tornado django flask 跨域解决办法（cors）

Posted 2020-08-20

XMLHttpRequest cannot load http://www.baidu.com. No ‘Access-Control-Allow-Origin‘ header is present on the requested resource. Origin ‘http://10.16.16.25:9988‘ is therefore not allowed access.

 tornado

 这个就是典型的cors，允许后端允许跨域的方法。第二种方法，反向代理还在实践中

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import tornado.ioloop
import tornado.web
import json


class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        self.render(‘index.html‘)


class AaaHandler(tornado.web.RequestHandler):
    def post(self, *args, **kwargs):
        ret = self.get_argument("k1")
        print(ret)

        self.set_header("Access-Control-Allow-Origin", "*")
        self.set_header("Access-Control-Allow-Headers", "x-requested-with")
        self.set_header(‘Access-Control-Allow-Methods‘, ‘POST, GET, OPTIONS‘)
        self.write(json.dumps("aa"))


settings = {

    ‘template_path‘: ‘views‘,
    ‘static_path‘: ‘static‘,
    ‘static_url_prefix‘: ‘/static/‘,
}

application = tornado.web.Application([
    (r"/index", IndexHandler),
    (r"/aaa", AaaHandler),

], **settings)

if __name__ == "__main__":
    application.listen(8888)
    tornado.ioloop.IOLoop.instance().start()

 Flask

from functools import wraps
from flask import make_response


def allow_cross_domain(fun):
    @wraps(fun)
    def wrapper_fun(*args, **kwargs):
        rst = make_response(fun(*args, **kwargs))
        rst.headers[‘Access-Control-Allow-Origin‘] = ‘*‘
        rst.headers[‘Access-Control-Allow-Methods‘] = ‘PUT,GET,POST,DELETE‘
        allow_headers = "Referer,Accept,Origin,User-Agent"
        rst.headers[‘Access-Control-Allow-Headers‘] = allow_headers
        return rst
    return wrapper_fun



@app.route(‘/hosts/‘)
@allow_cross_domain
def domains():
    pass

django

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from django.shortcuts import render
from django.shortcuts import redirect

# Create your views here.

from app01 import models
import datetime
import json
from django.shortcuts import HttpResponse
from infrastructure.model.enterprise_news_data import Enterprise_news_Data
from infrastructure.model.enterprise_news_data import Enterprise_News_Id_Info_Data
from infrastructure.public import status_info
from django.views.decorators.csrf import csrf_exempt

@csrf_exempt
def enterprise_news(request):
    """
    企业信息
    :param request:
    :return:
    """
    if request.method == ‘POST‘:
        ret = Enterprise_news_Data().select_enterprise_news()
        return_status = status_info.api_status()
        return_status.status["status"] = 0
        return_status.status["message"] = "成功"
        return_status.status["return_info"] = ret
        print(return_status.status)
        # return HttpResponse(json.dumps(ret))
        response = HttpResponse(json.dumps(return_status.status))
        response["Access-Control-Allow-Origin"] = "*"
        return response
    else:
        return HttpResponse()