simplest one

.gitignore

@@ -38,3 +38,6 @@ out/
 
 .gradle/
 .gradle/**
+
+samples/
+samples/**

Dockerfile

@@ -1,4 +1,4 @@
-FROM gradle:7.6.0-jdk17 AS dependencies
+FROM gradle:8.12.1-jdk17 AS dependencies
 
 # Disable the Gradle daemon for Continuous Integration servers as correctness
 # is usually a priority over speed in CI environments. Using a fresh

docker-compose.yaml

@@ -1,24 +1,10 @@
 version: '3.8'
 
-networks:
-  your-hike:
-      external: true
-
 services:
 
-  yh-backend-gateway:
+  jateway:
     build: ./
-    container_name: yh-gateway
+    container_name: jateway
-    networks:
+    restart: unless-stopped
-      - your-hike
+    ports:
-    restart: always
+      - 8080:8080
-    environment:
-      EUREKA_CLIENT_SERVICE_URL_DEFAULTZONE: ${EUREKA_CLIENT_SERVICE_URL_DEFAULTZONE?Adjust default zone to Eureka}
-      SPRING_CLOUD_CONFIG_URL: ${SPRING_CLOUD_CONFIG_URL?Specify config server URL}
-      SPRING_CONFIG_IMPORT: optional:configserver:${SPRING_CLOUD_CONFIG_URL?Specify config server URL}
-      AUTH_URL: ${AUTH_URL?Specify Auth URL}
-      SPRING_BOOT_ADMIN_CLIENT_URL: http://yh-admin-panel:8080/
-      OTEL_EXPORTER_OTLP_ENDPOINT: ${OTEL_EXPORTER_OTLP_ENDPOINT?Specify OpenTelemetry exporter endpoint like http://localhost:4317}
-      OTEL_SERVICE_NAME: yh-gateway
-    volumes:
-      - /var/log/yh:/var/log/yh

service/build.gradle

@@ -22,8 +22,6 @@ dependencyManagement {
 
 dependencies {
     implementation "org.springframework.cloud:spring-cloud-starter-gateway:${gatewayStarterVersion}"
-    // https://mvnrepository.com/artifact/com.google.guava/guava
-    implementation group: 'com.google.guava', name: 'guava', version: '33.4.0-jre'
 
     // actuator
     implementation "org.springframework.boot:spring-boot-starter-actuator:${springBootVersion}"

service/src/main/java/me/bvn13/jateway/logging/GatewayRoutingLoggingFilter.java

@@ -1,39 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.*;
-
-import java.net.URI;
-import java.util.Collections;
-import java.util.Set;
-
-import org.springframework.cloud.gateway.filter.GatewayFilterChain;
-import org.springframework.cloud.gateway.filter.GlobalFilter;
-import org.springframework.cloud.gateway.route.Route;
-import org.springframework.core.Ordered;
-import org.springframework.core.annotation.Order;
-import org.springframework.stereotype.Component;
-import org.springframework.web.server.ServerWebExchange;
-
-import lombok.extern.slf4j.Slf4j;
-import reactor.core.publisher.Mono;
-
-@Slf4j
-@Order(Ordered.HIGHEST_PRECEDENCE)
-@Component
-public class GatewayRoutingLoggingFilter implements GlobalFilter {
-
-    @Override
-    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
-
-        final Set<URI> uris = exchange.getAttributeOrDefault(GATEWAY_ORIGINAL_REQUEST_URL_ATTR, Collections.emptySet());
-        final String originalUri = (uris.isEmpty())
-                ? exchange.getRequest().getURI().toString()
-                : uris.iterator().next().toString();
-        final Route route = exchange.getAttribute(GATEWAY_ROUTE_ATTR);
-        final URI routeUrl = exchange.getAttribute(GATEWAY_REQUEST_URL_ATTR);
-        log.info("Incoming request " + originalUri + " is routed with <" + route.getId() + "> to URL: " + routeUrl);
-        return chain.filter(exchange);
-
-    }
-
-}

service/src/main/java/me/bvn13/jateway/logging/IgnoringActuatorLoggingFilter.java

