营销型网站设计案例,合肥微信网站,会计公司网站模板,重庆网站开发设计公司springboot单机服务基于过滤器Filter实现第三方服务器接口请求代理功能 一、前言二、解决思路三、基于gateway实现四、基于过滤器Filter实现五、问题总结 **注#xff1a;本文源码获取或者更多资料#xff0c;关注公众号#xff1a;技术闲人**一、前言
在项目开发时会遇到w… springboot单机服务基于过滤器Filter实现第三方服务器接口请求代理功能 一、前言二、解决思路三、基于gateway实现四、基于过滤器Filter实现五、问题总结 **注本文源码获取或者更多资料关注公众号技术闲人**一、前言
在项目开发时会遇到web端/接口请求第三方服务接口的场景对web请求来说最后请求的服务地址是一个避免跨域问题在微服务场景经常使用gateway等网关服务实现或者使用nginx代理组件实现但是不同三方服务有不同的鉴权要求但是后端服务最好有相同的鉴权
二、解决思路
在非微服务架构和三方不同鉴权接口的服务场景下通过过滤器Filter实现请求转发并使用适配器设计模式兼容不同的三方服务请求鉴权减少重复代码开发也能监控所有的服务请求并对所有请求做限流、统计等操作
三、基于gateway实现
在没有spring-boot-starter-web依赖的场景下可以使用gatewaySpring MVC基于Servlet的Web应用程序和Spring Cloud Gateway基于反应式编程的API网关但是这两个组件是不兼容的。Spring Cloud Gateway是专为反应式编程设计的使用Spring WebFlux作为底层框架而Spring MVC则基于Servlet API。
gateway实现代码
package com.sk.proxytest;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;SpringBootApplication
public class ProxyTestApplication {public static void main(String[] args) {SpringApplication.run(ProxyTestApplication.class, args);}Beanpublic RouteLocator myRoutes(RouteLocatorBuilder builder) {return builder.routes().route(p - p.path(/test/**).uri(http://127.0.0.1:8089/api)).build();}}四、基于过滤器Filter实现
本文主要使用过滤器Filter实现既能控制代理请求又能最少开发量
GET请求结果 POST请求结果 实现源码
ProxyFilter.java
package com.sk.proxytest.proxy;import com.sk.proxytest.proxy.bean.ProxyParam;
import com.sk.proxytest.proxy.bean.ProxyResult;
import com.sk.proxytest.proxy.strategy.ProxyHandleService;
import com.sk.proxytest.proxy.strategy.ProxyHandleStrategyFactory;
import com.sk.proxytest.proxy.strategy.ProxyStrategyContext;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;import javax.annotation.Resource;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Map;Slf4j
Configuration
WebFilter(filterName ProxyFilter, urlPatterns /proxy/*)
public class ProxyFilter implements Filter {Resourceprivate RestTemplate restTemplate;Overridepublic void init(FilterConfig filterConfig) throws ServletException {Filter.super.init(filterConfig);}Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {HttpServletRequest request (HttpServletRequest) servletRequest;HttpServletResponse response (HttpServletResponse) servletResponse;String proxyType request.getHeader(proxy-type);ProxyStrategyContext proxyStrategyContext new ProxyStrategyContext();ProxyHandleService proxyHandleService ProxyHandleStrategyFactory.getProxyHandleStrategy(proxyType);proxyStrategyContext.setProxyHandleStrategy(proxyHandleService);ProxyResult proxyResult proxyStrategyContext.handleProxy(new ProxyParam());boolean flag true;if (null ! proxyResult) {PrintWriter writer null;try {String body IOUtils.toString(request.getInputStream());HttpEntity? entity new HttpEntity(body, proxyResult.getHeaders());String url proxyResult.getProxyUrl() getNewUrl(request);log.info(-----------new-url:{}, url);ResponseEntityString responseEntity restTemplate.exchange(url, HttpMethod.resolve(request.getMethod()), entity, String.class);response.setStatus(responseEntity.getStatusCodeValue());writer response.getWriter();writer.write(responseEntity.getBody());writer.flush();flag false;} catch (Exception e) {log.error(------error:{}, e);} finally {if (writer ! null) {writer.close();}}}if (flag) {chain.doFilter(request, response);}}Overridepublic void destroy() {Filter.super.destroy();}//获取被代理的url和参数private String getNewUrl(HttpServletRequest request) {String proxyUrl request.getRequestURI().replace(/proxy, );MapString, String[] parameterMap request.getParameterMap();int i 0;for (Map.EntryString, String[] entry : parameterMap.entrySet()) {String key entry.getKey();String value entry.getValue()[0];if (i 0) {proxyUrl proxyUrl ? key value;} else {proxyUrl proxyUrl key value;}}return proxyUrl;}
}ProxyHandleService.java
package com.sk.proxytest.proxy.strategy;import com.sk.proxytest.proxy.bean.ProxyParam;
import com.sk.proxytest.proxy.bean.ProxyResult;public interface ProxyHandleService {ProxyResult proxyHandle(ProxyParam proxyParam);}AlibabaProxyHandleStrategy.java
package com.sk.proxytest.proxy.strategy;import com.sk.proxytest.proxy.bean.ProxyParam;
import com.sk.proxytest.proxy.bean.ProxyResult;
import org.springframework.http.HttpHeaders;public class AlibabaProxyHandleStrategy implements ProxyHandleService {Overridepublic ProxyResult proxyHandle(ProxyParam proxyParam) {HttpHeaders headers new HttpHeaders();//TODO 根据三方服务登录接口获取鉴权信息String token token--------;headers.add(token, token);headers.add(Content-Type,application/json);//三方服务ip和portString ip 127.0.0.1;String port 8080;String proxyUrl http:// ip : port;return new ProxyResult(headers, proxyUrl);}
}ProxyHandleStrategyFactory.java
package com.sk.proxytest.proxy.strategy;import java.util.HashMap;
import java.util.Map;public class ProxyHandleStrategyFactory {private static MapString, ProxyHandleService proxyHandleServiceMap;static {proxyHandleServiceMap new HashMap();proxyHandleServiceMap.put(alibaba, new AlibabaProxyHandleStrategy());}public static ProxyHandleService getProxyHandleStrategy(String proxyType){return proxyHandleServiceMap.get(proxyType);}}ProxyStrategyContext.java
package com.sk.proxytest.proxy.strategy;import com.sk.proxytest.proxy.bean.ProxyParam;
import com.sk.proxytest.proxy.bean.ProxyResult;public class ProxyStrategyContext {private ProxyHandleService proxyHandleService;public void setProxyHandleStrategy(ProxyHandleService proxyHandleService){this.proxyHandleService proxyHandleService;}public ProxyResult handleProxy(ProxyParam proxyParam){if(proxyHandleService ! null){return proxyHandleService.proxyHandle(proxyParam);}return null;}}五、问题总结
在单机服务中gateway过于重并且与springMVC有冲突nginx代理服务不能同一鉴权或者同一鉴权太过于麻烦过滤器Filter适配器模式正好满足我们业务场景需求 功能实现的方式选择还是要考虑业务场景。
