Django开发服务器HTTPS访问报错400：仅支持HTTP请求

API 探路者

2026-7-27

问题描述

执行python manage.py runserver启动Django网站后，服务器返回地址http://127.0.0.1:8000/，但使用Google Chrome访问时，浏览器提示：

此网站无法提供安全连接 127.0.0.1 发送了无效内容

同时Anaconda终端出现以下错误：

Code 400, message Bad request version ('ª')
You're accessing the development server over HTTPS, but it only supports HTTP.

之前用相同方法访问正常，怀疑是settings.py配置导致问题，以下是当前settings.py代码：

import os
from pathlib import Path
import django_heroku     # to host heroku
import dj_database_url   # to host heroku
from decouple import config  # to host heroku

# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent


# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/3.2/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'django-insecure-d44=xloa_ngo&moz%cujtvuqpr7ub)hfbqss6$xnubj031q3!9'

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

ALLOWED_HOSTS = ['192.168.16.130', '127.0.0.1', 'localhost', '0.0.0.0']

SECURE_SSL_REDIRECT=False
SESSION_COOKIE_SECURE=False
CSRF_COOKIE_SECURE=False

# !!! Added for CSRF protection

CORS_ORIGIN_ALLOW_ALL=True
#CORS_ALLOW_ALL_ORIGINS=True

CORS_ALLOWED_ORIGINS = [ 
    "http://0.0.0.0:8000",
    "http://localhost:8000",
    "http://192.168.16.130:8000",
    "http://127.0.0.1:8000",
]

CSRF_TRUSTED_ORIGINS = [
    "http://0.0.0.0:8000",
    "http://localhost:8000",
    "http://192.168.16.130:8000",
    "http://127.0.0.1:8000"
]

CORS_ALLOW_METHODS = [
'DELETE',
'GET',
'OPTIONS',
'PATCH',
'POST',
'PUT',
]

CORS_ALLOW_HEADERS = [
    'accept',
    'accept-encoding',
    'authorization',
    'content-type',
    'dnt',
    'origin',
    'user-agent',
    'x-csrftoken',
    'x-requested-with',
]


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'corsheaders',                      # !!! Added for CSRF 
    'hospital'
]

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',                # !!! Added for CSRF
    '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',
    'django.middleware.common.CommonMiddleware',               # !!! Added for CSRF 
]

ROOT_URLCONF = 'hospital.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates')],
        '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',
            ],
        },
    },
]

WSGI_APPLICATION = 'hospital.wsgi.application'


# Database
# https://docs.djangoproject.com/en/3.2/ref/settings/#databases

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

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'aws_db',
        'HOST': 'database-2.cxjd4rzryhvg.ap-southeast-1.rds.amazonaws.com',
        'PORT': '5430',
        'USER': 'jolinsiow_db',
        'PASSWORD': 'jolinsiow'
    }
}

'''
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2',
        'NAME': 'db_pharmUI_v3',
        'HOST': 'localhost',
        'PORT': '5432',
        'USER': 'postgres',
        'PASSWORD': 'jolinsiow'
    }
}
'''

# Password validation
# https://docs.djangoproject.com/en/3.2/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/3.2/topics/i18n/

LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True


# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.2/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    os.path.join(BASE_DIR, 'static'),
]

# Default primary key field type
# https://docs.djangoproject.com/en/3.2/ref/settings/#default-auto-field

DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
# Capture exceptions
REST_FRAMEWORK = {
    'EXCEPTION_HANDLER': 'hospital.exception.custom_exception_handler'
}

解决方案

核心问题是浏览器通过HTTPS协议访问了仅支持HTTP的Django开发服务器，按以下步骤排查修复：

检查访问地址：确保在Chrome地址栏输入的是http://127.0.0.1:8000/，而非https://开头。若Chrome自动跳转HTTPS，可手动输入完整HTTP地址，或清除该域名的浏览器缓存及安全设置。

修正settings.py配置：
你的配置中SECURE_SSL_REDIRECT=False设置正确，不会强制跳转HTTPS，但MIDDLEWARE列表重复添加了django.middleware.common.CommonMiddleware，这可能导致请求处理异常。删除重复的该行，修正后的MIDDLEWARE如下：

MIDDLEWARE = [
    'corsheaders.middleware.CorsMiddleware',
    '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',
]

其他排查动作：
- 重启Django开发服务器，确保配置修改生效；
- 尝试用其他浏览器（如Firefox）访问，排除Chrome自身设置问题；
- 检查是否存在残留的HTTPS相关环境变量（如HTTPS=on），避免服务器误判请求协议。

内容的提问来源于stack exchange，提问作者Jolin