什么是跨域
当一个请求url的协议、域名、端口三者之间任意一个与当前页面url不同即为跨域
nginx解决跨域请求
nginx.config配置
server {
listen 80;
server_name my.cn.com;
location / {
proxy_pass http://test.cn.com:8081/test;
index index.html index.htm;
}
location /A {
proxy_pass http://a.a.com:8082/A;
index index.html index.htm;
}
location /B {
proxy_pass http://b.b.com:8083/B;
ndex index.html index.htm;
}
}
- 当浏览器访问:my.cn.com:80 nginx会转发到 http://test.cn.com:8081/test;
- 当浏览器访问:my.cn.com:80/A nginx会转发到 http://a.a.com:8082/A;
- 当浏览器访问:my.cn.com:80/B nginx会转发到 http://b.b.com:8083/B;
这种nginx解决方案跟springCloud中的zuul(网关)一样。根据 location /*** 转发至不同的请求去。
更多详细localtion的正则匹配规则可参考:nginx配置location总结及rewrite规则写法
网上还有另外一种nginx解决跨域请求的方案:
此方案未验证。。。。。
在nginx.conf中启用COSR的参考配置:
#
# Wide-open CORS config for nginx
#
location / {
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Allow-Origin' '*';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
#
# Custom headers and headers various browsers *should* be OK with but aren't
#
add_header 'Access-Control-Allow-Headers' 'DNT,X-CustomHeader,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
#
# Tell client that this pre-flight info is valid for 20 days
#
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain charset=UTF-8';
add_header 'Content-Length' 0;
return 204;
}
if ($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';
}
}
这样就可以实现GET,POST,OPTIONS的跨域请求的支持
也可以 add_header Access-Control-Allow-Origin http://test.51testing.com; --指定允许的url;
其余解决跨域问题的手段有:
- jsonp
- httpclient进行请求内部转发
- 使用http响应头允许跨域设置
- 使用网管zuul