Guava

Guava is a super lightweight and high performance web framework for Python written in C. It is totally different with other traditional Python web frameworks.

Keep in mind, this project is not to revent the wheel.

If you don't like the features Guava supplied, you can use the underlying structures like router, session, request, response, builtin web server to construct your own web framework with the benifits of high performance which guava gives you.

You can check out the detailed explaination of guava in my blog. Link

Status

1. Active development

I will release the stable version ASAP.

Anyways, you can evaluate it, hack it in advance. Don't forget to star it if you think guava can help you in the future. :)

If you want to contribute, please see the contribution section.

Philosophy of Guava

1. High performance
2. Prefer convention over configuration
3. Lightweight, only do what one web framework should do
4. Scalability

Main Features

1. Asynchorous, build on top of libuv
2. Builtin HTTP webserver
3. Builtin routers: Router, StaticRouter, MVCRouter, RESTFulRouter
4. Session Management: InMemory, Local FileSystem, Remote(SSO)
5. Everything is extensible

Performance

I did a quick performance testing, all codes are stored in benchmark folder.

If anything is not correct, please kindly to correct me.

Testing Environment

EC2: t2.micro 1CPU 0.613GIB EBS

OS: Ubuntu14.04

Benchmark program: wrk

1. Helloworld Performance

Command: wrk -t12 -c400 -d30s http://127.0.0.1:8000/

This runs a benchmark for 30 seconds, using 12 threads, and keeping 400 HTTP connections open.

Already disabled al

Framework	Requests/s	Notes
Flask	595.73	Actually failed to run the full testing
CherryPy	1627.68
Tornado	3373.22
NodeJS Raw	4977.63
Go Raw	20230.32
guava	18799.11

The reason why this time of testing guava didn't win Go is due to some known but unfixed bugs in guava, I will fix that soon and rerun the testing.

After I finished basic features, I will focus on the optimization part, continously to improve the performance.

To be honest, there're lots of places in guava could be optimized.

Deployment

Deploy behind of Nginx/Apache

------------                                ----------------------
| WebServer | <<-- Reversed Proxy Rule -->> | Guava HTTP Server |
------------                                ----------------------

No Nginx/Apache

The performance of the Guava builtin web server is good enough for serving as the standalone web server. But till now I haven't spend so much time on the security part, so maybe it's not the best time to choose this kind of deployment.

Router

Guava has four builtin routers trying to simplify your life. For detailed documentation, please refer to the doc directory in this repo.

Each router has one mount point. All routers will composite the tree like structures. The concept of mount point is for you easily group you sub applications.

StaticRouter

StaticRouter is dedicated for serving static resources, for example: css, javascript files or images.

static_router = guava.router.StaticRouter(mount_point="/static",
                                          directory="my_static_dir",
                                          allow_index=True)

MVCRouter

This could be set as the default router, if your application is such a typical one.

mvc_router = guava.router.MVCRouter(mount_point="/")

For exmaple:

URL	Package	Class	Module	Action	Args	GET	POST
/	controllers	IndexController	index	index	()	{}	{}
/post	controllers	IndexController	post	index	()	{}	{}
/post/new	controllers	IndexController	post	new	()	{}	{}
/post/view/10	controllers	IndexController	post	view	('10',)	{}	{}
/post/move/10/20	controllers	IndexController	post	move	('10', '20',)	{}	{}
/post/edit/10?type=draft	controllers	IndexController	post	edit	('10', )	{'type': 'draft'}	{}

RESTRouter

This router is especially useful if you want to supply the RESTFul apis.

Method	URL	Class	Action
GET	/users	UsersController	get_all
GET	/users/10	UsersController	get_one
DELETE	/users/10	UsersController	delete_one
POST	/users/	UsersController	create_one
PUT	/users/10	UsersController	update_one

I havn't find the best way to handler subresource like this kind of urls /users/10/friends/, after I get a better idea, I will integrate with this feature soon.

Customerize or implement advanced router

If above routers can not match all of your requirements, you can use CustomRouter to build or overwrite complex routes

custom_router = guava.router.Router({
	"/about": guava.handler.Handler(package='.',
                                    module='misc',
                                    controller='MiscController',
                                    action='about')
})

class MySpecialRouter(guava.router.Router):

    def __init__(self):
		self.register('/hello',
		              guava.handler.Handler(package='.',
                                            module='misc',
                                            controller='MiscController',
                                            action='hello'))

	def route(self, req):
		if req.path == '/me' and req.GET['name'] == 'rock':
			return guava.handler.Handler(package='.',
                                         module='me',
                                         controller='MeController',
                                         action='show')

		return None

Controller

All your controllers should inherit from guava.controller.Controller.

Session

Guava already builtin two kinds of Session store solutions, one is in memory store, the other is file based store. If you want to support SSO and try to store session in MC, Redis or databases, you need to create a new class inherited from the builtin session store.

InMemory Store

This is specially useful for debugging purpose. Each time you restarted the guava web server, all data in this kind of session store will be dropped.

session_store = guava.session.SessionStore(type=guava.session.Mem)

File Based Store

session_store = guava.session.SessionStore(type=guava.session.File)

Custom the Session Store

If you want to implement the SSO, you need the central based session storage solution by using Redis, memcache, database or other brokers to store the session data.

class RedisSessionStore(guava.session.SessionStore):

    def __init__(self, *args, **kwargs)):
        super(MySessionStore, self).__init__(*args, **kwargs)

	def set(self, sid, value):
        pass

	def get(self, sid):
        pass

	def delete(self, sid):
        pass

	def clear(self, sid):
        pass

You need to implement the four placeholder functions to build your own session store solution.

Dependencies

Project	Description
libuv	Cross-platform asychronous I/O library
http-parser	http request/response parser for c

Install

Install from Git

git submodule update --init

sudo python setup.py install

Run tests: python -m unittest discover

Install from github using pip

sudo pip install -e git+https://github.com/flatpeach/guava.git#egg=guava

Install from PyPI

sudo pip install guava

Quick Usage Tricks

1. Launch a web server at current directory

   python -c 'import guava; guava.server.start_static_server()'

   It's the same as

   python -m SimpleHTTPServer

Performance

Please see my blog.

Acknowledgements

1. Jim Baker

   Thanks for transfer the ownership of the name "guava" in PyPI.

Contributions

To me, all kinds of contributions are welcome.

1. Contribute to the core codes
2. Testcases
3. Examples
4. Documentation
5. Website or the Logo for the Guava project
6. Even request for new features!