gateway版本是 2.0.1
1.pom结构
(部分内部项目依赖已经隐藏)
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<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<!--监控相关-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<!-- redis -->
<!--<dependency>-->
<!--<groupId>org.springframework.boot</groupId>-->
<!--<artifactId>spring-boot-starter-data-redis</artifactId>-->
<!--</dependency>-->
<!-- test-scope -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>1.1.11</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.11</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.6</version>
</dependency>
<!--第三方的jdbctemplatetool-->
<dependency>
<groupId>org.crazycake</groupId>
<artifactId>jdbctemplatetool</artifactId>
<version>1.0.4-RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<!-- alibaba start -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
</dependency>
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2.表结构
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CREATE TABLE `zc_log_notes` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '日志信息记录表主键id',
`notes` varchar(255) DEFAULT NULL COMMENT '操作记录信息',
`amenu` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '一级菜单',
`bmenu` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '二级菜单',
`ip` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '操作人ip地址，先用varchar存',
`params` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci COMMENT '请求值',
`response` text CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci COMMENT '返回值',
`create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '操作时间',
`create_user` int(11) DEFAULT NULL COMMENT '操作人id',
`end_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '响应时间',
`status` int(1) NOT NULL DEFAULT '1' COMMENT '响应结果1成功0失败',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=103 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='日志信息记录表';
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3.实体结构
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@Table(catalog = "zhiche", name = "zc_log_notes")
public class LogNotes {
/**
* 日志信息记录表主键id
*/
private Integer id;
/**
* 操作记录信息
*/
private String notes;
/**
* 一级菜单
*/
private String amenu;
/**
* 二级菜单
*/
private String bmenu;
/**
* 操作人ip地址，先用varchar存
*/
private String ip;
/**
* 请求参数记录
*/
private String params;
/**
* 返回结果记录
*/
private String response;
/**
* 操作时间
*/
private Date createTime;
/**
* 操作人id
*/
private Integer createUser;
/**
* 响应时间
*/
private Date endTime;
/**
* 响应结果1成功0失败
*/
private Integer status;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getNotes() {
return notes;
}
public void setNotes(String notes) {
this.notes = notes;
}
public String getAmenu() {
return amenu;
}
public void setAmenu(String amenu) {
this.amenu = amenu;
}
public String getBmenu() {
return bmenu;
}
public void setBmenu(String bmenu) {
this.bmenu = bmenu;
}
public String getIp() {
return ip;
}
public void setIp(String ip) {
this.ip = ip;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
public Integer getCreateUser() {
return createUser;
}
public void setCreateUser(Integer createUser) {
this.createUser = createUser;
}
public Date getEndTime() {
return endTime;
}
public void setEndTime(Date endTime) {
this.endTime = endTime;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getParams() {
return params;
}
public void setParams(String params) {
this.params = params;
}
public String getResponse() {
return response;
}
public void setResponse(String response) {
this.response = response;
}
public void setAppendResponse(String response){
if (StringUtils.isNoneBlank(this.response)) {
this.response = this.response + response;
} else {
this.response = response;
}
}
}
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4.dao层和Service层省略..
5.filter代码
1. RequestRecorderGlobalFilter 实现了GlobalFilter和Order
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package com.zc.gateway.filter;
import com.zc.entity.LogNotes;
import com.zc.gateway.service.FilterService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
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.core.io.buffer.DataBufferUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.lang.Nullable;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.net.URI;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
/**
* @author qiwenshuai
* @note 目前只记录了request方式为POST请求的方式
* @since 19-5-16 17:29 by jdk 1.8
*/
@Component
public class RequestRecorderGlobalFilter implements GlobalFilter, Ordered {
@Autowired
FilterService filterService;
private Logger logger = LoggerFactory.getLogger(RequestRecorderGlobalFilter.class);
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
