SSL 异常：在初始化 Alexa 技能管理 API (SMAPI) 时“在握手期间收到 close_notify”

Question

我正在尝试使用 SMAPI 通过 Java 与我的 Alexa Skill 进行交互。

以下代码失败：

package io.mirko.impl;

import com.amazon.ask.model.services.skillManagement.SkillManagementService;
import com.amazon.ask.smapi.SmapiClients;
import org.junit.jupiter.api.Test;

public class IntegrationTest {
    // These come from `ask util generate-lwa-tokens` passing ClientID and SecretID from LWA
    private static final String CLIENT_ID = "<client_id>";
    private static final String CLIENT_SECRET = "<client_secret>";
    private static final String REFRESH_TOKEN = "<refresh_token>";
    private static final String SKILL_ID = "<skill_id>";
    @Test
    public void test() {
        final SkillManagementService smapiClient = SmapiClients.createDefault(
                CLIENT_ID,
                CLIENT_SECRET,
                REFRESH_TOKEN
        );
        System.out.println(smapiClient.getSkillManifestV1(SKILL_ID, "developement"));
    }
}

您可以在this link 找到 SSL 日志 失败如下：

"throwable" : {
  javax.net.ssl.SSLProtocolException: Received close_notify during handshake
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:126)
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:308)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:255)
    at java.base/sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:244)
    at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:181)
    at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:164)
    at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1152)
    at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1063)
    at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:402)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:436)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:384)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:374)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
    at com.amazon.ask.services.ApacheHttpApiClient.invoke(ApacheHttpApiClient.java:70)
    at com.amazon.ask.model.services.BaseServiceClient.executeRequest(BaseServiceClient.java:124)
    at com.amazon.ask.model.services.BaseServiceClient.invoke(BaseServiceClient.java:87)
    at com.amazon.ask.model.services.lwa.LwaClient.generateAccessToken(LwaClient.java:112)
    at com.amazon.ask.model.services.lwa.LwaClient.getAccessTokenForScope(LwaClient.java:82)
    at com.amazon.ask.model.services.lwa.LwaClient.getAccessTokenForRefreshToken(LwaClient.java:65)
    at com.amazon.ask.model.services.skillManagement.SkillManagementServiceClient.callGetSkillManifestV1(SkillManagementServiceClient.java:3484)
    at com.amazon.ask.model.services.skillManagement.SkillManagementServiceClient.getSkillManifestV1(SkillManagementServiceClient.java:3513)
    at io.mirko.impl.IntegrationTest.test(IntegrationTest.java:20)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
    at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
    at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:74)
    at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:202)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)}

)
javax.net.ssl|DEBUG|01|main|2019-12-21 12:34:44.530 CET|SSLSocketImpl.java:1361|close the underlying socket
javax.net.ssl|DEBUG|01|main|2019-12-21 12:34:44.531 CET|SSLSocketImpl.java:1380|close the SSL connection (passive)


com.amazon.ask.model.services.ServiceException: Call to service failed: There was an error executing the request

