and the Werkzeug [https://www.palletsprojects.com/p/werkzeug/] WSGI toolkit. The documentation for these libraries can be found at: Jinja documentation [http://jinja.pocoo.org/docs] Werkzeug documentation documentation [https://werkzeug.palletsprojects.com/] User’s Guide This part of the documentation, which is mostly prose, begins with some background information about Flask, then focuses on step-by-step instructions These distributions will be installed automatically when installing Flask. Werkzeug [https://palletsprojects.com/p/werkzeug/] implements WSGI, the standard Python interface between applications and servers

depends on the Jinja template engine and the Werkzeug WSGI toolkit. The documentation for these libraries can be found at: • Jinja documentation • Werkzeug documentation CONTENTS 1 Flask Documentation 3.2 Dependencies These distributions will be installed automatically when installing Flask. • Werkzeug implements WSGI, the standard Python interface between applications and servers. • Jinja is a template Documentation (1.1.x), Release 1.1.4 More information on using the debugger can be found in the Werkzeug documentation. Have another debugger in mind? See Working with Debuggers. 1.4.4 Routing Modern

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT Add a new task $ curl http://localhost:5000/todos after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT Add a new task $ curl http://localhost:5000/todos after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT Add a new task $ curl http://localhost:5000/todos after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

GitHub 上是 Star 数量最多的 Python Web 框架，没有之一。 Flask 是典型的微框架，作为 Web 框架来说，它仅保留了核心功能：请求响应处理 和模板渲染。这两类功能分别由 Werkzeug（WSGI 工具库）完成和 Jinja（模板渲 染库）完成，因为 Flask 包装了这两个依赖，我们暂时不用深入了解它们。 主页 这一章的主要任务就是为我们的程序编写一个简单的主页。主页的 Flask 的依赖 Werkzeug 内置了用于生成和验证密码散列值的函 数， werkzeug.security.generate_password_hash() 用来为给定的密码生成 密码散列值，而 werkzeug.security.check_password_hash() 则用来检查给 定的散列值和密码是否对应。使用示例如下所示： >>> from werkzeug.security 模型类添加 username 字段和 password_hash 字段，分别用来存储登录所需的用户名和密码散列值，同时添加两个方法来实现设 置密码和验证密码的功能： from werkzeug.security import generate_password_hash, check_pass word_hash class User(db.Model): id = db

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT 8 Chapter 1. User’s Guide Flask-RESTful after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

Flask-RESTful Documentation, Release 0.3.6 < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT Add a new task $ curl http://localhost:5000/todos after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT 8 Chapter 1. User’s Guide Flask-RESTful after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something

after body < HTTP/1.0 204 NO CONTENT < Content-Type: application/json < Content-Length: 0 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:10:32 GMT 8 Chapter 1. User’s Guide Flask-RESTful after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 25 < Server: Werkzeug/0.8.3 Python/2.7.2 < Date: Mon, 01 Oct 2012 22:12:58 GMT < * Closing connection #0 {"task": "something after body < HTTP/1.0 201 CREATED < Content-Type: application/json < Content-Length: 27 < Server: Werkzeug/0.8.3 Python/2.7.3 < Date: Mon, 01 Oct 2012 22:13:00 GMT < * Closing connection #0 {"task": "something