@@ -1,39 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.regex.Pattern;
-
-
-import ch.qos.logback.classic.spi.ILoggingEvent;
-import ch.qos.logback.core.filter.Filter;
-import ch.qos.logback.core.spi.FilterReply;
-
-public class IgnoringActuatorLoggingFilter extends Filter<ILoggingEvent> {
-    private static final Pattern ACTUATOR =
-            Pattern.compile("GET \"/(health|prometheus)\", parameters=\\{}");
-    private static final Pattern COMPLETED =
-            Pattern.compile("Completed 200 OK");
-
-    private final Set<String> activeThreads = new HashSet<>();
-
-    @Override
-    public FilterReply decide(ILoggingEvent loggingEvent) {
-        if (isHealthOrPrometheus(loggingEvent.getMessage())) {
-            activeThreads.add(loggingEvent.getThreadName());
-            return FilterReply.DENY;
-        } else if (isCompleted200Ok(loggingEvent.getMessage()) && activeThreads.remove(loggingEvent.getThreadName())) {
-            return FilterReply.DENY;
-        } else {
-            return FilterReply.ACCEPT;
-        }
-    }
-
-    private boolean isHealthOrPrometheus(String message) {
-        return ACTUATOR.matcher(message).matches();
-    }
-
-    private boolean isCompleted200Ok(String message) {
-        return COMPLETED.matcher(message).matches();
-    }
-}

service/src/main/java/me/bvn13/jateway/logging/LoggingConfig.java

@@ -1,18 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-
-import lombok.extern.slf4j.Slf4j;
-
-
-@Slf4j
-@Configuration
-public class LoggingConfig {
-
-    @Bean
-    public ReactiveLoggingFilter reactiveLoggingFilter() {
-        return new ReactiveLoggingFilter();
-    }
-
-}

service/src/main/java/me/bvn13/jateway/logging/LoggingFilter.java

@@ -0,0 +1,46 @@
+package me.bvn13.jateway.logging;
+
+import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.*;
+
+import java.net.URI;
+
+import org.springframework.cloud.gateway.filter.GatewayFilterChain;
+import org.springframework.cloud.gateway.filter.GlobalFilter;
+import org.springframework.cloud.gateway.route.Route;
+import org.springframework.core.Ordered;
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.http.server.reactive.ServerHttpResponse;
+import org.springframework.stereotype.Component;
+import org.springframework.web.server.ServerWebExchange;
+
+import lombok.extern.slf4j.Slf4j;
+import reactor.core.publisher.Mono;
+
+@Slf4j
+@Component
+public class LoggingFilter implements GlobalFilter, Ordered {
+    
+    @Override
+    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
+        ServerHttpRequest request = exchange.getRequest();
+        ServerHttpResponse response = exchange.getResponse();
+        URI originalUri = request.getURI();
+        String requestHeaders = request.getHeaders().toString();
+        Route route = exchange.getAttribute(GATEWAY_ROUTE_ATTR);
+        URI uri = exchange.getAttribute(GATEWAY_REQUEST_URL_ATTR);
+        String statusCode = String.valueOf(response.getStatusCode().value());
+        String responseHeaders = response.getHeaders().toString();
+        String msg = "" + route.getId() + " | " + statusCode + " | " + originalUri + " -> " + uri + " | request headers: " + requestHeaders + ", response headers: " + responseHeaders;
+        if (response.getStatusCode().isError()) {
+            log.error(msg);
+        } else {
+            log.info(msg);
+        }
+        return chain.filter(exchange);
+    }
+    
+    @Override
+    public int getOrder() {
+        return Ordered.LOWEST_PRECEDENCE;
+    }
+}

