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Add Max Sessions on WebFlux Sample

Marcus Hert Da Coregio hace 1 año
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commit
c09de87362
Se han modificado 15 ficheros con 762 adiciones y 0 borrados
  1. 36 0
      reactive/webflux/java/session-management/maximum-sessions/.gitignore
  2. 6 0
      reactive/webflux/java/session-management/maximum-sessions/README.adoc
  3. 32 0
      reactive/webflux/java/session-management/maximum-sessions/build.gradle
  4. BIN
      reactive/webflux/java/session-management/maximum-sessions/gradle/wrapper/gradle-wrapper.jar
  5. 7 0
      reactive/webflux/java/session-management/maximum-sessions/gradle/wrapper/gradle-wrapper.properties
  6. 249 0
      reactive/webflux/java/session-management/maximum-sessions/gradlew
  7. 92 0
      reactive/webflux/java/session-management/maximum-sessions/gradlew.bat
  8. 0 0
      reactive/webflux/java/session-management/maximum-sessions/settings.gradle
  9. 30 0
      reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/HelloController.java
  10. 29 0
      reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/MaximumSessionsApplication.java
  11. 100 0
      reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/SecurityConfig.java
  12. 1 0
      reactive/webflux/java/session-management/maximum-sessions/src/main/resources/application.properties
  13. 89 0
      reactive/webflux/java/session-management/maximum-sessions/src/test/java/com/example/maximumsessions/MaximumSessionsApplicationPreventLoginTests.java
  14. 90 0
      reactive/webflux/java/session-management/maximum-sessions/src/test/java/com/example/maximumsessions/MaximumSessionsApplicationTests.java
  15. 1 0
      settings.gradle

+ 36 - 0
reactive/webflux/java/session-management/maximum-sessions/.gitignore

@@ -0,0 +1,36 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

+ 6 - 0
reactive/webflux/java/session-management/maximum-sessions/README.adoc

@@ -0,0 +1,6 @@
+== WebFlux Max Sessions Sample
+
+This sample demonstrates how to configure the maximum number of concurrent sessions for a WebFlux application.
+
+Check the `SecurityConfig.class` to see how the maximum number of sessions is configured.
+This sample also contains tests that demonstrate how the maximum number of sessions is enforced.

+ 32 - 0
reactive/webflux/java/session-management/maximum-sessions/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+	id 'java'
+	alias(libs.plugins.org.springframework.boot)
+	alias(libs.plugins.io.spring.dependency.management)
+}
+
+group = 'com.example'
+version = '0.0.1-SNAPSHOT'
+
+java {
+	sourceCompatibility = '17'
+}
+
+ext["spring-security.version"] = "6.3.0-SNAPSHOT"
+
+repositories {
+	mavenCentral()
+	maven { url "https://repo.spring.io/milestone" }
+	maven { url "https://repo.spring.io/snapshot" }
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-security'
+	implementation 'org.springframework.boot:spring-boot-starter-webflux'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'io.projectreactor:reactor-test'
+	testImplementation 'org.springframework.security:spring-security-test'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

BIN
reactive/webflux/java/session-management/maximum-sessions/gradle/wrapper/gradle-wrapper.jar


+ 7 - 0
reactive/webflux/java/session-management/maximum-sessions/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

+ 249 - 0
reactive/webflux/java/session-management/maximum-sessions/gradlew

@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

+ 92 - 0
reactive/webflux/java/session-management/maximum-sessions/gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

+ 0 - 0
reactive/webflux/java/session-management/maximum-sessions/settings.gradle


+ 30 - 0
reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/HelloController.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.maximumsessions;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+class HelloController {
+
+	@GetMapping("/hello")
+	String hello() {
+		return "Hello!";
+	}
+
+}

+ 29 - 0
reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/MaximumSessionsApplication.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.maximumsessions;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MaximumSessionsApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(MaximumSessionsApplication.class, args);
+	}
+
+}

