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dori-udacity-cs253.py
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dori-udacity-cs253.py
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import os
import re
from string import letters
import webapp2
import jinja2
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)
def render_str(template, **params):
t = jinja_env.get_template(template)
return t.render(params)
class BlogHandler(webapp2.RequestHandler):
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
def render_str(self, template, **params):
return render_str(template, **params)
def render(self, template, **kw):
self.write(self.render_str(template, **kw))
def render_post(response, post):
response.out.write('<b>' + post.subject + '</b><br>')
response.out.write(post.content)
class MainPage(BlogHandler):
def get(self):
self.write('Hello, Udacity!')
##### blog stuff
def blog_key(name = 'default'):
return db.Key.from_path('blogs', name)
class Post(db.Model):
subject = db.StringProperty(required = True)
content = db.TextProperty(required = True)
created = db.DateTimeProperty(auto_now_add = True)
last_modified = db.DateTimeProperty(auto_now = True)
def render(self):
self._render_text = self.content.replace('\n', '<br>')
return render_str("post.html", p = self)
class BlogFront(BlogHandler):
def get(self):
posts = db.GqlQuery("select * from Post order by created desc limit 10")
self.render('front.html', posts = posts)
class PostPage(BlogHandler):
def get(self, post_id):
key = db.Key.from_path('Post', int(post_id), parent=blog_key())
post = db.get(key)
if not post:
self.error(404)
return
self.render("permalink.html", post = post)
class NewPost(BlogHandler):
def get(self):
self.render("newpost.html")
def post(self):
subject = self.request.get('subject')
content = self.request.get('content')
if subject and content:
p = Post(parent = blog_key(), subject = subject, content = content)
p.put()
self.redirect('/blog/%s' % str(p.key().id()))
else:
error = "subject and content, please!"
self.render("newpost.html", subject=subject, content=content, error=error)
###### Unit 2 HW's
class Rot13(BlogHandler):
def get(self):
self.render('rot13-form.html')
def post(self):
rot13 = ''
text = self.request.get('text')
if text:
rot13 = text.encode('rot13')
self.render('rot13-form.html', text = rot13)
USER_RE = re.compile(r"^[a-zA-Z0-9_-]{3,20}$")
def valid_username(username):
return username and USER_RE.match(username)
PASS_RE = re.compile(r"^.{3,20}$")
def valid_password(password):
return password and PASS_RE.match(password)
EMAIL_RE = re.compile(r'^[\S]+@[\S]+\.[\S]+$')
def valid_email(email):
return not email or EMAIL_RE.match(email)
class Signup(BlogHandler):
def get(self):
self.render("signup-form.html")
def post(self):
have_error = False
username = self.request.get('username')
password = self.request.get('password')
verify = self.request.get('verify')
email = self.request.get('email')
params = dict(username = username,
email = email)
if not valid_username(username):
params['error_username'] = "That's not a valid username."
have_error = True
if not valid_password(password):
params['error_password'] = "That wasn't a valid password."
have_error = True
elif password != verify:
params['error_verify'] = "Your passwords didn't match."
have_error = True
if not valid_email(email):
params['error_email'] = "That's not a valid email."
have_error = True
if have_error:
self.render('signup-form.html', **params)
else:
self.redirect('/unit2/welcome?username=' + username)
class Welcome(BlogHandler):
def get(self):
username = self.request.get('username')
if valid_username(username):
self.render('welcome.html', username = username)
else:
self.redirect('/unit2/signup')
app = webapp2.WSGIApplication([('/', MainPage),
('/unit2/rot13', Rot13),
('/unit2/signup', Signup),
('/unit2/welcome', Welcome),
('/blog/?', BlogFront),
('/blog/([0-9]+)', PostPage),
('/blog/newpost', NewPost),
],
debug=True)