadata: _omitMetadataKeys === '*'
? {
...parsedMetadata
}
: (0, lodash_1.omit)({
...doc.metadata,
...parsedMetadata
}, omitMetadataKeys)
}));
}
else {
docs = docs.map((doc) => ({
...doc,
metadata: _omitMetadataKeys === '*'
? {}
: (0, lodash_1.omit)({
...doc.metadata
}, omitMetadataKeys)
}));
}
if (output === 'document') {
return docs;
}
else {
let finaltext = '';
for (const doc of docs) {
finaltext += `${doc.pageContent}\n`;
}
return (0, src_1.handleEscapeCharacters)(finaltext, false);
}
}
}
module.exports = { nodeClass: Playwright_DocumentLoaders };
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