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HttpConnectSocketImpl.java
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210 lines (183 loc) · 6.6 KB
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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package java.net;
import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* Basic SocketImpl that relies on the internal HTTP protocol handler
* implementation to perform the HTTP tunneling and authentication. The
* sockets impl is swapped out and replaced with the socket from the HTTP
* handler after the tunnel is successfully setup.
*
* @since 1.8
*/
/*package*/ class HttpConnectSocketImpl extends PlainSocketImpl {
private static final String httpURLClazzStr =
"sun.net.www.protocol.http.HttpURLConnection";
private static final String netClientClazzStr = "sun.net.NetworkClient";
private static final String doTunnelingStr = "doTunneling";
private static final Field httpField;
private static final Field serverSocketField;
private static final Method doTunneling;
private final String server;
private InetSocketAddress external_address;
private HashMap<Integer, Object> optionsMap = new HashMap<>();
static {
try {
Class<?> httpClazz = Class.forName(httpURLClazzStr, true, null);
httpField = httpClazz.getDeclaredField("http");
doTunneling = httpClazz.getDeclaredMethod(doTunnelingStr);
Class<?> netClientClazz = Class.forName(netClientClazzStr, true, null);
serverSocketField = netClientClazz.getDeclaredField("serverSocket");
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction<Void>() {
public Void run() {
httpField.setAccessible(true);
serverSocketField.setAccessible(true);
return null;
}
});
} catch (ReflectiveOperationException x) {
throw new InternalError("Should not reach here", x);
}
}
HttpConnectSocketImpl(String server, int port) {
this.server = server;
this.port = port;
}
HttpConnectSocketImpl(Proxy proxy) {
SocketAddress a = proxy.address();
if ( !(a instanceof InetSocketAddress) )
throw new IllegalArgumentException("Unsupported address type");
InetSocketAddress ad = (InetSocketAddress) a;
server = ad.getHostString();
port = ad.getPort();
}
@Override
protected void connect(SocketAddress endpoint, int timeout)
throws IOException
{
if (endpoint == null || !(endpoint instanceof InetSocketAddress))
throw new IllegalArgumentException("Unsupported address type");
final InetSocketAddress epoint = (InetSocketAddress)endpoint;
final String destHost = epoint.isUnresolved() ? epoint.getHostName()
: epoint.getAddress().getHostAddress();
final int destPort = epoint.getPort();
SecurityManager security = System.getSecurityManager();
if (security != null)
security.checkConnect(destHost, destPort);
// Connect to the HTTP proxy server
String urlString = "http://" + destHost + ":" + destPort;
Socket httpSocket = privilegedDoTunnel(urlString, timeout);
// Success!
external_address = epoint;
// close the original socket impl and release its descriptor
close();
// update the Sockets impl to the impl from the http Socket
AbstractPlainSocketImpl psi = (AbstractPlainSocketImpl) httpSocket.impl;
this.getSocket().impl = psi;
// best effort is made to try and reset options previously set
Set<Map.Entry<Integer,Object>> options = optionsMap.entrySet();
try {
for(Map.Entry<Integer,Object> entry : options) {
psi.setOption(entry.getKey(), entry.getValue());
}
} catch (IOException x) { /* gulp! */ }
}
@Override
public void setOption(int opt, Object val) throws SocketException {
super.setOption(opt, val);
if (external_address != null)
return; // we're connected, just return
// store options so that they can be re-applied to the impl after connect
optionsMap.put(opt, val);
}
private Socket privilegedDoTunnel(final String urlString,
final int timeout)
throws IOException
{
try {
return java.security.AccessController.doPrivileged(
new java.security.PrivilegedExceptionAction<Socket>() {
public Socket run() throws IOException {
return doTunnel(urlString, timeout);
}
});
} catch (java.security.PrivilegedActionException pae) {
throw (IOException) pae.getException();
}
}
private Socket doTunnel(String urlString, int connectTimeout)
throws IOException
{
Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress(server, port));
URL destURL = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) destURL.openConnection(proxy);
conn.setConnectTimeout(connectTimeout);
conn.setReadTimeout(this.timeout);
conn.connect();
doTunneling(conn);
try {
Object httpClient = httpField.get(conn);
return (Socket) serverSocketField.get(httpClient);
} catch (IllegalAccessException x) {
throw new InternalError("Should not reach here", x);
}
}
private void doTunneling(HttpURLConnection conn) {
try {
doTunneling.invoke(conn);
} catch (ReflectiveOperationException x) {
throw new InternalError("Should not reach here", x);
}
}
@Override
protected InetAddress getInetAddress() {
if (external_address != null)
return external_address.getAddress();
else
return super.getInetAddress();
}
@Override
protected int getPort() {
if (external_address != null)
return external_address.getPort();
else
return super.getPort();
}
@Override
protected int getLocalPort() {
if (socket != null)
return super.getLocalPort();
if (external_address != null)
return external_address.getPort();
else
return super.getLocalPort();
}
}