jodd-http/src/main/java/jodd/http/net/Socks4ProxySocketFactory.java
private Socket createSocks4ProxySocket(final String host, final int port) {
		Socket socket = null;
		final String proxyHost = proxy.getProxyAddress();
		final int proxyPort = proxy.getProxyPort();
		final String user = proxy.getProxyUsername();

		try {
			socket = Sockets.connect(proxyHost, proxyPort, connectionTimeout);

			final InputStream in = socket.getInputStream();
			final OutputStream out = socket.getOutputStream();

			socket.setTcpNoDelay(true);

			byte[] buf = new byte[1024];

			// 1) CONNECT

			int index = 0;
			buf[index++] = 4;
			buf[index++] = 1;

			buf[index++] = (byte) (port >>> 8);
			buf[index++] = (byte) (port & 0xff);

			InetAddress addr = InetAddress.getByName(host);
			byte[] byteAddress = addr.getAddress();
			for (byte byteAddres : byteAddress) {
				buf[index++] = byteAddres;
			}

			if (user != null) {
				System.arraycopy(user.getBytes(), 0, buf, index, user.length());
				index += user.length();
			}
			buf[index++] = 0;
			out.write(buf, 0, index);

			// 2) RESPONSE

			int len = 6;
			int s = 0;
			while (s < len) {
				int i = in.read(buf, s, len - s);
				if (i <= 0) {
					throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "stream is closed");
				}
				s += i;
			}
			if (buf[0] != 0) {
				throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "proxy returned VN " + buf[0]);
			}
			if (buf[1] != 90) {
				try {
					socket.close();
				} catch (Exception ignore) {
				}
				throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "proxy returned CD " + buf[1]);
			}

			byte[] temp = new byte[2];
			in.read(temp, 0, 2);

			return socket;
		} catch (RuntimeException rtex) {
			closeSocket(socket);
			throw rtex;
		} catch (Exception ex) {
			closeSocket(socket);
			throw new HttpException(ProxyInfo.ProxyType.SOCKS4, ex.toString(), ex);
		}
	}
private Socket createSocks4ProxySocket(final String host, final int port) {
		Socket socket = null;
		final String proxyHost = proxy.getProxyAddress();
		final int proxyPort = proxy.getProxyPort();
		final String user = proxy.getProxyUsername();

		try {
			socket = Sockets.connect(proxyHost, proxyPort, connectionTimeout);

			final InputStream in = socket.getInputStream();
			final OutputStream out = socket.getOutputStream();

			socket.setTcpNoDelay(true);

			byte[] buf = new byte[1024];

			// 1) CONNECT

			int index = 0;
			buf[index++] = 4;
			buf[index++] = 1;

			buf[index++] = (byte) (port >>> 8);
			buf[index++] = (byte) (port & 0xff);

			InetAddress addr = InetAddress.getByName(host);
			byte[] byteAddress = addr.getAddress();
			for (byte byteAddres : byteAddress) {
				buf[index++] = byteAddres;
			}

			if (user != null) {
				System.arraycopy(user.getBytes(), 0, buf, index, user.length());
				index += user.length();
			}
			buf[index++] = 0;
			out.write(buf, 0, index);

			// 2) RESPONSE

			int len = 6;
			int s = 0;
			while (s < len) {
				int i = in.read(buf, s, len - s);
				if (i <= 0) {
					throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "stream is closed");
				}
				s += i;
			}
			if (buf[0] != 0) {
				throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "proxy returned VN " + buf[0]);
			}
			if (buf[1] != 90) {
				try {
					socket.close();
				} catch (Exception ignore) {
				}
				throw new HttpException(ProxyInfo.ProxyType.SOCKS4, "proxy returned CD " + buf[1]);
			}

			byte[] temp = new byte[2];
			in.read(temp, 0, 2);

			return socket;
		} catch (RuntimeException rtex) {
			closeSocket(socket);
			throw rtex;
		} catch (Exception ex) {
			closeSocket(socket);
			throw new HttpException(ProxyInfo.ProxyType.SOCKS4, ex.toString(), ex);
		}
	}
private Socket createSocks4ProxySocket ( final String host , final int port ) { Socket socket = null ; final String proxyHost = proxy . getProxyAddress ( ) ; final int proxyPort = proxy . getProxyPort ( ) ; final String user = proxy . getProxyUsername ( ) ; try { socket = Sockets . connect ( proxyHost , proxyPort , connectionTimeout ) ; final InputStream in = socket . getInputStream ( ) ; final OutputStream out = socket . getOutputStream ( ) ; socket . setTcpNoDelay ( true ) ; byte [ ] buf = new byte [ 1024 ] ; // 1) CONNECT int index = 0 ; buf [ index ++ ] = 4 ; buf [ index ++ ] = 1 ; buf [ index ++ ] = ( byte ) ( port >>> 8 ) ; buf [ index ++ ] = ( byte ) ( port & 0xff ) ; InetAddress addr = InetAddress . getByName ( host ) ; byte [ ] byteAddress = addr . getAddress ( ) ; for ( byte byteAddres : byteAddress ) { buf [ index ++ ] = byteAddres ; } if ( user != null ) { System . arraycopy ( user . getBytes ( ) , 0 , buf , index , user . length ( ) ) ; index += user . length ( ) ; } buf [ index ++ ] = 0 ; out . write ( buf , 0 , index ) ; // 2) RESPONSE int len = 6 ; int s = 0 ; while ( s < len ) { int i = in . read ( buf , s , len - s ) ; if ( i <= 0 ) { throw new HttpException ( ProxyInfo . ProxyType . SOCKS4 , "stream is closed" ) ; } s += i ; } if ( buf [ 0 ] != 0 ) { throw new HttpException ( ProxyInfo . ProxyType . SOCKS4 , "proxy returned VN " + buf [ 0 ] ) ; } if ( buf [ 1 ] != 90 ) { try { socket . close ( ) ; } catch ( Exception ignore ) { } throw new HttpException ( ProxyInfo . ProxyType . SOCKS4 , "proxy returned CD " + buf [ 1 ] ) ; } byte [ ] temp = new byte [ 2 ] ; in . read ( temp , 0 , 2 ) ; return socket ; } catch ( RuntimeException rtex ) { closeSocket ( socket ) ; throw rtex ; } catch ( Exception ex ) { closeSocket ( socket ) ; throw new HttpException ( ProxyInfo . ProxyType . SOCKS4 , ex . toString ( ) , ex ) ; } }
Connects to the SOCKS4 proxy and returns proxified socket.
Connects to the SOCKS4 proxy and returns proxified socket .