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Merge from sbrannen/SPR-8032 

* SPR-8032:
  Introduce TCP & UDP server port scanning utility
pull/640/head
Sam Brannen 13 years ago
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e12311e364 f311bf3daf
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6 changed files with 516 additions and 119 deletions
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  1. 323
      spring-core/src/main/java/org/springframework/util/SocketUtils.java
  2. 180
      spring-core/src/test/java/org/springframework/util/SocketUtilsTests.java
  3. 9
      spring-web/src/test/java/org/springframework/http/client/AbstractHttpRequestFactoryTestCase.java
  4. 99
      spring-web/src/test/java/org/springframework/tests/web/FreePortScanner.java
  5. 15
      spring-web/src/test/java/org/springframework/web/client/RestTemplateIntegrationTests.java
  6. 9
      spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestPartIntegrationTests.java

323
spring-core/src/main/java/org/springframework/util/SocketUtils.java
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@ -0,0 +1,323 @@ @@ -0,0 +1,323 @@
/*
* Copyright 2002-2013 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
*
* http://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 org.springframework.util;
import java.net.DatagramSocket;
import java.net.ServerSocket;
import java.util.Random;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.net.ServerSocketFactory;
/**
* Simple utility methods for working with network sockets — for example,
* for finding available ports on {@code localhost}.
*
* <p>Within this class, a TCP port refers to a port for a {@link ServerSocket};
* whereas, a UDP port refers to a port for a {@link DatagramSocket}.
*
* @author Sam Brannen
* @author Ben Hale
* @author Arjen Poutsma
* @author Gunnar Hillert
* @since 4.0
*/
public final class SocketUtils {
/**
* The default minimum value for port ranges used when finding an available
* socket port.
*/
public static final int PORT_RANGE_MIN = 1024;
/**
* The default maximum value for port ranges used when finding an available
* socket port.
*/
public static final int PORT_RANGE_MAX = 65535;
private static final Random random = new Random(System.currentTimeMillis());
/**
* Although {@code SocketUtils} consists solely of static utility methods,
* this constructor is intentionally {@code public}.
*
* <h4>Rationale</h4>
*
* <p>Static methods from this class may be invoked from within XML
* configuration files using the Spring Expression Language (SpEL) and the
* following syntax.
*
* <pre><code>&lt;bean id="bean1" ... p:port="#{T(org.springframework.util.SocketUtils).findAvailableTcpPort(12000)}" /&gt;</code></pre>
*
* If this constructor were {@code private}, you would be required to supply
* the fully qualified class name to SpEL's {@code T()} function for each usage.
* Thus, the fact that this constructor is {@code public} allows you to reduce
* boilerplate configuration with SpEL as can be seen in the following example.
*
* <pre><code>&lt;bean id="socketUtils" class="org.springframework.util.SocketUtils" /&gt;
*
*&lt;bean id="bean1" ... p:port="#{socketUtils.findAvailableTcpPort(12000)}" /&gt;
*
*&lt;bean id="bean2" ... p:port="#{socketUtils.findAvailableTcpPort(30000)}" /&gt;</code></pre>
*/
public SocketUtils() {
/* no-op */
}
/**
* Find an available TCP port randomly selected from the range
* [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort() {
return findAvailableTcpPort(PORT_RANGE_MIN);
}
/**
* Find an available TCP port randomly selected from the range
* [{@code minPort}, {@value #PORT_RANGE_MAX}].
*
* @param minPort the minimum port number
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort(int minPort) {
return findAvailableTcpPort(minPort, PORT_RANGE_MAX);
}
/**
* Find an available TCP port randomly selected from the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available TCP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableTcpPort(int minPort, int maxPort) {
return SocketType.TCP.findAvailablePort(minPort, maxPort);
}
/**
* Find the requested number of available TCP ports, each randomly selected
* from the range [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @param numRequested the number of available ports to find
* @return a sorted set of available TCP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableTcpPorts(int numRequested) {
return findAvailableTcpPorts(numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
/**
* Find the requested number of available TCP ports, each randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available TCP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableTcpPorts(int numRequested, int minPort, int maxPort) {
return SocketType.TCP.findAvailablePorts(numRequested, minPort, maxPort);
}
/**
* Find an available UDP port randomly selected from the range
