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author
quaa
committed
Server receiving comms from client?
1 parent 0b27cdb commit 8a9ac3c

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2 files changed

+205
-6
lines changed

2 files changed

+205
-6
lines changed

‎pseudocode.txt‎

Lines changed: 79 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -25,3 +25,82 @@ if does not exist
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do nothing
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move to next file
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end
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2 way talking:
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CLIENT: dirName
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Server: exists = TRUE or FALSE
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if directory
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CLIENT: dirName
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SERVER: true
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CLIENT: isDirectory = TRUE
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SERVER: true
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CLIENT: PATH
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SERVER: true
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else
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CLIENT: fileName
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SERVER: true
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CLIENT: isDirectory = FALSE
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SERVER: true
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CLIENT: PATH
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SERVER: true
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CLIENT: lastModified
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SERVER: TRUE or FALSE (update?)
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if TRUE
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CLIENT: SEND FILE
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SERVER: TRUE
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else if FALSE
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CLIENT: TRUE
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SERVER: SEND FILE
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CLIENT: TRUE
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SERVER: SEND LAST MODIFIED
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end
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end
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CLIENT: DIR..
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SERVER: OK
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CLIENT: DONE
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if EXISTS = TRUE
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if directory
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SERVER: dirName DiR
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CLIENT: TRUE or FALSE
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if FALSE
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SERVER: TRUE
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CLIENT: ask user if he/she would like to delete servers copy
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reply Y (delete) or N (get servers copy)
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or D (do nothing)
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if Y
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SERVER: delete directory
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if N
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CLIENT: make directory
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if D
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do nothing
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end
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end
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else if TRUE
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SERVER: fileName
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CLIENT: TRUE or FALSE
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if TRUE
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SERVER: TRUE
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CLIENT: ask user if he/she would like to delete servers copy
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reply Y (delete) or N (get servers copy)
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or D (do nothing)
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if Y
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SERVER: delete file
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if N
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SERVER: SEND FILE
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CLIENT: OK
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SERVER: SEND LASTMODIFIED
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CLIENT: OK
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if D
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do nothing
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end
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end
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end
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end
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SERVER: DONE

‎src/net/quaa/jfs/Server.java‎

Lines changed: 126 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,12 +1,20 @@
11
package net.quaa.jfs;
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3+
import java.io.BufferedInputStream;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.InputStream;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.OutputStream;
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import java.net.ServerSocket;
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import java.net.Socket;
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public class Server {
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private int PORT_NUMBER;
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private static final String DONE = "DONE";
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public Server(int port) {
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PORT_NUMBER = port;
@@ -25,9 +33,90 @@ public void startServer() throws Exception {
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File fBaseDir = new File(baseDir);
2735

28-
if(fBaseDir.exists() && fBaseDir.isDirectory()){
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Boolean baseDirExists = fBaseDir.exists();
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if(!baseDirExists)
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fBaseDir.mkdir();
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ObjectOutputStream oos = new ObjectOutputStream(sock.getOutputStream());
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oos.writeBoolean(new Boolean(baseDirExists));
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oos.flush();
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Boolean isClientDone = false;
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while (!isClientDone) {
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String fName = (String) ois.readObject();
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if(fName.equals(DONE)) { // check if we are done
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isClientDone = true;
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break;
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}
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oos.writeBoolean(new Boolean(true));
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oos.flush();
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Boolean isDirectory = ois.readBoolean();
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if(isDirectory) {
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oos.writeBoolean(new Boolean(true));
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oos.flush();
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String path = (String) ois.readObject();
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File newDir = new File(baseDir, path);
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if (!newDir.exists())
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newDir.mkdir();
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oos.writeBoolean(new Boolean(true));
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oos.flush();
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} else {
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oos.writeBoolean(new Boolean(true));
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oos.flush();
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String path = (String) ois.readObject();
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oos.writeBoolean(new Boolean(true));
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oos.flush();
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Long lastModified = ois.readLong();
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File newFile = new File(baseDir, path);
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Boolean updateFromClient = !newFile.exists() && (newFile.lastModified() <= lastModified);
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if(updateFromClient) { // If true receive file from client
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newFile.delete();
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oos.writeBoolean(new Boolean(updateFromClient));
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oos.flush();
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receiveFile(newFile, sock);
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newFile.setLastModified(lastModified);
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oos.writeBoolean(new Boolean(true));
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} else { // if false send file to client
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oos.writeBoolean(new Boolean(updateFromClient));
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oos.flush();
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ois.readBoolean();
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sendFile(newFile, sock);
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ois.readBoolean();
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oos.writeLong(new Long(newFile.lastModified()));
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oos.flush();
109+
}
110+
}
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}
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if(baseDirExists){
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}
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/* if(baseDirExists)
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System.out.println(baseDir + " is a directory and exists!");
30-
/* System.out.print("Sending file '" + fileName + "' to: " + sock.getInetAddress() + "...");
119+
System.out.print("Sending file '" + fileName + "' to: " + sock.getInetAddress() + "...");
31120
ObjectOutputStream oos = new ObjectOutputStream(sock.getOutputStream());
32121
oos.writeObject("1");
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byte[] mybytearray = new byte[(int) f.length()];
@@ -36,15 +125,46 @@ public void startServer() throws Exception {
36125
OutputStream os = sock.getOutputStream();
37126
os.write(mybytearray, 0, mybytearray.length);
38127
os.flush();
39-
System.out.println(" DONE!");
40-
*/ }else{
128+
System.out.println(" DONE!");
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}else{
41130
System.out.println(baseDir + " Exists?: " + fBaseDir.exists() + " IsDirectory?: " + fBaseDir.isDirectory());
42-
/* System.out.println(sock.getInetAddress() + " requested " + fileName + ", but it does not exist!");
131+
System.out.println(sock.getInetAddress() + " requested " + fileName + ", but it does not exist!");
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ObjectOutputStream oos = new ObjectOutputStream(sock.getOutputStream());
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oos.writeObject("0");
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oos.flush();
46-
*/ }
135+
} */
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oos.close();
137+
ois.close();
47138
sock.close();
48139
}
49140
}
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public static void sendFile(File dir, Socket sock) throws Exception {
143+
byte[] mybytearray = new byte[(int) dir.length()];
144+
BufferedInputStream bis = new BufferedInputStream(new FileInputStream(dir));
145+
bis.read(mybytearray, 0, mybytearray.length);
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OutputStream os = sock.getOutputStream();
147+
os.write(mybytearray, 0, mybytearray.length);
148+
os.flush();
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os.close();
151+
bis.close();
152+
}
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public static void receiveFile(File dir, Socket sock) throws Exception {
155+
byte[] mybytearray = new byte[1024]; // receive file from server
156+
InputStream is = sock.getInputStream();
157+
FileOutputStream fos = new FileOutputStream(dir);
158+
BufferedOutputStream bos = new BufferedOutputStream(fos);
159+
int bytesRead = 0;
160+
int current = 0;
161+
while((bytesRead = is.read(mybytearray, 0, mybytearray.length)) != -1){
162+
bos.write(mybytearray, 0, bytesRead);
163+
current = current + bytesRead;
164+
}
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166+
bos.close();
167+
fos.close();
168+
is.close();
169+
}
50170
}

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