@nodecfdi/csf-pdf-scraper/dist/esm/scraper.js

Obtiene la constancia fiscal actual de una persona moral o física

import { createWriteStream } from 'node:fs';
import { pipeline } from 'node:stream';
import { promisify } from 'node:util';
import { HtmlForm, PortalRfcAmpcUrls } from '@nodecfdi/sat-scrapers-auth';
export default class Scraper {
    _portal;
    constructor(_portal) {
        this._portal = _portal;
    }
    async downloadAsBase64(once = true) {
        await this._portal.confirmSessionIsAlive();
        await this.generateConstancia();
        const response = this._portal.getHttpGateway().getStream(PortalRfcAmpcUrls.DownloadConstancia);
        const resultBase64 = await this.readStreamToBase64(response);
        if (once) {
            await this._portal.logout();
        }
        return resultBase64;
    }
    async downloadAsFile(targetPath, once = true) {
        await this._portal.confirmSessionIsAlive();
        await this.generateConstancia();
        const response = this._portal.getHttpGateway().getStream(PortalRfcAmpcUrls.DownloadConstancia);
        const streamPipeline = promisify(pipeline);
        await streamPipeline(response, createWriteStream(targetPath));
        if (once) {
            await this._portal.logout();
        }
    }
    async generateConstancia() {
        const satHttpGateway = this._portal.getHttpGateway();
        let foundedButtonGenerateConstancia = false;
        try {
            const htmlMainPage = await this._portal.getPortalMainPage();
            foundedButtonGenerateConstancia = htmlMainPage.includes('formReimpAcuse:j_idt50');
            const inputs = new HtmlForm(htmlMainPage, 'form').getFormValues();
            if (Object.keys(inputs).length > 0) {
                const request = {
                    ...inputs,
                    'javax.faces.partial.ajax': 'true',
                    'javax.faces.source': 'formReimpAcuse:j_idt50',
                    'javax.faces.partial.execute': '@all',
                    'formReimpAcuse:j_idt50': 'formReimpAcuse:j_idt50',
                };
                await satHttpGateway.postAjax(PortalRfcAmpcUrls.ConsultaTramite, PortalRfcAmpcUrls.ConsultaTramite, request);
            }
        }
        catch (error) {
            throw new AggregateError([error], 'Cannot generate constancia');
        }
        if (!foundedButtonGenerateConstancia) {
            throw new Error('Constancia not found');
        }
    }
    async readStreamToBase64(readStream) {
        return new Promise((resolve, reject) => {
            const chunks = [];
            readStream.on('data', (chunk) => {
                chunks.push(chunk);
            });
            readStream.on('end', () => {
                const buffer = Buffer.concat(chunks);
                const base64 = buffer.toString('base64');
                resolve(base64);
            });
            readStream.on('error', (err) => {
                reject(err);
            });
        });
    }
}