核心思想：

　　　　　　在獲取頁面內容會後，用BeautifulSoup對頁面標籤進行提取，提取出所有的Form表單，並進一步提取表單中的action(提交頁面的目標URL）,method，以及input。

import requests
from bs4 import BeautifulSoup
import sys
from urllib.parse import urljoin


def request_page(url, data, method):
    """
    編寫通用的頁面請求函式，可以根據不同的請求方法向目標頁面發起請求，比如get, post等
    """
 

    try:
        if data is None:
            response = requests.get(url)
            return response.text
        if method == 'get':
            response = requests.get(url, params=data)
            return response.text
        if method == 'post':
            response = requests.post(url, data=data)
            
 
return response.text
    except requests.exceptions.ConnectionError:
        pass


if __name__ == "__main__":
    target_url = "http://192.168.140.137/mutillidae/index.php?page=dns-lookup.php"
    response = request_page(target_url,None, 'get')
    if response is None:
        print("Nothing captured")
        sys.exit()
    beautified_content 
 
= BeautifulSoup(response)
    form_list = beautified_content.findAll('form')
    if len(form_list) == 0:
        print("No form is found!")
        sys.exit()
    for form in form_list:
        action = form.get('action')
        action_url_absolute = urljoin(target_url, action)
        method = form.get('method')
        input_list = form.findAll('input')
        input_dict = {}
        for input in input_list:
            input_name = input.get('name')
            input_type = input.get('type')
            input_value = input.get('value')
            if input_type == 'text':
                input_value = 'test'
            input_dict[input_name] = input_value
        res = request_page(action_url_absolute,input_dict,method)
        print(res)