A very micro http framework.
Project description
A very micro HTTP framework.
Features
Very simple, less-code & fast
Using object dispatcher instead of regex route dispatcher.
Url-Encoded, Multipart and JSON form parsing.
No request and or response objects is available, everything is combined in nanohttp.context.
A very flexible configuration system: pymlconf
Dispatching arguments using the obj.__annonations__
Method(verb) dispatcher.
Roadmap
The road map is to keep it simple with 100% code coverage. no built-in template engine and or ORM will be included.
Install
PyPI
$ pip install nanohttpFrom Source
$ cd path/to/nanohttp
$ pip install -e .Quick Start
demo.py
from nanohttp import Controller, RestController, context, html, json, HttpFound
class TipsControllers(RestController):
@json
def get(self, tip_id: int = None):
if tip_id is None:
return [dict(id=i, title="Tip %s" % i) for i in range(1, 4)]
else:
return dict(
id=tip_id,
title="Tip %s" % tip_id
)
@json
def post(self, tip_id: int = None):
tip_title = context.form.get('title')
print(tip_id, tip_title)
# Updating the tips title
# TipStore.get(tip_id).update(tip_title)
raise HttpFound('/tips/')
class Root(Controller):
tips = TipsControllers()
@html
def index(self):
yield """
<html><head><title>nanohttp Demo</title></head><body>
<form method="POST" action="/tips/2">
<input type="text" name="title" />
<input type="submit" value="Update" />
</form>
</body></html>
"""$ nanohttp demoOr
from nanohttp import quickstart
quickstart(Root())WSGI
Do you need a WSGI application?
wsgi.py
from nanohttp import configure, Application
configure(config='<yaml config string>', files=['path/to/config.file', '...'], dirs=['path/to/config/directory', '...'])
app = Application(controller=Root())
# Pass the ``app`` to any ``WSGI`` server you want.Serve it by gunicorn:
gunicorn --reload wsgi:appConfig File
Create a demo.yml file. The file below is same as the default configuration.
debug: true
domain:
cookie:
http_only: false
secure: falseYou may use nanohttp.settings anywhere to access the config values.
from nanohttp import Controller, html, settings
class Root(Controller):
@html
def index(self):
yield '<html><head><title>nanohttp demo</title></head><body>'
yield '<h2>debug flag is: %s</h2>' % settings.debug
yield '</body></html>'Passing the config file(s) using command line:
$ nanohttp -c demo.yml [-c another.yml] demoPassing the config file(s) Using python:
from nanohttp import quickstart
quickstart(Root(), config='<YAML config string>')Command Line Interface
$ nanohttp -h
usage: nanohttp [-h] [-c CONFIG_FILE] [-d CONFIG_DIRECTORY] [-b {HOST:}PORT]
[-C DIRECTORY] [-V]
[{MODULE{.py}}{:CLASS}]
positional arguments:
{MODULE{.py}}{:CLASS}
The python module and controller class to launch.
default is python built-in's : `demo_app`, And the
default value for `:CLASS` is `:Root` if omitted.
optional arguments:
-h, --help show this help message and exit
-c CONFIG_FILE, --config-file CONFIG_FILE
This option may be passed multiple times.
-d CONFIG_DIRECTORY, --config-directory CONFIG_DIRECTORY
This option may be passed multiple times.
-b {HOST:}PORT, --bind {HOST:}PORT
Bind Address. default: 8080
-C DIRECTORY, --directory DIRECTORY
Change to this path before starting the server default
is: `.`
-V, --version Show the version.Trailing slashes
If the Controller.__remove_trailing_slash__ is True, then all trailing slashes are ignored.
def test_trailing_slash(self):
self.assert_get('/users/10/jobs/', expected_response='User: 10\nAttr: jobs\n')Decorators
Available decorators are: action, html, text, json, xml, binary
Those decorators are useful to encapsulate response preparation such as setting Content-Type HTTP header.
Take a look at the code of the action decorator, all other decorators are derived from this:
def action(*verbs, encoding='utf-8', content_type=None, inner_decorator=None):
def _decorator(func):
if inner_decorator is not None:
func = inner_decorator(func)
func.__http_methods__ = verbs if verbs else 'any'
func.__response_encoding__ = encoding
if content_type:
func.__content_type__ = content_type
return func
if verbs and callable(verbs[0]):
f = verbs[0]
verbs = tuple()
return _decorator(f)
else:
return _decoratorOther decorators are defined using functools.partial:
html = functools.partial(action, content_type='text/html')
text = functools.partial(action, content_type='text/plain')
json = functools.partial(action, content_type='application/json', inner_decorator=jsonify)
xml = functools.partial(action, content_type='application/xml')
binary = functools.partial(action, content_type='application/octet-stream', encoding=None)Of-course, you can set the response content type using:
context.response_content_type = 'application/pdf'Of-course, you can define your very own decorator to make your code DRY:
import functools
from nanohttp import action, RestController
pdf = functools.partial(action, content_type='application/pdf')
class MyController(RestController)
@pdf
def get(index):
.......Serving Static file(s)
The nanohttp.Static class is responsible to serve static files:
from nanohttp import Controller, Static
class Root(Controller):
static = Static('path/to/static/directory', default_document='index.html')Then you can access static files on /static/filename.ext
A simple way to run server and only serve static files is:
cd path/to/static/directory
nanohttp :StaticAccessing request payload
The context.form is a dictionary representing the request payload, supported request formats are query-string, multipart/form-data, application/x-www-form-urlencoded and json.
from nanohttp import context, RestController
class TipsControllers(RestController):
@json
def post(self, tip_id: int = None):
tip_title = context.form.get('title')Dispatcher
The requested path will be split-ed by / and python’s getattr will be used on the Root controller recursively to find specific callable to handle request.
from nanohttp import RestController
class Nested(RestController):
pass
class Root()
children = Nested()Then you can access methods on nested controller using: http://host:port/children
On the RestController dispatcher tries to dispatch request using HTTP method(verb) at first.
Context
The context object is a proxy to an instance of nanohttp.Context which is unique per request.
Hooks
A few hooks are available in Controller class: begin_request, begin_response, end_response, request_error.
For example this how I detect JWT token and refresh it if possible:
from nanohttp import Application, Controller, context
class JwtApplication(Application):
token_key = 'HTTP_AUTHORIZATION'
refresh_token_cookie_key = 'refresh-token'
def begin_request(self):
if self.token_key in context.environ:
encoded_token = context.environ[self.token_key]
try:
context.identity = JwtPrincipal.decode(encoded_token)
except itsdangerous.SignatureExpired as ex:
refresh_token_encoded = context.cookies.get(self.refresh_token_cookie_key)
if refresh_token_encoded:
# Extracting session_id
session_id = ex.payload.get('sessionId')
if session_id:
context.identity = new_token = self.refresh_jwt_token(refresh_token_encoded, session_id)
if new_token:
context.response_headers.add_header('X-New-JWT-Token', new_token.encode().decode())
except itsdangerous.BadData:
pass
if not hasattr(context, 'identity'):
context.identity = NoneRelease history Release notifications | RSS feed
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