Python 3.7.7 SSL socketserver ConnectionResetError:[WinError 10054]远程主机强制关闭了现有连接

我在win10系统上用python编写了一个简单的客户机-服务器应用程序。我正在使用Python 3.7.7

当客户端连接到服务器时，我收到以下错误：

Sending data
Traceback (most recent call last):
  File "Client.py", line 23, in <module>
    ssock.send(b'this is a test\n')
  File "D:\SecureServer\Python37\lib\ssl.py", line 1003, in send
    return self._sslobj.write(data)
ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host

这是客户：

import socket
import ssl


if __name__ == '__main__':

    ctx = ssl.create_default_context()
    ctx.verify_mode = ssl.CERT_REQUIRED
    ctx.check_hostname = True

    certs_folder = './certs/'
    server_certs = certs_folder + 'ca-chain.cert.pem'
    ctx.load_verify_locations(cafile=server_certs)
    client_cert = certs_folder + 'www.example.com.cert.pem'
    client_key = certs_folder + 'www.example.com.key.pem'
    ctx.load_cert_chain(certfile=client_cert, keyfile=client_key, password=None)

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
        print(sock)
        with ctx.wrap_socket(sock, server_side=False, server_hostname="www.example.com") as ssock:
            ssock.connect(("127.0.0.1", 3278))
            print("SSL established. Peer: {}".format(ssock.getpeercert()))
            ssock.send(b'this is a test\n')  # this is line 23

---

经过深入分析，我发现了一些错误：

1） 客户端证书不能是服务器证书；我对客户端和服务器使用了相同的证书。解决方案：创建正确的客户端证书

2） SSL套接字由于SSL 3路握手而阻塞，因此，如果客户端在发送数据后关闭套接字，服务器将断开连接。必须管理数据传输

import socket
import ssl


if __name__ == '__main__':

    ctx = ssl.create_default_context()
    ctx.verify_mode = ssl.CERT_REQUIRED
    ctx.check_hostname = True

    certs_folder = './certs/'
    server_certs = certs_folder + 'ca-chain.cert.pem'
    ctx.load_verify_locations(cafile=server_certs)
    client_cert = certs_folder + 'www.example.com.cert.pem'
    client_key = certs_folder + 'www.example.com.key.pem'
    ctx.load_cert_chain(certfile=client_cert, keyfile=client_key, password=None)

    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
        print(sock)
        with ctx.wrap_socket(sock, server_side=False, server_hostname="www.example.com") as ssock:
            ssock.connect(("127.0.0.1", 3278))
            print("SSL established. Peer: {}".format(ssock.getpeercert()))
            ssock.send(b'this is a test\n')  # this is line 23