将来自 Nmap 子进程的数据直接存储到列表中

Question

我有以下方法从运行 nmap 子进程中获取 IP 列表：

import subprocess
import os

def get_hosts(ips, exclude_file, outfile):
    # Run the NMAP for given IPs
    output = subprocess.Popen(['nmap', ips, '-sn', '-T4', '-oG', 'temp.txt', '--excludefile', exclude_file], shell=False, stdout=subprocess.PIPE)
    # Open temp file
    file = open('temp.txt', 'r')
    # Get IP addresses
    ip_list = []
    for line in file:
        a = line.split(" ")
        # Bypass first and last line
        if a[1] == 'Nmap':
            pass
        else:
            ip_list.append(a[1])
    # Close file
    file.close()
    # Remove temp file
    os.remove('temp.txt')
    return ip_list

ips = get_hosts('10.0.0.0/8', 'exclude.txt', 'output.txt')
print (ips)

我希望能够将这些存储在列表中，而不必创建临时文件并将其删除。这可能吗？我是 python 的新手，所以任何东西都会有所帮助。

Answer 1

来自 nmap 文档：

Output

...

Nmap makes output available in five different formats. The default is called interactive output,. and it is sent to standard output (stdout).. There is also normal output,. which is similar to interactive except that it displays less runtime information and warnings since it is expected to be analyzed after the scan completes rather than interactively.

...

While interactive output is the default and has no associated command-line options, the other four format options use the same syntax. They take one argument, which is the filename that results should be stored in.

所以我认为，与其将 nmap 过程的输出保存到 temp.txt 文件中，不如将其默认发送到 stdout，这样：

>>> output = subprocess.Popen(['nmap', ips, '-sn', '-T4'], shell=False, stdout=subprocess.PIPE)

然后检查结果，使用Popen.communicate:

>>> output.communicate()

Popen.communicate(input=None)

Interact with process: Send data to stdin. Read data from stdout and stderr, until end-of-file is reached. Wait for process to terminate. The optional input argument should be a string to be sent to the child process, or None, if no data should be sent to the child.

communicate() returns a tuple (stdoutdata, stderrdata).

Note that if you want to send data to the process’s stdin, you need to create the Popen object with stdin=PIPE. Similarly, to get anything other than None in the result tuple, you need to give stdout=PIPE and/or stderr=PIPE too.

Note

The data read is buffered in memory, so do not use this method if the data size is large or unlimited.

输出类似于：

>>> output.communicate()
('\nStarting Nmap 6.40 ( http://nmap.org ) at 2015-12-05 00:58 GST\nNmap scan report for 10.0.2.3\nHost is up (0.011s latency).\nNmap scan report for 10.0.2.15\nHost is up (0.000059s latency).\n', None)

是(stdout,stderr)的一个元组，然后取这个元组的第一个元素，通过解析得到你想要的IP，比如regex.

将来自 Nmap 子进程的数据直接存储到列表中

Storing Data from an Nmap Subprocess into a List Directly

python

subprocess

list

nmap