我正在编写一个应用程序,该应用程序通过 SSH 将文件下载到其他盒子或从其他盒子上传文件时遇到问题。我遇到的问题是我可以很好地获取(下载)文件,但是当我尝试将它们放到(上传)到另一台服务器上时,我得到一个 EOFError() 异常。当我查看 paramiko\sftp.py 中的 _write_all() 时,似乎错误是因为它无法将任何数据写入流?我没有网络编程经验,所以如果有人知道它正在尝试做什么并且可以与我交流,我将不胜感激。
我编写了一个简化版本的函数,将我的连接处理为 ssh()。runCommand() 显示上传在我的应用程序中是如何失败的,而 simpleTest() 显示 sftp put 是如何工作的,但是除了我的 SFTP 对象的存储方式之外,我看不出 runCommand() 和 simpleTest() 之间的任何区别。一个存储在字典中,另一个单独存储。似乎字典是下载文件不起作用的问题,但事实并非如此。
有谁知道什么可能导致这种行为,或者如果这种方式导致问题,可以推荐另一种方式来管理我的连接?
我正在使用 Python 2.7 和 Paramiko 1.7.6。我已经在 Linux 和 Windows 上测试了这段代码并得到了相同的结果。
编辑:现在包括代码。
import os
import paramiko
class ManageSSH:
"""Manages ssh connections."""
def __init__(self):
self.hosts = {"testbox": ['testbox', 'test', 'test']}
self.sshConnections = {}
self.sftpConnections = {}
self.localfile = "C:\\testfile"
self.remotefile = "/tmp/tempfile"
self.fetchedfile = "C:\\tempdl"
def ssh(self):
"""Manages ssh connections."""
for host in self.hosts.keys():
try:
self.sshConnections[host]
print "ssh connection is already open for %s" % host
except KeyError, e: # if no ssh connection for the host exists then open one
# open ssh connection
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(self.hosts[host][0], 22, self.hosts[host][1], self.hosts[host][2])
self.sshConnections[host] = ssh
print "ssh connection to %s opened" % host
try:
self.sftpConnections[host]
print "sftp connection is already open for %s" % host
except KeyError, e:
# open sftp connection
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(self.hosts[host][0], 22, self.hosts[host][1], self.hosts[host][2])
self.sftpConnections[host] = ssh.open_sftp()
print "sftp connection to %s opened" % host
def runCommand(self):
"""run commands and return output"""
for host in self.hosts:
command = "if [ -d /tmp ]; then echo -n 1; else echo -n 0; fi"
stdin, stdout, stderr = self.sshConnections[host].exec_command(command)
print "%s executed on %s" % (command, host)
print "returned %s" % stdout.read()
self.sftpConnections.get(self.remotefile, self.fetchedfile)
print "downloaded %s from %s" % (self.remotefile, host)
self.sftpConnections[host].put(self.localfile, self.remotefile)
print "uploaded %s to %s" % (self.localfile, host)
self.sftpConnections[host].close()
self.sshConnections[host].close()
def simpleTest(self):
host = "testbox"
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(host, 22, 'test', 'test')
sftp = ssh.open_sftp()
print "sftp connection to %s opened" % host
sftp.get(self.remotefile, self.fetchedfile)
print "downloaded %s from %s" % (self.localfile, host)
sftp.put(self.localfile, self.remotefile)
print "uploaded %s to %s" % (self.localfile, host)
sftp.close()
if __name__ == "__main__":
test = ManageSSH()
print "running test that works"
test.simpleTest()
print "running test that fails"
test.ssh()
test.runCommand()
输出:
running test that works
sftp connection to testbox opened
downloaded C:\testfile from testbox
uploaded C:\testfile to testbox
running test that fails
ssh connection to testbox opened
sftp connection to testbox opened
if [ -d /tmp ]; then echo -n 1; else echo -n 0; fi executed on testbox
returned 1
downloaded /tmp/tempfile from testbox
Traceback (most recent call last):
File "paramikotest.py", line 71, in <module>
test.runCommand()
File "paramikotest.py", line 47, in runCommand
self.sftpConnections[host].put(self.localfile, self.remotefile)
File "C:\Python27\lib\site-packages\paramiko\sftp_client.py", line 561, in put
fr = self.file(remotepath, 'wb')
File "C:\Python27\lib\site-packages\paramiko\sftp_client.py", line 245, in open
t, msg = self._request(CMD_OPEN, filename, imode, attrblock)
File "C:\Python27\lib\site-packages\paramiko\sftp_client.py", line 627, in _request
num = self._async_request(type(None), t, *arg)
File "C:\Python27\lib\site-packages\paramiko\sftp_client.py", line 649, in _async_request
self._send_packet(t, str(msg))
File "C:\Python27\lib\site-packages\paramiko\sftp.py", line 172, in _send_packet
self._write_all(out)
File "C:\Python27\lib\site-packages\paramiko\sftp.py", line 138, in _write_all
raise EOFError()
EOFError