/usr/share/doc/python-tornado-doc/examples/blog/blog.py is in python-tornado-doc 4.4.3-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 | #!/usr/bin/env python
#
# Copyright 2009 Facebook
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import bcrypt
import concurrent.futures
import MySQLdb
import markdown
import os.path
import re
import subprocess
import torndb
import tornado.escape
from tornado import gen
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import unicodedata
from tornado.options import define, options
define("port", default=8888, help="run on the given port", type=int)
define("mysql_host", default="127.0.0.1:3306", help="blog database host")
define("mysql_database", default="blog", help="blog database name")
define("mysql_user", default="blog", help="blog database user")
define("mysql_password", default="blog", help="blog database password")
# A thread pool to be used for password hashing with bcrypt.
executor = concurrent.futures.ThreadPoolExecutor(2)
class Application(tornado.web.Application):
def __init__(self):
handlers = [
(r"/", HomeHandler),
(r"/archive", ArchiveHandler),
(r"/feed", FeedHandler),
(r"/entry/([^/]+)", EntryHandler),
(r"/compose", ComposeHandler),
(r"/auth/create", AuthCreateHandler),
(r"/auth/login", AuthLoginHandler),
(r"/auth/logout", AuthLogoutHandler),
]
settings = dict(
blog_title=u"Tornado Blog",
template_path=os.path.join(os.path.dirname(__file__), "templates"),
static_path=os.path.join(os.path.dirname(__file__), "static"),
ui_modules={"Entry": EntryModule},
xsrf_cookies=True,
cookie_secret="__TODO:_GENERATE_YOUR_OWN_RANDOM_VALUE_HERE__",
login_url="/auth/login",
debug=True,
)
super(Application, self).__init__(handlers, **settings)
# Have one global connection to the blog DB across all handlers
self.db = torndb.Connection(
host=options.mysql_host, database=options.mysql_database,
user=options.mysql_user, password=options.mysql_password)
self.maybe_create_tables()
def maybe_create_tables(self):
try:
self.db.get("SELECT COUNT(*) from entries;")
except MySQLdb.ProgrammingError:
subprocess.check_call(['mysql',
'--host=' + options.mysql_host,
'--database=' + options.mysql_database,
'--user=' + options.mysql_user,
'--password=' + options.mysql_password],
stdin=open('schema.sql'))
class BaseHandler(tornado.web.RequestHandler):
@property
def db(self):
return self.application.db
def get_current_user(self):
user_id = self.get_secure_cookie("blogdemo_user")
if not user_id: return None
return self.db.get("SELECT * FROM authors WHERE id = %s", int(user_id))
def any_author_exists(self):
return bool(self.db.get("SELECT * FROM authors LIMIT 1"))
class HomeHandler(BaseHandler):
def get(self):
entries = self.db.query("SELECT * FROM entries ORDER BY published "
"DESC LIMIT 5")
if not entries:
self.redirect("/compose")
return
self.render("home.html", entries=entries)
class EntryHandler(BaseHandler):
def get(self, slug):
entry = self.db.get("SELECT * FROM entries WHERE slug = %s", slug)
if not entry: raise tornado.web.HTTPError(404)
self.render("entry.html", entry=entry)
class ArchiveHandler(BaseHandler):
def get(self):
entries = self.db.query("SELECT * FROM entries ORDER BY published "
"DESC")
self.render("archive.html", entries=entries)
class FeedHandler(BaseHandler):
def get(self):
entries = self.db.query("SELECT * FROM entries ORDER BY published "
"DESC LIMIT 10")
self.set_header("Content-Type", "application/atom+xml")
self.render("feed.xml", entries=entries)
class ComposeHandler(BaseHandler):
@tornado.web.authenticated
def get(self):
id = self.get_argument("id", None)
entry = None
if id:
entry = self.db.get("SELECT * FROM entries WHERE id = %s", int(id))
self.render("compose.html", entry=entry)
@tornado.web.authenticated
def post(self):
id = self.get_argument("id", None)
title = self.get_argument("title")
text = self.get_argument("markdown")
html = markdown.markdown(text)
if id:
entry = self.db.get("SELECT * FROM entries WHERE id = %s", int(id))
if not entry: raise tornado.web.HTTPError(404)
slug = entry.slug
self.db.execute(
"UPDATE entries SET title = %s, markdown = %s, html = %s "
"WHERE id = %s", title, text, html, int(id))
else:
slug = unicodedata.normalize("NFKD", title).encode(
"ascii", "ignore")
slug = re.sub(r"[^\w]+", " ", slug)
slug = "-".join(slug.lower().strip().split())
if not slug: slug = "entry"
while True:
e = self.db.get("SELECT * FROM entries WHERE slug = %s", slug)
if not e: break
slug += "-2"
self.db.execute(
"INSERT INTO entries (author_id,title,slug,markdown,html,"
"published) VALUES (%s,%s,%s,%s,%s,UTC_TIMESTAMP())",
self.current_user.id, title, slug, text, html)
self.redirect("/entry/" + slug)
class AuthCreateHandler(BaseHandler):
def get(self):
self.render("create_author.html")
@gen.coroutine
def post(self):
if self.any_author_exists():
raise tornado.web.HTTPError(400, "author already created")
hashed_password = yield executor.submit(
bcrypt.hashpw, tornado.escape.utf8(self.get_argument("password")),
bcrypt.gensalt())
author_id = self.db.execute(
"INSERT INTO authors (email, name, hashed_password) "
"VALUES (%s, %s, %s)",
self.get_argument("email"), self.get_argument("name"),
hashed_password)
self.set_secure_cookie("blogdemo_user", str(author_id))
self.redirect(self.get_argument("next", "/"))
class AuthLoginHandler(BaseHandler):
def get(self):
# If there are no authors, redirect to the account creation page.
if not self.any_author_exists():
self.redirect("/auth/create")
else:
self.render("login.html", error=None)
@gen.coroutine
def post(self):
author = self.db.get("SELECT * FROM authors WHERE email = %s",
self.get_argument("email"))
if not author:
self.render("login.html", error="email not found")
return
hashed_password = yield executor.submit(
bcrypt.hashpw, tornado.escape.utf8(self.get_argument("password")),
tornado.escape.utf8(author.hashed_password))
if hashed_password == author.hashed_password:
self.set_secure_cookie("blogdemo_user", str(author.id))
self.redirect(self.get_argument("next", "/"))
else:
self.render("login.html", error="incorrect password")
class AuthLogoutHandler(BaseHandler):
def get(self):
self.clear_cookie("blogdemo_user")
self.redirect(self.get_argument("next", "/"))
class EntryModule(tornado.web.UIModule):
def render(self, entry):
return self.render_string("modules/entry.html", entry=entry)
def main():
tornado.options.parse_command_line()
http_server = tornado.httpserver.HTTPServer(Application())
http_server.listen(options.port)
tornado.ioloop.IOLoop.current().start()
if __name__ == "__main__":
main()
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