Nginx配置Https訪問，反向代理tomcat，發現兩個問題：

（1）redirect之後的schema全變成了http。

（2）request.getSchema()全部返回http。

server {  
    listen 80 default_server;  
  
    location / {  
        proxy_pass http://127.0.0.1:8080;  
        proxy_redirect http:// $scheme://;  
    }  
}  

nginx上配置：

proxy_set_header       Host $host;  
proxy_set_header  X-Real-IP  $remote_addr;  
proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;  
proxy_set_header X-Forwarded-Proto  $scheme;  
 

tomcat上配置：

<Engine >
	<Valve className="org.apache.catalina.valves.RemoteIpValve"  
	remoteIpHeader="X-Forwarded-For"  
	protocolHeader="X-Forwarded-Proto"  
	protocolHeaderHttpsValue="https"/> 
</Engine >

重啟，over！

關於 RemoteIpValve,有興趣的同學可以閱讀下 ：http://tomcat.apache.org/tomcat-6.0-doc/api/org/apache/catalina/valves/RemoteIpValve.html

Tomcat port of mod_remoteip, this valve replaces the apparent client remote IP address and hostname for the request with the IP address list presented by a proxy or a load balancer via a request headers (e.g. "X-Forwarded-For").   
Another feature of this valve is to replace the apparent scheme (http/https) and server port with the scheme presented by a proxy or a load balancer via a request header (e.g. "X-Forwarded-Proto").