SpringCloud开启session共享并存储到Redis的实现
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备注：以下所有的gateway均指SpringCloud Gateway
一、原架构
前端<->gateway<->console后端
原来session是在console-access中维护的，当中间有了一层gateway之后，gateway会认为session变了，从而将session的cookie信息重置，导致无法在前端的后续请求无法将cookie带上来
如下图所示的spring-web的代码中这个state会变成State.NEW而非State.STARTED
在这种情况下，部署的时候只有跳过gateway才能正常进行
即按照如下方式才能进行session的判断
前端<->console后端
二、调整架构以及相应的代码
整个业务处理和原来的没有任何改变
将session的判断控制挪到gateway当中
首先将console后端中登录以及后续业务当中涉及到session处理的部分都删除
然后开始改造gateway
1、Redis和session的配置
gateway的pom.xml增加
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.session</groupId>
<artifactId>spring-session-data-redis</artifactId>
</dependency>
因为需要依赖Redis了，所以启动类当中删除RedisAutoConfiguration.class
Nacos或者配置文件增加redis配置
spring.redis.host=127.0.0.1
spring.redis.port=6379
spring.redis.username=redis7
spring.redis.password=XXX
spring.redis.database=10
spring.redis.pool.max-active=100
spring.redis.pool.max-wait=500
spring.redis.pool.max-idle=10
spring.redis.pool.min-idle=10
spring.redis.timeout=1000
2、增加配置类
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpCookie;
import org.springframework.session.SaveMode;
import org.springframework.session.data.redis.config.annotation.web.server.EnableRedisWebSession;
import org.springframework.util.MultiValueMap;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.session.CookieWebSessionIdResolver;
import org.springframework.web.server.session.WebSessionIdResolver;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
@EnableRedisWebSession(saveMode = SaveMode.ALWAYS, maxInactiveIntervalInSeconds = 1200)
@Configuration
@Slf4j
public class RedisSessionConfig {
@Bean
public WebSessionIdResolver webSessionIdResolver() {
CustomWebSessionIdResolver customWebSessionIdResolver = new CustomWebSessionIdResolver();
//以下四项配置主要用于跨域调用让客户端处理cookie信息；若同域调用，下面四行可删除
customWebSessionIdResolver.addCookieInitializer((builder) -> builder.httpOnly(true));
customWebSessionIdResolver.addCookieInitializer((builder) -> builder.path("/"));
customWebSessionIdResolver.addCookieInitializer((builder) -> builder.sameSite("None"));
customWebSessionIdResolver.addCookieInitializer((builder) -> builder.secure(true));
return customWebSessionIdResolver;
}
private static class CustomWebSessionIdResolver extends CookieWebSessionIdResolver {
// 重写resolve方法 对SESSION进行base64解码
@Override
public List<String> resolveSessionIds(ServerWebExchange exchange) {
MultiValueMap<String, HttpCookie> cookieMap = exchange.getRequest().getCookies();
// 获取SESSION
List<HttpCookie> cookies = cookieMap.get(getCookieName());
if (cookies == null) {
return Collections.emptyList();
}
return cookies.stream().map(HttpCookie::getValue).map(this::base64Decode).collect(Collectors.toList());
}
private String base64Decode(String base64Value) {
try {
byte[] decodedCookieBytes = Base64.getDecoder().decode(base64Value);
String decodedCookieString = new String(decodedCookieBytes);
log.debug("base64Value:{}, decodedCookieString:{} ", base64Value, decodedCookieString);
return decodedCookieString;
} catch (Exception ex) {
//如果转不了base64，就认为原始值就是返回的
log.debug("Unable to Base64 decode value:{} ", base64Value);
return base64Value;
}
}
}
}
3、应答过滤器增加session设置
在ResponseLogFilter类中增加
if (request.getPath().toString().startsWith("/console/access/user/login")) {
JSONObject jsonObject = JSONObject.parseObject(finalResponseBody);
if ("0000".equals(jsonObject.getString("result"))) {
JSONObject jsonObjectData = (JSONObject) jsonObject.get("data");
String securityRandom = (String) jsonObjectData.get("securityrandom");
