Django2支持跨域方法

让django支持跨域的原理比较简单，让django的http返回头中支持来源域名就OK了，通过安装django-cors-headers插件并设置相关参数即可实现，方法如下：

1.安装django-cors-headers

pip3 install django-cors-headers

2.修改settings.py

• INSTALLED_APPS中增加

  INSTALLED_APPS = [
      'django.contrib.admin',
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      'corsheaders',                  #新增项
  ]

• MIDDLEWARE中增加

  MIDDLEWARE = [
      'django.middleware.security.SecurityMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'corsheaders.middleware.CorsMiddleware',             #新增项
      'django.middleware.common.CommonMiddleware',         
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      'django.middleware.clickjacking.XFrameOptionsMiddleware',
  ]

• 文件末尾增加如下行设置

  # 跨域增加忽略
  CORS_ALLOW_CREDENTIALS = True
  CORS_ORIGIN_ALLOW_ALL = True
  CORS_ORIGIN_WHITELIST = (
      '*'
  )

3.验证跨域是否生效

从localhost:8080网站通过axios发送跨域请求到工作于8888端口的django，请求的返回头中增加了如下内容：

　　Access-Control-Allow-Credentials: true

　　Access-Control-Allow-Origin: http://localhost:8080

axios工作正常~