/
helloworld.py
197 lines (172 loc) · 7.31 KB
/
helloworld.py
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import sys
import os
import webapp2
import jinja2
import hashlib
import hmac
import random
import string
from google.appengine.ext import db
template_dir = os.path.join(os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(loader = jinja2.FileSystemLoader(template_dir),
autoescape = True)
sys.path.append(os.path.join(os.path.dirname(__file__), 'lib'))
#imports for custom defined helpers
import valid_helpers
import auth_helpers
class Handler(webapp2.RequestHandler):
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
def render_str(self, template, **params):
t = jinja_env.get_template(template)
return t.render(params)
def render(self, template, **kw):
self.write(self.render_str(template, **kw))
class User(db.Model):
username = db.StringProperty(required = True)
email = db.StringProperty()
encrypted_pass = db.StringProperty(required = True)
class MainPage(Handler):
def get(self):
self.render("form.html")
def post(self):
user_month = self.request.get('month')
user_day = self.request.get('day')
user_year = self.request.get('year')
month = valid_helpers.valid_month(user_month)
day = valid_helpers.valid_day(user_day)
year = valid_helpers.valid_year(user_year)
if not(day and month and year):
self.render("form.html", error="Invalid data! Please re-enter",
day = user_day,
month = user_month,
year = user_year)
else:
self.write("Thanks")
class RotHandler(Handler):
def get(self):
self.render("rot_form.html")
def post(self):
self.render("rot_form.html",
placeholder = self.rot13(self.request.get("text")) )
def rot13(self, s):
alphabets = string.ascii_lowercase
i = 0
output = []
caps = False
while i < len(s):
if s[i].isupper():
caps = True
s_index = alphabets.find(s[i].lower())
else:
s_index = alphabets.find(s[i])
if s_index >= 0:
if caps:
output.append((alphabets[(s_index+13)%26]).upper())
else:
output.append(alphabets[(s_index+13)%26])
else:
output.append(s[i])
caps = False
i = i + 1
return "".join(output)
class SignupHandler(Handler):
def get(self):
self.render("signup_form.html")
def post(self):
have_error = False
user_username = self.request.get('username')
user_password = self.request.get('password')
user_verify = self.request.get('verify')
user_email = self.request.get('email')
check_username = valid_helpers.valid_username(user_username)
check_password = valid_helpers.valid_password(user_password)
check_verify = valid_helpers.valid_verify(user_verify, user_password)
check_email = valid_helpers.valid_email(user_email)
params = dict(user_username = user_username, user_email = user_email)
# Try to retrieve user from database if it already exits
query = User.all(keys_only = True).filter('username', user_username)
if not(check_username):
params['error_username'] = "That's not a valid username."
have_error = True
if not(check_password):
params['error_password'] = "That wasn't a valid password."
have_error = True
if not(check_verify):
params['error_verify'] = "Your passwords didn't match."
have_error = True
if not(check_email):
params['error_email'] = "That's not a valid email."
have_error = True
if not have_error:
# query database only if no other errors exist
existing_user = query.get()
if existing_user:
# if the user exists, the give error
params['error_username'] = "This user already exists"
have_error = True
if have_error:
self.render("signup_form.html", **params)
else:
#set cookies here and save user to database
#encrypt the pass before saving
encrypted_pass = auth_helpers.make_pw_hash(user_username, user_password)
user = User(username = user_username, email = user_email, encrypted_pass = encrypted_pass)
user.put() # save the user
existing_user = query.get() # get the user from the database
user_id = existing_user.id()
user_hash = auth_helpers.make_secure_val(str(user_id))
self.response.headers.add_header("Set-Cookie", "user = %s" % str(user_hash))
self.redirect("/unit3/welcome")
class WelcomeHandler(Handler):
def get(self):
user_cookie_hash = self.request.cookies.get("user")
if user_cookie_hash:
user_identified = auth_helpers.check_secure_val(user_cookie_hash)
if user_identified:
user = User.get_by_id(int(user_identified))
self.write("<h2>Welcome, %s" % user.username)
else:
self.redirect("/signup")
else:
self.redirect("/signup")
class LoginHandler(Handler):
def get(self):
self.render("login.html")
def post(self):
user_username = self.request.get('username')
user_password = self.request.get('password')
params = dict(username = user_username)
query = User.all().filter('username', user_username)
user = query.get()
if user:
check_user = auth_helpers.valid_pw(user_username, user_password, user.encrypted_pass)
if check_user:
#set cookie and redirect to welcome page
user_id = user.key().id()
user_hash = auth_helpers.make_secure_val(str(user_id))
self.response.headers.add_header("Set-Cookie", "user = %s" % str(user_hash))
self.redirect("/unit3/welcome")
else:
params["error_username"] = "Invalid login"
params["error_password"] = " "
self.render("login.html", **params)
else:
params["error_username"] = "Invalid login"
params["error_password"] = " "
self.render("login.html", **params)
class LogoutHandler(Handler):
def get(self):
user_cookie_hash = self.request.cookies.get("user")
if user_cookie_hash:
# deleting the cookie by setting it to nothing
self.response.headers.add_header('Set-Cookie', 'user=; Path=/')
self.redirect("/signup")
else:
self.redirect("/signup")
app = webapp2.WSGIApplication([('/', MainPage),
('/unit2/rot13', RotHandler),
('/signup', SignupHandler),
('/login', LoginHandler),
('/logout', LogoutHandler),
('/unit3/welcome', WelcomeHandler)], debug=True)