位于/ 'NoneType‘对象的AttributeError没有属性'_get_qnames_to_try’

Question

更新:我做了一些更改，现在我得到了这个'NoneType‘对象没有'is_absolute’属性。。我一直在一个项目中工作，我需要打印一个由用户输入的主机名的Ip地址在html页面上的文本字段。我在使用Django有点新奇。我得到这个错误:找不到qname。请帮帮我！

Heres Views.py

from django.shortcuts import render
import dns.resolver


def index(request):
    search = request.POST.get('search')
    # print('search='+search)
    ip_address = dns.resolver.Resolver.resolve(search, "A")
    context = {"ip_address": ip_address}
    return render(request, 'index.html', context)

更新: views.py

from django.shortcuts import render
import dnspython as dns
import dns.resolver


def index(request):
    search = request.POST.get('search')
    # print(search)
    # ip_address = dns.resolver.Resolver.resolve(search, "A")

    ip_address = dns.resolver.Resolver()
    answers = ip_address.resolve(search, "A")

    context = {"ip_address": answers}
    return render(request, 'index.html', context)

index.html

{% extends 'base.html' %}


{% block title %} IP Finder {% endblock %}


{% block body %}


<div class="container">
    <br>
    <br>

    <center>
        <h1 style="font-family:'Courier New'">Django NSLookup</h1>
    <br>
    <br>

    <form action="{% url 'index' %}" method="post">
        {% csrf_token %}

        <div class="form-group">

            <label>

                <input type="text" class="form-control" name="search" placeholder="Enter website">

            </label>


        </div>
        <input type="submit" class="btn btn-primary" value="Search">
        <p></p>
        <p>Click on the "Choose File" button to upload a file:</p>
        <form action="/action_page.php">
            <input type="file" id="myFile" name="filename">
            <input type="submit">
        </form>

    </form>
    </center>


    <br>
    <br>


    <p>IP Address is : {{ip_address}}</p>


</div>

{%  endblock %}

错误回溯：

> Traceback (most recent call last):   File
> "C:\Python39\lib\site-packages\django\core\handlers\exception.py",
> line 47, in inner
>     response = get_response(request)   File "C:\Python39\lib\site-packages\django\core\handlers\base.py", line
> 181, in _get_response
>     response = wrapped_callback(request, *callback_args, **callback_kwargs)   File "C:\Users\vassu\PycharmProjects\IPFinderA\IPApp\views.py", line 20, in
> index
>     ip_address = dns.resolver.Resolver.resolve(search, "A")   File "C:\Python39\lib\site-packages\dns\resolver.py", line 1159, in resolve
>     resolution = _Resolution(self, qname, rdtype, rdclass, tcp,   File "C:\Python39\lib\site-packages\dns\resolver.py", line 531, in __init__
>     self.qnames_to_try = resolver._get_qnames_to_try(qname, search) AttributeError: 'NoneType' object has no attribute
> '_get_qnames_to_try' [01/Sep/2021 01:27:27] "GET / HTTP/1.1" 500 73040

更新:有没有人能帮我找出错误的原因

​

​

Answer 1

你能试着替换掉：

ip_address = dns.resolver.Resolver.resolve(search, "A")

出自：

try:
    ip_address = dns.resolver.resolve(search, 'A').rrset[0].to_text()
except dns.resolver.NoAnswer:
    ip_address = 'No answer'