    at com.amazon.ask.model.services.BaseServiceClient.executeRequest(BaseServiceClient.java:126)
    at com.amazon.ask.model.services.BaseServiceClient.invoke(BaseServiceClient.java:87)
    at com.amazon.ask.model.services.lwa.LwaClient.generateAccessToken(LwaClient.java:112)
    at com.amazon.ask.model.services.lwa.LwaClient.getAccessTokenForScope(LwaClient.java:82)
    at com.amazon.ask.model.services.lwa.LwaClient.getAccessTokenForRefreshToken(LwaClient.java:65)
    at com.amazon.ask.model.services.skillManagement.SkillManagementServiceClient.callGetSkillManifestV1(SkillManagementServiceClient.java:3484)
    at com.amazon.ask.model.services.skillManagement.SkillManagementServiceClient.getSkillManifestV1(SkillManagementServiceClient.java:3513)
    at io.mirko.impl.IntegrationTest.test(IntegrationTest.java:20)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
    at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
    at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
    at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:74)
    at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
    at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
    at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:202)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
    at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
    at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
    at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
    at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
    at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
    at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
    at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
Caused by: java.lang.RuntimeException: There was an error executing the request
    at com.amazon.ask.services.ApacheHttpApiClient.invoke(ApacheHttpApiClient.java:74)
    at com.amazon.ask.model.services.BaseServiceClient.executeRequest(BaseServiceClient.java:124)
    ... 70 more
Caused by: javax.net.ssl.SSLProtocolException: Received close_notify during handshake
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:126)
    at java.base/sun.security.ssl.Alert.createSSLException(Alert.java:117)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:308)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:264)
    at java.base/sun.security.ssl.TransportContext.fatal(TransportContext.java:255)
    at java.base/sun.security.ssl.Alert$AlertConsumer.consume(Alert.java:244)
    at java.base/sun.security.ssl.TransportContext.dispatch(TransportContext.java:181)
    at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:164)
    at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1152)
    at java.base/sun.security.ssl.SSLSocketImpl.readHandshakeRecord(SSLSocketImpl.java:1063)
    at java.base/sun.security.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:402)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.createLayeredSocket(SSLConnectionSocketFactory.java:436)
    at org.apache.http.conn.ssl.SSLConnectionSocketFactory.connectSocket(SSLConnectionSocketFactory.java:384)
    at org.apache.http.impl.conn.DefaultHttpClientConnectionOperator.connect(DefaultHttpClientConnectionOperator.java:142)
    at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.connect(PoolingHttpClientConnectionManager.java:374)
    at org.apache.http.impl.execchain.MainClientExec.establishRoute(MainClientExec.java:393)
    at org.apache.http.impl.execchain.MainClientExec.execute(MainClientExec.java:236)
    at org.apache.http.impl.execchain.ProtocolExec.execute(ProtocolExec.java:186)
    at org.apache.http.impl.execchain.RetryExec.execute(RetryExec.java:89)
    at org.apache.http.impl.execchain.RedirectExec.execute(RedirectExec.java:110)
    at org.apache.http.impl.client.InternalHttpClient.doExecute(InternalHttpClient.java:185)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:83)
    at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:108)
    at com.amazon.ask.services.ApacheHttpApiClient.invoke(ApacheHttpApiClient.java:70)
    ... 71 more



Process finished with exit code 255

相比之下，以下 vanilla Java 代码运行良好，我可以获得访问令牌：

package io.mirko;

import org.apache.http.HttpHost;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.protocol.BasicHttpContext;

import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.URL;
import java.nio.charset.StandardCharsets;

public class Main {
    private static final String HOST = "api.amazon.com";
    private static final String URL = String.format("https://%s/auth/O2/token", HOST);
    private static final String URL_PARAMETERS = "grant_type=refresh_token&client_id=<client_id>&client_secret=<client_secret>&refresh_token=<refresh_token>";

    private static String connectVanillaJava() throws Exception {
        byte[] postData = URL_PARAMETERS.getBytes( StandardCharsets.UTF_8 );
        int postDataLength = postData.length;
        URL url = new URL(URL);
        HttpURLConnection conn= (HttpURLConnection) url.openConnection();
        conn.setDoOutput(true);
        conn.setInstanceFollowRedirects(false);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        conn.setRequestProperty("charset", "utf-8");
        conn.setRequestProperty("Content-Length", Integer.toString(postDataLength ));
        conn.setUseCaches(false);
        try(DataOutputStream wr = new DataOutputStream(conn.getOutputStream())) {
            wr.write( postData );
        }
        DataInputStream is = new DataInputStream(conn.getInputStream());
        byte[] data = new byte[32768];
        final ByteArrayOutputStream os = new ByteArrayOutputStream();
        for (int i = is.read(data); i > 0; i = is.read(data)) {
            os.write(data, 0, i);
        }
        return new String(os.toByteArray());
    }

    public static void main(String ... args) throws Exception {
        System.out.print("Test Vanilla Java...");
        final String vanillaJavaResult = connectVanillaJava();
        System.out.format("SUCCESS!\nReturned %s\n", vanillaJavaResult);
    }
}

您可以获得here SSL 日志以及返回的响应，

我可以看到的主要区别是，在Produced client Finished handshake message 之后，在第一种情况下，超过 10 秒后，我收到了错误，而在工作示例中，我收到了Consuming server Finished handshake message。

