Flask POST 请求给出 ReadTimeout 错误

Question

我正在开发一个应用程序，该应用程序可读取摄像头信号并将帧与其他一些数据一起发送。我目前正在使用线程读取来自 8 个不同相机的提要。

问题是，当我将数据包发送到 Flask 服务器时，出现 ReadTimeout 错误。

直到几天前它才完美运行，但我突然开始遇到这个错误。我相信错误出在服务器端，但我无法弄清楚是不是它导致了这个错误。

服务器端代码：

app2 = Flask(__name__)
cors = CORS(app2)

@app2.route("/", methods=["POST"])
def index():

    lock.acquire()
    zone_data = {}
    vehicle_data = {}
    try:
        start_time = time.time()
        np_array = np.frombuffer(request.data, np.uint8)
        frame = cv2.imdecode(np_array, cv2.IMREAD_COLOR)
        id = int(request.headers["id"])
        gw.cameras[id-1].last_receive_time = time.time()
        gw.cameras[id-1].server_online = True
        gw.cameras[id-1].online = True
        gw.cameras[id-1].information = json.loads(request.headers["occupancy_information"])

        gw.cameras[id-1].deque.append(frame)
        

        if gw.cameras[id-1].zone_manager.is_changed:
            zone_data = gw.cameras[id-1].zone_manager.all_zones
            vehicle_data = gw.cameras[id-1].zone_manager.all_vehicles

    
        response = {
                    'cam_id': str(gw.cameras[id-1].idx),
                    'is_changed': gw.cameras[id-1].zone_manager.is_changed,
                    'zone_data': zone_data,
                    'vehicle_data': vehicle_data
                }
        gw.cameras[id-1].zone_manager.is_changed = False
    
        return Response(response=str(response), status=200, mimetype="application/json")

    except Exception as e:
        logging.info(e)
        pass
        
    lock.release()

POST 请求发送代码：

try:
                    
    headers = {
               "id": str(self.instance_id),
               "occupancy_information": json.dumps(self.occupancy_info)               
              }
                       
    _, img_encoded = cv2.imencode('.jpg', frame)
                                    
    response = requests.post(
                             'http://{}:{}/'.format(self.target_ip, self.target_port + self.instance_id),
                              data=img_encoded.tostring(),
                              headers=headers,
                              timeout=10
                             )

    resp = ast.literal_eval(response.content.decode('utf-8'))
                        

    if response.status_code != 200:
        self.device_status = 0

    if resp['is_changed']:
        self.zone_data = resp['zone_data']
        self.vehicle_data = resp['vehicle_data']

        self.zone_data = dict(("C" + str(int(key[1])) + key[2:], value) for (key, value) in self.zone_data.items())
                        
        self.scene = np.zeros((1080, 1920))
        for zone_id, zone in self.zone_data.items():
            y = [coords[0] for coords in zone]
            x = [coords[1] for coords in zone] 
            rr, cc = polygon(x, y)
            self.scene[rr, cc] = int(zone_id[-1])
                            
        with open(self.zone_config_path, 'w') as file_reader:
            json.dump({"zone_data":self.zone_data, "vehicle_data":self.vehicle_data}, file_reader)
                        
except Exception as e:
    self.event_logs.info("ERROR Instance-{}: {}".format(self.instance_id, e))
    self.device_status = 0 
    print("UI",self.instance_id, e)
                                               
    exc_type, exc_obj, exc_tb = sys.exc_info()
    fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
    print(exc_type, fname, exc_tb.tb_lineno)

finally:
    pass