Paramiko：从远程执行命令的标准输出读取

Question

所以我和paramiko一起进行了一些基本的SSH测试，但没有任何输出到stdout。这是我的密码。

import paramiko
client=paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
com="ls ~/desktop"
client.connect('MyIPAddress',MyPortNumber, username='username', password='password')
output=""
stdin, stdout, stderr = client.exec_command(com)

print "ssh succuessful. Closing connection"
client.close()
print "Connection closed"
stdout=stdout.readlines()
print stdout
print com
for line in stdout:
    output=output+line
if output!="":
    print output
else:
    print "There was no output for this command"

所以每当我运行这个命令时，就会执行这个命令（如我执行cp之类的操作时所看到的，文件会被复制），但我总是得到“这个命令没有输出”。当打印stdout=stdout.readlines（）时，[]是输出。此外，如果我在for循环中添加print语句，它将永远不会运行。有人能帮我吗？谢谢！

Answer 1

# Program to print the output in console/interpreter/shell in runtime without using stdout.

 import paramiko
 import xlrd
 import time

 ssh = paramiko.SSHClient()
 ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

 loc = ('/Users/harshgow/Documents/PYTHON_WORK/labcred.xlsx')
 wo = xlrd.open_workbook(loc)
 sheet = wo.sheet_by_index(0)
 Host = sheet.cell_value(0, 1)
 Port = int(sheet.cell_value(3, 1))
 User = sheet.cell_value(1, 1)
 Pass = sheet.cell_value(2, 1)

 def details(Host, Port, User, Pass):
       time.sleep(2)

       ssh.connect(Host, Port, User, Pass)
       print('connected to ip ', Host)

       stdin = ssh.exec_command("")
       remote_conn = ssh.invoke_shell()
       print("Interactive SSH session established")

       output = remote_conn.recv(1000)
       remote_conn.send("\n")
       remote_conn.send("xstatus Cameras\n")

       time.sleep(5)
       output = remote_conn.recv(10000)
       print(output)

 details(Host, Port, User, Pass)

Answer 2

您已在读取行之前关闭连接：

import paramiko
client=paramiko.SSHClient()
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
com="ls ~/desktop"
client.connect('MyIPAddress',MyPortNumber, username='username', password='password')
output=""
stdin, stdout, stderr = client.exec_command(com)

print "ssh succuessful. Closing connection"
stdout=stdout.readlines()
client.close()
print "Connection closed"

print stdout
print com
for line in stdout:
    output=output+line
if output!="":
    print output
else:
    print "There was no output for this command"

Answer 3

*交互式示例： ===第1部分，这显示服务器中的sh输出，在结尾处是“>；” 需要一些输入才能继续或退出

selilsosx045:uecontrol-CXC_173_6456-R32A01 lteue$/uecontrol.sh-主机本地主机 UE控件：使用以下命令启动UE控件： UE控件：java-Dlogdir=-Duecontrol.configdir=./etc-jar./server/server-R32A01.jar-host本地主机 从文件/Users/lteue/Downloads/uecontrol-CXC_173_6456-R32A01/etc/uecontrol.properties加载属性 向主机localhost启动远程CLI 输入命令Q退出CLI或命令帮助 获取有关可用命令的信息。 CLI已准备好输入。 uec>；

===带peramiko的Pyhton代码===*

尝试以下方法：而不是stdout.channel.exit_status_ready（）：

def shCommand(server_list):
server_IP = server_list[0]
username  = server_list[1]
password  = server_list[2]

ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(server_IP,22,username, password)strong text

commandList = ['list \n']
alldata = getUeInfo(ssh,commandList)
ssh.close()

def getUeInfo(ssh,commandList):
data_buffer = ""
num_of_input = 0
stdin, stdout, stderr = ssh.exec_command('cmd')
while not stdout.channel.exit_status_ready():
   solo_line = ""        

   if stdout.channel.recv_ready():

      solo_line = stdout.channel.recv(1024)  # Retrieve the first 1024 bytes
      data_buffer += solo_line               


   if(cmp(solo_line,'uec> ') ==0 ):    #len of solo should be 5 ,
     if num_of_input == 0 :
      data_buffer = ""    
      for cmd in commandList :
       #print cmd
       stdin.channel.send(cmd)
      num_of_input += 1
     if num_of_input == 1 :
      stdin.channel.send('q \n') 
      num_of_input += 1

return data_buffer