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跨域
作者: 图恩
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编程开发
阅读: 874
发布时间： 2020-04-22 04:16:04
同源策略（Same origin policy）是一种约定，它是浏览器最核心也最基本的安全功能，如果缺少了同源策略，则浏览器的正常功能可能都会受到影响。可以说Web是构建在同源策略基础之上的，浏览器只是针对同源策略的一种实现。 不受同源策略限制的，
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5种跨域的方法 jsonp 不是ajax，利用 <script></script>标签可跨域的特性 <script src="http://www.abc.com/?data=name&callback=jsonp" charset="utf-8"></script> <script type="text/javascript"> jsonp({ data: { }, }); </script> hash // 利用hash，场景是当前页面 A 通过iframe或frame嵌入了跨域的页面 B // 在A中伪代码如下： var B = document.getElementsByTagName('iframe'); B.src = B.src + '#' + 'data'; // 在B中的伪代码如下 window.onhashchange = function() { var data = window.location.hash; }; postMessage h5 新特性 // 窗口A(http:A.com)向跨域的窗口B(http:B.com)发送信息 Bwindow.postMessage('data', 'http://B.com'); // 在窗口B中监听 Awindow.addEventListener('message', function(event) { console.log(event.origin); console.log(event.source); console.log(event.data); }, false); WebSocket h5 新特性 var ws = new WebSocket('wss://echo.websocket.org'); ws.onopen = function(evt) { console.log('Connection open ...'); ws.send('Hello WebSockets!'); }; ws.onmessage = function(evt) { console.log('Received Message: ', evt.data); ws.close(); }; ws.onclose = function(evt) { console.log('Connection closed.'); }; CORS 跨域资源共享 fetch('/some/url/', { method: 'get', }).then(function(response) { }).catch(function(err) { // 出错了，等价于 then 的第二个参数，但这样更好用更直观 }); <p style='opacity:0'><a href='https://www.dsiab.com' style='cursor:unset'>本文章由javascript技术分享原创和收集</a></p></div></div><div class="post-footer" data-v-4d109b7c><!----><div class="copy-desc" data-v-4d109b7c><div data-v-4d109b7c>本文由作者创作或收集，内容引用如有问题请联系站长处理。</div><div data-v-4d109b7c> 转载请注明原文及出处：<a class="quote" href="https://www.dsiab.com/post/aa266626-68fd-44f8-abc7-9b200db9a99f" data-v-4d109b7c>跨域</a></div></div></div><div class="postRecommend" style="display:none;" data-v-4d109b7c><div class="common-title" data-v-a72f5a0e>推荐阅读 <i class="active-line" data-v-a72f5a0e></i></div><ul><!--[--><!--]--></ul></div><div class="comments" data-v-4d109b7c data-v-f2b74ff7><div class="add-comment" data-v-f2b74ff7><h3 data-v-f2b74ff7>发表评论<span style="color:gray;font-size:1rem;" data-v-f2b74ff7> (审核通过后显示评论)：</span></h3><form class="el-form 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