感谢您的帮助。

附：根据 SSL 日志的差异，似乎是损坏的交互从api.amazonalexa.com 接收 SSL 证书，即 DOWN。通过浏览访问该主机，我收到this message。它说该网站暂时不可用。 我已经使用该主机修改了工作示例，似乎我得到了同样的错误。

P.P.S.我设法通过使用api.amazon.com 创建一个LWAClient 来获取身份验证令牌。与api.amazonalexa.com 的任何交互都会引发上述问题。

inal LwaClient lwaClient = LwaClient.builder()
                .withAuthenticationConfiguration(
                        DefaultAuthenticationConfiguration.builder()
                                .withClientSecret(CLIENT_SECRET)
                                .withClientId(CLIENT_ID)
                                .withRefreshToken(REFRESH_TOKEN)
                                .build()
                )
                .withGrantType(GrantType.REFRESH_TOKEN)
                .withApiConfiguration(DefaultApiConfiguration.builder()
                        .withApiClient(apiConfiguration.getApiClient())
                        // Without this, it does not work
                        .withApiEndpoint("https://api.amazon.com")
                        .withSerializer(apiConfiguration.getSerializer())
                        .build())
                .build();
        final SkillManagementServiceClient myClient = new SkillManagementServiceClient(
                apiConfiguration, lwaClient);
        // This WORKS
        System.out.println(lwaClient.getAccessTokenForRefreshToken());

Answer 1

最后我设法解决了这个问题。 通过在调试模式下运行代码，可以捕获将要运行且与问题相关的请求。 如果您使用curl 调用该请求，您会立即收到一个错误，即 自我解释：

curl -vvv -X POST -H "Content-Type: application/json" -H "Authorization: Bearer Atza|XXXXX" -d "{}" https://api.amazonalexa.com/v1/skills/<skill_id>/simulations
Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 143.204.11.219...
* TCP_NODELAY set
* Connected to api.amazonalexa.com (143.204.11.219) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* successfully set certificate verify locations:
*   CAfile: /etc/ssl/certs/ca-certificates.crt
  CApath: /etc/ssl/certs
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* TLSv1.2 (IN), TLS handshake, Finished (20):
* SSL connection using TLSv1.2 / ECDHE-RSA-AES128-GCM-SHA256
* ALPN, server accepted to use h2
* Server certificate:
*  subject: CN=api.amazonalexa.com
*  start date: May  3 00:00:00 2019 GMT
*  expire date: Apr 26 12:00:00 2020 GMT
*  subjectAltName: host "api.amazonalexa.com" matched cert's "api.amazonalexa.com"
*  issuer: C=US; O=Amazon; OU=Server CA 1B; CN=Amazon
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x55ba1fa314b0)
> POST /v1/skills/<skill_id>/simulations HTTP/2
> Host: api.amazonalexa.com
> User-Agent: curl/7.58.0
> Accept: */*
> Content-Type: application/json
> Authorization: Bearer Atza|xxxxx
> Content-Length: 2
> 
* Connection state changed (MAX_CONCURRENT_STREAMS updated)!
* We are completely uploaded and fine
< HTTP/2 400 
< content-type: application/json
< content-length: 110
< server: Server
< date: Thu, 26 Dec 2019 15:53:04 GMT
< x-amzn-requestid: 300413fa-09db-4a13-95a7-a4749ef5130a
< x-amz-date: Thu, 26 Dec 2019 15:53:04 GMT
< vary: Accept-Encoding,X-Amzn-CDN-Cache,X-Amzn-AX-Treatment,User-Agent
< x-amz-rid: 4TW7K1A311QVNFQ8M6BJ
< x-cache: Error from cloudfront
< via: 1.1 1a3a682cf8d843fe52f3224f60584fad.cloudfront.net (CloudFront)
< x-amz-cf-pop: MXP64-C1
< x-amz-cf-id: djdsKqkXYy8BOzvhZyD9G2iUXa8NeLscxBi45x4fs6EUc3C6tOrD6Q==
< 
* Connection #0 to host api.amazonalexa.com left intact
{"message":"Invalid request payload. Please ensure that the request payload has all required fields present."}

我不明白为什么 Java 库会在这种情况下卡住。

总而言之，我的问题解决了。