weepy 1.2.0

Tiny ASGI framework

weepy

Tiny python ASGI framework

Installing weepy

Simply use pip for install this package Installation:

$ pip install weepy # starndard version
# or version with developer requirements
$ pip install weepy[dev]

Running development server

$ weepy [web server parameters]

Using

Change directory to project folder and run devserver.

$ weepy --host 127.0.0.1 --port 8080 --app `file`:`callable`

Replace file with filename (without file extension) with your main function and callable with your function.
App should run on localhost:8080.

Command parameters

• --env should contain python ini configuration file
• --host should contain IP address to bind server on
• --port should contain port to be bind server on
• --app should contain file and callable object separated by colon. (main:app)
• --pythonpath should contain your code directory for imports in your project
• --daemon starts server in deamon mode

Bash syntax:

$ weepy [--config CONFIG] [--host IP_ADDRESS] [--port PORT] [--app file:callable] [--pythonpath path] [--daemon]

You can create server configuration in uasgi ini file.
If you want to run python files without devserver add project directory to PYTHONPATH.

Using weepy

Initializing

from weepy import ASGI

application = ASGI(content_type="application/json", allow="*", charset="UTF-8")

ASGI parameters:

• content_type - specifies the default content type of generated responses (optional, default: application/json)
• charset - specifies the default charset generated responses (optional, default: UTF-8)
• allow - specifies global setting for Access-Control-Allow-Origin header - can be overwrited by passing that header to response headers (optional, default None - for public API should be set to *)

Routes

Route parameters

• endpoint - object should contain str or regex Pattern to match request path (mandatory)
• type - defines that routed is serving HTTP or WebSocket protocol (possible values: http, websocket; defalut: http)
• methods - list of HTTP methods to match request method - higher priority than method (optional, default: [GET], should be only be specified on http type routes)
• *kwargs - other arguments - can be accessed by midlleware in states routed and end
• content-type

Using

Route is used as a decorator callable object you want to use as router method. Router method takes two mandatory arguments Request and Response (explained below in a separate section). Router method can also take variables from router regex match (if used).

HTTP Examples

import re
from weepy import Route


@Route("/endpoint", methods=["GET"])  # simple route
async def routed_method_1(request, response):  # simple route method
	return "Response from route 1" # response return without status code & mime type

# re package import needed
@Route(re.compile(r"/endpoint/(\d+)$"), methods=["GET", "POST"]) # regex route, with multiple methods
async def routed_method_2(request, response, number):
	return "Response from route - urlnumber is: %s" % number, "200 OK", "text/html" # full response return

@Route("/endpoint3", methods=["GET", "POST"]) #simple route, with multiple methods
async def routed_method_2(request, response):
	response.set("Response by set") # alternatively can be called reponse method set to set response

Abort HTTP response

Force http response with response abort method parameters: status, message (body)

from weepy import Route

@Route("/raise_endpoint", methods=["POST"])
async def routed_method_2(request, response):
	if not request.data:
		await response.abort(400, "400 BAD REQUEST")
	return "data sent"

Request & Response objects

Instances of these object are given to every function that is called with @Route decorator

from weepy import Route

@Route("/endpoint", methods=["GET"])
async def endpoint(Request, Response):  # instances of Request and Response objects
	pass

Request items and methods (HTTP)

• method - request method (GET, POST etc.) : read only
• path - request path: read only
• query_params - dict of query_string parameters
• data - request parsed data (json, -www-form-urlencoded, multipart/form-data) : read only
• headers - HTTP headers : read only (may contain content_length and content_type in post requests)
• cookies - dict contains SimpleCookie object of every cookie loaded
• scope - raw asgi scope obeject
• event - raw asgi event object

Response items and methods (HTTP)

content_type - response content-type : read only - can be specified in route

• charset - response encoding; default: UTF-8
• headers - list of response headers
  
  
• redirect(location, status) - redirects response to (location, status if not providet is set to 302)
• set_cookie(name, value, expires=None, maxAge=None, **kwargs) - adds cookie to response with obvious parameres, you can alwo add additional arguments (kwargs) such as Domain, Path, Secure, HttpOnly
• add_header(name, value) - adds header to response
• process(data, status=200) - allow to manual process response (body, status[optional, default=200] )
• abort(400, body="400 BAD REQUEST") - force HTTP response (status, body[optional, default=b""])

Example

Save this file as main.py

from weepy import ASGI, Route

application = ASGI(content_type="text/html")


@Route("/endpoint", methods=["GET", "POST"])
async def endpoint(Request, Response):
	Response.add_header("X-header", "blahblah")  # set response header
	Response.set_cookie("cookie_from_server", "384")  # set reponse cookie
	return "Response BODY"

Chdir into directory with main.py file and start weepy dev server:

$ weepy --host 127.0.0.1 --port 8080 --app main:application

App should run on localhost:8080 and
URL http://localhost:8080/endpoint should now response with "Response BODY"