* [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort() {
return findAvailableUdpPort(PORT_RANGE_MIN);
}
/**
* Find an available UDP port randomly selected from the range
* [{@code minPort}, {@value #PORT_RANGE_MAX}].
*
* @param minPort the minimum port number
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort(int minPort) {
return findAvailableUdpPort(minPort, PORT_RANGE_MAX);
}
/**
* Find an available UDP port randomly selected from the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available UDP port number
* @throws IllegalStateException if no available port could be found
*/
public static int findAvailableUdpPort(int minPort, int maxPort) {
return SocketType.UDP.findAvailablePort(minPort, maxPort);
}
/**
* Find the requested number of available UDP ports, each randomly selected
* from the range [{@value #PORT_RANGE_MIN}, {@value #PORT_RANGE_MAX}].
*
* @param numRequested the number of available ports to find
* @return a sorted set of available UDP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableUdpPorts(int numRequested) {
return findAvailableUdpPorts(numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
/**
* Find the requested number of available UDP ports, each randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available UDP port numbers
* @throws IllegalStateException if the requested number of available ports could not be found
*/
public static SortedSet<Integer> findAvailableUdpPorts(int numRequested, int minPort, int maxPort) {
return SocketType.UDP.findAvailablePorts(numRequested, minPort, maxPort);
}
private static enum SocketType {
TCP {
@Override
protected boolean isPortAvailable(int port) {
try {
ServerSocket serverSocket = ServerSocketFactory.getDefault().createServerSocket(port);
serverSocket.close();
return true;
}
catch (Exception ex) {
return false;
}
}
},
UDP {
@Override
protected boolean isPortAvailable(int port) {
try {
DatagramSocket socket = new DatagramSocket(port);
socket.close();
return true;
}
catch (Exception ex) {
return false;
}
}
};
/**
* Determine if the specified port for this {@code SocketType} is
* currently available on {@code localhost}.
*/
protected abstract boolean isPortAvailable(int port);
/**
* Find a pseudo-random port number within the range
* [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a random port number within the specified range
*/
private int findRandomPort(int minPort, int maxPort) {
int portRange = maxPort - minPort;
return minPort + random.nextInt(portRange);
}
/**
* Find an available port for this {@code SocketType}, randomly selected
* from the range [{@code minPort}, {@code maxPort}].
*
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return an available port number for this socket type
* @throws IllegalStateException if no available port could be found
*/
int findAvailablePort(int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be greater than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be greater than 'minPort'");
Assert.isTrue(maxPort <= PORT_RANGE_MAX, "'maxPort' must be less than or equal to " + PORT_RANGE_MAX);
int portRange = maxPort - minPort;
int candidatePort;
int searchCounter = 0;
do {
if (++searchCounter > portRange) {
throw new IllegalStateException(String.format(
"Could not find an available %s port in the range [%d, %d] after %d attempts", name(), minPort,
maxPort, searchCounter));
}
candidatePort = findRandomPort(minPort, maxPort);
} while (!isPortAvailable(candidatePort));
return candidatePort;
}
/**
* Find the requested number of available ports for this {@code SocketType},
* each randomly selected from the range [{@code minPort}, {@code maxPort}].
*
* @param numRequested the number of available ports to find
* @param minPort the minimum port number
* @param maxPort the maximum port number
* @return a sorted set of available port numbers for this socket type
* @throws IllegalStateException if the requested number of available ports could not be found
*/
SortedSet<Integer> findAvailablePorts(int numRequested, int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be greater than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be greater than 'minPort'");
Assert.isTrue(maxPort <= PORT_RANGE_MAX, "'maxPort' must be less than or equal to " + PORT_RANGE_MAX);
Assert.isTrue(numRequested > 0, "'numRequested' must be greater than 0");
Assert.isTrue((maxPort - minPort) >= numRequested,
"'numRequested' must not be greater than 'maxPort' - 'minPort'");
final SortedSet<Integer> availablePorts = new TreeSet<Integer>();
int attemptCount = 0;
while ((++attemptCount <= numRequested + 100) && (availablePorts.size() < numRequested)) {
availablePorts.add(findAvailablePort(minPort, maxPort));
}
if (availablePorts.size() != numRequested) {
throw new IllegalStateException(String.format(
"Could not find %d available %s ports in the range [%d, %d]", numRequested, name(), minPort,
maxPort));
}
return availablePorts;
}
}
}

