Python SSL套接字错误:ssl.SSLWantReadError:操作未完成(读取)

时间:2016-12-06 23:30:48

标签: python-3.x sockets ssl blocking recv

我有一个通过自签名证书使用SSL的普通服务器。我试图使用Python 3.4.2 SSL套接字库创建连接并通过以下脚本返回数据并带有相关错误:

import socket, ssl

s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

ssl_socket = ssl.wrap_socket(s, keyfile="/path/to/server.pem", certfile="/path/to/client.pem", cert_reqs=ssl.CERT_REQUIRED, ssl_version=ssl.PROTOCOL_TLSv1_2, ca_certs="/path/to/client.pem")

ssl_socket.connect(('hostname', port))
ssl_socket.send("data_string".encode())
# returns '4' (number of returned bytes)
ssl_socket.setblocking(0) # turn off blocking
ssl_socket.recv(4096)
# error: ssl.SSLWantReadError: The operation did not complete (read) (_ssl.c:1960)

如果我没有将阻止设置为0,它就会挂起。我做了足够多的研究,发现它与返回数据的大小有关,但我在调用ssl_socket.send()时获得了4个字节的返回值,所以我'我不确定我错过了什么。

请注意,我有一个perl客户端,它可以正常工作,如下所示:

#!/usr/bin/env perl

use IO::Socket::INET;
use IO::Socket::SSL;

# auto-flush on socket
$| = 1;

# create a connecting socket
my $socket = new IO::Socket::SSL (
    PeerHost => 'hostname',
    PeerPort => '12345',
    Proto => 'tcp',
    SSL_cert_file => $ENV{'HOME'} . '/path/to/client.pem',
    SSL_key_file => $ENV{'HOME'} . '/path/to/server.pem',
);
die "cannot connect to the server $!\n" unless $socket;
print "connected to the server\n";

# data to send to a server
my $req = 'data';
print $socket "$req\n";
my @r = ( <$socket> ) ;
print "@r";

$socket->close();

输出:

connected to the server
{
   "password": "passwd",
   "username": "username"
}

使用Python SSL库检索我请求的数据的正确方法是什么?

1 个答案:

答案 0 :(得分:0)

答案:我的数据字符串末尾需要一个'\n'字符。