Add server.py: HTTP API server for IBAN generation via /api?konto=...&blz=...
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Hermes/iban_tool/server.py
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141
Hermes/iban_tool/server.py
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#!/usr/bin/env python3
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"""
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server.py - HTTP-API-Server für IBAN-Generierung.
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Startet einen lokalen Webserver, der Anfragen im Format
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/api?konto=123456789&blz=10020520
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bedient und eine IBAN als JSON zurückgibt.
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Nutzung:
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venv/bin/python server.py [PORT] [--host HOST]
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Standard: localhost:8000
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Beispiel-Anfrage:
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curl "http://localhost:8000/api?konto=123456789&blz=10020520"
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"""
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import argparse
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import json
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import sys
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import urllib.parse
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from http.server import HTTPServer, BaseHTTPRequestHandler
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# Importiert die Kernlogik aus iban.py (muss im selben Verzeichnis liegen)
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from iban import generate_iban
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class IBANRequestHandler(BaseHTTPRequestHandler):
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"""HTTP-Request-Handler für die IBAN-Generierungs-API."""
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def do_GET(self):
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"""Verarbeitet GET-Anfragen an /api."""
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# Stelle eine minimale Indexseite bereit
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if self.path == "/" or self.path == "":
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self._serve_index()
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return
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# Route: /api?konto=...&blz=...
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if not self.path.startswith("/api"):
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self._send_json(404, {"error": "Nicht gefunden", "valid": False})
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return
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self._handle_api_request()
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def _handle_api_request(self):
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"""Parst Query-Parameter und ruft die IBAN-Logik auf."""
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parsed = urllib.parse.urlparse(self.path)
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params = urllib.parse.parse_qs(parsed.query)
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kontonummer = params.get("konto", [None])[0]
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bankleitzahl = params.get("blz", [None])[0]
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if not kontonummer or not bankleitzahl:
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self._send_json(
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400,
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{
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"error": "Parameter 'konto' und 'blz' sind erforderlich.",
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"valid": False,
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},
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)
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return
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try:
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result = generate_iban(kontonummer, bankleitzahl)
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self._send_json(200, result)
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except Exception as e:
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self._send_json(
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500,
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{
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"error": f"Interner Serverfehler: {str(e)}",
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"valid": False,
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},
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)
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def _serve_index(self):
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"""Liefert eine einfache HTML-Indexseite."""
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html = (
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"<!DOCTYPE html>\n"
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"<html lang='de'>\n<head>\n"
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"<meta charset='UTF-8'>\n"
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"<meta name='viewport' content='width=device-width, initial-scale=1.0'>\n"
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"<title>IBAN Generator API</title>\n"
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"<style>\n"
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"body { font-family: Arial, sans-serif; max-width: 800px; margin: 40px auto; padding: 20px; }\n"
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"code { background: #f4f4f4; padding: 2px 6px; border-radius: 3px; }\n"
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"h2 { border-bottom: 2px solid #eee; padding-bottom: 8px; }\n"
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"</style>\n"
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"</head>\n<body>\n"
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"<h1>IBAN Generator API</h1>\n"
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"<p>Dieser Dienst generiert deutsche IBAN-Adressen aus Kontonummer und Bankleitzahl.</p>\n"
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"<h2>API-Endpunkt</h2>\n"
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"<p><code>/api?konto={Kontonummer}&blz={Bankleitzahl}</code></p>\n"
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"<h2>Beispiel</h2>\n"
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"<p>\n"
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"<a href='/api?konto=123456789&blz=10020520'>/api?konto=123456789&blz=10020520</a>\n"
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"</p>\n"
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"</body>\n</html>\n"
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)
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self.send_response(200)
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self.send_header("Content-Type", "text/html; charset=utf-8")
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self.end_headers()
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self.wfile.write(html.encode("utf-8"))
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def _send_json(self, status_code: int, data: dict):
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"""Sendet eine JSON-Antwort mit angegebenem Statuscode."""
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body = json.dumps(data, ensure_ascii=False, indent=2)
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self.send_response(status_code)
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self.send_header("Content-Type", "application/json; charset=utf-8")
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self.send_header("Access-Control-Allow-Origin", "*") # CORS für Frontend-Tests
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self.end_headers()
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self.wfile.write(body.encode("utf-8"))
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def main():
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parser = argparse.ArgumentParser(
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description="Startet einen lokalen HTTP-Server für die IBAN-Generierungs-API."
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)
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parser.add_argument(
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"port", nargs="?", type=int, default=8000,
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help="Port für den Server (Standard: 8000)"
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)
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parser.add_argument(
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"--host", default="0.0.0.0",
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help="Host-Adresse (Standard: 0.0.0.0 fuer alle Schnittstellen)"
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)
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args = parser.parse_args()
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print(f"Starte IBAN-API-Server auf http://{args.host}:{args.port}/")
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print(" GET /api?konto=...&blz=... -> IBAN als JSON")
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print(" GET / -> Diese Hilfeseite")
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print("Drücke Strg+C, um den Server zu stoppen.")
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server = HTTPServer((args.host, args.port), IBANRequestHandler)
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try:
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server.serve_forever()
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except KeyboardInterrupt:
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print("\nServer wird beendet...")
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server.server_close()
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if __name__ == "__main__":
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main()
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