Nginx跨域设置Access-Control-Allow-Origin无效的解决办法

nginx 版本 1.11.3

使用大家说的以下配置，验证无效，跨域问题仍然存在

add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Methods' 'GET,POST';

使用以下配置，生效。

if ($request_method = 'OPTIONS') {
 add_header 'Access-Control-Allow-Origin' '*';
 add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
 add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
 add_header 'Access-Control-Max-Age' 1728000;
 add_header 'Content-Type' 'text/plain charset=UTF-8';
 add_header 'Content-Length' 0;
 return 204;
}
if ($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';
}

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