Flask

安装插件

pip install flask-cors

使用 CORS函数配置全局路由

from flask_cors import *

app = Flask(__name__)
CORS(app, supports_credentials=True)

from flask_cors import CORS
app = Flask(__name__,)
# r‘/*‘ 是通配符，让本服务器所有的URL 都允许跨域请求
CORS(app, resources=r‘/*‘)
# 上传文件
@uploadFiles.route(‘/upload‘, methods=[‘POST‘])
def uploadFile():
	result_text = {"statusCode": 200,"message": "文件上传成功"}
	response = make_response(jsonify(result_text))
    response.headers[‘Access-Control-Allow-Origin‘] = ‘*‘
    response.headers[‘Access-Control-Allow-Methods‘] = ‘OPTIONS,HEAD,GET,POST‘
    response.headers[‘Access-Control-Allow-Headers‘] = ‘x-requested-with‘
    return response

Django

安装插件

pip install django-cors-headers

添加APP

INSTALLED_APPS = (
    ‘corsheaders‘,
)

添加中间件

MIDDLEWARE = [
    ‘corsheaders.middleware.CorsMiddleware‘, #最好添加至第一行
]

配置白名单

#单个配置
CORS_ORIGIN_WHITELIST  =(
     ‘ 域名‘,
)
#正则配置:
CORS_ORIGIN_REGEX_WHITELIST  =(r‘^(https?://)?（w+.)?jim.com $‘,)

或者直接允许所有主机跨域

CORS_ORIGIN_ALLOW_ALL = True 默认为False

允许携带cookie

CORS_ALLOW_CREDENTIALS = True

请求头及请求方法的配置：

#默认可以使用的非标准请求头，需要使用自定义请求头时，就可以进行修改
CORS_ALLOW_HEADERS = (
    ‘accept‘,
    ‘accept-encoding‘,
    ‘authorization‘,
    ‘content-type‘,
    ‘dnt‘,
    ‘origin‘,
    ‘user-agent‘,
    ‘x-csrftoken‘,
    ‘x-requested-with‘,
)
#默认请求方法
CORS_ALLOW_METHODS = (
    ‘DELETE‘,
    ‘GET‘,
    ‘OPTIONS‘,
    ‘PATCH‘,
    ‘POST‘,
    ‘PUT‘,
)

防止CSRF

#添加信任的站点 django1.9引入
CSRF_TRUSTED_ORIGINS = (
    ‘change.allowed.com‘,
)

更多配置详情点击这里

Tornado

解决方案

import tornado.web


class BaseHandler(tornado.web.RequestHandler):

    def __init__(self,*args,**kwargs):
        super().__init__(*args,**kwargs)
        self.host = ""
        self.port = ""

        # 在初始化方法中添加设置跨域的方法
        self.set_default_headers()


    # 处理OPTIONS域检请求
    def post(self):
        self.set_status(204)
        self.finish()

    # 设置跨域的具体方法
    def set_default_headers(self):
        super().set_default_headers()
        # 设置允许的请求头
        self.set_header("Access-Control-Allow-Methods","GET,POST,PUT,DELETE,OPTIONS")
        self.set_header("X-XSS-Protecion","1")
        self.set_header("Content-Security-Policy","default-src ‘self‘")
        self.set_header("Access-Control-Allow-Credentials","true")
        # 设置一些自己定义的请求头
        self.set_header("Access-Control-Allow-Headers",
                        "Content-Type,Access-Control-Allow-Headers,X-Auth-Token,Y-Auth-Token"
            )
        self.set_header("Content-Type","application/json; charset=UTF-8")
        # 设置允许本地调试的域名通过！
        self.set_header("Access-Control-Allow-Origin",self.request.headers.get("Origin","http://localhost:9090"))
        # 如果后面的域名设置为 * ，表示允许所有的域名通过
        # self.set_header("Access-Control-Allow-Origin","*")
        # self.set_header("Access-Control-Allow-Origin",self.request.headers.get("Origin","*"))

调用

class InterFaceHandler(BaseHandler):
    def set_default_headers(self):
        self.allowMyOrigin()
    def get(self, *args, **kwargs):
        pass

Python跨域问题解决集合

原文地址：https://www.cnblogs.com/liuyangQAQ/p/14898114.html