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Spring Cloud gateway 網(wǎng)關(guān)如何攔截Post請(qǐng)求日志

 更新時(shí)間：2021年07月16日 09:08:33   作者：wsdl-king  
這篇文章主要介紹了Spring Cloud gateway 網(wǎng)關(guān)如何攔截Post請(qǐng)求日志的操作，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教

gateway版本是 2.0.1

1.pom結(jié)構(gòu)

(部分內(nèi)部項(xiàng)目依賴已經(jīng)隱藏)

<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>
<!--監(jiān)控相關(guān)-->
<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>

2.表結(jié)構(gòu)

CREATE TABLE `zc_log_notes` (
  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '日志信息記錄表主鍵id',
  `notes` varchar(255) DEFAULT NULL COMMENT '操作記錄信息',
  `amenu` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '一級(jí)菜單',
  `bmenu` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL COMMENT '二級(jí)菜單',
  `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 '請(qǐng)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 '操作時(shí)間',
  `create_user` int(11) DEFAULT NULL COMMENT '操作人id',
  `end_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '響應(yīng)時(shí)間',
  `status` int(1) NOT NULL DEFAULT '1' COMMENT '響應(yīng)結(jié)果1成功0失敗',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=103 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='日志信息記錄表';

3.實(shí)體結(jié)構(gòu)

@Table(catalog = "zhiche", name = "zc_log_notes")
public class LogNotes {
    /**
     * 日志信息記錄表主鍵id
     */
    private Integer id;
    /**
     * 操作記錄信息
     */
    private String notes;
    /**
     * 一級(jí)菜單
     */
    private String amenu;
    /**
     * 二級(jí)菜單
     */
    private String bmenu;
    /**
     * 操作人ip地址，先用varchar存
     */
    private String ip;
    /**
     * 請(qǐng)求參數(shù)記錄
     */
    private String params;
    /**
     * 返回結(jié)果記錄
     */
    private String response;
    /**
     * 操作時(shí)間
     */
    private Date createTime;
    /**
     * 操作人id
     */
    private Integer createUser;
    /**
     * 響應(yīng)時(shí)間
     */
    private Date endTime;
    /**
     * 響應(yīng)結(jié)果1成功0失敗
     */
    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;
        }
    }
}

4.dao層和Service層省略..

