将域与 DNS 解析器名称匹配 - Python

Question

我还是 Python 的新手，并且一直致力于此工作，以及一些与它相关的辅助项目，用于自动化我的 Plex 媒体管理任务。

我正在尝试编写一个 python 脚本，它允许我从 csv 文件中获取一组域列表，将它们与它们的 dns 名称匹配：示例（使用“NS”的 Plex.tv 将返回 jeremy.ns.cloudflare .com)

我的主要目标是从 csv 中读取域列表

运行我的代码以将这些域与 dns 解析器名称匹配

将它们写入一个新的 CSV 文件，然后将两者压缩在一起，这就是我的代码中的内容。

在此过程中我遇到了一些问题。

1. Visual Code 不允许导入 dns.resolver（不是一个大问题，但如果您知道解决方法，我就不必从命令行运行它）
2. 将域与其 DNS 解析器匹配会引发错误“AttributeError: 'list' object has no attribute 'is_absolute'”

import csv
import socket
import dns.resolver
import os
from os.path import dirname, abspath

# Setting Variables
current_path = dirname(abspath(__file__))
domainFName = '{0}/domains.csv'.format(current_path)
outputFile = '{0}/output.csv'.format(current_path)
dnsList = '{0}/list2.csv'.format(current_path)
case_list = []
fields = ['Domains', 'DNS Resolvers']
caseList = []
dnsResolve = []

# Read in all domains from csv into list
with open(domainFName, 'r') as file:
    for line in csv.reader(file):
        case_list.append(line)

print(case_list)

# Match domains to the DNS Resolver Name
for domains in case_list:
    answer = dns.resolver.resolve(domains, 'NS')
    server = answer.target
    dnsResolve.append(server)

# Write the dns Resolver names into a new csv file
with open(dnsList,'w', newline="") as r:
    writers = csv.writer(r)
    writers.writerows(caseList)      

# Write the domains and dns resolvers to new output csv
with open(outputFile,'w', newline="") as f:
    writer = csv.writer(f)
    writer.writerow(fields)
    writer.writerow(zip(case_list,caseList))

exit()

感谢您的帮助

Answer 1

在与同事讨论后，我能够解决我的问题，为了解决这个问题，如果有人想将此代码用于类似的需求（我们将其用于 DMARC），我将发布整个代码：

import dns.resolver 
import csv
import os
from os.path import dirname, abspath


# Setting Variables
current_path = dirname(abspath(__file__))
domainFName = '{0}/domains.csv'.format(current_path)
outputFile = '{0}/output.csv'.format(current_path)
dnsList = '{0}/dnslist.csv'.format(current_path)
backupCSV = '{0}/backup-output.csv'.format(current_path)
case_list = []
dns_list = []
fields = ['Domains', 'DNS Resolvers']
csv_output = zip(case_list, dns_list)
domainAmount = 0
rd = 00
dnresolve = 00
part = 0
percentL = []
percents = [10,20,30,40,50,60,70,80,90,95,96,97,98,99]
percentList = []
floatingList = []
floatPart = []
x = 00
keyAzure = 'azure'
keyCSC = 'csc'
 

while x < .99:
    x += .01
    floatingList.append(x)

# THIS IS THE CODE FOR WRITING CSV FILES INTO LISTS - LABELED AS #1
print("FILES MUST BE CSV, WILL RETURN AN ERROR IF NOT. LEAVE OFF .CSV")

# Here we will gather the input of which csv file to use. If none are entered, it will use domains.csv
print("Enter your output file name (if blank will use default):")
UserFile = str(input("Enter your filename: ") or "domains")
fullFile = UserFile + '.csv'
domainFName = fullFile.format(current_path)
# Here will will specify the output file name. If the file is not created, it will create it
# If the user enters not data, the default will be used, output.csv
print("Enter your output file name (if blank will use default):")
UserOutput = str(input("Enter your filename: ") or "output")
fullOutput = UserOutput + '.csv'
outputFIle = fullOutput.format(current_path)


# Read in all domains from csv into list
with open(domainFName, 'r') as file:
    for line in csv.reader(file):
        case_list.append(line)
        domainAmount += 1
        
print("Starting the resolver:")
print("You have " + str(domainAmount) + " Domains to resolve:")
# THIS IS THE END OF THE CODE FOR WRITING CSV FILES INTO LISTS - LABELED AS #1

# THE CODE BELOW IS WORKING FOR FINDING THE DNS RESOLVERS - LABELED AS #2
# Function for matching domains to DNS resolvers
def dnsResolver (domain):
    try:
        answers = dns.resolver.resolve(domain, 'NS')
        for server in answers:
            dns_list.append(server.target)   
    except:
        dns_list.append("Did Not Resolve")  
       
print("Now resolving domains to their DNS name:")
print("This will take a few minutes. Check out the progress bar for your status:")
print("I have resolved 0% Domains:")

# This code is for finding the percentages for the total amount of domains to find progress status
def percentageFinder(percent, whole):
    return (percent * whole) / 100

def percentGetter(part, whole):
    return (100 * int(part)/int(whole))   

for x in percents:
    percentList.append(int(percentageFinder(x,domainAmount)))
    percentL = percentList
#End code for percentage finding

for firstdomain in case_list:
    for domain in firstdomain:
        dnsResolver(domain)
        if dnsResolver != "Did Not Resolve":
            rd += 1
        else:
            dnresolve += 1
        # Using w+ to overwrite all Domain Names & 
        with open(dnsList,'w+', newline="") as r:
            writers = csv.writer(r)
            writers.writerows(dns_list)
        # This is used for showing the percentage of the matching you have done
        part += 1
        if part in percentL:
            total = int(percentGetter(part, domainAmount))
            print("I Have Resolved {}".format(total) + "%" + " Domains:")
        else:
            pass

        
        
print("Resolving has completed. Statistics Below:")
print("------------------------------------------")



print("You had " + str(rd) + " domains that resolved.")
print("You had " + str(dnresolve) + " domains that did NOT resolve")



# THIS IS THE END OF THE WORKING CODE - LABELED AS #2     
   
# Write the dns Resolver names into a new csv file
print("Now writing your domains & their DNS Name to an Output File:")

with open(outputFile,'w+', newline="\n") as f:
    writer = csv.writer(f, dialect='excel')
    writer.writerow(fields)
    for row in csv_output:
        writer.writerow(row)


print("Writing a backup CSV File")

# Using this to create a backup in case to contain all domains, and all resolvers
# If someone runs the script with a small list of domains, still want to keep a 
# running list of everything in case any questions arise.
# This is done by using 'a' instead of 'w' or 'w+' done above.
with open(backupCSV,'w', newline="") as f:
    writer = csv.writer(f, dialect='excel')
    writer.writerow(fields)
    for row in csv_output:
        writer.writerow(row)
print("Your backup is now done processing. Exiting program")

# Sort the files by keyword, in this case the domain being azure or csc
for r in dns_list:
    if keyAzure in r:
        for x in keyAzure:
            FileName = x
            print(FileName)

exit()