actions-server

Actions Server

A very simple, multi-threaded HTTP server.

Mainly designed for a very simple tasks, f.ex. 3 json-based endpoints with a simple logic

It utilizes a concept of "Actions" - the functions that can be executed to provide HTTP response.

Important note:

This server DOES NOT cover all HTTP functionality. This is intentional and probably will not be changed in the future.

Usage

from actions_server import *

ACTIONS = [
    JsonGet("/get", lambda params: {"response": "ok from GET action"}),
    JsonPost("/post", lambda params, body: {"response": "ok from POST action"}),
    Redirect("/", "/get"),
    StaticResources("/static", "./src/web")
]

server = http_server(port=80, actions=ACTIONS, thread_count=5)

try:
    server.start(block_caller_thread=True)
finally:
    server.stop()

In this example, a server will be started on port 80 and the main thread will be blocked. The server will react on several requests:

• curl -X GET "http://localhost:80/get" will produce {"response": "ok from GET action"} response
• curl -X POST "http://localhost:8080/post will produce {"response": "ok from POST action"} response
• curl -X GET "http://localhost:80/ will send HTTP 301 Redirect to `http://localhost:80/get"
• curl -X GET "http://localhost:80/static/aaa.png will return an image ./src/web/aaa.png

Actions out-of-the-box

JsonGet(endpoint, callable)

Will listen to the endpoint endpoint, call callable(params) (where params is a dict of arguments; note - values are always an array!) and convert resulting dict into JSON

JsonPost(endpoint, callable, body)

Will listen to the endpoint endpoint, call callable(params, body) (where params is a dict of arguments; note - values are always an array!, and body is a parsed the request body into dict) and convert resulting dict into JSON

Redirect(from, to)

Will send HTTP 301 Redirect

StaticResources(path, dir)

Will server all files from dir under path path

Implementing custom action

from actions_server import *

class MyCustomResponse(Response):
    def __init__(self, payload):
        self._payload = payload

    def headers(self) -> dict:
        return {'Content-type': 'text/plain'}

    def response_body_bytes(self):
        return self._payload.encode('utf-8')

class MyCustomAction(Action):
    def can_handle(self, method, path, params, payload):
        return method == 'GET' and path == '/hello'

    def handle(self, method, path, params, payload) -> Response:
        return MyCustomResponse("hello there!")

Notes:

• parameter method may contain two strings - GET or POST
• response body must be bytes!