David Fencl
47 lines
1.6 KiB
TypeScript
47 lines
1.6 KiB
TypeScript
import axios from 'axios';
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import fs from 'fs';
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import https from 'https';
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import * as cheerio from 'cheerio';
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const URL = 'https://www.pvl.cz/portal/nadrze/cz/pc/Mereni.aspx?oid=1&id=VLL1';
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async function testPostback() {
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const agent = new https.Agent({ rejectUnauthorized: false });
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const res = await axios.get(URL, { httpsAgent: agent, timeout: 10000 });
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const $ = cheerio.load(res.data);
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const viewstate = $('#__VIEWSTATE').val();
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const viewstategenerator = $('#__VIEWSTATEGENERATOR').val();
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const eventvalidation = $('#__EVENTVALIDATION').val();
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// Try to POST for monthly data
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const postData = new URLSearchParams();
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postData.append('__EVENTTARGET', 'ctl00$ObsahCPH$PrechodNaBilancniData');
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postData.append('__EVENTARGUMENT', '');
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postData.append('__VIEWSTATE', viewstate as string);
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postData.append('__VIEWSTATEGENERATOR', viewstategenerator as string);
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postData.append('__EVENTVALIDATION', eventvalidation as string);
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const postRes = await axios.post(URL, postData.toString(), {
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httpsAgent: agent,
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headers: {
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'Content-Type': 'application/x-www-form-urlencoded'
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}
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});
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fs.writeFileSync('pvl_raw_month.html', postRes.data);
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console.log('Saved monthly data to pvl_raw_month.html');
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const $post = cheerio.load(postRes.data);
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const rows = $post('table.tabulka-seznam tr:not(:first-child)');
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console.log(`Found ${rows.length} rows in the table.`);
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if (rows.length > 0) {
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const firstRow = rows.first().find('td').first().text().trim();
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const lastRow = rows.last().find('td').first().text().trim();
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console.log(`Date range: ${firstRow} to ${lastRow}`);
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}
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}
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testPostback().catch(console.error);
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