SpringCloud使用Feign拦截器实现URL过滤和RequestParam加密

一、FeignInterceptor.class拦截器

package com.xiaohang.socialcard.pre.intercepter;

import com.xiaohang.socialcard.pre.utils.SM4Util;
import feign.RequestInterceptor;
import feign.RequestTemplate;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;

import java.util.*;

@Configuration
@Slf4j
public class FeignInterceptor implements RequestInterceptor {

    @Value("${encrypt.urls}")
    private String[] urlList;

    @Override
    public void apply(RequestTemplate template) {
        if (Arrays.asList(urlList).contains(template.url())) {//根据URL地址过滤请求
            log.info("请求参数为：{}", template.queryLine());//?param=123456
            Collection<String> paramList = template.queries().get("param");
            String param = paramList.iterator().next();
            try {
                // 加密
                param = SM4Util.encryptEcb("1234567890", param);
            } catch (Exception e) {
                e.printStackTrace();
            }
            Map<String, Collection<String>> newQueries = new HashMap<>();
            Collection<String> value = new ArrayList<>();
            value.add(param);
            newQueries.put("param", value);
            template.queries(newQueries);// 替换原有对象
            log.info("加密后参数为：{}", template.queryLine());//?param=xxxxxx
        }
    }
}

二、配置文件

application.yml

changsha-payment.url: http://xx.xx.xx.xx:8080
encrypt.urls: /openInter/getToken,/openInter/dispatchPayEx,/bcs/balance

三、APIFeign接口

package com.xiaohang.socialcard.pre.feign;

import com.xiaohang.socialcard.pre.model.ChangShaResp;
import com.xiaohang.socialcard.pre.pojo.Loffee;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.*;

@FeignClient(name = "changsha-payment", url = "${changsha-payment.url}")
public interface ChangShaApi {

    @RequestMapping(method = RequestMethod.GET, path = "openInter/getToken", consumes = "*/*", produces = "application/json;charset=UTF-8")
    ChangShaResp getToken(@RequestParam(name = "param", required = true) String param);
    @RequestMapping(method = RequestMethod.POST, value = "openInter/dispatchPayEx", produces = "text/html", consumes = "application/x-www-form-urlencoded")
    String payPage(@RequestParam(name = "param", required = true) String param);

    @RequestMapping(method = RequestMethod.POST, path = "/bcs/balance", produces = "text/html", consumes = "application/x-www-form-urlencoded")
    String downLoadPay(@RequestParam(name = "param", required = true) String param);

四、启动类Application.class

package com.xiaohang.socialcard.pre;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.feign.EnableFeignClients;

@EnableFeignClients
@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

五、pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.xiaohang</groupId>
    <artifactId>pre-socialcard-changsha</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <parent>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-parent</artifactId>
        <version>Camden.SR5</version>
    </parent>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <java.version>1.8</java.version>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <version>1.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-feign</artifactId>
            <version>1.2.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.18</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.9</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>springloaded</artifactId>
                        <version>1.2.5.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>
</project>