First scrappy version, no API.
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[project]
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name = "fares-site"
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version = "0.1.0"
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description = ""
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authors = [
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{name = "Samuel Jones",email = "samuel@williamjones.me"}
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]
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requires-python = ">=3.14"
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dependencies = [
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"requests (>=2.34.2,<3.0.0)",
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"pandas (>=3.0.3,<4.0.0)",
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"pandas-stubs (>=3.0.3.260530,<4.0.0.0)",
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"jinja2 (>=3.1.6,<4.0.0)"
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]
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[build-system]
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requires = ["poetry-core>=2.0.0,<3.0.0"]
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build-backend = "poetry.core.masonry.api"
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"""
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CLI for starting the fares server.
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"""
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# Imports
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from fares_site.serve import create_fares_server, FaresServer
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# Script
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def main():
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server: FaresServer = create_fares_server()
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server.serve_forever()
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if __name__ == "__main__":
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main()
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"""
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Standard functions to call for fares information.
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"""
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# Imports
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import requests
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import pandas as pd
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import numpy as np
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# Init.
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# Functions
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def fares_query(origin: str, dest: str, date: str) -> pd.DataFrame:
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_ = requests # .get(url=url, headers=headers)
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df = pd.DataFrame(
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{
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"origin": [origin for _ in range(10)],
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"dest": [dest for _ in range(10)],
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"date": [date for _ in range(10)],
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"fare": np.random.rand(10) * 20,
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}
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)
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return df
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"""
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Web server core for the fares site.
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"""
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# Import
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from http.server import ThreadingHTTPServer, BaseHTTPRequestHandler
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from logging import Logger, INFO
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from requests.exceptions import ConnectionError
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from fares_site.api_calling import fares_query
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# Init.
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DEFAULT_ADDRESS = "127.0.0.1"
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DEFAULT_PORT = 12_000
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HTML_CONTENT_HEADER = """
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<!DOCTYPE HTML>
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<html>
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<head>
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<link rel="preconnect" href="https://fonts.googleapis.com">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link href="https://fonts.googleapis.com/css2?family=Merriweather+Sans:ital,wght@0,300..800;1,300..800&display=swap" rel="stylesheet">
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<link rel="icon" type="image/x-icon" href="https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Tag_with_pound_Pinhead_icon.svg/250px-Tag_with_pound_Pinhead_icon.svg.png">
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</head>
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<body style="font-family: 'Merriweather Sans';">
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<img height=30px src="https://upload.wikimedia.org/wikipedia/commons/thumb/d/d2/Tag_with_pound_Pinhead_icon.svg/250px-Tag_with_pound_Pinhead_icon.svg.png">
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BALLAST DATA | Fares <br>
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<br>
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"""
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HTML_CONTENT_FOOTER = """
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</body>
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</html>
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"""
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logger: Logger = Logger(name=__name__, level=INFO)
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# Classes
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class FaresHandler(BaseHTTPRequestHandler):
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def parse_url_query(self) -> dict[str, str]:
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return {
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s.split("=")[0]: s.split("=")[-1]
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for s in self.requestline.split(" ")[1].split("/")[1:]
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}
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def content_of_GET(self) -> str:
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"""
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Generates the content of a GET request.
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Responsible for receiving the requests' details and constructing the output.
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"""
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table = fares_query(
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origin=(_d := self.parse_url_query()).get("origin", "NCL"),
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dest=_d.get("dest", "NCL"),
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date=_d.get("date", "2026-04-06"),
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).style
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table = table.format({"fare": "{:.2f}"})
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text = table.to_html()
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return HTML_CONTENT_HEADER + text + HTML_CONTENT_FOOTER
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def do_GET(self) -> None:
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"""
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Handles GET requests - built-in method of BaseHTTPRequestHandler.
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Has been abstracted so only responsibility is exception handling.
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Currently, any exception is responded with '418: I am a teapot'.
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Depending on what can go wrong with the future fares API we should update this.
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"""
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try:
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content = self.content_of_GET()
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self.send_response(200)
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self.send_header("Content", "text/html")
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self.end_headers()
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_ = self.wfile.write(content.encode())
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return None
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except ConnectionError as ex:
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logger.warning(f"{type(ex)} | {ex}")
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self.send_response(503, "Upstream API refused to respond.")
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except Exception as ex:
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logger.critical(f"{type(ex)} | {ex}")
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self.send_response(
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418,
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"Something abnormal occured, apologies. It has been logged with importance.",
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)
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raise ex
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self.end_headers()
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class FaresServer(ThreadingHTTPServer): ... # Inherited just for typing.
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# Functions
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def create_fares_server(
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address: str = DEFAULT_ADDRESS, port: int = DEFAULT_PORT
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) -> FaresServer:
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return FaresServer(
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server_address=(address, port),
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RequestHandlerClass=FaresHandler,
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)
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