Nginx 处理跨域问题

• 常规方式

server {
	location / {
	
		......

		add_header 'Access-Control-Allow-Origin' '*';
		add_header 'Access-Control-Allow-Credentials' 'true';
		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';

		.......		

	}
}

有时候上面的方式会不成功，可以采用下面的方式

server {
	location / {
	
		......

		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';
		}
		
		.......		

	}
}