ServerHttpRequest originalRequest = exchange.getRequest();
URI originalRequestUrl = originalRequest.getURI();
//只记录http的请求
String scheme = originalRequestUrl.getScheme();
if ((!"http".equals(scheme) && !"https".equals(scheme))) {
return chain.filter(exchange);
}
//这是我要打印的log-StringBuilder
StringBuilder logbuilder = new StringBuilder();
//我自己的log实体
LogNotes logNotes = new LogNotes();
// 返回解码
RecorderServerHttpResponseDecorator response = new RecorderServerHttpResponseDecorator(exchange.getResponse(), logNotes, filterService);
//请求解码
RecorderServerHttpRequestDecorator recorderServerHttpRequestDecorator = new RecorderServerHttpRequestDecorator(exchange.getRequest());
//增加过滤拦截吧
ServerWebExchange ex = exchange.mutate()
.request(recorderServerHttpRequestDecorator)
.response(response)
.build();
// 观察者模式 打印一下请求log
// 这里可以在 配置文件中我进行配置
// if (logger.isDebugEnabled()) {
response.beforeCommit(() -> Mono.defer(() -> printLog(logbuilder, response)));
// }
return recorderOriginalRequest(logbuilder, ex, logNotes)
.then(chain.filter(ex))
.then();
}
private Mono<Void> recorderOriginalRequest(StringBuilder logBuffer, ServerWebExchange exchange, LogNotes logNotes) {
logBuffer.append(System.currentTimeMillis())
.append("------------");
ServerHttpRequest request = exchange.getRequest();
Mono<Void> result = recorderRequest(request, logBuffer.append("\n原始请求：\n"), logNotes);
try {
filterService.addLog(logNotes);
} catch (Exception e) {
logger.error("保存请求参数出现错误, e->{}", e.getMessage());
}
return result;
}
/**
* 记录原始请求逻辑
*/
private Mono<Void> recorderRequest(ServerHttpRequest request, StringBuilder logBuffer, LogNotes logNotes) {
URI uri = request.getURI();
HttpMethod method = request.getMethod();
HttpHeaders headers = request.getHeaders();
logNotes.setIp(headers.getHost().getHostString());
logNotes.setAmenu("一级菜单");
logNotes.setBmenu("二级菜单");
logNotes.setNotes("操作记录");
logBuffer
.append(method.toString()).append(' ')
.append(uri.toString()).append('\n');
logBuffer.append("------------请求头------------\n");
headers.forEach((name, values) -> {
values.forEach(value -> {
logBuffer.append(name).append(":").append(value).append('\n');
});
});
Charset bodyCharset = null;
if (hasBody(method)) {
long length = headers.getContentLength();
if (length <= 0) {
logBuffer.append("------------无body------------\n");
} else {
logBuffer.append("------------body 长度:").append(length).append(" contentType:");
MediaType contentType = headers.getContentType();
if (contentType == null) {
logBuffer.append("null，不记录body------------\n");
} else if (!shouldRecordBody(contentType)) {
logBuffer.append(contentType.toString()).append("，不记录body------------\n");
} else {
bodyCharset = getMediaTypeCharset(contentType);
logBuffer.append(contentType.toString()).append("------------\n");
}
}
}
if (bodyCharset != null) {
return doRecordReqBody(logBuffer, request.getBody(), bodyCharset, logNotes)
.then(Mono.defer(() -> {
logBuffer.append("\n------------ end ------------\n\n");
return Mono.empty();
}));
} else {
logBuffer.append("------------ end ------------\n\n");
return Mono.empty();
}
}
//日志输出返回值
private Mono<Void> printLog(StringBuilder logBuilder, ServerHttpResponse response) {
HttpStatus statusCode = response.getStatusCode();
assert statusCode != null;
logBuilder.append("响应：").append(statusCode.value()).append(" ").append(statusCode.getReasonPhrase()).append('\n');
HttpHeaders headers = response.getHeaders();
logBuilder.append("------------响应头------------\n");
headers.forEach((name, values) -> {
values.forEach(value -> {
logBuilder.append(name).append(":").append(value).append('\n');
});
});
logBuilder.append("\n------------ end at ")
.append(System.currentTimeMillis())
.append("------------\n\n");
logger.info(logBuilder.toString());
return Mono.empty();
}
//
@Override
public int getOrder() {
//在GatewayFilter之前执行
return -1;
}
private boolean hasBody(HttpMethod method) {
//只记录这3种谓词的body
// if (method == HttpMethod.POST || method == HttpMethod.PUT || method == HttpMethod.PATCH)
return true;
// return false;
}
//记录简单的常见的文本类型的request的body和response的body
private boolean shouldRecordBody(MediaType contentType) {
String type = contentType.getType();
String subType = contentType.getSubtype();
if ("application".equals(type)) {
return "json".equals(subType) || "x-www-form-urlencoded".equals(subType) || "xml".equals(subType) || "atom+xml".equals(subType) || "rss+xml".equals(subType);
} else if ("text".equals(type)) {
return true;
}
//暂时不记录form
return false;
}
// 获取请求的参数
private Mono<Void> doRecordReqBody(StringBuilder logBuffer, Flux<DataBuffer> body, Charset charset, LogNotes logNotes) {
return DataBufferUtils.join(body).doOnNext(buffer -> {