+ 100 - 0
reactive/webflux/java/session-management/maximum-sessions/src/main/java/com/example/maximumsessions/SecurityConfig.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright 2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.maximumsessions;
+
+import reactor.core.publisher.Mono;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
+import org.springframework.security.config.web.server.ServerHttpSecurity;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.session.ReactiveSessionRegistry;
+import org.springframework.security.core.userdetails.MapReactiveUserDetailsService;
+import org.springframework.security.core.userdetails.ReactiveUserDetailsService;
+import org.springframework.security.core.userdetails.User;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.web.server.SecurityWebFilterChain;
+import org.springframework.security.web.server.authentication.InvalidateLeastUsedServerMaximumSessionsExceededHandler;
+import org.springframework.security.web.server.authentication.PreventLoginServerMaximumSessionsExceededHandler;
+import org.springframework.security.web.server.authentication.ServerMaximumSessionsExceededHandler;
+import org.springframework.security.web.server.authentication.SessionLimit;
+import org.springframework.security.web.session.WebSessionStoreReactiveSessionRegistry;
+import org.springframework.web.server.session.DefaultWebSessionManager;
+import org.springframework.web.server.session.WebSessionManager;
+
+@Configuration(proxyBeanMethods = false)
+@EnableWebFluxSecurity
+public class SecurityConfig {
+
+	@Value("${prevent-login:false}")
+	private boolean preventLogin;
+
+	@Bean
+	SecurityWebFilterChain filterChain(ServerHttpSecurity http) {
+		// @formatter:off
+		http
+				.authorizeExchange((exchanges) -> exchanges.anyExchange().authenticated())
+				.formLogin(Customizer.withDefaults())
+				.sessionManagement((sessions) -> sessions
+						.concurrentSessions((concurrency) -> concurrency
+							.maximumSessions(maxSessions())
+							.maximumSessionsExceededHandler(maximumSessionsExceededHandler()))
+				);
+		return http.build();
+		// @formatter:on
+	}
+
+	@Bean
+	ReactiveUserDetailsService userDetailsService() {
+		UserDetails user = User.withDefaultPasswordEncoder().username("user").password("password").roles("USER")
+				.build();
+		UserDetails admin = User.withDefaultPasswordEncoder().username("admin").password("password").roles("ADMIN")
+				.build();
+		UserDetails unlimitedSessions = User.withDefaultPasswordEncoder().username("unlimited").password("password")
+				.roles("UNLIMITED_SESSIONS").build();
+		return new MapReactiveUserDetailsService(user, admin, unlimitedSessions);
+	}
+
+	@Bean
+	ReactiveSessionRegistry reactiveSessionRegistry(WebSessionManager webSessionManager) {
+		return new WebSessionStoreReactiveSessionRegistry(
+				((DefaultWebSessionManager) webSessionManager).getSessionStore());
+	}
+
+	private SessionLimit maxSessions() {
+		return (authentication) -> {
+			if (authentication.getAuthorities().contains(new SimpleGrantedAuthority("ROLE_UNLIMITED_SESSIONS"))) {
+				return Mono.just(-1);
+			}
+			if (authentication.getAuthorities().contains(new SimpleGrantedAuthority("ROLE_ADMIN"))) {
+				return Mono.just(2);
+			}
+			return Mono.just(1);
+		};
+	}
+
+	private ServerMaximumSessionsExceededHandler maximumSessionsExceededHandler() {
+		if (this.preventLogin) {
+			return new PreventLoginServerMaximumSessionsExceededHandler();
+		}
+		return new InvalidateLeastUsedServerMaximumSessionsExceededHandler();
+	}
+
+}

+ 1 - 0
reactive/webflux/java/session-management/maximum-sessions/src/main/resources/application.properties

@@ -0,0 +1 @@
+

+ 89 - 0
reactive/webflux/java/session-management/maximum-sessions/src/test/java/com/example/maximumsessions/MaximumSessionsApplicationPreventLoginTests.java

@@ -0,0 +1,89 @@
+package com.example.maximumsessions;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseCookie;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.reactive.function.BodyInserters;
+
+import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.csrf;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureWebTestClient
+@TestPropertySource(properties = "prevent-login=true")
+class MaximumSessionsApplicationPreventLoginTests {
+
+	@Autowired
+	WebTestClient client;
+
+	@Test
+	void loginWhenUserAndMaximumSessionsOf1ExceededThenSecondLoginProhibited() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "user");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		login(data).expectStatus().isFound().expectHeader().location("/login?error");
+
+		performHello(firstLoginCookie).expectStatus().isOk();
+	}
+
+	@Test
+	void loginWhenAdminAndMaximumSessionsOf2ExceededThenThirdLoginProhibited() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "admin");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		ResponseCookie secondLoginCookie = loginReturningCookie(data);
+
+		// update last access time for first login session
+		performHello(firstLoginCookie).expectStatus().isOk();
+
+		login(data).expectStatus().isFound().expectHeader().location("/login?error");
+
+		performHello(firstLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(secondLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+	}
+
+	@Test
+	void loginWhenAuthenticationHasUnlimitedSessionsThenLoginIsAlwaysAllowed() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "unlimited");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		ResponseCookie secondLoginCookie = loginReturningCookie(data);
+		ResponseCookie thirdLoginCookie = loginReturningCookie(data);
+		ResponseCookie fourthLoginCookie = loginReturningCookie(data);
+		ResponseCookie fifthLoginCookie = loginReturningCookie(data);
+
+		performHello(firstLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(secondLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(thirdLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(fourthLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(fifthLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+	}
+
+	private WebTestClient.ResponseSpec performHello(ResponseCookie cookie) {
+		return this.client.get().uri("/hello").cookie(cookie.getName(), cookie.getValue()).exchange();
+	}
+
+	private ResponseCookie loginReturningCookie(MultiValueMap<String, String> data) {
+		return login(data).expectCookie().exists("SESSION").returnResult(Void.class).getResponseCookies()
+				.getFirst("SESSION");
+	}
+
+	private WebTestClient.ResponseSpec login(MultiValueMap<String, String> data) {
+		return this.client.mutateWith(csrf()).post().uri("/login").contentType(MediaType.MULTIPART_FORM_DATA)
+				.body(BodyInserters.fromFormData(data)).exchange();
+	}
+
+}

