flask 项目的开发经验总结

# -*- coding: utf-8 -*-  
from __future__ import absolute_import
from __future__ import absolute_import
from app import app

app.run()

# -*- coding: utf-8 -*-  
from __future__ import absolute_import
import os
from datetime import timedelta
_basedir = os.path.abspath(os.path.dirname(__file__))

DEBUG = True

SECRET_KEY = os.urandom(24)
PERMANENT_SESSION_LIFETIME=timedelta(seconds=24*60*60)

CSRF_ENABLED = True
CSRF_SESSION_KEY = "somethingimpossibletoguess"

# -*- coding: utf-8 -*-  
from __future__ import absolute_import
from flask import Flask, g, render_template, send_from_directory
import os
import os.path
_basedir = os.path.abspath(os.path.dirname(__file__))
configPy=os.path.join(os.path.join( _basedir,os.path.pardir), ‘config.py‘)

app = Flask(__name__)  # create our application object

app.config.from_pyfile(configPy)
#app.debug=True  #change some attribute after load configuration


flask_sqlalchemy_used=True  # 如果使用Flask-SQLAlchemy了
db = SQLAlchemy(app) #create a db (SQLAlchemy) object from our app object

login_manager = LoginManager(app) #create a LoginManager Object from our app object
#add our view as the login view to finish configuring the LoginManager
login_manager.login_view = "users.login_view"

#register the users module blueprint
from app.users.views import mod as usersModule
app.register_blueprint(usersModule)


#register the tickets module blueprint
from app.tickets.views import mod as ticketsModule
app.register_blueprint(ticketsModule)


def connect_db():  # 如果没使用Flask-SQLAlchemy
    if not flask_sqlalchemy_used:
        return sqlite3.connect(‘/path/to/database.db‘)
    else:
        return None
    
                
@app.before_request
def before_request():
    """Make sure we are connected to the database each request."""
    if not flask_sqlalchemy_used:
        g.db = connect_db()


@app.after_request
def after_request(response):
    """Closes the database again at the end of the request."""
    if not flask_sqlalchemy_used:
        g.db.close()
    return response
    
            
#*****************
# controllers
#*****************

@app.route(‘/favicon.ico‘)
def favicon():
    return send_from_directory(os.path.join(app.root_path, ‘static‘), ‘ico/favicon.ico‘)

@app.errorhandler(404)
def page_not_found(e):
    return render_template(‘404.html‘), 404

@app.route("/")
def index():
    return render_template(‘index.html‘)

# -*- coding: utf-8 -*-  
from __future__ import absolute_import
from flask import Blueprint, render_template, flash, redirect, session, url_for, request, g
from flask.ext.login import login_user, logout_user, login_required
from app import app, db, login_manager
from forms import LoginForm, RegistrationForm
from app.users.models import User

mod = Blueprint(‘users‘, __name__) #register the users blueprint module

@login_manager.user_loader
def load_user(user_id):
    return User.query.get(user_id)

@mod.route(‘/login/‘, methods=(‘GET‘, ‘POST‘))
def login_view():
    form = LoginForm(request.form)
    if form.validate_on_submit():
        user = form.get_user()
        login_user(user)
        flash("Logged in successfully.")
        return redirect(request.args.get("next") or url_for("index"))
    return render_template(‘users/login.html‘, form=form)

@mod.route(‘/register/‘, methods=(‘GET‘, ‘POST‘))
def register_view():
    form = RegistrationForm(request.form)
    if form.validate_on_submit():
        user = User()
        form.populate_obj(user)
        db.session.add(user)   #使用SqlAlchemy保存
        db.session.commit()
        login_user(user)
        return redirect(url_for(‘index‘))
    return render_template(‘users/register.html‘, form=form)

@login_required
@mod.route(‘/logout/‘)
def logout_view():
    logout_user()
    return redirect(url_for(‘index‘))