service/src/main/java/me/bvn13/jateway/logging/ReactiveLoggingFilter.java

@@ -1,88 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import static me.bvn13.jateway.utils.DateFormats.*;
-
-import java.time.Instant;
-
-import org.springframework.cloud.gateway.filter.GatewayFilterChain;
-import org.springframework.cloud.gateway.filter.GlobalFilter;
-import org.springframework.core.Ordered;
-import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.http.server.reactive.ServerHttpResponse;
-import org.springframework.lang.Nullable;
-import org.springframework.web.server.ServerWebExchange;
-import org.springframework.web.server.ServerWebExchangeDecorator;
-
-import lombok.extern.slf4j.Slf4j;
-import me.bvn13.jateway.utils.LogEscapeUtils;
-import me.bvn13.jateway.utils.LogFormatUtils;
-import reactor.core.publisher.Mono;
-
-@Slf4j
-public class ReactiveLoggingFilter implements GlobalFilter, Ordered {
-
-    @Override
-    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
-        final Instant requestTime = Instant.now();
-
-        final StringBuilder reqBb = new StringBuilder();
-        final StringBuilder respBb = new StringBuilder();
-
-        ServerWebExchangeDecorator exchangeDecorator = new ServerWebExchangeDecorator(exchange) {
-            @Override
-            public ServerHttpRequest getRequest() {
-                return new RequestLoggingWrapper(super.getRequest(), reqBb);
-            }
-
-            @Override
-            public ServerHttpResponse getResponse() {
-                return new ResponseLoggingWrapper(super.getResponse(), respBb);
-            }
-        };
-        return chain.filter(exchangeDecorator).doOnSuccess(aVoid -> {
-            log(requestTime, exchange.getRequest(), reqBb.toString(), exchange.getResponse(), respBb.toString(), null);
-        }).doOnError(throwable -> {
-            log(requestTime, exchange.getRequest(), reqBb.toString(), exchange.getResponse(), respBb.toString(), throwable);
-        });
-    }
-
-
-    @Override
-    public int getOrder() {
-//        return NettyWriteResponseFilter.WRITE_RESPONSE_FILTER_ORDER - 1;
-        return Ordered.HIGHEST_PRECEDENCE;
-    }
-
-    private void log(Instant requestTime, ServerHttpRequest request, String requestBody, ServerHttpResponse response, String responseBody, @Nullable Throwable throwable) {
-        String message = formatMessage(requestTime, request, requestBody, response, responseBody);
-
-        if (throwable == null) {
-            log.info(message);
-        } else {
-            log.info(message, throwable);
-        }
-    }
-
-    private String formatMessage(Instant requestTime, ServerHttpRequest request, String requestBody, ServerHttpResponse response, String responseBody) {
-        StringBuilder req = new StringBuilder("Normalized ");
-        req.append(" " + request.getMethod() + " uri=" + request.getURI() + "\n")
-                .append("request_headers=[\n" + LogFormatUtils.formatHeaders(request.getHeaders()) + "]\n")
-                .append("request_time=" + formatLocalDateTime(requestTime) + "\n");
-        if (!requestBody.isEmpty()) {
-            req.append("request_body=[\n" + requestBody + "\n]");
-        }
-        String filteredReqMsg = req.toString();
-
-        StringBuilder resp = new StringBuilder();
-        resp.append("\nResponse " + response.getStatusCode() + "\n" +
-                "response_headers=[\n" + LogFormatUtils.formatHeaders(response.getHeaders()) + "]\n");
-        if (!responseBody.isEmpty()) {
-            resp.append("response_body=[\n" + responseBody + "\n]");
-        }
-
-        String filteredRespMsg = resp.toString();
-
-        return LogEscapeUtils.escapeWithLf(filteredReqMsg + filteredRespMsg);
-    }
-
-}

service/src/main/java/me/bvn13/jateway/logging/RequestLoggingWrapper.java

@@ -1,34 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import lombok.extern.slf4j.Slf4j;
-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 java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.nio.channels.Channels;
-import java.nio.charset.StandardCharsets;
-
-@Slf4j
-class RequestLoggingWrapper extends ServerHttpRequestDecorator {
-    private final StringBuilder bb;
-
-    public RequestLoggingWrapper(ServerHttpRequest delegate, StringBuilder bb) {
-        super(delegate);
-        this.bb = bb;
-    }
-
-    @Override
-    public Flux<DataBuffer> getBody() {
-        return super.getBody().doOnNext(data ->{
-            try(ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
-                Channels.newChannel(baos).write(data.asByteBuffer().asReadOnlyBuffer());
-                bb.append(new String(baos.toByteArray(), StandardCharsets.UTF_8));
-            } catch (IOException ex) {
-                log.error("Error when attempt to collect request body", ex);
-            }
-        });
-    }
-}

service/src/main/java/me/bvn13/jateway/logging/ResponseLoggingWrapper.java

@@ -1,40 +0,0 @@
-package me.bvn13.jateway.logging;
-
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.nio.channels.Channels;
-import java.nio.charset.StandardCharsets;
-
-import org.reactivestreams.Publisher;
-import org.slf4j.Logger;
-import org.springframework.core.io.buffer.DataBuffer;
-import org.springframework.http.server.reactive.ServerHttpResponse;
-import org.springframework.http.server.reactive.ServerHttpResponseDecorator;
-
-import lombok.extern.slf4j.Slf4j;
-import reactor.core.publisher.Flux;
-import reactor.core.publisher.Mono;
-
-@Slf4j
-class ResponseLoggingWrapper extends ServerHttpResponseDecorator {
-    private final StringBuilder bb;
-
-    public ResponseLoggingWrapper(ServerHttpResponse delegate, StringBuilder bb) {
-        super(delegate);
-        this.bb = bb;
-    }
-
-    @Override
-    public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
-        final Logger l = log;
-        Flux<DataBuffer> buffer = Flux.from(body);
-        return super.writeWith(buffer.doOnNext( data -> {
-            try(ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
-                Channels.newChannel(baos).write(data.asByteBuffer().asReadOnlyBuffer());
-                bb.append(new String(baos.toByteArray(), StandardCharsets.UTF_8));
-            } catch (IOException ex) {
-                l.error("Error when attempt to collect response body", ex);
-            }
-        }));
-    }
-}

