Add ticketing.py
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#!/usr/bin/python3
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# Simple event ticketing system
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# Generate QR codes, share to attendees
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# Each ticket can be used only once
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import random, string, qrcode, os.path, time, re
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from pathlib import Path
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from flask import Flask, request, escape
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# Domain name for the service
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domain = "v-space.hu"
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# Generate QR code and save to file
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def gen_qr(qdata, qid):
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data = qdata
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filename = qid + ".png"
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img = qrcode.make(data)
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img.save(filename)
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# Generate random string
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def random_string(length):
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letters = string.ascii_lowercase
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return ''.join(random.choice(letters) for i in range(length))
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# Burn QR (filename touch with _burned)
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def burn_qr(ticket):
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# Allow burning only when event starts, https://time.is/Unix_time_converter
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now = int( time.time() )
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if now < 1670223600:
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return "The time has not come yet."
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# Burning if the event is open
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ticket = str(ticket)
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if os.path.exists(ticket+".png"+"_burned") == True:
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return "Problem: you can't reuse tickets! Call the organizers if you think this is a mistake or incident."
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if os.path.exists(ticket+".png") == True:
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Path(ticket+".png"+"_burned").touch()
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print(ticket + " burned!")
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# Idea: add NFT minting here
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return "Ticket burned, get you swagz! Welcome to PMC!"
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else:
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print("Ticket NOT found!")
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return "Ticket NOT found!"
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# Generate the tickets and save them to tickets.txt
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def generate_tickets(amount):
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ticket_file = open("tickets.txt", "w")
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for x in range(amount):
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rand_val = random_string(16)
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# Save logs
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ticket_val = "https://" + domain + "/ticket?id=" + rand_val
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print("Ticket: " + ticket_val)
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ticket_file.write(ticket_val + " \n")
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# Generate the QR code image files
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gen_qr(ticket_val, rand_val)
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ticket_file.close()
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# Cleanup ticketing system
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# TODO, dangerously removing all files listed in tickets.txt, needs validation/verification/etc
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#def ticket_cleanup():
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# surely = input("Are you sure you want to remove all .png, _burned and tickets.txt files from this directory? [y/n] ")
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# if surely == "y":
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# import subprocess
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# ticket_file = open("tickets.txt", "r")
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# Lines = ticket_file.readlines()
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# for line in Lines:
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# line = line.strip()
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# subprocess.run(["rm", line])
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# line = line + "_burned"
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# subprocess.run(["rm", line])
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# subprocess.run(["rm", "tickets.txt"])
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generate_tickets(100)
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# Web service
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app = Flask(__name__)
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@app.route('/ticket',methods=['GET'])
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def r00t():
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ticket_id = escape(request.args.get('id'))
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ticket_id = re.sub('[^a-zA-Z0-9]', '', ticket_id) # Whitelist based XSS Protection
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try:
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return "<html><body><h2>PMC ticketing system, click to <a href=\"/ticket/burn?id=" + ticket_id + "\">burn</a>!</h2></body></html>"
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except:
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return "PMC ticketing system: id missing from parameter."
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@app.route('/ticket/burn',methods=['GET'])
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def burn():
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burn_id = request.args.get('id')
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return "<html><body><h2>" + burn_qr(burn_id) + "</h2></body></html>"
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if __name__ == '__main__':
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app.run(debug=False,host='127.0.0.1', port=8686)
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# Functionalities for testing / alternatively: API
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# random_string(16)
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# gen_qr("test")
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# generate_tickets(5)
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# burn_qr("123456789")
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# ticket_cleanup()
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