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kodak/fresnel_lens/_server.py

55 lines
1.7 KiB
Python

import flask
from fresnel_lens import __about__
from fresnel_lens import configuration
from fresnel_lens import constants
from fresnel_lens import database
from fresnel_lens import exceptions
from fresnel_lens.resources import ResponseHeaders
def make_the_tea() -> None:
"""Just for fun
https://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_Protocol
"""
if flask.request.content_type == "message/coffeepot":
raise exceptions.IAmATeapotError(
f"Coffee brewing request for '{flask.request.path}' cannot be completed by teapot application"
)
def initialize_database() -> None:
"""Initialize the database connection"""
database.initialize(flask.current_app.appconfig)
class FresnelRequest(flask.Request):
"""Extend the default Flask request object to add custom application state settings"""
def make_response_headers(self) -> ResponseHeaders:
"""Create the headers dictionary of the standard response headers
This function should be used when determining response headers so that the header names,
their contents, and formatting are universal.
:returns: Dictionary of headers
"""
return {
constants.HTTP_HEADER_RESPONSE_VERSION: __about__.__version__,
}
class ImageMuckFlask(flask.Flask):
"""Extend the default Flask object to add the custom application config
There's probably an easier/more kosher way to do this, but ¯\\_(ツ)_/¯
"""
request_class = FresnelRequest
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.appconfig: configuration.FresnelConfig = configuration.load()