Бичил вэб үйлчлүүлэгч, хоёрдугаар хэсэг

Энэ удаад StringBuffer обьект ашиглан үйлчлэгчээс ирэх хариуны толгойн хэсгийг уншиж байна. Уншихдаа BufferedReader обьектийг, харин хүсэлт илгээхдээ PrintWriter-ийг ашиглажээ.

Үйлчлэгчээс ирэх хариуны биеийг хэрхэн уншиж буйг бас анхаарагтун.


package web.server;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.logging.Logger;

/**
*
* @author
*/
public class SimpleClient {
static int PORT = 1010;
static String getHeader = "GET / HTTP/1.1";
static String agentHeader ="User-Agent: Simple Client";
static String hostHeader = "host: %s: %s";

static Logger logger = Logger.getLogger("SimpleClient");

public static void main(String[] args) throws Exception {

String host = "localhost";
int port = PORT;

try {
host = args[0];
} catch (Exception e) {}

try {
port = Integer.parseInt(args[1]);
} catch (Exception e) {}

Socket socket = new Socket( host, port);
logger.info("started SimpleClient on port " + socket.getLocalPort());

BufferedReader in = new BufferedReader(
new InputStreamReader(socket.getInputStream()));

PrintWriter out = new PrintWriter(socket.getOutputStream());

// sending get request
out.println(getHeader);
out.println(String.format(hostHeader, host, port));
out.println(agentHeader);

out.println();
out.flush();

StringBuffer header = new StringBuffer("");
StringBuffer body = new StringBuffer("");
String data;
int contentLength = 0;
int pos = 0;

// get the header
while ( (data = in.readLine()) != null) {

// the header ends at the first blank line
if (data.length() == 0)
break;

header.append(data + "\n");
pos = data.toLowerCase().indexOf("content-length:");
if (pos >= 0)
contentLength = Integer.parseInt(data.substring(pos + 15).trim());
}

// get the body, if any
if (contentLength > 0) {
try {
char[] cbuf = new char[contentLength];
in.read(cbuf);
body.append(cbuf);
} catch (Exception e) {
body.append("Error: " + e);
}
} else {
body.append("No Body information retrieved. " +
"Content-Length equals zero or was not specified.");
}

// write to the console
System.out.println("HEADER:");
System.out.println(header.toString());
System.out.println("BODY: (" + contentLength + " / " + body.length() + ")");
System.out.println(body.toString());


// close all the client streams so we can listen again
out.close();
in.close();
socket.close();

logger.info("SimpleClient ended on port " + socket.getLocalPort());
}
}