Bundle mission speech with an admin mute option and fix live audio downloads

tools/welcome_voice.py

@@ -25,6 +25,9 @@ WELCOME = ("Welcome to Escape Reintroduced. Work together, stay alert, "
            "and find your way off the island. Good luck.")
 ENDPOINT = "https://texttospeech.googleapis.com/v1/text:synthesize"
 MAX_AUDIO = 2 * 1024 * 1024
+# Enfusion rejects REST responses >= 1 MB. Keep each JSON/base64 response well
+# below that ceiling; this is transport slicing, not audio recompression.
+VOICE_CHUNK = 262144
 VETERAN_PROMPT = ("Speak as a fictional older war veteran, about sixty-five: a weathered, "
                   "slightly gravelly male voice, calm authority and dry warmth. "
                   "A concise field briefing to fellow soldiers, not a movie trailer. "
@@ -251,20 +254,41 @@ def handler_for(data, briefings=None):
             print("TTS request completed (200)", flush=True)
 
         def do_GET(self):
-            match = re.fullmatch(r"/clips/([0-9a-f]{64})\.b64", self.path)
+            url = urlsplit(self.path)
+            match = re.fullmatch(r"/clips/([0-9a-f]{64})\.b64", url.path)
+            if not match and url.path not in ("/welcome.wav", "/welcome.b64"):
+                self.send_error(404)
+                return
+            part = None
+            if url.query:
+                query = re.fullmatch(r"part=([0-9]{1,2})", url.query)
+                if not query or not url.path.endswith(".b64"):
+                    self.send_error(400)
+                    return
+                part = int(query[1])
             if match and briefings:
                 try:
                     payload = base64.b64encode(briefings.read(match[1]))
                 except (OSError, ValueError):
                     self.send_error(404)
                     return
-            elif self.path in ("/welcome.wav", "/welcome.b64"):
-                payload = encoded if self.path == "/welcome.b64" else data
+            elif url.path in ("/welcome.wav", "/welcome.b64"):
+                payload = encoded if url.path == "/welcome.b64" else data
             else:
                 self.send_error(404)
                 return
+            content_type = "text/plain" if url.path.endswith(".b64") else "audio/wav"
+            if part is not None:
+                offset = part * VOICE_CHUNK
+                if offset >= len(payload):
+                    self.send_error(416)
+                    return
+                payload = json.dumps({"offset": offset, "total": len(payload),
+                                      "data": payload[offset:offset + VOICE_CHUNK].decode("ascii")},
+                                     separators=(",", ":")).encode("ascii")
+                content_type = "application/json"
             self.send_response(200)
-            self.send_header("Content-Type", "text/plain" if self.path.endswith(".b64") else "audio/wav")
+            self.send_header("Content-Type", content_type)
             self.send_header("Content-Length", str(len(payload)))
             self.end_headers()
             self.wfile.write(payload)