Building Web Applications with Flask

Italo Maia

• Éditeur: Packt Publishing
• Année: 2015
• ISBN:
  9781784396152
• Édition: 1
• Sujet: Ciencia de la computación
• Sous-sujet: Programación web

Building Web Applications with Flask

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Table of Contents

Building Web Applications with Flask

Credits

About the Author

About the Reviewers

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Why subscribe?

Free access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Flask in a Flask, I Mean, Book

An introduction to Flask and its features

Summary

2. First App, How Hard Could it Be?

Hello World

Prerequisites and tools

Setting up a virtual environment

Understanding the "Hello World" app

Serving HTML pages

Summary

3. Man, Do I Like Templates!

What is Jinja2 and how is it coupled with Flask?

What can you do with Jinja2?

Control structures

Macros

Extensions

Filters

Messing with the template context

Summary

4. Please Fill in This Form, Madam

HTML forms for the faint of heart

Handling forms

WTForms and you

Flask-WTF

Integration with WTForms

Securing forms with a CSRF token

Challenges

Summary

5. Where Do You Store Your Stuff?

SQLAlchemy

Concepts

Hands on

Flask-SQLAlchemy

MongoDB

MongoEngine

Flask-MongoEngine

Relational versus NoSQL

Summary

6. But I Wanna REST Mom, Now!

Beyond GET

Flask-Restless

Summary

7. If Ain't Tested, It Ain't Game, Bro!

What kinds of test are there?

Unit testing

Behavior testing

Flask-testing

LiveServer

Extra assertions

JSON handle

Fixtures

Extra – integration testing

Summary

8. Tips and Tricks or Flask Wizardry 101

Overengineering

Premature optimization

Blueprints 101

Oh God, please tell me you have the logs…

Debugging, DebugToolbar, and happiness

Flask-DebugToolbar

Sessions or storing user data between requests

Exercise

Summary

9. Extensions, How I Love Thee

How to configure extensions

Flask-Principal and Flask-Login (aka Batman and Robin)

Admin like a boss

Custom pages

Summary

10. What Now?

You deploy better than my ex

Placing your code in a server

Setting up your database

Setting up the web server

StackOverflow

Structuring your projects

Summary

Postscript

Index

Building Web Applications with Flask

Copyright © 2015 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: June 2015

Production reference: 1240615

Published by Packt Publishing Ltd.

Livery Place

35 Livery Street

Birmingham B3 2PB, UK.

ISBN 978-1-78439-615-2

www.packtpub.com

Credits

Author

Italo Maia

Reviewers

Glenn ten Cate

Michel Henrique Aquino Santos

Commissioning Editor

Nadeem N. Bagban

Acquisition Editor

Harsha Bharwani

Content Development Editor

Shubhangi Dhamgaye

Technical Editor

Shruti Rawool

Copy Editors

Stephen Copestake

Swati Priya

Project Coordinator

Bijal Patel

Proofreader

Safis Editing

Indexer

Mariammal Chettiyar

Production Coordinator

Nilesh R. Mohite

Cover Work

Nilesh R. Mohite

About the Author

Italo Maia is a full-stack developer with 10 years of experience in creating software for the mobile, Web, and desktop environments, having dedicated most of the last few years to development with Python and web technologies.

Author of Flask-Empty, a popular skeleton for Flask projects that aggregates good practices and recipes for quick prototyping, he is active in the Brazilian Python communities, having open source tools and libraries available in GitHub and Bitbucket.

Building Web Applications with Flask is a book written with the invaluable support of families—the Packt family, where I give special thanks to Shubhangi for her dedication and patience with puny little me, and my own family, who so tenderly have looked out for me in my time of need.

About the Reviewers

Glenn ten Cate has over 10 years of experience in the field of security as a coder, hacker, speaker, trainer, and security researcher. He is currently employed as a security engineer at Schuberg Philis in the Netherlands, and has been a speaker at multiple security conferences. His goal is to create an open source software development life cycle approach with the tools and knowledge gathered over the years.

Michel Henrique Aquino Santos is a software engineer with Gravity4. A Brazilian from Belo Horizonte, Minas Gerais, he is 26 years old. He graduated in computer science from the Federal University of Lavras (UFLA) in 2012.

He worked with the research department at the university for 2 years, developing artificial intelligence algorithms to solve optimization problems.

At the end of the course, he joined Tbit and started developing image processing algorithms using C#.

After his graduation, he joined SYDLE and worked with ASP.NET Web Forms using C#, JavaScript, and the MS SQL Server database. After that, he worked with Delphi and the MS SQL server database at Sociedade Mineira de Cultura.

In January 2014, he joined Ezlike, a start-up focused on creating, managing, and optimizing Facebook ads. In April 2015, Ezlike was acquired by the US-based company Gravity4 in order to incorporate a number of other tools focused on digital marketing. There, he works with ASP.NET MVC, JavaScript, AngularJS, KnockoutJS, MongoDB, MS SQL Server, and Cassandra using the Facebook Ads API.

He is also about to begin some personal projects using Python and developing for Android.

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This book is dedicated to my angel, my inspiration, and my light—my son, Miguel—who never fails to amaze me in his endeavors to become a fine young man or cheer up the family.

Preface

One can hardly develop new applications in our "now world" without duct-taping a lot of technologies together, be it new trend databases, messaging systems, or languages of all kinds. When talking about web dev...