Mastering Flask电子书

Mastering Flask

Table of Contents

Mastering Flask

Credits

About the Author

About the Reviewers

www.PacktPub.com

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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. Getting Started

Version control with Git

Installing Git

Git on Windows

Git basics

Python package management with pip

Installing the pip Python package manager on Windows

Installing the pip Python package manager on Mac OS X and Linux

pip basics

Dependency sandboxing with virtualenv

virtualenv basics

The beginning of our project

Using Flask Script

Summary

2. Creating Models with SQLAlchemy

Setting up SQLAlchemy

Python packages

Flask SQLAlchemy

Our first model

Creating the user table

CRUD

Creating models

Reading models

Filtering queries

Updating models

Deleting models

Relationships between models

One-to-many

Many-to-many

The convenience of SQLAlchemy sessions

Database migrations with Alembic

Summary

3. Creating Views with Templates

Jinja's syntax

Filters

default

escape

float

int

join

length

round

safe

title

tojson

truncate

Custom filters

Comments

if statements

Loops

Macros

Flask-specific variables and functions

config

request

session

url_for()

get_flashed_messages()

Creating our views

The view function

Writing the templates and inheritance

The home page template

Writing the other templates

Flask WTForms

WTForms basics

Custom validators

Posting comments

Summary

4. Creating Controllers with Blueprints

Request setup, teardown, and application globals

Error pages

Class-based views

Method class views

Blueprints

Summary

5. Advanced Application Structure

The project as a module

Refactoring the code

Application factories

Summary

6. Securing Your App

Setting up

Updating the models

Creating the forms

Protecting your form from spam with reCAPTCHA

Creating views

Social logins

OpenID

Facebook

Twitter

Using the session

Flask Login

User roles

Summary

7. Using NoSQL with Flask

Types of NoSQL databases

Key-value stores

Document stores

Column family stores

Graph databases

RDBMS versus NoSQL

The strengths of RDBMS databases

Data safety

Speed and scale

Tools

The strengths of NoSQL databases

What database to use when

MongoDB in Flask

Installing MongoDB

Setting Up MongoEngine

Defining documents

Field types

Types of documents

The meta attribute

CRUD

Create

Write safety

Read

Filtering

Update

Delete

Relationships in NoSQL

One-to-many relationships

Many-to-many relationships

Leveraging the power of NoSQL

Summary

8. Building RESTful APIs

What is REST

Setting up a RESTful Flask API

GET requests

Output formatting

Request arguments

POST requests

Authentication

PUT requests

DELETE requests

Summary

9. Creating Asynchronous Tasks with Celery

What is Celery?

Setting up Celery and RabbitMQ

Creating tasks in Celery

Running Celery tasks

Celery workflows

Partials

Callbacks

Group

Chain

Chord

Running tasks periodically

Monitoring Celery

Web-based monitoring with Flower

Creating a reminder app

Creating a weekly digest

Summary

10. Useful Flask Extensions

Flask Script

Flask Debug Toolbar

Flask Cache

Caching views and functions

Caching functions with parameters

Caching routes with query strings

Using Redis as a cache backend

Using memcached as a cache backend

Flask Assets

Flask Admin

Creating basic admin pages

Creating database admin pages

Enhancing the post's administration

Creating file system admin pages

Securing Flask Admin

Flask Mail

Summary

11. Building Your Own Extension

Creating a YouTube Flask extension

Creating a Python package

Modifying the response with Flask extensions

Summary

12. Testing Flask Apps

What are unit tests?

How does testing work?

Unit testing the application

Testing the route functions

User interface testing

Test coverage

Test-driven development

Summary

13. Deploying Flask Apps

Deploying on your own server

Pushing code to your server with fabric

Running your web server with supervisor

Gevent

Tornado

Nginx and uWSGI

Apache and uWSGI

Deploying on Heroku

Using Heroku Postgres

Using Celery on Heroku

Deploying on Amazon web services

Using Flask on Amazon Elastic Beanstalk

Using Amazon Relational Database Service

Using Celery with Amazon Simple Queue Service

Summary

Index