exchange.getSession().subscribe(webSession -> {
webSession.getAttributes().put("securityrandom", securityRandom);
});
try {
//给200毫秒让进行session设置
Thread.sleep(200);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
}
4、增加控制台处理的过滤器ConsoleFilter
首选在配置文件或者Nacos增加配置项
#Y标识需要检查session；N表示不检查session。开发的时候可以配置为N
websession.ifcheck=Y过滤器ConsoleFilter
import com.alibaba.cloud.commons.lang.StringUtils;
import com.jieyi.util.OrderedConstant;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import java.util.List;
@Component
@Slf4j
public class ConsoleFilter implements GlobalFilter, Ordered {
private static final List<String> WHITE_LIST = Arrays.asList("/console/access/user/getOtp/V1", "/console/access/user/login/V1");
@Value("${websession.ifcheck}")
private String websessionIfcheck;
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
ServerHttpRequest request = exchange.getRequest();
String path = request.getPath().toString();
//不校验session就直接通过了
if (!"Y".equals(websessionIfcheck)) {
return chain.filter(exchange);
}
//在url白名单中放行
boolean isWhiteUrl = WHITE_LIST.stream().anyMatch(path::endsWith);
if (isWhiteUrl) {
return chain.filter(exchange);
}
if (path.startsWith("/console")) {
return exchange.getSession().flatMap(webSession -> {
String securityrandomInSession = webSession.getAttribute("securityrandom");
log.info("securityrandomInSession:{}", securityrandomInSession);
if (StringUtils.isEmpty(securityrandomInSession)) {
byte[] bytes = "{\"status\":\"401\",\"msg\":\"Not login or login timeout\"}".getBytes(StandardCharsets.UTF_8);
DataBuffer buffer = exchange.getResponse().bufferFactory().wrap(bytes);
exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
return exchange.getResponse().writeWith(Flux.just(buffer));
}
return chain.filter(exchange);
});
} else {
return chain.filter(exchange);
}
}
@Override
public int getOrder() {
return OrderedConstant.LOGGING_FILTER;
}
}
5、前端请求中增加（跨域时）
withCredentials = true只有增加这个请求才能携带和处理cookie
三、部署模式
1、同域
对于同域的部署http和https均可（当然更建议https）
提供一个nginx同域部署的参考：
server {
#console-samedomain-test
listen 38093 ssl;
proxy_set_header Host $host:38093;
root html;
index index.html index.htm;
ssl_certificate cert/server.crt;
ssl_certificate_key cert/server.key;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
location / {
proxy_pass http://127.0.0.1:30000/;
}
location /ccuconsole {
proxy_pass http://127.0.0.1:5120/ccuconsole;
}
}
该配置为https，走的38093端口
前端页面访问https://ip:38093/ccuconsole
所有的请求都通过该同域的ip和端口转发到http://127.0.0.1:30000对应的服务（确保该服务中不存在/ccuconsole开头的路径）中
2、跨域
对于跨域的部必须使用https（现在的浏览器版本的要求，浏览器已不再支持http的跨域了）
提供一个nginx跨域部署的参考：
server {
#console-web-crossdomain-test
listen 38091 ssl;
proxy_set_header Host $host:38091;
root html;
index index.html index.htm;
ssl_certificate cert/server.crt;
ssl_certificate_key cert/server.key;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
location /ccuconsole {
proxy_pass http://127.0.0.1:5120/ccuconsole;
}
}
server {
#console-crossdomain-test
listen 38092 ssl;
proxy_set_header Host $host:38092;
root html;
index index.html index.htm;
ssl_certificate cert/server.crt;
ssl_certificate_key cert/server.key;
ssl_session_timeout 5m;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
location / {
proxy_pass http://127.0.0.1:30000/;
}
}
前端页面访问https://ip:38091/ccuconsole
所有的请求都通过该同域的ip和38092转发到http://127.0.0.1:30000对应的服务（确保该服务中有无/ccuconsole开头的路径并不影响，但是为了可切换同域部署，不推荐存在/ccuconsole开头的路径）中
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
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