180
spring-core/src/test/java/org/springframework/util/SocketUtilsTests.java
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@ -0,0 +1,180 @@ @@ -0,0 +1,180 @@
/*
* Copyright 2002-2013 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
*
* http://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 org.springframework.util;
import java.util.SortedSet;
import org.junit.Test;
import static org.junit.Assert.*;
import static org.springframework.util.SocketUtils.*;
/**
* Unit tests for {@link SocketUtils}.
*
* @author Sam Brannen
* @since 4.0
*/
public class SocketUtilsTests {
private void assertPortInRange(int port, int minPort, int maxPort) {
assertTrue("port [" + port + "] >= " + minPort, port >= minPort);
assertTrue("port [" + port + "] <= " + maxPort, port <= maxPort);
}
private void assertAvailablePorts(SortedSet<Integer> ports, int numRequested, int minPort, int maxPort) {
assertEquals("number of ports requested", numRequested, ports.size());
for (int port : ports) {
assertPortInRange(port, minPort, maxPort);
}
}
// --- TCP -----------------------------------------------------------------
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortWithZeroMinPort() {
SocketUtils.findAvailableTcpPort(0);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortWithNegativeMinPort() {
SocketUtils.findAvailableTcpPort(-500);
}
@Test
public void findAvailableTcpPort() {
int port = SocketUtils.findAvailableTcpPort();
assertPortInRange(port, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
@Test
public void findAvailableTcpPortWithMin() {
int port = SocketUtils.findAvailableTcpPort(50000);
assertPortInRange(port, 50000, PORT_RANGE_MAX);
}
@Test
public void findAvailableTcpPortInRange() {
int minPort = 20000;
int maxPort = minPort + 1000;
int port = SocketUtils.findAvailableTcpPort(minPort, maxPort);
assertPortInRange(port, minPort, maxPort);
}
@Test
public void find4AvailableTcpPorts() {
findAvailableTcpPorts(4);
}
@Test
public void find50AvailableTcpPorts() {
findAvailableTcpPorts(50);
}
@Test
public void find4AvailableTcpPortsInRange() {
findAvailableTcpPorts(4, 30000, 35000);
}
@Test
public void find50AvailableTcpPortsInRange() {
findAvailableTcpPorts(50, 40000, 45000);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableTcpPortsWithRequestedNumberGreaterThanSizeOfRange() {
findAvailableTcpPorts(50, 45000, 45010);
}
private void findAvailableTcpPorts(int numRequested) {
SortedSet<Integer> ports = SocketUtils.findAvailableTcpPorts(numRequested);
assertAvailablePorts(ports, numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
private void findAvailableTcpPorts(int numRequested, int minPort, int maxPort) {
SortedSet<Integer> ports = SocketUtils.findAvailableTcpPorts(numRequested, minPort, maxPort);
assertAvailablePorts(ports, numRequested, minPort, maxPort);
}
// --- UDP -----------------------------------------------------------------
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortWithZeroMinPort() {
SocketUtils.findAvailableUdpPort(0);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortWithNegativeMinPort() {
SocketUtils.findAvailableUdpPort(-500);
}
@Test
public void findAvailableUdpPort() {
int port = SocketUtils.findAvailableUdpPort();
assertPortInRange(port, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
@Test
public void findAvailableUdpPortWithMin() {
int port = SocketUtils.findAvailableUdpPort(50000);
assertPortInRange(port, 50000, PORT_RANGE_MAX);
}
@Test
public void findAvailableUdpPortInRange() {
int minPort = 20000;
int maxPort = minPort + 1000;
int port = SocketUtils.findAvailableUdpPort(minPort, maxPort);
assertPortInRange(port, minPort, maxPort);
}
@Test
public void find4AvailableUdpPorts() {
findAvailableUdpPorts(4);
}
@Test
public void find50AvailableUdpPorts() {
findAvailableUdpPorts(50);
}
@Test
public void find4AvailableUdpPortsInRange() {
findAvailableUdpPorts(4, 30000, 35000);
}
@Test
public void find50AvailableUdpPortsInRange() {
findAvailableUdpPorts(50, 40000, 45000);
}
@Test(expected = IllegalArgumentException.class)
public void findAvailableUdpPortsWithRequestedNumberGreaterThanSizeOfRange() {
findAvailableUdpPorts(50, 45000, 45010);
}
private void findAvailableUdpPorts(int numRequested) {
SortedSet<Integer> ports = SocketUtils.findAvailableUdpPorts(numRequested);
assertAvailablePorts(ports, numRequested, PORT_RANGE_MIN, PORT_RANGE_MAX);
}
private void findAvailableUdpPorts(int numRequested, int minPort, int maxPort) {
SortedSet<Integer> ports = SocketUtils.findAvailableUdpPorts(numRequested, minPort, maxPort);
assertAvailablePorts(ports, numRequested, minPort, maxPort);
}
}

