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form表单跳转网页,获取来源referrer失败?

客户有个门户系统,和一个内管系统,需要在门户系统登录后,点击内管系统按钮,单点登录到内管系统。但是门户系统是用form表单跳转到内管系统,内管系统用js的?document.referrer 或者?window.opener.location.href 都无法获取来源url,想问下有没有办法获取在不改变form表单跳转的前提下,用js获取来源url?


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可以考虑自己主动跟一个参数在跳转尾巴里,比如表单触发跳转的时候请求跳转地址是XXXX.com?refer=XXX.com 然后跳过去后用JS拿这个小尾巴的值获取refer


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