modifiedclient.txt

Icarnegie university SSD8电子书和全部练习答案

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//200532580182 pengxu 

import java.io.*; 
import java.net.*; 

public class ModifiedClient { 
//the client socket used to connect to server 
private Socket clientSocket; 
//read the user input from keyboard 
BufferedReader inFromKeyBoard; 
//get the information response by the server 
BufferedReader inFromServer; 
//send the user input to the sever 
DataOutputStream outToServer; 
public ModifiedClient(){ 

this.clientSocket=null; 
} 

//connect to the server 
public void connect(String host,int port){ 
try{ 
this.clientSocket=new Socket(host,port); 
//read from keyboard 
this.inFromKeyBoard=new BufferedReader 
(new InputStreamReader(System.in)); 
//read from the client socket 
this.inFromServer=new BufferedReader 
(new InputStreamReader(clientSocket.getInputStream())); 
//output to server socket 
this.outToServer=new DataOutputStream 
(clientSocket.getOutputStream() ); 
}catch(Exception e){ 
e.printStackTrace(); 
} 
} 
public void close(){ 
try{ 
//close the socket 
this.clientSocket.close(); 
}catch(Exception e){ 
e.printStackTrace(); 
} 
} 

public static void main(String [] args) throws Exception{ 
if(args.length!=1){ 
System.out.println("Usage: Client <server>"); 
System.exit(0); 
} 
else{ 
try{ 
double sendBytes; 
double recieveBytes; 
final int port=80; 
ModifiedClient client=new ModifiedClient(); 
//connnect to the user defined host(argv[0]) use port 80 
client.connect(args[0], port); 
System.out.println(args[0] + " is listening to you request:"); 
//read the user input from keyboard assign to s 
String s=client.inFromKeyBoard.readLine(); 
s+="\r\n" + "\r\n"; 

//send s to server 
client.outToServer.writeBytes(s); 
//get the sendBytes 
sendBytes=s.length(); 
//get the response header and show to the user 
String file=""; 
String temp=file; 
int i=0; 
boolean flag=true; 
for(int j=0; flag&amt;&amt;((j=client.inFromServer.read())!=-1);){ 
switch(j) 
{ 
case 13: // '\r' 
break; 

case 10: // '\n' 
if(j == i) 
{ 
flag = false; 
} else 
{ 
i = j; 
file+="\r\n"; 
} 
break; 

default: 
i = j; 
file+=(char)j; 
break; 
} 
} 
System.out.println("Header:"); 
System.out.println(""); 
System.out.println(file); 
//get the recieveBytes 
recieveBytes=file.length(); 
file=""; 
temp=client.inFromServer.readLine(); 
//get the response context 
while(temp!=null){ 

file=file + "\r\n"+temp; 
temp=client.inFromServer.readLine(); 
} 
// save the response text to a file 
System.out.println("Enter the name of the file to save: "); 
String name=client.inFromKeyBoard.readLine(); 
FileOutputStream filename=new FileOutputStream(name); 
filename.write(file.getBytes()); 
recieveBytes+=file.length(); 
System.out.println("Send bytes: "+sendBytes); 
System.out.println("recieve bytes: "+recieveBytes); 
filename.flush(); 
filename.close(); 
client.close(); 
}catch(Exception e) 
{ 
e.printStackTrace(); 
} 
} 
} 
}