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SearchBotWithDB.py
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SearchBotWithDB.py
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import urllib.request as request
import urllib.parse as parse
from urllib.error import URLError
import time
from email.mime.text import MIMEText
import smtplib
import boto3
import os
def lambda_handler(event, context):
PASSWORD = os.environ['PASSWORD']
SENDER = os.environ['SENDER']
# TODO implement
dynamodb = boto3.resource('dynamodb', region_name='us-west-1')
table = dynamodb.Table('SearchBotReceiver')
response = table.scan()['Items']
BotList = []
for BotArgs in response:
BotList.append(SearchBot([BotArgs['Condition']['Dept'] ,BotArgs['Condition']['Num']],
BotArgs['Condition']['In'],
BotArgs['Condition']['Ex'],
BotArgs['Condition']['Rstr'],
(SENDER ,PASSWORD ,BotArgs['Email'])))
for Bot in BotList:
Bot.runOnetime()
# Res = SearchBot(event['args'],event['include'],event['exclude'],event['rstr'],event['MailInfo'])
# Res.runOnetime()
class SearchBot:
ResultOnConsole = True
MAXTRY = 3600* 24 * 30 * 2
def __init__(self, CourseArgs, IncludeList=None, ExclueList=None, RstrList=None,
MailInfo: ('sender', 'Password', 'receiver') = None,
gap=1):
self._CheckRstr = False
self._CheckIn = False
self._CheckEx = False
self._args = CourseArgs
assert MailInfo == None or len(MailInfo) == 3
self._Mail = MailInfo
self._gap = gap
if RstrList != None:
self._CheckRstr = True
self._Rstr = RstrList
if IncludeList != None:
self._CheckIn = True
self._in = IncludeList
elif ExclueList != None:
self._CheckEx = True
self._ex = ExclueList
def _request(self):
paralib = parse.parse_qs(
'YearTerm=2017-92&ShowComments=on&ShowFinals=on&Breadth=ANY&Dept=I%26C+SCI&CourseNum=46&Division=ANY&CourseCodes=&InstrName=&CourseTitle=&ClassType=ALL&Units=&Days=&StartTime=&EndTime=&MaxCap=&FullCourses=ANY&FontSize=100&CancelledCourses=Exclude&Bldg=&Room=&Submit=Display+Web+Results',
True)
for key, value in paralib.items():
paralib[key] = value[0]
paralib['Dept'] = self._args[0]
paralib['CourseNum'] = self._args[1]
self._args = paralib
para = parse.urlencode(self._args)
para = para.encode("utf8")
htRes = request.Request("https://www.reg.uci.edu/perl/WebSoc", data=para)
txtRes = request.urlopen(htRes)
txtRes = txtRes.read().decode("utf8")
return txtRes
def _encodeMail(self, subject, context):
res = MIMEText(context)
res["Subject"] = subject
res["From"] = self._Mail[0]
res["To"] = self._Mail[2]
return res
def _sendMail(self, msg):
ser = smtplib.SMTP("smtp.gmail.com")
ser.starttls()
ser.login(self._Mail[0], self._Mail[1])
ser.send_message(msg)
ser.quit()
def _RstrCheck(self, line):
Rstr = line.split('</td>')[13][len('<td nowrap="nowrap">'):]
if 'and' in Rstr:
Rstr = Rstr.split(' and ')
for i in Rstr:
if i in self._Rstr:
return False
return True
def _analyse(self, msg):
msg = msg.split('\n')
courses = []
for line in msg:
if line.lstrip().startswith('<tr valign="top">') or line.lstrip().startswith(
'<tr valign="top" bgcolor="#FFFFCC">'):
courses.append(line)
success = []
if self._CheckIn:
for line in courses:
start = line.index('nowrap="nowrap">')
courseCode = line[start + len('nowrap="nowrap">'):start + len('nowrap="nowrap">') + 5]
if courseCode in self._in:
if 'OPEN' in line:
if not self._CheckRstr or self._RstrCheck(line):
success.append(courseCode)
else:
for line in courses:
start = line.index('nowrap="nowrap">')
courseCode = line[start + len('nowrap="nowrap">'):start + len('nowrap="nowrap">') + 5]
if courseCode not in self._ex:
if 'OPEN' in line:
if not self._CheckRstr or self._RstrCheck(line):
success.append(courseCode)
return success
def runOnetime(self):
sendnote = True if self._Mail != None else False
if self.ResultOnConsole:
print("Begin to Check " + str(self._args) + " for " + self._Mail[2])
while True:
try:
webMsg = self._request()
except URLError:
if self.ResultOnConsole:
print("Connection Error, Reconnecting...")
else:
break
Res = self._analyse(webMsg)
if self.ResultOnConsole:
for course in Res:
print('{} is OPEN!!'.format(course))
if len(Res) != 0 and sendnote:
msgList = ['{} is OPEN!!'.format(i) for i in Res]
msg = self._encodeMail("Your course is available!!", '\n'.join(msgList))
self._sendMail(msg)
return Res
def run(self):
sendnote = True if self._Mail != None else False
lastsent = 0
count = 1
while True:
if self.ResultOnConsole:
print("Trying to find course for {} time(s)...".format(count))
while True:
try:
webMsg = self._request()
except URLError:
if self.ResultOnConsole:
print("Connection Error, Reconnecting...")
time.sleep(1)
else:
break
Res = self._analyse(webMsg)
if self.ResultOnConsole:
for course in Res:
print('{} is OPEN!!'.format(course))
if len(Res) != 0 and sendnote:
if count - lastsent >= 10 * 50 or lastsent == 0:
lastsent = count
msgList = ['{} is OPEN!!'.format(i) for i in Res]
msg = self._encodeMail("Your course is available!!", '\n'.join(msgList))
self._sendMail(msg)
count += 1
if count >= self.MAXTRY:
if self.ResultOnConsole:
print('MAXTRY, BOT STOP')
break
time.sleep(1)