#!/usr/bin/env python3
"""
Dev server for The Web Platform Can Do That?!
Static files plus exactly ONE server-side program: /convert, the round-trip
half of the Unbreakable Page demo (just-whatever/unbreakable.html).
Zero packages here too — this is the Python standard library only.
python3 serve.py # http://localhost:8735/
python3 serve.py 9000 # custom port
"""
import sys
import html
from http.server import ThreadingHTTPServer, SimpleHTTPRequestHandler
from urllib.parse import urlparse, parse_qs
STRINGS = {
"en": {"dir": "ltr", "title": "Server says",
"computed": "Computed on the server — no JavaScript was involved.",
"bad": "is not a temperature. Server-side validation says no (Module 06 sends its regards).",
"back": "← Back to the article"},
"es": {"dir": "ltr", "title": "El servidor dice",
"computed": "Calculado en el servidor — sin JavaScript.",
"bad": "no es una temperatura. La validación del servidor dice que no.",
"back": "← Volver al artículo"},
"ar": {"dir": "rtl", "title": "يقول الخادم",
"computed": "حُسبت النتيجة على الخادم — دون جافاسكربت.",
"bad": "ليست درجة حرارة. تحقق الخادم يرفضها.",
"back": "→ العودة إلى المقال"},
}
class Handler(SimpleHTTPRequestHandler):
def do_GET(self):
url = urlparse(self.path)
if url.path != "/convert":
return super().do_GET()
qs = parse_qs(url.query)
raw = qs.get("c", [""])[0]
lang = qs.get("lang", ["en"])[0]
s = STRINGS.get(lang, STRINGS["en"])
back = self.headers.get("Referer") or "/just-whatever/unbreakable-article.html"
try:
c = float(raw)
result = f"{c:g} °C = {c * 9 / 5 + 32:g} °F"
note = s["computed"]
except ValueError:
result = f"“{html.escape(raw)}”"
note = s["bad"]
body = f"""
{s['title']}
{result}
{note}
{s['back']}
"""
payload = body.encode("utf-8")
self.send_response(200)
self.send_header("Content-Type", "text/html; charset=utf-8")
self.send_header("Content-Length", str(len(payload)))
self.end_headers()
self.wfile.write(payload)
if __name__ == "__main__":
port = int(sys.argv[1]) if len(sys.argv) > 1 else 8735
print(f"The Web Platform Can Do That?! → http://localhost:{port}/ (Ctrl+C stops)")
ThreadingHTTPServer(("", port), Handler).serve_forever()