WebSocket代理数据接收异常问题求助

服务器配置 #

Server A（172.16.2.5） #

运行Python应用，创建WebSocket连接至Server B并周期性发送消息：

from time import sleep
from websocket import create_connection
ws = create_connection("ws://172.16.2.6:80/")
while True:
    print("Sending...")
    ws.send("Hello world")
    print("Sent")
    sleep(5)

Server B（172.16.2.6） #

运行websockify工具，将WebSocket连接转发至Server C的TCP服务，启动命令：

./run -v 80 172.16.2.7:33333

Server C（172.16.2.7） #

运行Python TCP服务接收Server B转发的消息：

import socket, time
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
    s.bind('', 33333)
    s.listen()
    conn, addr = s.accept()
    with conn:
        print("Connected by", addr)
        while True:
            data = conn.recv(11)
            print("Received: %s" % data)
            time.sleep(5)

运行现象 #

Server A输出（无报错） #

Sending...
Sent
Sending...
Sent

Server B的websockify输出（Server A启动后立即打印） #

172.16.2.5: new handler Process
172.16.2.5 - - [07/Jun/2024 15:40:36] "GET / HTTP/1.1" 101 -
172.16.2.5 - - [07/Jun/2024 15:40:36] 172.16.2.5: Plain non-SSL (ws://) WebSocket connection
172.16.2.5 - - [07/Jun/2024 15:40:36] connecting to: 172.16.2.7:33333

Server C输出（Server A启动后立即打印） #

Connected by ('172.16.2.6', 32906)

异常问题 #

1. Server C调用conn.recv(11)时永久阻塞，直到停止Server A应用后，才开始每5秒输出Received:消息；
2. Server C无法接收有效数据，仅持续输出Received: b''，预期应为每5秒输出Received: Hello world。

内容的提问来源于stack exchange，提问作者pacoverflow