Devserver: run Caddy on standard ports such that it can obtain certs.

scripts/devserver.py

@@ -13,7 +13,7 @@ All other options are forwarded to `paskia serve`.
 Backend always listens on localhost:4402.
 
 Options:
-    --caddy         Run Caddy as HTTPS proxy on port 4443
+    --caddy         Run Caddy as HTTPS proxy on port 443 (requires sudo)
     --rp-id HOST    Relying Party ID (used as hostname for Caddy)
     --origin URL    Allowed origin(s), passed to backend
     --auth-host H   Dedicated auth host, passed to backend
@@ -36,7 +36,8 @@ from urllib.parse import urlparse
 
 DEFAULT_VITE_PORT = 4403  # overrides by CLI option
 BACKEND_PORT = 4402  # hardcoded, also in vite.config.ts
-CADDY_PORT = 4443  # HTTPS port for Caddy proxy
+CADDY_PORT = 443  # HTTPS port for Caddy proxy
+CADDY_HTTP_PORT = 80  # HTTP port for ACME challenges
 DEFAULT_HOST = "localhost"
 
 NO_FRONTEND_TOOL = """\
@@ -61,11 +62,10 @@ NO_FRONTEND = """\
 ┃ for various frontend assets, so make sure to start it manually.
 """
 
-# Global options to disable auto HTTPS redirect (requires port 80)
+# Global options for Caddy
 CADDYFILE_GLOBAL = """\
 {
 	admin off
-	auto_https off
 	log {
 		level warn
 	}
@@ -210,8 +210,12 @@ def run_caddy(origins: list[str], vite_port: int) -> subprocess.Popen | None:
         # Extract scheme://host:port from origin URL
         scheme = parsed.scheme or "https"
         host = parsed.hostname or parsed.path  # handle case without scheme
-        port = parsed.port or (4480 if scheme == "http" else CADDY_PORT)
-        site_addr = f"{scheme}://{host}:{port}"
+        port = parsed.port or (CADDY_HTTP_PORT if scheme == "http" else CADDY_PORT)
+        # Use standard ports without explicit port in address (cleaner URLs)
+        if port in (80, 443):
+            site_addr = f"{scheme}://{host}"
+        else:
+            site_addr = f"{scheme}://{host}:{port}"
         block = (
             CADDYFILE_SITE_BLOCK
             .replace("SITE_ADDR", site_addr)
@@ -224,7 +228,8 @@ def run_caddy(origins: list[str], vite_port: int) -> subprocess.Popen | None:
     caddy_process = None
 
     try:
-        cmd = [caddy_path, "run", "--config", "-", "--adapter", "caddyfile"]
+        # Use sudo to bind to privileged ports (80/443) for ACME certificate fetching
+        cmd = ["sudo", caddy_path, "run", "--config", "-", "--adapter", "caddyfile"]
         caddy_process = subprocess.Popen(
             cmd,
             stdin=subprocess.PIPE,
@@ -316,21 +321,16 @@ def main():
             auth_host = args.auth_host
             if "://" not in auth_host:
                 auth_host = f"https://{auth_host}"
-            # Add port if not standard
-            parsed = urlparse(auth_host)
-            if not parsed.port:
-                caddy_origins.append(f"{auth_host}:{CADDY_PORT}")
-            else:
-                caddy_origins.append(auth_host)
+            caddy_origins.append(auth_host)
         else:
-            # Use rp-id as the hostname
-            caddy_origins.append(f"https://{args.rp_id}:{CADDY_PORT}")
+            # Use rp-id as the hostname (standard port 443, no port in URL)
+            caddy_origins.append(f"https://{args.rp_id}")
 
     # Start Caddy if requested (after computing origins)
     if args.caddy:
         if not caddy_origins:
-            caddy_origins = [f"https://{args.rp_id}:{CADDY_PORT}"]
-        stderr.write(f">>> caddy @ {' '.join(caddy_origins)}/\n")
+            caddy_origins = [f"https://{args.rp_id}"]
+        stderr.write(f">>> sudo caddy @ {' '.join(caddy_origins)}\n")
         if not run_caddy(caddy_origins, vite_port):
             raise SystemExit(1)