Mega Code Archive
Reading Web Pages, with Socket Channels
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import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.SocketChannel;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
public class GetWebPageDemo {
public static void main(String args[]) throws Exception {
String resource, host, file;
int slashPos;
resource = "www.rntsoft.com/index.htm";
slashPos = resource.indexOf('/'); // find host/file separator
if (slashPos < 0) {
resource = resource + "/";
slashPos = resource.indexOf('/');
}
file = resource.substring(slashPos); // isolate host and file parts
host = resource.substring(0, slashPos);
System.out.println("Host to contact: '" + host + "'");
System.out.println("File to fetch : '" + file + "'");
SocketChannel channel = null;
try {
Charset charset = Charset.forName("ISO-8859-1");
CharsetDecoder decoder = charset.newDecoder();
CharsetEncoder encoder = charset.newEncoder();
ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
CharBuffer charBuffer = CharBuffer.allocate(1024);
InetSocketAddress socketAddress = new InetSocketAddress(host, 80);
channel = SocketChannel.open();
channel.connect(socketAddress);
String request = "GET " + file + " \r\n\r\n";
channel.write(encoder.encode(CharBuffer.wrap(request)));
while ((channel.read(buffer)) != -1) {
buffer.flip();
decoder.decode(buffer, charBuffer, false);
charBuffer.flip();
System.out.println(charBuffer);
buffer.clear();
charBuffer.clear();
}
} catch (UnknownHostException e) {
System.err.println(e);
} catch (IOException e) {
System.err.println(e);
} finally {
if (channel != null) {
try {
channel.close();
} catch (IOException ignored) {
}
}
}
System.out.println("\nDone.");
}
}
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