+ 90 - 0
reactive/webflux/java/session-management/maximum-sessions/src/test/java/com/example/maximumsessions/MaximumSessionsApplicationTests.java

@@ -0,0 +1,90 @@
+package com.example.maximumsessions;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseCookie;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.reactive.function.BodyInserters;
+
+import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.csrf;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureWebTestClient
+class MaximumSessionsApplicationTests {
+
+	@Autowired
+	WebTestClient client;
+
+	@Test
+	void loginWhenUserAndMaximumSessionsOf1ExceededThenLeastUsedInvalidated() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "user");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		ResponseCookie secondLoginCookie = loginReturningCookie(data);
+
+		performHello(firstLoginCookie).expectStatus().isFound().expectHeader().location("/login");
+
+		performHello(secondLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+	}
+
+	@Test
+	void loginWhenAdminAndMaximumSessionsOf2ExceededThenLeastUsedInvalidated() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "admin");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		ResponseCookie secondLoginCookie = loginReturningCookie(data);
+
+		// update last access time for first login session
+		performHello(firstLoginCookie).expectStatus().isOk();
+
+		ResponseCookie thirdLoginCookie = loginReturningCookie(data);
+
+		performHello(firstLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(secondLoginCookie).expectStatus().isFound().expectHeader().location("/login");
+		performHello(thirdLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+	}
+
+	@Test
+	void loginWhenAuthenticationHasUnlimitedSessionsThenSessionsAreValid() {
+		MultiValueMap<String, String> data = new LinkedMultiValueMap<>();
+		data.add("username", "unlimited");
+		data.add("password", "password");
+
+		ResponseCookie firstLoginCookie = loginReturningCookie(data);
+		ResponseCookie secondLoginCookie = loginReturningCookie(data);
+		ResponseCookie thirdLoginCookie = loginReturningCookie(data);
+		ResponseCookie fourthLoginCookie = loginReturningCookie(data);
+		ResponseCookie fifthLoginCookie = loginReturningCookie(data);
+
+		performHello(firstLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(secondLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(thirdLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(fourthLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+		performHello(fifthLoginCookie).expectStatus().isOk().expectBody(String.class).isEqualTo("Hello!");
+	}
+
+	private WebTestClient.ResponseSpec performHello(ResponseCookie cookie) {
+		return this.client.get().uri("/hello").cookie(cookie.getName(), cookie.getValue()).exchange();
+	}
+
+	private ResponseCookie loginReturningCookie(MultiValueMap<String, String> data) {
+		return login(data).expectCookie().exists("SESSION").returnResult(Void.class).getResponseCookies()
+				.getFirst("SESSION");
+	}
+
+	private WebTestClient.ResponseSpec login(MultiValueMap<String, String> data) {
+		return this.client.mutateWith(csrf()).post().uri("/login").contentType(MediaType.MULTIPART_FORM_DATA)
+				.body(BodyInserters.fromFormData(data)).exchange();
+	}
+
+}

+ 1 - 0
settings.gradle

@@ -31,6 +31,7 @@ include ":reactive:webflux:java:method"
 include ":reactive:webflux:java:oauth2:login"
 include ":reactive:webflux:java:oauth2:resource-server"
 include ":reactive:webflux:java:oauth2:webclient"
+include ":reactive:webflux:java:session-management:maximum-sessions"
 include ":reactive:webflux:kotlin:hello-security"
 include ":servlet:java-configuration:aspectj"
 include ":servlet:java-configuration:authentication:preauth"