script.py

import datetime
from time import sleep
import requests
import smtplib


"""

    To send email you need to follow these steps:
        1. Go to your google account settings.
        2. Now go to the security tab or section.
        3. From there go the app passwords.
        4. Now generate a password for gmail and window device.
        5. Now use your email id and generated password for send mail. 


"""


SMTP_EMAIL =  # Add email address here.
SMTP_PASSWORD =  # Add password here generated by following the above steps.


def findSlot(pincodes, age, email):
    result = ""
    slot_available = 0
    for pincode in pincodes:
        date_object = datetime.date.today()
        date = f"{date_object.day}-{date_object.month}-{date_object.year}"
        url = f"https://cdn-api.co-vin.in/api/v2/appointment/sessions/public/calendarByPin?pincode={pincode}&date={date}"
        payload = {}
        headers = {
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36'
        }
        response = requests.request("GET", url, headers=headers, data=payload)
        try:
            if response.ok:
                response_json = response.json()
                if response_json["centers"]:
                    for center in response_json["centers"]:
                        for session in center["sessions"]:
                            if (session["min_age_limit"] <= age and session["available_capacity"] > 0):
                                result = result + \
                                    f'Address: {center["address"]}\nState: {center["state_name"]}\nDistrict: {center["district_name"]}\nPincode: {center["pincode"]}\nFee Type:  {center["fee_type"]}\nvaccine: {session["vaccine"]}\nslots: {session["slots"]}\nDate: {session["date"]}\nAvailable slots capacity:  {session["available_capacity"]}\n\n\n'
                                slot_available += 1
            else:
                print(response.raise_for_status())
                return
        except Exception as e:
            print(e)
            return

    if not slot_available:
        print("No vaccination slot available currently.")
    else:
        send_mail(result, email)


def send_mail(info, email):
    server = smtplib.SMTP("smtp.gmail.com")
    server.ehlo()
    server.starttls()
    server.ehlo()

    server.login(SMTP_EMAIL, SMTP_PASSWORD)
    subject = "Slot available for vaccination"
    body = f"Go to COWIN Offical Website https://www.cowin.gov.in and book a slot as fast as possible.\n\nInformation\n\n{info}"
    msg = f"Subject:{subject}\n\n{body}"
    server.sendmail(
        SMTP_EMAIL,
        email,
        msg
    )
    print("Slot Available!! \nEmail has been sent to notify user about slot availability.")
    server.quit()


def main():
    print('\n\n ---After every 30-sec vaccination slots are checked for availability--- \n\n')
    email = input(
        "Enter your email address to get notified about the slot availability: ")
    pincodes = input(
        "Enter pin codes of districts separated by spaces for which you want to get notified for slot availability: ").split()
    age = int(input("Enter age: "))
    while (1):
        findSlot(pincodes, age, email)
        print("Rechecking...")
        sleep(30)


if __name__ == "__main__":
    main()