实例介绍
【实例简介】
【实例截图】
【核心代码】
Table of Contents Preface vii Chapter 1: Creating Your First Flask Application 1 What is Flask? 1 With great freedom comes great responsibility 2 Setting up a development environment 2 Supporting Python 3 3 Installing Python packages 3 Installing pip 3 Installing virtualenv 4 Why use virtualenv? 4 Installing virtualenv with pip 4 Creating your first Flask app 5 Installing Flask in your virtualenv 6 Hello, Flask! 6 Understanding the code 7 Routes and requests 9 Reading values from the request 10 Debugging Flask applications 11 Introducing the blog project 14 The spec 15 Creating the blog project 15 A barebones Flask app 17 Zooming out 18 The import flow 19 Summary 20 Chapter 2: Relational Databases with SQLAlchemy 21 Why use a relational database? 22 Introducing SQLAlchemy 23 Installing SQLAlchemy 24 Table of Contents [ ii ] Using SQLAlchemy in our Flask app 24 Choosing a database engine 25 Connecting to the database 25 Creating the Entry model 26 Creating the Entry table 29 Working with the Entry model 30 Making changes to an existing entry 32 Deleting an entry 32 Retrieving blog entries 32 Filtering the list of entries 33 Special lookups 34 Combining expressions 35 Negation 36 Operator precedence 37 Building a tagging system 37 Adding and removing tags from entries 41 Using backrefs 42 Making changes to the schema 43 Adding Flask-Migrate to our project 43 Creating the initial migration 44 Adding a status column 45 Summary 46 Chapter 3: Templates and Views 47 Introducing Jinja2 48 Basic template operations 49 Loops, control structures, and template programming 51 Jinja2 built-in filters 55 Creating a base template for the blog 57 Creating a URL scheme 60 Defining the URL routes 62 Building the index view 63 Building the detail view 66 Listing entries matching a given tag 67 Listing all the tags 68 Full-text search 69 Adding pagination links 71 Enhancing the blog app 73 Summary 73 Table of Contents [ iii ] Chapter 4: Forms and Validation 75 Getting started with WTForms 75 Defining a form for the Entry model 76 A form with a view 77 The create.html template 78 Handling form submissions 80 Validating input and displaying error messages 82 Editing existing entries 85 The edit.html template 86 Deleting entries 89 Cleaning up 90 Using flash messages 91 Displaying flash messages in the template 93 Saving and modifying tags on posts 94 Image uploads 96 Processing file uploads 97 The image upload template 99 Serving static files 100 Summary 101 Chapter 5: Authenticating Users 103 Creating a user model 104 Installing Flask-Login 105 Implementing the Flask-Login interface 107 Creating user objects 108 Login and logout views 110 The login template 112 Logging out 113 Accessing the current user 114 Restricting access to views 114 Storing an entry's author 115 Setting the author on blog entries 117 Protecting the edit and delete views 117 Displaying a user's drafts 119 Sessions 120 Summary 121 Chapter 6: Building an Administrative Dashboard 123 Installing Flask-Admin 123 Adding Flask-Admin to our app 125 Table of Contents [ iv ] Exposing models through the Admin 126 Customizing the list views 129 Adding search and filtering to the list view 132 Customizing Admin model forms 134 Enhancing the User form 136 Generating slugs 138 Managing static assets via the Admin 140 Securing the admin website 141 Creating an authentication and authorization mixin 143 Setting up a custom index page 144 Flask-Admin templates 145 Reading more 146 Summary 146 Chapter 7: AJAX and RESTful APIs 147 Creating a comment model 147 Creating a schema migration 149 Installing Flask-Restless 149 Setting up Flask-Restless 150 Making API requests 151 Creating comments using AJAX 154 AJAX form submissions 156 Validating data in the API 159 Preprocessors and postprocessors 160 Loading comments using AJAX 161 Retrieving the list of comments 163 Reading more 166 Summary 166 Chapter 8: Testing Flask Apps 167 Unit testing 167 Python's unit test module 168 A simple math test 169 Flask and unit testing 171 Testing a page 173 Testing an API 175 Test-friendly configuration 176 Mocking objects 177 Table of Contents [ v ] Logging and error reporting 179 Logging 180 Logging to file 180 Custom log messages 181 Levels 181 Error reporting 182 Read more 182 Summary 182 Chapter 9: Excellent Extensions 183 SeaSurf and CSRF protection of forms 183 Creating Atom feeds 185 Syntax highlighting using Pygments 186 Simple editing with Markdown 190 Caching with Flask-Cache and Redis 192 Creating secure, stable versions of your site by creating static content 194 Commenting on a static site 195 Synchronizing multiple editors 195 Asynchronous tasks with Celery 196 Creating command line instructions with Flask-script 199 References 200 Summary 201 Chapter 10: Deploying Your Application 203 Running Flask with a WSGI server 203 Apache's httpd 204 Serving static files 206 Nginx 207 Serving static files 209 Gunicorn 210 Securing your site with SSL 210 Getting your certificate 211 Apache httpd 212 Nginx 214 Gunicorn 215 Automating deployment using Ansible 216 Read more 219 Summary 219 Index 221
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