springboot实现反向代理，监听服务调用

springboot实现反向代理，监听服务调用

已知一个第三方服务，如何在调用这个第三方服务之前，通过反向代理的方式，屏蔽第三方服务地址，并且监听其服务调用情况和做一些其他的事情呢。

1.引入包

            org.mitre.dsmiley.httpproxy
            smiley-http-proxy-servlet
            1.11
        
        
            com.google.guava
            guava
            18.0
        

2.创建配置类

@Configuration
public class SolrProxyServletConfiguration {

    // 读取配置文件中路由设置
    private String servlet_url="/proxy/*";
    // 读取配置中代理目标地址
    private String target_url="https://www.baidu.com";



    @Bean
    public Servlet createProxyServlet(){
        // 创建新的ProxyServlet
        return new MyProxyServlet();
    }
    @Bean
    public ServletRegistrationBean proxyServletRegistration(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(createProxyServlet(), servlet_url);
        //设置网址以及参数
        Map params = ImmutableMap.of("targetUri", target_url,"log", "true");
        registrationBean.setInitParameters(params);

        return registrationBean;
    }
}

3.创建MyProxyServlet类，继承ProxyServlet，并重写doExecute，在doExecute就可以监听服务与控制服务调用了

public class MyProxyServlet extends ProxyServlet {

    @Override
    protected HttpResponse doExecute(HttpServletRequest servletRequest, HttpServletResponse servletResponse, HttpRequest proxyRequest) throws IOException {
        super.doLog=false;//关闭父类的日志输出
        proxyRequest.setHeader("Authorization", "Basic " + "aaaaa");
        HttpResponse response = super.doExecute(servletRequest, servletResponse, proxyRequest);

        System.out.println("这里进行权限控制和输出日志。。。。。。。。。。。，代理地址222222(proxy)："+ servletRequest.getMethod() + " uri: " +  " -- " + proxyRequest.getRequestLine().getUri());



//    设置跨域，暂时不用。
//    String origin = servletRequest.getHeader("origin");
//    response.setHeader("Access-Control-Allow-Origin", origin);
//     response.setHeader("Access-Control-Allow-Credentials", "true");
//    response.setHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
//    response.setHeader("Access-Control-Allow-Headers",
//        "Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin" +
//            ",User-Agent,X-Mx-ReqToken,X-Requested-With");
        return response;
    }


}

4.测试
浏览器访问：http://localhost:8083/proxy 就会被springboot获取，并代理成 https://www.baidu.com

注意，如果访问：http://localhost:8083/proxy/xxxxxx 就会被springboot获取，并代理成 https://www.baidu.com/xxxxxx