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day 37 ajax跨域浏览器同源测略

浏览器的同源策略

允许跨域：

script

img

iframe

不允许跨域：

ajax

跨域ajax

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <h1>T1</h1>
    <input type="button" value="Ajax" onclick="AJAX();">
    <input onclick="Jsonp();" type="button" value="Jsonp" >
    <script type="text/javascript" src="/statics/jquery-3.1.1.js"></script>

    <script>
        function Jsonp() {
            $.ajax({
                url:'http://127.0.0.1:8001/index',
                dataType:'jsonp',
//                jsonp:'callback',
                jsonCallBack:'func'
                
            })
        }
        function ff(arg) {
            console.log(arg)
        }
//        function Jsonp() {
//           var tag=document.createElement('script');
//            tag.src='http://127.0.0.1:8001/index';
//            document.head.appendChild(tag);
//            document.head.removeChild(tag);
//
//        }
        function AJAX() {
            $.ajax({
                url:'/index',
                type:'post',
                data:{'k':'1'},
                success:function (arg) {
                    console.log(arg);
                }
            })
        }
    </script>
</body>
</html>

8002

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

import tornado.ioloop
import tornado.web
import io


class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        # callback=self.get_argument('callback')
        # self.write('%s ([11,22,33]);' % callback)
        self.render('index.html')
    def post(self, *args, **kwargs):
        self.write('t1t1t1t1t1posttttt')



settings = {
    'template_path': 'views',
    'static_path': 'statics',
    'static_url_prefix': '/statics/',
}

application = tornado.web.Application([
    (r"/index", IndexHandler),
], **settings)


if __name__ == "__main__":
    application.listen(8002)
    tornado.ioloop.IOLoop.instance().start()

8002python

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

import tornado.ioloop
import tornado.web
import io
import check_code

class IndexHandler(tornado.web.RequestHandler):
    def get(self):

        self.write('ff([11,22,33,44])')
    def post(self, *args, **kwargs):
        self.write('ff([11,22,33,44])')



settings = {
    'template_path': 'views',
    'static_path': 'statics',
    'static_url_prefix': '/statics/',
}

application = tornado.web.Application([
    (r"/index", IndexHandler),
], **settings)


if __name__ == "__main__":
    application.listen(8001)
    tornado.ioloop.IOLoop.instance().start()

8001python

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原文地址：https://www.cnblogs.com/ezway/p/7183445.html

day 37 ajax跨域 浏览器同源测略

day 37 ajax跨域浏览器同源测略