5.filter代碼

1. RequestRecorderGlobalFilter 實(shí)現(xiàn)了GlobalFilter和Order

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 目前只記錄了request方式為POST請(qǐng)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();
        //只記錄http的請(qǐng)求
        String scheme = originalRequestUrl.getScheme();
        if ((!"http".equals(scheme) && !"https".equals(scheme))) {
            return chain.filter(exchange);
        }
        //這是我要打印的log-StringBuilder
        StringBuilder logbuilder = new StringBuilder();
        //我自己的log實(shí)體
        LogNotes logNotes = new LogNotes();
        // 返回解碼
        RecorderServerHttpResponseDecorator response = new RecorderServerHttpResponseDecorator(exchange.getResponse(), logNotes, filterService);
        //請(qǐng)求解碼
        RecorderServerHttpRequestDecorator recorderServerHttpRequestDecorator = new RecorderServerHttpRequestDecorator(exchange.getRequest());
        //增加過濾攔截吧
        ServerWebExchange ex = exchange.mutate()
                .request(recorderServerHttpRequestDecorator)
                .response(response)
                .build();
        //  觀察者模式 打印一下請(qǐng)求log
        // 這里可以在 配置文件中我進(jìn)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原始請(qǐng)求：\n"), logNotes);
        try {
            filterService.addLog(logNotes);
        } catch (Exception e) {
            logger.error("保存請(qǐng)求參數(shù)出現(xiàn)錯(cuò)誤, e->{}", e.getMessage());
        }
        return result;
    }
    /**
     * 記錄原始請(qǐng)求邏輯
     */
    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("一級(jí)菜單");
        logNotes.setBmenu("二級(jí)菜單");
        logNotes.setNotes("操作記錄");
        logBuffer
                .append(method.toString()).append(' ')
                .append(uri.toString()).append('\n');
        logBuffer.append("------------請(qǐng)求頭------------\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("------------無body------------\n");
            } else {
                logBuffer.append("------------body 長度:").append(length).append(" contentType:");
                MediaType contentType = headers.getContentType();
                if (contentType == null) {
                    logBuffer.append("null，不記錄body------------\n");
                } else if (!shouldRecordBody(contentType)) {
                    logBuffer.append(contentType.toString()).append("，不記錄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();
        }
    }
    //日志輸出返回值
    private Mono<Void> printLog(StringBuilder logBuilder, ServerHttpResponse response) {
        HttpStatus statusCode = response.getStatusCode();
        assert statusCode != null;
        logBuilder.append("響應(yīng)：").append(statusCode.value()).append(" ").append(statusCode.getReasonPhrase()).append('\n');
        HttpHeaders headers = response.getHeaders();
        logBuilder.append("------------響應(yīng)頭------------\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之前執(zhí)行
        return -1;
    }
    private boolean hasBody(HttpMethod method) {
        //只記錄這3種謂詞的body
//        if (method == HttpMethod.POST || method == HttpMethod.PUT || method == HttpMethod.PATCH)
        return true;
//        return false;
    }
    //記錄簡單的常見的文本類型的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;
        }
        //暫時(shí)不記錄form
        return false;
    }
    // 獲取請(qǐng)求的參數(shù)
    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());
            //記錄我實(shí)體的請(qǐng)求體
            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;
        }
    }
}

2.RecorderServerHttpRequestDecorator 繼承了ServerHttpRequestDecorator

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);
    }
//重寫request請(qǐng)求體
    @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();
                }));
    }
}

3.RecorderServerHttpResponseDecorator 繼承了 ServerHttpResponseDecorator

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,我這里需要顯示的釋放一次dataBuffer,但是slice出來的byte是不需要釋放的,
     * 與下層共享一個(gè)字符串緩沖池,gateway過濾器使用的是nettyWrite類,會(huì)發(fā)生response數(shù)據(jù)多次才能返回完全。
     * 在 ServerHttpResponseDecorator 之后會(huì)釋放掉另外一個(gè)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()];
                // 數(shù)據(jù)讀入數(shù)組
                dataBuffer.read(content);
                // 釋放掉內(nèi)存
                DataBufferUtils.release(dataBuffer);
                // 記錄返回值
                String s = new String(content, Charset.forName("UTF-8"));
                logNotes.setAppendResponse(s);
                try {
                    filterService.updateLog(logNotes);
                } catch (Exception e) {
                    logger.error("Response值修改日志記錄出現(xiàn)錯(cuò)誤->{}", 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));
    }
}

注意：

網(wǎng)關(guān)過濾返回值 底層用到了Netty服務(wù)，在response返回的時(shí)候，有時(shí)候會(huì)寫的數(shù)據(jù)是不全的，于是我在實(shí)體類中新增了一個(gè)setAppendResponse方法進(jìn)行拼接， 再者，gateway的過濾器是鏈?zhǔn)浇Y(jié)構(gòu)，需要定義order排序?yàn)樽钕?-1)，然后和預(yù)置的gateway過濾器做一個(gè)combine.

代碼中用到的 dataBuffer 結(jié)構(gòu)，底層其實(shí)也是類似netty的byteBuffer，用到了字節(jié)數(shù)組池，同時(shí)也用到了 引用計(jì)數(shù)器 (refInt).

為了讓jvm在gc的時(shí)候垃圾得到回收，避免內(nèi)存泄露，我們需要在轉(zhuǎn)換字節(jié)使用的地方，顯示的釋放一次

DataBufferUtils.release(dataBuffer);

以上為個(gè)人經(jīng)驗(yàn)，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

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