CharBuffer charBuffer = charset.decode(buffer.asByteBuffer());
//记录我实体的请求体
logNotes.setParams(charBuffer.toString());
logBuffer.append(charBuffer.toString());
DataBufferUtils.release(buffer);
}).then();
}
private Charset getMediaTypeCharset(@Nullable MediaType mediaType) {
if (mediaType != null && mediaType.getCharset() != null) {
return mediaType.getCharset();
} else {
return StandardCharsets.UTF_8;
}
}
}
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2.RecorderServerHttpRequestDecorator 继承了ServerHttpRequestDecorator
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package com.zc.gateway.filter;
import com.zc.entity.LogNotes;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpRequestDecorator;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import java.util.LinkedList;
import java.util.List;
/**
* @author qiwenshuai
* @note
* @since 19-5-16 17:30 by jdk 1.8
*/
// request
public class RecorderServerHttpRequestDecorator extends ServerHttpRequestDecorator {
private final List<DataBuffer> dataBuffers = new LinkedList<>();
private boolean bufferCached = false;
private Mono<Void> progress = null;
public RecorderServerHttpRequestDecorator(ServerHttpRequest delegate) {
super(delegate);
}
//重写request请求体
@Override
public Flux<DataBuffer> getBody() {
synchronized (dataBuffers) {
if (bufferCached)
return copy();
if (progress == null) {
progress = cache();
}
return progress.thenMany(Flux.defer(this::copy));
}
}
private Flux<DataBuffer> copy() {
return Flux.fromIterable(dataBuffers)
.map(buf -> buf.factory().wrap(buf.asByteBuffer()));
}
private Mono<Void> cache() {
return super.getBody()
.map(dataBuffers::add)
.then(Mono.defer(()-> {
bufferCached = true;
progress = null;
return Mono.empty();
}));
}
}
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3.RecorderServerHttpResponseDecorator 继承了 ServerHttpResponseDecorator
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package com.zc.gateway.filter;
import com.zc.entity.LogNotes;
import com.zc.gateway.service.FilterService;
import org.reactivestreams.Publisher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.http.server.reactive.ServerHttpResponseDecorator;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import org.springframework.core.io.buffer.DataBuffer;
import java.nio.charset.Charset;
import java.util.LinkedList;
import java.util.List;
/**
* @author qiwenshuai
* @note
* @since 19-5-16 17:32 by jdk 1.8
*/
public class RecorderServerHttpResponseDecorator extends ServerHttpResponseDecorator {
private Logger logger = LoggerFactory.getLogger(RecorderServerHttpResponseDecorator.class);
private LogNotes logNotes;
private FilterService filterService;
RecorderServerHttpResponseDecorator(ServerHttpResponse delegate, LogNotes logNotes, FilterService filterService) {
super(delegate);
this.logNotes = logNotes;
this.filterService = filterService;
}
/**
* 基于netty,我这里需要显示的释放一次dataBuffer,但是slice出来的byte是不需要释放的,
* 与下层共享一个字符串缓冲池,gateway过滤器使用的是nettyWrite类,会发生response数据多次才能返回完全。
* 在 ServerHttpResponseDecorator 之后会释放掉另外一个refCount.
*/
@Override
public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
DataBufferFactory bufferFactory = this.bufferFactory();
if (body instanceof Flux) {
Flux<? extends DataBuffer> fluxBody = (Flux<? extends DataBuffer>) body;
Publisher<? extends DataBuffer> re = fluxBody.map(dataBuffer -> {
// probably should reuse buffers
byte[] content = new byte[dataBuffer.readableByteCount()];
// 数据读入数组
dataBuffer.read(content);
// 释放掉内存
DataBufferUtils.release(dataBuffer);
// 记录返回值
String s = new String(content, Charset.forName("UTF-8"));
logNotes.setAppendResponse(s);
try {
filterService.updateLog(logNotes);
} catch (Exception e) {
logger.error("Response值修改日志记录出现错误->{}", e);
}
byte[] uppedContent = new String(content, Charset.forName("UTF-8")).getBytes();
return bufferFactory.wrap(uppedContent);
});
return super.writeWith(re);
}
return super.writeWith(body);
}
@Override
public Mono<Void> writeAndFlushWith(Publisher<? extends Publisher<? extends DataBuffer>> body) {
return writeWith(Flux.from(body).flatMapSequential(p -> p));
}
}
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注意：
网关过滤返回值 底层用到了Netty服务，在response返回的时候，有时候会写的数据是不全的，于是我在实体类中新增了一个setAppendResponse方法进行拼接， 再者，gateway的过滤器是链式结构，需要定义order排序为最先(-1)，然后和预置的gateway过滤器做一个combine.
代码中用到的 dataBuffer 结构，底层其实也是类似netty的byteBuffer，用到了字节数组池，同时也用到了 引用计数器 (refInt).
为了让jvm在gc的时候垃圾得到回收，避免内存泄露，我们需要在转换字节使用的地方，显示的释放一次
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DataBufferUtils.release(dataBuffer);
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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服务器之家。
原文链接：https://blog.csdn.net/gpdsjqws/article/details/90437732