Site parsing. How to find a POST request on the site after clicking the "send" button?

Question

Parsing

I am writing a program in python to parse a website.
schroederindustries.info/CrossReference.aspx


I have an array of values ​​that I need to enter one by one into the search box, press the search button and parse the result. The site uses POST requests that I can't catch.
I need a line generating a POST request in order to parse the desired results in a loop.
Please help me calculate this line.
If it does not work out, then you will have to parse through Selenium.

Answer 1

what to calculate there, POST is done to the same page
F12 > network > Preserve log

__EVENTTARGET: 
__EVENTARGUMENT: 
__LASTFOCUS: 
__VIEWSTATE: ........
__VIEWSTATEGENERATOR: 0470EB9F
__EVENTVALIDATION: ..........
ctl00%24ContentPlaceHolder1%24OEMSearch: uuuuuuuuuuuuu
ctl00%24ContentPlaceHolder1%24OEMSearchbtn: Search
ctl00%24ContentPlaceHolder1%24OEMDistinct:

(() => {
  const body = new FormData(document.forms.form1)
  body.set('ctl00$ContentPlaceHolder1$OEMSearch', 'te')

  fetch('./CrossReference.aspx', {
    method: 'POST',
    body,
  }).then(r => r.text()).then(console.log)
})()

Answer 2

Press F12