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main.py
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main.py
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import os, time, codecs, time, logging
import webapp2, urllib, cgi, json
from jinja2 import Environment, FileSystemLoader
from google.appengine.api import memcache
from google.appengine.ext import db
from model import Users, Post, PageContent, PageHistory
import util
env = Environment(loader=FileSystemLoader(os.path.join(os.path.dirname(__file__), "templates")),
autoescape=True)
class BaseHandler(webapp2.RequestHandler):
def render(self, template, **kw):
self.response.out.write(self.render_str(template, **kw))
def render_str(self, template, **params):
t = env.get_template(template)
return t.render(params)
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
class Welcome(BaseHandler):
def get(self):
user_id = self.request.cookies.get('user_id', False)
user = Users.get_by_id(int(user_id))
if user_id:
self.render('welcome.html', username = user.name)
else:
self.render('signup.html')
class FrontPage(BaseHandler):
def get(self):
posts = memcache.get('top')
query_time = memcache.get('time')
if posts is not None:
self.render("home.html", posts = posts, query_time = int(time.time() - query_time))
else:
posts = db.GqlQuery("select * from Post order by created desc limit 10")
memcache.set('time', time.time())
memcache.set('top', posts)
self.render("home.html", posts = posts, query_time = '0')
class SubmitPage(BaseHandler):
def render_page(self, error = "", subject="", content=""):
self.render("submit.html", error = error, subject = subject, content = content)
def get(self):
self.render_page()
def post(self):
subject = self.request.get("subject")
content = self.request.get("content")
if subject and content:
post = Post(subject = subject, content = content)
post.put()
memcache.set('time', time.time())
post_id = post.key().id()
self.redirect("/%i" % post_id)
else:
error = "both subject and content required to post"
self.render_page(error = error, subject = subject, content = content)
class PermaPage(BaseHandler):
def get(self, post_id):
post = Post.get_by_id(int(post_id))
query_time = memcache.get('time')
self.render('perma.html', post = post, query_time = int(time.time() - query_time))
class FlushHandler(BaseHandler):
def get(self):
memcache.flush_all()
self.redirect('/')
class JsonHandler(BaseHandler):
def get(self, *post_id):
self.response.headers['Content-Type'] = 'application/json; charset=UTF-8'
if post_id:
post = Post.get_by_id(int(post_id[0]))
self.write(json.dumps(post.to_dict()))
else:
posts_query = Post.all().order('-created')
posts = posts_query.fetch(10)
self.write(json.dumps([p.to_dict() for p in posts]))
class Rot13(BaseHandler):
def get(self):
self.render('rot13.html')
def post(self):
text = self.request.get('text')
if text:
self.render('rot13.html', text = codecs.encode(text, 'rot13'))
class SignUp(BaseHandler):
def get(self):
user_id = self.request.cookies.get('user_id')
if user_id:
self.redirect('/')
else:
self.render('signup.html')
def post(self):
errors = {}
# Get all values from signup form
username = self.request.get("username")
password = self.request.get("password")
verify = self.request.get("verify")
email = self.request.get("email")
# Validate form data and return errors if invalid
if not util.valid_username(username):
errors["userError"] = "That isn't a valid username."
if not util.valid_password(password):
errors["passwordError"] = "That isn't a valid password."
if not verify == password:
errors["verifyError"] = "Your passwords don't match."
if not util.valid_email(email):
errors["emailError"] = "That isn't a valid email."
# If errors exist render the page with the errors
# If no errors exist redirect to welcome page
if errors:
errors["userValue"] = username
errors["emailValue"] = email
self.render('signup.html', **errors)
else:
# Create the user entity with validated data
if email:
user = Users(name = username, password = password, email = email)
else:
user = Users(name = username, password = password)
user.put()
# Generate a cookie storing user_id
self.response.headers.add_header('Set-Cookie', 'user_id=%s; Path=/' % str(user.key().id()))
#self.render('/wikihome.html', home="active", logged_in=True)
self.redirect('/')
class Login(BaseHandler):
def get(self):
user_id = self.request.cookies.get('user_id')
if user_id:
self.redirect('/')
else:
self.render('login.html', login = "active")
def post(self):
# Get all values from signup form
username = self.request.get("username")
password = self.request.get("password")
# Query DB for existing username
userInDB = Users.gql("where name = :1", username).get()
# If the username matches the DB query
if userInDB:
# Query DB to match password to username
userPassword = Users.gql("where password = :1", password).get()
# If the password matches, set cookie with user_id and redirect to welcome screen
if userPassword:
# Generate a cookie storing user_id
self.response.headers.add_header('Set-Cookie', 'user_id=%s; Path=/' % str(userInDB.key().id()))
self.redirect("/")
# Throw error if password doesn't match
else:
error = "The username or password is incorrect."
self.render('login.html', login = "active", error = error)
# If the username doesn't match the DB query
else:
error = "The username or password is incorrect."
self.render('login.html', login = "active", error = error)
class Logout(BaseHandler):
def get(self):
self.response.headers.add_header('Set-Cookie', 'user_id=''; Path=/')
self.redirect('/')
class WikiHome(BaseHandler):
def get(self):
user_id = self.request.cookies.get('user_id')
if user_id:
#user = Users.get_by_id(int(user_id))
self.render('wikihome.html', home="active", logged_in=True, display_edit="none")
else:
self.render('wikihome.html', home="active", logged_in=False)
class WikiPage(BaseHandler):
def get(self, path):
user_id = self.request.cookies.get('user_id')
if user_id:
cached_page = memcache.get(path[1:])
if cached_page:
page = cached_page
else:
page = PageContent.all().filter("title =", path).get()
if page:
memcache.add(page.title, page)
self.render('wikipage.html', logged_in=True, path=path[1:], content=page.content)
else:
self.render('wikipage.html', path = path[1:], logged_in=True, edit=True, display_edit="none")
else:
self.redirect('/')
def post(self, path):
content = self.request.get('content')
page = PageContent(title=path, content=content)
page.put()
self.render('wikipage.html', logged_in=True, path=path[1:], content=page.content)
class EditPage(BaseHandler):
def get(self, path):
user_id = self.request.cookies.get('user_id')
# Redirect back to home of no page title is in url
if path == '/':
self.redirect('/')
if user_id:
# Check if page in db
page = PageContent.all().filter("title =", path).get()
if page:
self.render('wikipage.html', path = path[1:], logged_in=True, edit=True, display_edit="none", content=page.content)
else:
self.render('wikipage.html', path = path[1:], logged_in=True, edit=True, display_edit="none")
else:
self.redirect('/')
def post(self, path):
page = PageContent.all().filter("title =", path).get()
content = self.request.get('content')
page.content = content
page.put()
self.redirect(page.title)
PAGE_RE = r'(/(?:[a-zA-Z0-9_-]+/?)*)'
app = webapp2.WSGIApplication([('/signup/?', SignUp),
('/welcome/?', Welcome),
('/login/?', Login),
('/logout/?', Logout),
('/blog/?', FrontPage),
('/([0-9]+)/?', PermaPage),
('/newpost/?', SubmitPage),
('/flush/?', FlushHandler),
('/.json', JsonHandler),
('/([0-9]+)/?.json', JsonHandler),
('/rot13/?', Rot13),
('/_edit' + PAGE_RE, EditPage),
('/', WikiHome),
(PAGE_RE, WikiPage),
],
debug=True)
def main():
run_wsgi_app(app)
if __name__ == '__main__':
main()