Create gstin_scraper.py

Hello owners, this is just a small and beautiful script (pun intended) that demonstrates use of beautifulSoup to extract practical data.

GSTIN, short for Goods and Services Tax Identification Number, is a unique 15 digit identification number assigned to every taxpayer (primarily dealer or supplier or any business entity) registered under the GST regime in INDIA.

I created this script back in 2021, when one of my brother required this for his startup business and today when I saw this repo and it's inclusiveness for all sorts of crazy python script I desired to include this crazy adventure of mine.

Although the original version was bit messier but I refactored it according to current best standards.

Hope for a positive commity commity.

Thank you so much,
Purshotam Bohra

Author: PBJI

gstin_scraper.py

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+from bs4 import BeautifulSoup
+import requests
+import time
+
+# Script Name		: gstin_scraper.py
+# Author				: Purshotam
+# Created				: Sep 6, 2021 7:59 PM
+# Last Modified		: Oct 3, 2023 6:28 PM
+# Version				: 1.0
+# Modifications		:
+""" Description	:
+GSTIN, short for Goods and Services Tax Identification Number, 
+is a unique 15 digit identification number assigned to every taxpayer 
+(primarily dealer or supplier or any business entity) registered under the GST regime.
+This script is able to fetch GSTIN numbers for any company registered in the
+Mumbai / Banglore region.
+"""
+
+
+# Using a demo list in case of testing the script. 
+# This list will be used in case user skips "company input" dialogue by pressing enter.
+demo_companies = ["Bank of Baroda", "Trident Limited", "Reliance Limited", "The Yummy Treat", "Yes Bank", "Mumbai Mineral Trading Corporation"]
+
+def get_company_list():
+    company_list = []
+    
+    while True:
+        company = input("Enter a company name (or press Enter to finish): ")
+        if not company:
+            break
+        company_list.append(company)
+    
+    return company_list
+
+def fetch_gstins(company_name, csrf_token):
+    third_party_gstin_site = "https://www.knowyourgst.com/gst-number-search/by-name-pan/"
+    payload = {'gstnum': company_name, 'csrfmiddlewaretoken': csrf_token}
+
+    # Getting the HTML content and extracting the GSTIN content using BeautifulSoup.
+    html_content = requests.post(third_party_gstin_site, data=payload)
+    soup = BeautifulSoup(html_content.text, 'html.parser')
+    site_results = soup.find_all(id="searchresult")
+
+    # Extracting GSTIN specific values from child elements.
+    gstins = [result.strong.next_sibling.next_sibling.string for result in site_results]
+
+    return gstins
+
+def main():
+    temp = get_company_list()
+    companies = temp if temp else demo_companies
+
+    all_gstin_data = ""
+    third_party_gstin_site = "https://www.knowyourgst.com/gst-number-search/by-name-pan/"
+
+    # Getting the CSRF value for further RESTful calls.
+    page_with_csrf = requests.get(third_party_gstin_site)
+    soup = BeautifulSoup(page_with_csrf.text, 'html.parser')
+    csrf_token = soup.find('input', {"name": "csrfmiddlewaretoken"})['value']
+
+    for company in companies:
+        gstins = fetch_gstins(company, csrf_token)
+
+        # Only include GSTINs for Bengaluru and Mumbai-based companies
+        comma_separated_gstins = ', '.join([g for g in gstins if g.startswith(('27', '29'))])
+
+        all_gstin_data += f"{company} = {comma_separated_gstins}\n\n"
+
+        # Delaying for false DDOS alerts on the third-party site
+        time.sleep(0.5)
+
+    # Printing the data
+    print(all_gstin_data)
+
+if __name__ == "__main__":
+    main()