9
spring-web/src/test/java/org/springframework/http/client/AbstractHttpRequestFactoryTestCase.java
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@ -16,9 +16,6 @@ @@ -16,9 +16,6 @@
package org.springframework.http.client;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
@ -43,8 +40,10 @@ import org.junit.BeforeClass; @@ -43,8 +40,10 @@ import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.SocketUtils;
import static org.junit.Assert.*;
public abstract class AbstractHttpRequestFactoryTestCase {
@ -56,7 +55,7 @@ public abstract class AbstractHttpRequestFactoryTestCase { @@ -56,7 +55,7 @@ public abstract class AbstractHttpRequestFactoryTestCase {
@BeforeClass
public static void startJettyServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
jettyServer = new Server(port);
baseUrl = "http://localhost:" + port;

99
spring-web/src/test/java/org/springframework/tests/web/FreePortScanner.java
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@ -1,99 +0,0 @@ @@ -1,99 +0,0 @@
/*
* Copyright 2002-2012 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
*
* http://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 org.springframework.tests.web;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.ServerSocket;
import java.util.Random;
import org.springframework.util.Assert;
/**
* Utility class that finds free BSD ports for use in testing scenario's.
*
* @author Ben Hale
* @author Arjen Poutsma
*/
public abstract class FreePortScanner {
private static final int MIN_SAFE_PORT = 1024;
private static final int MAX_PORT = 65535;
private static final Random random = new Random();
/**
* Returns the number of a free port in the default range.
*/
public static int getFreePort() {
return getFreePort(MIN_SAFE_PORT, MAX_PORT);
}
/**
* Returns the number of a free port in the given range.
*/
public static int getFreePort(int minPort, int maxPort) {
Assert.isTrue(minPort > 0, "'minPort' must be larger than 0");
Assert.isTrue(maxPort > minPort, "'maxPort' must be larger than minPort");
int portRange = maxPort - minPort;
int candidatePort;
int searchCounter = 0;
do {
if (++searchCounter > portRange) {
throw new IllegalStateException(
String.format("There were no ports available in the range %d to %d", minPort, maxPort));
}
candidatePort = getRandomPort(minPort, portRange);
}
while (!isPortAvailable(candidatePort));
return candidatePort;
}
private static int getRandomPort(int minPort, int portRange) {
return minPort + random.nextInt(portRange);
}
private static boolean isPortAvailable(int port) {
ServerSocket serverSocket;
try {
serverSocket = new ServerSocket();
}
catch (IOException ex) {
throw new IllegalStateException("Unable to create ServerSocket.", ex);
}
try {
InetSocketAddress sa = new InetSocketAddress(port);
serverSocket.bind(sa);
return true;
}
catch (IOException ex) {
return false;
}
finally {
try {
serverSocket.close();
}
catch (IOException ex) {
// ignore
}
}
}
}

15
spring-web/src/test/java/org/springframework/web/client/RestTemplateIntegrationTests.java
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@ -16,14 +16,6 @@ @@ -16,14 +16,6 @@
package org.springframework.web.client;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URI;
@ -63,10 +55,12 @@ import org.springframework.http.HttpStatus; @@ -63,10 +55,12 @@ import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.SocketUtils;
import static org.junit.Assert.*;
/** @author Arjen Poutsma */
public class RestTemplateIntegrationTests {
@ -83,7 +77,7 @@ public class RestTemplateIntegrationTests { @@ -83,7 +77,7 @@ public class RestTemplateIntegrationTests {
@BeforeClass
public static void startJettyServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
jettyServer = new Server(port);
baseUrl = "http://localhost:" + port;
ServletContextHandler handler = new ServletContextHandler();
@ -243,6 +237,7 @@ public class RestTemplateIntegrationTests { @@ -243,6 +237,7 @@ public class RestTemplateIntegrationTests {
}
@Test
@SuppressWarnings("unchecked")
public void exchangeGet() throws Exception {
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.set("MyHeader", "MyValue");

9
spring-webmvc/src/test/java/org/springframework/web/servlet/mvc/method/annotation/RequestPartIntegrationTests.java
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@ -16,8 +16,6 @@ @@ -16,8 +16,6 @@
package org.springframework.web.servlet.mvc.method.annotation;
import static org.junit.Assert.assertEquals;
import java.net.URI;
import java.util.Arrays;
@ -42,9 +40,9 @@ import org.springframework.http.converter.ResourceHttpMessageConverter; @@ -42,9 +40,9 @@ import org.springframework.http.converter.ResourceHttpMessageConverter;
import org.springframework.http.converter.json.MappingJacksonHttpMessageConverter;
import org.springframework.http.converter.support.AllEncompassingFormHttpMessageConverter;
import org.springframework.stereotype.Controller;
import org.springframework.tests.web.FreePortScanner;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.util.SocketUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestPart;
@ -58,6 +56,8 @@ import org.springframework.web.servlet.DispatcherServlet; @@ -58,6 +56,8 @@ import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import static org.junit.Assert.*;
/**
* Test access to parts of a multipart request with {@link RequestPart}.
*
@ -74,8 +74,7 @@ public class RequestPartIntegrationTests { @@ -74,8 +74,7 @@ public class RequestPartIntegrationTests {
@BeforeClass
public static void startServer() throws Exception {
int port = FreePortScanner.getFreePort();
int port = SocketUtils.findAvailableTcpPort();
baseUrl = "http://localhost:" + port;
server = new Server(port);

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