Price checker for olympic tickets

gistfile1.md

1. Download grabber.py and settings.py.example. Rename the latter to settings.py and edit as appropriate for your local system.
2. git clone https://github.com/palfrey/urlgrab.git urlgrab
3. Run python grabber.py <event id> <max price> (where event id is from a page like http://www.tickets.london2012.com/eventdetails?id=000046BFAE4D12A7 and is that id field at the end)

You will now get emailed once a ticket becomes available at that price, and every time after that when prices drop further.

grabber.py

#!/usr/bin/python
# vim: set fileencoding=utf-8 :

from urlgrab import Cache
import email.mime, smtplib, email.mime.text
from settings import *
import re
from sys import argv
import time

id = argv[1]
limit = int(argv[2])

cache = Cache()
select = re.compile("<select id=\"price_category\"[^>]+>(.*?)</select>", re.MULTILINE | re.DOTALL)
option = re.compile("<option value=\"\d+\" price=\"(\d+)\"")

url = "http://www.tickets.london2012.com/eventdetails?id="+ id

best = None

while True:
	data = cache.get(url, max_age=60).read()
	selector = select.search(data)
	assert selector != None
	options = sorted([int(x) for x in option.findall(selector.groups()[0])])
	assert len(options) > 0, selector
	print time.asctime(), "cheapest", options[0], "wanted", limit, id
	if options[0] <= limit and (best == None or best > options[0]):
		msg = email.mime.Multipart.MIMEMultipart()
		msg["From"] = srcEmail
		msg["To"] = destEmail
		msg["Subject"] = "Cheaper olympic ticket"
		doc = email.mime.text.MIMEText("Cheaper price £%d at %s" %(options[0], url))
		msg.attach(doc)

		s = smtplib.SMTP(server, port)
		if username!= None:
			s.ehlo()
			s.starttls()
			s.ehlo()
			s.login(username, password)
		s.sendmail(srcEmail, destEmail, msg.as_string())
		s.close()
		best = options[0]
	time.sleep(300) # 5 minutes

settings.py.example

destEmail = "youremail@blah.com"
srcEmail = "an_allowed_email@example.com"

server = "smtp.gmail.com"
port = 587

username = None # set to a string to login 
password = None # set to a string to login