Networking Java Solutions Homework Unfortunately this is not present in every response

Document Type
Homework Help
Book Title
Computer Networking: A Top-Down Approach 6th Edition
Authors
James F. Kurose, Keith W. Ross
Solution for the Proxy Cache Lab
The following is one solution for the proxy cache lab. It contains code for all the three
classes in the lab.
ProxyCache.java
/**
* ProxyCache.java - Simple caching proxy
*
public static void init(int p) {
port = p;
try {
socket = new ServerSocket(port);
} catch (IOException e) {
try {
BufferedReader fromClient =
new BufferedReader(new
InputStreamReader(client.getInputStream()));
System.out.println("Reading request...");
new DataOutputStream(server.getOutputStream());
toServer.writeBytes(request.toString());
} catch (UnknownHostException e) {
System.out.println("Unknown host: " + request.getHost());
System.out.println(e);
//response = new HttpResponse(is);
DataOutputStream toClient =
new DataOutputStream(client.getOutputStream());
toClient.writeBytes(response.toString());
toClient.write(response.body);
myPort = Integer.parseInt(args[0]);
} catch (ArrayIndexOutOfBoundsException e) {
System.out.println("Need port number as argument");
System.exit(-1);
} catch (NumberFormatException e) {
handle(client);
//ProxyCacheThread request = new ProxyCacheThread(client);
//request.run();
} catch (IOException e) {
System.out.println("Error reading request from client: " + e);
/* Definitely cannot continue, so skip to next
* iteration of while loop. */
continue;
}
}
}
}
HttpRequest.java
/**
* HttpRequest - HTTP request container and parser
*/
import java.io.*;
import java.net.*;
import java.util.*;
public class HttpRequest {
/** Help variables */
final static String CRLF = "\r\n";
final static int HTTP_PORT = 80;
/** Store the request parameters */
String method;
firstLine = from.readLine();
} catch (IOException e) {
System.out.println("Error reading request line: " + e);
}
String[] tmp = firstLine.split(" ");
method = tmp[0];
* contact in case the request URI is not complete. */
if (line.startsWith("Host:")) {
tmp = line.split(" ");
if (tmp[1].indexOf(':') > 0) {
String[] tmp2 = tmp[1].split(":");
port);
}
/** Return host for which this request is intended */
public String getHost() {
return host;
}
/** Return port for server */
return req;
}
}
HttpResponse.java
/**
* HttpResponse - Handle HTTP replies
*
* $Id: HttpResponse.java,v 1.3 2004/02/16 15:21:46 kangasha Exp $
*
*/
import java.io.*;
String version;
int status;
String statusLine = "";
String headers = "";
/* Body of reply */
/* First read status line and response headers */
try {
String line = fromServer.readLine();
while (line.length() != 0) {
if (!gotStatusLine) {
}
length = Integer.parseInt(tmp[1]);
}
line = fromServer.readLine();
}
} catch (IOException e) {
System.out.println("Error reading headers from server: " + e);
return;
}
* than BUF_SIZE. The while-loop ends when either we have
* read Content-Length bytes or when the connection is
* closed (when there is no Connection-Length in the
* response. */
while (bytesRead < length || loop) {
body[bytesRead + i] = buf[i];
}
bytesRead += res;
}
} catch (IOException e) {
System.out.println("Error reading response body: " + e);
return;
}
}
/**
}
}

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