service/src/main/java/me/bvn13/jateway/utils/DateFormats.java

@@ -1,26 +0,0 @@
-package me.bvn13.jateway.utils;
-
-import java.time.Instant;
-import java.time.OffsetDateTime;
-import java.time.ZoneId;
-import java.time.format.DateTimeFormatter;
-
-import jakarta.annotation.Nonnull;
-
-public class DateFormats {
-    private static final String OFFSET_DATE_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss+Z";
-    private static final DateTimeFormatter LOCAL_DATE_TIME = DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSS")
-            .withZone(ZoneId.systemDefault());
-    private static final DateTimeFormatter OFFSET_DATE_TIME = DateTimeFormatter.ofPattern(OFFSET_DATE_TIME_FORMAT);
-
-    @Nonnull
-    public static String formatLocalDateTime(@Nonnull Instant timestamp) {
-        return LOCAL_DATE_TIME.format(timestamp);
-    }
-
-    public static String format(OffsetDateTime offsetDateTime) {
-        return OFFSET_DATE_TIME.format(offsetDateTime);
-    }
-    private DateFormats() {
-    }
-}

service/src/main/java/me/bvn13/jateway/utils/LogEscapeUtils.java

@@ -1,24 +0,0 @@
-package me.bvn13.jateway.utils;
-
-import com.google.common.escape.Escaper;
-import com.google.common.net.PercentEscaper;
-
-import jakarta.annotation.Nullable;
-
-public class LogEscapeUtils {
-    private static final Escaper ESCAPER_WITH_LF = new PercentEscaper("\n $#%!?={}[]()<>\"':;,._/\\*-+@&№^" +
-            "абвгдеёжзийклмнопрстуфхцчшщъыьэюя" +
-            "АБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ", false);
-
-    public static String escapeWithLf(@Nullable String str) {
-        if (str == null) {
-            return "null";
-        }
-        str = str.replace("\r", "");
-        str = str.replace("\t", "    ");
-        return ESCAPER_WITH_LF.escape(str);
-    }
-
-    private LogEscapeUtils() {
-    }
-}

service/src/main/java/me/bvn13/jateway/utils/LogFormatUtils.java

@@ -1,17 +0,0 @@
-package me.bvn13.jateway.utils;
-
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.util.List;
-import java.util.Map;
-
-public class LogFormatUtils {
-    public static String formatHeaders(Map<String, List<String>> responseHeaders) {
-        StringWriter sw = new StringWriter();
-        PrintWriter pw = new PrintWriter(sw);
-        responseHeaders.forEach((name, values) -> {
-            values.forEach(value -> pw.println(name + ": " + value));
-        });
-        return sw.toString();
-    }
-}

service/src/main/resources/application.yaml

@@ -1,12 +1,21 @@
+server:
+  port: 8080
 spring:
   application:
     name: jateway
   profiles:
     active: dev
+  cloud:
+    gateway:
+      routes:
+      - id: simple_route
+        uri: http://example.com
+        predicates:
+        - Method=GET
 
 management:
   server:
-    port: 8203
+    port: 8081
   endpoints:
     enabled-by-default: false
     web:
@@ -36,9 +45,9 @@ management:
 logging:
   level:
     root: info
-    org.springframework.web.filter.CommonsRequestLoggingFilter: debug
+    # org.springframework.web.filter.CommonsRequestLoggingFilter: debug
-    org.springframework.web.server.adapter.HttpWebHandlerAdapter: debug
+    # org.springframework.web.server.adapter.HttpWebHandlerAdapter: debug
-    org.springframework.web.reactive.handler.SimpleUrlHandlerMapping: debug
+    # org.springframework.web.reactive.handler.SimpleUrlHandlerMapping: debug
-    org.springframework.web.reactive.resource.ResourceWebHandler: debug
+    # org.springframework.web.reactive.resource.ResourceWebHandler: debug
-    org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler: debug
+    # org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler: debug
-#    org.springframework.web: debug
+    # org.springframework.web: debug

service/src/main/resources/logback.xml

@@ -1,12 +1,11 @@
 <configuration>
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
-        <filter class="me.bvn13.jateway.logging.IgnoringActuatorLoggingFilter" />
         <encoder>
-            <pattern>%date %level [%thread] %logger{10} [%file:%line] %msg%n</pattern>
+            <pattern>%date | %level | %msg%n</pattern>
         </encoder>
     </appender>
 
-    <root level="debug">
+    <root level="info">
         <appender-ref ref="STDOUT" />
     </root>
 </configuration>