0x0前言
- jsonp返回值解决get请求
- iframe解决跨域访问
- Nginx 解决CORS
0x1 Nginx配置
0x1_1简单配置:
server { listen 80; server_name b.com; location /{ add_header 'Access-Control-Allow-Origin' 'http://a.com'; add_header 'Access-Control-Allow-Credentials' 'true'; add_header 'Access-Control-Allow-Methods' 'GET'; } }
- add_header:授权从a.com的请求
- 第二条add_header:当该标志为真时,响应于该请求是否可以被暴露
- 第三条add_header:指定请求的方法,可以是GET,POST,PUT,DELETE,HEAD
同样支持通配符,如允许来自任何域的请求:
server { listen 80; server_name b.com; location /{ Access-Control-Allow-Origin: * } }
0x1_2 高级配置
location / { if ($request_method = 'OPTIONS') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; # # Custom headers and headers various browsers *should* be OK with but aren't # add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; # # Tell client that this pre-flight info is valid for 20 days # add_header 'Access-Control-Max-Age' ; add_header 'Content-Type' 'text/plain charset=UTF-8'; add_header 'Content-Length' 0; return 204; } if ($request_method = 'POST') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } if ($request_method = 'GET') { add_header 'Access-Control-Allow-Origin' '*'; add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type'; } }
因为POST跨域请求会先发一次OPTIONS的嗅探请求,所有有的场景涉及到设置OPTIONS。
0x2 参考文献
- https://developer.mozilla.org/en-US/docs/Web/HTTP/Access_control_CORS
- http://enable-cors.org/server_nginx.html
- http://www.nodeclass.com/articles/78953
0x3关于我
- @Author:Zemo
- @Email:zemochen#126.com
- 欢迎转载,让更多的人学到东西
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