void ReceiveFileChunksFromServer() throws Exception, ClassNotFoundException {
try {
if (flagFilename) {
filename = (String) in.readObject();
totalChunks = Integer.parseInt((String) in.readObject());
flagFilename = false;
}
if (availableChunks == null) availableChunks = new File[totalChunks];
if (requiredChunks == null) requiredChunks = new File[totalChunks];
int partNumber = Integer.parseInt((String) in.readObject());
File partFile = new File("chunks/" + filename + "." + partNumber);
byte[] msg = (byte[]) in.readObject();
Files.write(partFile.toPath(), msg);
availableChunks[partNumber] = partFile;
System.out.println("Received chunk " + partNumber);
} catch (ClassNotFoundException e) {
flag = true;
} catch (Exception e) {
flag = true;
}
}
private void setOwnership(File dir, String group, String owner) {
try {
Path path = dir.toPath();
UserPrincipalLookupService lookupService =
FileSystems.getDefault().getUserPrincipalLookupService();
GroupPrincipal groupPrincipal = lookupService.lookupPrincipalByGroupName(group);
UserPrincipal userPrincipal = lookupService.lookupPrincipalByName(owner);
PosixFileAttributeView pfav =
Files.getFileAttributeView(path, PosixFileAttributeView.class, LinkOption.NOFOLLOW_LINKS);
pfav.setGroup(groupPrincipal);
pfav.setOwner(userPrincipal);
} catch (Exception ex) {
cp.appendln("Unable to set the file group and owner for\n " + dir);
}
}
void ReceiveFileChunkFromNeighbor() throws Exception, ClassNotFoundException {
try {
int chunkNum = Integer.parseInt((String) inDown.readObject());
if (chunkNum == -1) return;
byte[] msg = (byte[]) inDown.readObject();
File chunkFile = new File("chunks/" + filename + "." + chunkNum);
Files.write(chunkFile.toPath(), msg);
availableChunks[chunkNum] = chunkFile;
System.out.println("Received chunk " + chunkNum + " from Client " + dwldNeighbor);
} catch (ClassNotFoundException e) {
flag = true;
} catch (Exception e) {
flag = true;
}
}
public static void main(String[] args) throws Exception {
ServerSocket Server = new ServerSocket(8080);
String clientInput;
File file;
Path filePath;
byte[] fileArray;
while (true) {
// Accepts a connection to a socket.
// Program waits at this line until a connection is made.
Socket connectedSocket = Server.accept();
BufferedReader inFromClient =
new BufferedReader(new InputStreamReader(connectedSocket.getInputStream()));
DataOutputStream outToClient = new DataOutputStream(connectedSocket.getOutputStream());
clientInput = inFromClient.readLine();
file = new File(clientInput);
filePath = file.toPath();
fileArray = Files.readAllBytes(filePath);
outToClient.write(fileArray);
connectedSocket.close();
}
}