当我使用send_email时，使用'idna'编解码器编码失败（UnicodeError：标签为空或太长）

Question

我在django项目中的联系表有问题。

UnicodeError at /contact
encoding with 'idna' codec failed (UnicodeError: label empty or too long)

Request Method: POST
Request URL:    http://127.0.0.1:8000/contact
Django Version: 3.0.4
Exception Type: UnicodeError
Exception Value:    
encoding with 'idna' codec failed (UnicodeError: label empty or too long)
Exception Location: C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\utils\encoding.py in punycode, line 223
Python Executable:  C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\python.exe
Python Version: 3.8.2
Python Path:    
['D:\\Développement\\django-simple-blog',
 'C:\\Users\\Florent\\AppData\\Local\\Programs\\Python\\Python38-32\\python38.zip',
 'C:\\Users\\Florent\\AppData\\Local\\Programs\\Python\\Python38-32\\DLLs',
 'C:\\Users\\Florent\\AppData\\Local\\Programs\\Python\\Python38-32\\lib',
 'C:\\Users\\Florent\\AppData\\Local\\Programs\\Python\\Python38-32',
 'C:\\Users\\Florent\\AppData\\Local\\Programs\\Python\\Python38-32\\lib\\site-packages']
Server time:    sam, 7 Mar 2020 23:18:11 +0000

我对联系表格有此看法：

def contact(request):
    if request.method == 'POST':
        form = ContactForm(request.POST)
        if form.is_valid():
            data = form.cleaned_data
            plaintext = render_to_string('emails/contact.txt', { 'data': data })
            html = render_to_string('emails/contact.html', { 'data': data })

            send_mail(subject = 'Demande de contact', message = plaintext, html_message = html , from_email = data['email'], recipient_list = [ settings.CONTACT_EMAIL ])

            messages.success(request, 'Votre message à été envoyé avec succès.')
        else:
            messages.error(request, 'Une erreur s\'est produite.')
    else:
        form = ContactForm()

    data = { 'form': form }
    return render(request, 'contact.html', data)

这是我的进口商品：

from django.shortcuts import render
from django.contrib import messages
from django.core.mail import send_mail
from django.template.loader import render_to_string
from django.conf import settings

from blog.models import Post, Category
from .models import ContactForm

当然我在我的settings.py中有CONTACT_EMAIL以及电子邮件地址。

如果我删除send_mail（）视图，则不会出现错误，因此问题所在的行，但是我当然需要这个。

我已经尝试删除所有用于纯数据的变量，但是，同样的问题，它不起作用。

感谢您阅读本内容。希望它会尽快得到解决，并会帮助一些遇到相同问题的人。

编辑：完成回溯：

Environment:


Request Method: POST
Request URL: http://127.0.0.1:8000/contact

Django Version: 3.0.4
Python Version: 3.8.2
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'django.contrib.humanize',
 'compressor',
 'crispy_forms',
 'blog']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\encodings\idna.py", line 165, in encode
    raise UnicodeError("label empty or too long")

The above exception (label empty or too long) was the direct cause of the following exception:
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
    response = get_response(request)
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "D:\Développement\django-simple-blog\src\views.py", line 29, in contact
    send_mail(subject = 'Demande de contact', message = plaintext, html_message = html , from_email = data['email'], recipient_list = [ settings.CONTACT_EMAIL ])
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\mail\__init__.py", line 60, in send_mail
    return mail.send()
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\mail\message.py", line 276, in send
    return self.get_connection(fail_silently).send_messages([self])
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\mail\backends\smtp.py", line 102, in send_messages
    new_conn_created = self.open()
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\mail\backends\smtp.py", line 53, in open
    connection_params = {'local_hostname': DNS_NAME.get_fqdn()}
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\mail\utils.py", line 18, in get_fqdn
    self._fqdn = punycode(socket.getfqdn())
  File "C:\Users\Florent\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\utils\encoding.py", line 223, in punycode
    return domain.encode('idna').decode('ascii')

Exception Type: UnicodeError at /contact
Exception Value: encoding with 'idna' codec failed (UnicodeError: label empty or too long)

settings.py

"""
Django settings for src project.

Generated by 'django-admin startproject' using Django 3.0.4.

For more information on this file, see
https://docs.djangoproject.com/en/3.0/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.0/ref/settings/
"""

import os

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.0/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'r6e#d8$1rh@mrd7xf$rx(uj3jc!@h%#yg-ulvbz6c_ei$$2gp8'

# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True

ALLOWED_HOSTS = []


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.humanize',

    'compressor',
    'crispy_forms',

    'blog',
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

ROOT_URLCONF = 'src.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [
            os.path.join(BASE_DIR, 'templates'), # Dossier template à la racine de l'application
        ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',

                'blog.context_processors.category.category_list',
            ],
            'builtins': [
                'django.templatetags.static',
            ],
        },
    },
]

WSGI_APPLICATION = 'src.wsgi.application'


# Database
# https://docs.djangoproject.com/en/3.0/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
    }
}


# Password validation
# https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]


# Internationalization
# https://docs.djangoproject.com/en/3.0/topics/i18n/

LANGUAGE_CODE = 'fr-FR'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

STATICFILES_FINDERS = [
    'compressor.finders.CompressorFinder',
]

COMPRESS_PRECOMPILERS = (
    ('text/x-scss', 'django_libsass.SassCompiler'),
)

CRISPY_TEMPLATE_PACK = 'bootstrap4' # Formulaire de contact en bootstrap
CONTACT_EMAIL = '[email protected]' # Email à laquelle envoyer les formulaires de contact
MESSAGE_STORAGE = 'django.contrib.messages.storage.session.SessionStorage' # Message flash

# SMTP Email config
EMAIL_HOST = 'smtp.mailtrap.io'
EMAIL_HOST_USER = 'ab34865e2d8f19'
EMAIL_HOST_PASSWORD = '***********'
EMAIL_PORT = '2525'

我在那里打印数据：

            print(plaintext)
            print(html)
            print(data['email'])
            print(settings.CONTACT_EMAIL)

所有人都工作

Answer 1