smiley-http-proxy-servlet 实现springboot 反向代理，结合项目鉴权，安全的引入第三方项目服务

项目中反向代理 集成第三方的服务接口或web监控界面，并实现与自身项目相结合的鉴权方法

依赖 smiley-http-proxy-servlet GitHub链接

  2.0 版开始，代理切换到jakarta servlet-api<!--HTTP 代理 Servlet--><dependency><groupId>org.mitre.dsmiley.httpproxy</groupId><artifactId>smiley-http-proxy-servlet</artifactId><version>2.0</version></dependency>

javax servlet-api 请选择

<dependency><groupId>org.mitre.dsmiley.httpproxy</groupId><artifactId>smiley-http-proxy-servlet</artifactId><version>${smiley-http-proxy-servlet.version}</version><classifier>javax</classifier>
</dependency>

仅仅是接口代理默认官网示例使用即可，参考第二个接口代理。
如果是完整的web监控服务 会出现 静态资源 因路径 加载错误。

以Nginx 以代理Grafana监控平台为例，解决静态资源加载失败、及websocket连接问题

import org.mitre.dsmiley.httpproxy.ProxyServlet;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.filter.HiddenHttpMethodFilter;/*** 本地代理服务** @author Smile*/
@Configuration
public class ProxyServletConfig {/*** 代理Grafana 监控平台*/	@Beanpublic ServletRegistrationBean<ProxyServlet> servletRegistrationBean() {ServletRegistrationBean<ProxyServlet> servletRegistrationBean = new ServletRegistrationBean<>(new ProxyServlet(), "/grafana/*");servletRegistrationBean.addInitParameter(ProxyServlet.P_TARGET_URI, "http://127.0.0.1:9999");servletRegistrationBean.addInitParameter(ProxyServlet.P_LOG, "true");
//       自动处理重定向servletRegistrationBean.addInitParameter(ProxyServlet.P_HANDLEREDIRECTS, "false");
//      保持 COOKIES 不变servletRegistrationBean.addInitParameter(ProxyServlet.P_PRESERVECOOKIES, "true");
//       Set-Cookie 服务器响应标头中保持 cookie 路径不变servletRegistrationBean.addInitParameter(ProxyServlet.P_PRESERVECOOKIEPATH, "true");
//        保持 HOST 参数不变servletRegistrationBean.addInitParameter(ProxyServlet.P_PRESERVEHOST, "true");return servletRegistrationBean;}/***接口代理*/@Beanpublic ServletRegistrationBean<ProxyServlet> servletRegistration() {ServletRegistrationBean<ProxyServlet> servletRegistrationBean = new ServletRegistrationBean<>(new ProxyServlet(), "/one/*","/two/*","three/*");servletRegistrationBean.addInitParameter(ProxyServlet.P_TARGET_URI, "http://localhost:8001/api");servletRegistrationBean.addInitParameter(ProxyServlet.P_LOG, "true");return servletRegistrationBean;}/*** 禁用springboot 自带的 HiddenHttpMethodFilter 防止post提交的form数据流被提前消费* <p>* fix springboot中使用proxyservlet的 bug.* <a href="https://github.com/mitre/HTTP-Proxy-Servlet/issues/83">bugs</a>* <a href="https://stackoverflow.com/questions/8522568/why-is-httpservletrequest-inputstream-empty">bugs</a>** @return */@Beanpublic FilterRegistrationBean<HiddenHttpMethodFilter> disableHiddenHttpMethodFilter() {FilterRegistrationBean<HiddenHttpMethodFilter> registrationBean = new FilterRegistrationBean<>();registrationBean.setFilter(new HiddenHttpMethodFilter());registrationBean.setEnabled(false); // 禁用过滤器return registrationBean;}
}

直接访问grafana代理 springboot项目端口8088报错，静态资源 路径不正确 导致加载失败

解决思路

springboot 代理的/grafana/* 到 http://127.0.0.1:9999
静态资源的访问失败 404或 错误的返回html首页，是因为路径不符合此规则导致代理是失败

proxy_pass http://127.0.0.1:8088/grafana//;
由nginx代理到 // 则问题解决 ，使 /grafana/* 代理规则生效

其他访问的服务调用 nginx的这个代理

nginx配置参考：

 server {listen       8889;server_name  localhost;# grafana websocket地址代理location /api/live/ws {proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection "Upgrade";proxy_set_header X-real-ip $remote_addr;proxy_set_header X-Forwarded-For $remote_addr;proxy_pass http://127.0.0.1:9999;}location / {#add_header Access-Control-Allow-Origin *;add_header Access-Control-Max-Age 1728000;add_header Access-Control-Allow-Methods 'POST,GET,OPTIONS,DELETE,PUT,HEAD,PATCH';add_header Access-Control-Allow-Headers 'satoken,DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';add_header Access-Control-Allow-Origin $http_origin;client_max_body_size 10m;if ($request_method = 'OPTIONS') {return 204;}# grafana支持配置apikey 免登录访问set $auth 'Bearer eyJrIjoiN1pKYlk5akFDZWNoMlVSUEN1YllXdm0yd2VYN2RzZFIiLCJuIjoiYWRtaW5rZXkiLCJpZCI6MX0=';# apiKey设置到header grafana免密访问proxy_set_header Authorization $auth;proxy_pass http://127.0.0.1:8088/grafana//;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;proxy_connect_timeout 600;proxy_read_timeout 600;}}

完美解决问题~~

再看后端 日志 代理已正常

更安全的访问

只需要限制 原服务端口的放行，仅本机可访问，然后项目增加过滤器自行判断权限。

启动类添加@ServletComponentScan扫描WebFilter，增加 Filter

import cn.dev33.satoken.stp.StpUtil;
import jakarta.servlet.*;
import jakarta.servlet.annotation.WebFilter;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.core.annotation.Order;import java.io.IOException;
/*** 过滤器** @author Smile*/
@Order(1)
@WebFilter(filterName = "piceaFilter", urlPatterns = "/grafana/*")
public class ProxyServletFilter implements Filter {@Overridepublic void init(FilterConfig filterConfig) throws ServletException {Filter.super.init(filterConfig);}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {//自行 实现条件判断即可if (StpUtil.isLogin()) {// 用户已登录，继续执行过滤器链filterChain.doFilter(servletRequest, servletResponse);} else {// 用户未登录，可以返回错误信息或重定向到登录页面// 例如，返回 HTTP 401 未授权状态HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;httpResponse.setStatus(HttpServletResponse.SC_UNAUTHORIZED);}}@Overridepublic void destroy() {Filter.super.destroy();}
}

未登录则：

``撒花，收工~~

附：
grafana websocket需要修改custom.ini配置

# allowed_origins is a comma-separated list of origins that can establish connection with Grafana Live.
# If not set then origin will be matched over root_url. Supports wildcard symbol "*".allowed_origins=*
或
allowed_origins = http://127.0.0.1:8889