Automatically import APIStar sub apps
Project description
API Star AutoApp
Easily manage and compose API Star projects
Automatically orchestrates API Star projects with sub modules using an
app based pattern.
Features
- Automatically build URLs based on your project's structure.
- Autoapp Includes routes
from apps in your project creating the appropriate URL based on the
filesystem path from the projects root
app.pyfile.
- Autoapp Includes routes
from apps in your project creating the appropriate URL based on the
filesystem path from the projects root
- Automatically collect event_hooks and component lists from apps and consolidate them together to build the App/ASyncApp with.
- Easily add external packages that support the
app.pylayout.
ex:AutoApp(apps=['apistar_websocket']) - Allow an ordered priority list of apps by their path string to control the order of items in the event_hooks and component lists as well as control import order.
Quickstart
Just use AutoApp or AutoASyncApp in place of App and ASyncApp respectively
from apistar-autoapp import AutoApp
async def welcome() -> dict:
return {'msg': 'hello'}
routes = [
Route('/', 'GET', handler=welcome, name='welcome'),
]
app = AutoApp(
routes=routes,
)
if __name__ == '__main__':
app.serve('127.0.0.1', 8000, debug=True)
An ASync application that uses the apistar-websocket package. To use the external library simply
list it in the apps parameter.
NOTE: packages listed in apps must support the app.py
layout.
from apistar-autoapp import AutoASyncApp
async def welcome() -> dict:
return {'msg': 'hello'}
routes = [
Route('/', 'GET', handler=welcome, name='welcome'),
]
app = AutoASyncApp(
apps=['apistar_websocket'],
routes=routes,
)
if __name__ == '__main__':
app.serve('127.0.0.1', 8000, debug=True)
Install
pip install apistar-autoapp
or for Pipenv users
pipenv install apistar-autoapp
Anatomy
For a package to be considered an 'app' it must contain a file named app.py in it's top directory. The
app.py file can be empty. It's in the app.py file where you expose what your app
provides to the API Star configuration. Autoapp will look
for three attributes on the app.py module and if they're found add them to the API Star
configuration at startup.
The attributes must be lists and named:
routes
components
event_hooks
For example, a simple app that only exposes it's routes could be:
app.py:
from .handlers import routes
Or an app that exposes it's routes, event_hooks and components:
app.py:
from .handlers import routes
from .components import components
from .event_hooks import event_hooks
And of course if you have a simple app you can have all of your code in the app.py and
then have module variables defined by your application code.
A simple app:
from apistar import App, Route
def homepage() -> str:
return '<html><body><h1>Homepage</h1></body></html>'
routes = [
Route('/', method='GET', handler=homepage),
]
Example project structure
project/
app.py
v1/
app.py
...
endpointOne/
app.py
...
endpointTwo/
app.py
...
If the v1/app.py file is empty and each of the endpoint* apps exposes a single root URL, /, route the
route URLs created for the project, via Includes
would be:
/v1/endpointOne
/v1/endpointTwo
And if endpointOne had another route for the URL /users, you'd then have:
/v1/endpointOne
/v1/endpointOne/users
/v1/endpointTwo
Docs
AutoApp
AutoApp(project_dir: str = None,
priority_apps: list = None,
print_results: bool = False,
**kwargs) -> App
Parameters:
(Optional)
apps: A list of packages to add to your App. Use this for packages outside or your App/project.
Packages listed in the apps list must be on your PYTHON_PATH.
(Optional)
project_dir: The directory from which apistar-autoapp will look for a project root.
This is autodetected if not used and you normally won't use this parameter.
(Optional)
priority_apps: A list of apps, by their import path, that will be imported before all
other apps found by apistar-autoapp and imported in the order they are given.
(Optional)
print_results: Print the results of the configuration created by apistar-autoapp to
the console.
kwargs: These are the arguments you'd normally pass to App or ASyncApp. If you pass
any of the arguments: routes, components or event_hooks, they will be given precedence
and listed before any of the corresponding values created by autoapp.
AutoASyncApp
The same as AutoApp but creates a project using ASyncApp
AutoASyncApp(project_dir: str = None,
priority_apps: list = None,
print_results: bool = False,
**kwargs) -> ASyncApp
app_args
app_args(project_dir: str = None,
priority_apps: list = None,
print_results: bool = False,
**kwargs) -> dict:
app_args is the same as AutoApp and AutoASyncApp except it returns a dictionary of arguments
that are intended for use by App or ASyncApp.
In fact AutoApp is just:
def AutoApp(**kwargs) -> App:
return App(**app_args(**kwargs))
So if you want to do something with the data from autoapp before creating your App it's easy:
kwargs = app_args(...)
# Do something with kwargs
# ...
app = App(**kwargs)
Print helper
There are some printing helpers for internal use by apistar-autoapp but are exposed for use by other
modules. There is a Printer class the uses print by default but can use any function that
accepts a string in it's place.
from apistar_autoapp.printer import Printer
pr = Printer()
# Or if you want to your own print function, like a logger:
pr = Printer(printer=logger.info)
...
# to print out a list of routes:
pr.routes(routes)
include
Prints an Include instance to the console as well as all of it's Routes in the form:
Include: <url> <name>
<Routes>
ex:
Include: /v2/welcome v2:welcome Route: GET /, welcome app.welcome() -> dict:
route
Prints a Route instance to the console in the form:
Route: <method> <url>, <name>
<handler>
ex:
Route: GET /, welcome
app.welcome() -> dict:
routes
Prints a list of Routes and Includes using print_route and print_include in the form:
Routes:
[
<print_route> or <print_include>,
...
]
ex:
Routes:
Route: GET /, welcome
app.welcome() -> dict:
Include: /v2/home v2:home
Route: GET /v2/home/, list
v2.home.handlers.list_homes() -> list:
...
components
Prints a list of components in the form:
Components:
<ComponentClass>
resolve(<signature>) -> <returns>:
ex:
Components:
WebSocketComponent
resolve(self, scope: ASGIScope, send: ASGISend, receive: ASGIReceive, app: App) -> WebSocket:
TODO
- Allow any package with an
app.pyfile that is importable to be used with Autoapp - Add the ability to have a list of excluded apps that will not be imported by Autoapp
- Add printer for
event_hooks
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