Fixes a race condition with multiple simultaneous get requests. (#1807)

* Fixes a race condition with multiple simultaneous get requests.

* Removed unused import

* Removed unused threading import

* Changed lock style to notation

* make style

Co-authored-by: WeberJulian <julian.weber@hotmail.fr>

TTS/server/server.py

@@ -5,6 +5,7 @@ import json
 import os
 import sys
 from pathlib import Path
+from threading import Lock
 from typing import Union
 
 from flask import Flask, render_template, request, send_file
@@ -168,8 +169,12 @@ def details():
     )
 
 
+lock = Lock()
+
+
 @app.route("/api/tts", methods=["GET"])
 def tts():
+    with lock:
         text = request.args.get("text")
         speaker_idx = request.args.get("speaker_id", "")
         style_wav = request.args.get("style_wav", "")