SpringBoot使用ProxyServlet实现HTTP反向代理

<!-- httpproxy -->
<dependency>
    <groupId>org.mitre.dsmiley.httpproxy</groupId>
    <artifactId>smiley-http-proxy-servlet</artifactId>
    <version>1.11</version>
</dependency>
<!-- guava -->
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>18.0</version>
</dependency>

# 设置代理
proxy:
  servlet_url: /proxybaidu/*
  target_url: https://www.baidu.com

@Configuration
 public class ProxyServletConfiguration {
     /**
      * 读取配置文件中路由设置
      */
    @Value("${proxy.servlet_url}")
     private String servlet_url;
    /**
      * 读取配置中代理目标地址
      */
     @Value("${proxy.target_url}")
    private String target_url;
    @Bean
     public Servlet createProxyServlet() {
         /** 创建新的ProxyServlet */
         return new ProxyServlet();
     }
    @Bean
     public ServletRegistrationBean proxyServletRegistration() {
         ServletRegistrationBean registrationBean = new ServletRegistrationBean(createProxyServlet(), servlet_url);
         //设置网址以及参数
         Map<String, String> params = ImmutableMap.of("targetUri", target_url, "log", "true");
        registrationBean.setInitParameters(params);
         return registrationBean;
    }
  /**
   * fix springboot中使用proxyservlet的 bug.
   *  https://github.com/mitre/HTTP-Proxy-Servlet/issues/83
   *  https://stackoverflow.com/questions/8522568/why-is-httpservletrequest-inputstream-empty
   * @param filter
   * @return  关闭springboot 自带的 HiddenHttpMethodFilter 防止post提交的form数据流被提前消费
   *
   */
　 @Bean
　　public FilterRegistrationBean registration(HiddenHttpMethodFilter filter) {
　　    FilterRegistrationBean registration = new FilterRegistrationBean(filter);
　　    registration.setEnabled(false);
　　   return registration;
　　}
}

@Override
 protected HttpResponse execute(HttpServletRequest servletRequest, HttpServletResponse servletResponse,
HttpRequest proxyRequest) throws IOException {
    //设置header里的授权信息
    proxyRequest.setHeader("Authorization", "Basic " + getWebappBLoginAuth());
    HttpResponse response = super.doExecute(servletRequest, servletResponse, proxyRequest);
 //        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;
     }