弹簧靴：计数页面浏览量 - 执行器

Question

我需要计算每个端点上的视图。我们的想法是为所有端点创建一个通用的请求计数映射，该映射应基于动态输入的终结点返回视图计数。假设有人想要检查 的视图计数。http://localhost:8080/user/101请求映射path = /admin/count & RequestParam = url (Here /user/101)然后创建dynamic Request based on RequestParam http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101Get and Return the Response的动态请求并获取的值(JSON Object)COUNT我坚持如何发送一个到 http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101 并返回它的响应并获取计数值dynamic request@RequestMapping(path="/admin/count",method=RequestMethod.POST)public JSONObject count(@RequestParam(name="url") final String url)//@PathVariable(name="url") final String url{       String finalURL = "http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:" + url + "";    return sendRequestToURL(finalURL);  }@RequestMapping(path="/{finalURL}",method=RequestMethod.GET)public JSONObject sendRequestToURL(@PathVariable("finalURL") String url){    //How to return the response Here}这就是我在直接触发URL时得到的获取： http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101

Answer 1

这个想法是，您将从用户获取端点以显示视图计数，这将使用@RequestParam完成。 根据您的要求Based on the request endPoint create the URLtoMap

(i.e methods, status, outcome, exception etc, e.g. http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:/user/101&tag=method:GET).

@RequestMapping(path="/admin/count",method=RequestMethod.POST)

    public int count(@RequestParam(name="endPoint") final String endPoint) throws IOException, JSONException

    {

        final String URLtoMap = "http://localhost:8080/actuator/metrics/http.server.requests?tag=uri:" + endPoint + "";

        return sendRequestToURL(URLtoMap);

    }

现在基于发送请求使用和获取输出使用。当我使用Spring Security时，我被重定向到登录页面。为了解决这个问题，我在SecurityConfig文件中添加了antMatchers，如下所示。如果您面对那么请参考这个URLtoMapHttpURLConnectionBufferedReaderJSONException: Value of type java.lang.String cannot be converted to JSONObject

public int sendRequestToURL(@PathVariable("URLtoMap") String URLtoMap) throws IOException, JSONException

{

      int count = 0;

      StringBuilder result = new StringBuilder();

      URL url = new URL(URLtoMap);

      HttpURLConnection conn = (HttpURLConnection) url.openConnection();

      conn.setRequestMethod("GET");

      BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));

      String line;

      while ((line = rd.readLine()) != null) {

         result.append(line);

      }

      rd.close();

      try {

            JSONObject jsonObject =new JSONObject(result.toString().replace("\"", "")); 

            JSONObject jsonCountObject = new JSONObject(jsonObject.getJSONArray("measurements").get(0).toString());

            count =(int) jsonCountObject.get("value");

        }

        catch (JSONException e) {

            e.printStackTrace();

        }

      return count;

}

安全配置

@Override

        protected void configure(HttpSecurity http) throws Exception{

             http

             .csrf().disable()

             .authorizeRequests().antMatchers("/login").permitAll()

             .antMatchers(HttpMethod.GET,"/actuator/**").permitAll() 

             .antMatchers(HttpMethod.POST,"/actuator/**").permitAll() 

}

啪.xml

<dependency>

    <groupId>com.fasterxml.jackson.core</groupId>

    <artifactId>jackson-core</artifactId>

</dependency>

<dependency>

    <groupId>com.fasterxml.jackson.core</groupId>

    <artifactId>jackson-databind</artifactId>

</dependency>

<dependency>

  <groupId>org.json</groupId>

  <artifactId>json</artifactId>

  <version>20090211</version>

</dependency>

导入正确的软件包

import org.json.JSONException;

import org.json.JSONObject;

import java.net.URL;

import java.net.HttpURLConnection;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

Answer 2

所以你想要封装actuator/metrics/admin/count

在Java中调用Rest API的方法和库有很多

我将添加最简单的一个

类似的东西

public JSONObject sendRequestToURL(@PathVariable("finalURL") String urlToRead)

{

      StringBuilder result = new StringBuilder();

      URL url = new URL(urlToRead);

      HttpURLConnection conn = (HttpURLConnection) url.openConnection();

      conn.setRequestMethod("GET");

      BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));

      String line;

      while ((line = rd.readLine()) != null) {

         result.append(line);

      }

      rd.close();

      return new JSONObject(result.toString());  // org.json

}

编辑 1：

你快到了。只需要将字符串解析为 JSONObject。试试这个也许

String strJson = result.toString().replace("\\\"","'");

JSONObject jo = new JSONObject(strJson.substring(1,json.length()-1));

return jo;

编辑 2：

我猜你有Spring Security。

当您在内部调用API时，Spring将其视为需要身份验证的外部调用。

作为一种解决方法，您可以从安全上下文中排除 API。/actuator

@Override

protected void configure(HttpSecurity http) throws Exception {

    http.csrf().disable().authorizeRequests()

     .antMatchers("/actuator*").permitAll()

     ...

}

或 XML 格式

<security:http  auto-config="true"  use-expressions="true"   >

    <security:intercept-url pattern="/actuator*" access="permitAll"/>

    ...

</security:http>

希望Spring安全将忽略此URL，您将不会获得登录表单。