Python Paramiko：从远程执行命令的标准输出中读取

Paramiko: read from standard output of remotely executed command

提问by ollien

so I was working with paramiko for some basic SSH testing and I'm not getting any output into stdout. Heres my code.

所以我正在与 paramiko 一起进行一些基本的 SSH 测试，但我没有将任何输出输入到标准输出中。继承人我的代码。

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"

So whenever I run this, the command is executed (as seen by if I do something like a cp, the file is copied), but I always get "There was no output for this command". When stdout=stdout.readlines() is printed, [] is the output. In addition, if I add a print statement into the for loop, it never gets run. Could someone help me out here? Thanks!

因此，每当我运行此命令时，都会执行该命令（如我执行 cp 之类的操作所看到的，文件会被复制），但我总是得到“此命令没有输出”。当打印 stdout=stdout.readlines() 时， [] 是输出。此外，如果我在 for 循环中添加一个打印语句，它永远不会运行。有人可以帮我吗？谢谢！

采纳答案by jabaldonedo

You have closed the connection before reading lines:

您在阅读行之前关闭了连接：

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"

回答by kevin yu

*Interactive example ： ====Part 1， this show the sh output in server ，at the end of is ">" need some input to continual or exit ======

*交互式示例： ====第1部分，这显示了服务器中的sh输出，最后是“>”需要一些输入才能继续或退出======

selilsosx045:uecontrol-CXC_173_6456-R32A01 lteue$ ./uecontrol.sh -host localhost UE Control:Start UE control using: UE Control:java -Dlogdir= -Duecontrol.configdir=./etc -jar ./server/server-R32A01.jar -host localhost Loading properties from file /Users/lteue/Downloads/uecontrol-CXC_173_6456-R32A01/etc/uecontrol.properties Starting remote CLI towards host localhost Enter the command Q to exit the CLI, or the command HELP to get information on available commands. The CLI is ready for input. uec>

selilsosx045:uecontrol-CXC_173_6456-R32A01 lteue$ ./uecontrol.sh -host localhost UE Con​​trol:Start UE control using: UE Con​​trol:java -Dlogdir= -Duecontrol.configdir=./etc -jar ./server/server-R32A01. jar -host localhost 从文件加载属性 /Users/lteue/Downloads/uecontrol-CXC_173_6456-R32A01/etc/uecontrol.properties 启动远程 CLI 到主机 localhost 输入命令 Q 退出 CLI，或命令 HELP 获取可用信息命令。CLI 已准备好输入。 uec>

===========Pyhton code with peramiko ============*

============带有peramiko的Pyhton代码============*

Try below method ： while not stdout.channel.exit_status_ready():

试试下面的方法：虽然不是 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 

回答by Harshan Gowda

# 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)