#跨域

Cross-Origin Resource Sharing (CORS)

Published at February 25, 2019 ·  1 min read

CORS 跨域资源访问的详细介绍,域(origin)的定义为域名、协议和端口,也就是说三者其中之一发生改变则需要面临 CORS 问题。服务端需要根据请求的 origin 来判断是否在允许的范围内而决定是放行还是拒绝。在目前较多的 web 框架中,prefilighted requests 则逐渐成为主流,由客户端先通过 “OPTION” 方法发送一个请求,将请求的方法和头放到 header 中发送,服务器端则返回相应的结果,并交由浏览器判断。 Cross-Origin Resource Sharing (CORS)...


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