nginx header信息

   # 关键头部设置
        proxy_set_header Host $host;                    # 保持原始域名
        proxy_set_header X-Real-IP $remote_addr;        # 传递真实客户端IP
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  # 记录代理链
        proxy_set_header X-Forwarded-Proto $scheme;     # 传递原始协议(https)