我使用Async Apache HttpClient（CloseableHttpAsyncClient）连接到服务器但我遇到以下异常：
javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:130)
at org.apache.http.impl.nio.client.DefaultClientExchangeHandlerImpl.failed(DefaultClientExchangeHandlerImpl.java:258)
at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.exception(HttpAsyncRequestExecutor.java:123)
at org.apache.http.impl.nio.client.InternalIODispatch.onException(InternalIODispatch.java:68)
at org.apache.http.impl.nio.client.InternalIODispatch.onException(InternalIODispatch.java:37)
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:124)
at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:159)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:338)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:316)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:277)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:105)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:584)
at java.lang.Thread.run(Thread.java:695)
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at com.sun.net.ssl.internal.ssl.Handshaker.checkThrown(Handshaker.java:1015)
at com.sun.net.ssl.internal.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:485)
at com.sun.net.ssl.internal.ssl.SSLEngineImpl.writeAppRecord(SSLEngineImpl.java:1108)
at com.sun.net.ssl.internal.ssl.SSLEngineImpl.wrap(SSLEngineImpl.java:1080)
at javax.net.ssl.SSLEngine.wrap(SSLEngine.java:452)
at org.apache.http.nio.reactor.ssl.SSLIOSession.doWrap(SSLIOSession.java:220)
at org.apache.http.nio.reactor.ssl.SSLIOSession.doHandshake(SSLIOSession.java:254)
at org.apache.http.nio.reactor.ssl.SSLIOSession.isAppInputReady(SSLIOSession.java:391)
at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:119)
... 7 more
Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:174)
at com.sun.net.ssl.internal.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1508)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:243)
at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Handshaker.java:235)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1209)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:135)
at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Handshaker.java:593)
at com.sun.net.ssl.internal.ssl.Handshaker$1.run(Handshaker.java:533)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.net.ssl.internal.ssl.Handshaker$DelegatedTask.run(Handshaker.java:952)
at org.apache.http.nio.reactor.ssl.SSLIOSession.doRunTask(SSLIOSession.java:238)
at org.apache.http.nio.reactor.ssl.SSLIOSession.doHandshake(SSLIOSession.java:276)
... 9 more
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:323)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:217)
at sun.security.validator.Validator.validate(Validator.java:218)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:126)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:209)
at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:249)
at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1188)
... 16 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:174)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:238)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:318)
... 22 more
由于这是一个测试服务器，我只想让CloseableHttpAsyncClient忽略所有SSL错误。我知道如何使用HttpClient的非异步版本（例如，已经回答here）但是我无法使用异步版本来实现此功能。
我尝试过以下方法：
TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
public boolean isTrusted(X509Certificate[] certificate, String authType) {
return true;
}
};
SSLContext sslContext = null;
try {
sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
} catch (Exception e) {
// Handle error
}
CloseableHttpAsyncClient client = HttpAsyncClients.custom()
.setHostnameVerifier(SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER)
.setSSLContext(sslContext).build();
但它不起作用。有谁知道如何解决这个问题？
答案 0 :(得分：5)
实际上我在我的问题中提供的代码是有效的。问题是我正在使用Unirest（它使用Apache HttpClient）并且已经像这样配置了它：
Unirest.setAsyncHttpClient(createHttpAsyncClient(CONNECTION_TIMEOUT, SOCKET_TIMEOUT));
Unirest.setTimeouts(CONNECTION_TIMEOUT, SOCKET_TIMEOUT);
问题在于＆＃34; setTimeouts＆＃34;覆盖了我在createHttpAsyncClient中做出的配置而没有任何指示。改为
Unirest.setTimeouts(CONNECTION_TIMEOUT, SOCKET_TIMEOUT);
Unirest.setAsyncHttpClient(createHttpAsyncClient(CONNECTION_TIMEOUT, SOCKET_TIMEOUT));
让一切顺利。
因此，如果其他人对普通的异步Apache HTTPClient有同样的问题，那么让它信任所有证书的代码如下：
TrustStrategy acceptingTrustStrategy = new TrustStrategy() {
public boolean isTrusted(X509Certificate[] certificate, String authType) {
return true;
}
};
SSLContext sslContext = null;
try {
sslContext = SSLContexts.custom().loadTrustMaterial(null, acceptingTrustStrategy).build();
} catch (Exception e) {
// Handle error
}
CloseableHttpAsyncClient client = HttpAsyncClients.custom()
.setHostnameVerifier(SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER)
.setSSLContext(sslContext).build();
答案 1 :(得分：0)
我怀疑这个问题与主机名验证无关。在协商SSL会话之前，SSL握手可能会更早失败。这种失败可能有多种原因，最有可能是SSL协议版本不匹配。您应该在激活SSL调试日志的情况下运行应用程序（使用-Djavax.net.debug=all系统属性）并分析日志输出