如何在Java中通过代理发送HTTPS请求?
我正在尝试使用 HttpsUrlConnection 类向服务器发送请求。服务器存在证书问题,因此我设置了一个信任所有内容的 TrustManager,以及一个同样宽松的主机名验证器。当我直接发出请求时,此管理器工作正常,但是当我通过代理发送请求时,它似乎根本没有使用。
我像这样设置我的代理设置:
Properties systemProperties = System.getProperties();
systemProperties.setProperty( "http.proxyHost", "proxyserver" );
systemProperties.setProperty( "http.proxyPort", "8080" );
systemProperties.setProperty( "https.proxyHost", "proxyserver" );
systemProperties.setProperty( "https.proxyPort", "8080" );
默认 SSLSocketFactory 的 TrustManager 设置如下:
SSLContext sslContext = SSLContext.getInstance( "SSL" );
// set up a TrustManager that trusts everything
sslContext.init( null, new TrustManager[]
{
new X509TrustManager()
{
public X509Certificate[] getAcceptedIssuers()
{
return null;
}
public void checkClientTrusted( X509Certificate[] certs, String authType )
{
// everything is trusted
}
public void checkServerTrusted( X509Certificate[] certs, String authType )
{
// everything is trusted
}
}
}, new SecureRandom() );
// this doesn't seem to apply to connections through a proxy
HttpsURLConnection.setDefaultSSLSocketFactory( sslContext.getSocketFactory() );
// setup a hostname verifier that verifies everything
HttpsURLConnection.setDefaultHostnameVerifier( new HostnameVerifier()
{
public boolean verify( String arg0, SSLSession arg1 )
{
return true;
}
} );
如果我运行以下代码,我最终会得到一个SSLHandshakException(“握手期间远程主机关闭连接”):
URL url = new URL( "https://someurl" );
HttpsURLConnection connection = (HttpsURLConnection)url.openConnection();
connection.setDoOutput( true );
connection.setRequestMethod( "POST" );
connection.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded" );
connection.setRequestProperty( "Content-Length", "0" );
connection.connect();
我假设我错过了某种与处理SSL时使用代理有关的设置。如果我不使用代理,我的检查ServerTrusted方法将被调用;这也是我在通过代理时需要发生的事情。
我通常不处理Java,我对HTTP / Web的东西没有太多经验。我相信我已经提供了所有必要的细节来理解我想要做什么。如果不是这种情况,请告诉我。
更新:
在阅读了ZZ Coder建议的文章后,我对连接代码进行了以下更改:
HttpsURLConnection connection = (HttpsURLConnection)url.openConnection();
connection.setSSLSocketFactory( new SSLTunnelSocketFactory( proxyHost, proxyPort ) );
connection.setDoOutput( true );
connection.setRequestMethod( "POST" );
connection.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded" );
connection.setRequestProperty( "Content-Length", "0" );
connection.connect();
结果(SSLHandshakeException)是相同的。当我将这里的SLLSocketFactory设置为SSLTunnelSocketFactory(本文中解释的类)时,我用TrustManager和SSLContext所做的操作被覆盖了。难道我还需要它吗?
另一个更新:
我修改了SSLTunnelSocketFactory类,以使用SSSocketFactory,它使用我的TrustManager来信任所有内容。这似乎没有任何区别。这是SSLTunnelSocketFactory的createSocket方法:
public Socket createSocket( Socket s, String host, int port, boolean autoClose )
throws IOException, UnknownHostException
{
Socket tunnel = new Socket( tunnelHost, tunnelPort );
doTunnelHandshake( tunnel, host, port );
SSLSocket result = (SSLSocket)dfactory.createSocket(
tunnel, host, port, autoClose );
result.addHandshakeCompletedListener(
new HandshakeCompletedListener()
{
public void handshakeCompleted( HandshakeCompletedEvent event )
{
System.out.println( "Handshake finished!" );
System.out.println(
"\t CipherSuite:" + event.getCipherSuite() );
System.out.println(
"\t SessionId " + event.getSession() );
System.out.println(
"\t PeerHost " + event.getSession().getPeerHost() );
}
} );
result.startHandshake();
return result;
}
当我的代码调用 connection.connect 时,将调用此方法,并且对 doTunnelHandshake 的调用成功。下一行代码使用我的SSLSocketFactory来创建一个SSLSocket;此调用后结果的 toString 值为:
“1d49247[SSL_NULL_WITH_NULL_NULL: Socket[addr=/proxyHost,port=proxyPort,localport=24372]]”。
这对我来说毫无意义,但这可能是事情在此之后崩溃的原因。
当调用 result.startHandshake() 时,根据调用堆栈 HttpsClient.afterConnect,使用相同的参数再次调用相同的 createSocket 方法,除了 Socket s 为 null,当它再次出现 result.startHandshake() 时,结果是相同的 SSLHandshakeException。
在这个日益复杂的拼图中,我是否仍然缺少一个重要的部分?
这是堆栈跟踪:
javax.net.ssl.SSLHandshakeException: Remote host closed connection during handshake at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:808) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1112) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1139) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(SSLSocketImpl.java:1123) at gsauthentication.SSLTunnelSocketFactory.createSocket(SSLTunnelSocketFactory.java:106) at sun.net.www.protocol.https.HttpsClient.afterConnect(HttpsClient.java:391) at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:166) at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:133) at gsauthentication.GSAuthentication.main(GSAuthentication.java:52) Caused by: java.io.EOFException: SSL peer shut down incorrectly at com.sun.net.ssl.internal.ssl.InputRecord.read(InputRecord.java:333) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:789) ... 8 more