चूंकि मेरे सभी वीएलसी के साथ "sftp: //" लिंक के साथ सीधे स्ट्रीम करने का प्रयास विफल हो गया था, मैं एक छोटा सा जावा प्रोग्राम लिखने में कामयाब रहा, जो फ़ाइल को डाउनलोड करके और रिमोट फ़ाइल के आकार की जांच करके मुझे हमेशा वही करने की ज़रूरत थी जो मैं चाहता था यदि आवश्यक हो तो डाउनलोड फिर से शुरू करने के लिए बदल गया है।
यहाँ कुंजी कोड का टुकड़ा है:
sftpChannel.get(remotePath, outstream, monitor, ChannelSftp.OVERWRITE, 0);
long localSize;
Thread.sleep(1000);
while(sftpChannel.lstat(remotePath).getSize() > (localSize = new File(localPath).length())){
sftpChannel.get(remotePath, outstream, monitor, ChannelSftp.RESUME, localSize);
Thread.sleep(timeToWaitBeforeUpdatingFile);
}
System.out.println("The download is finished.");
अगर कोई दिलचस्पी रखता है तो मैं कार्यक्रम के लिए पूरा कोड भी पोस्ट कर रहा हूं:
package streamer;
import java.io.Console;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Arrays;
import java.util.InputMismatchException;
import java.util.Scanner;
import java.util.Vector;
import com.jcraft.jsch.ChannelSftp;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.Session;
import com.jcraft.jsch.SftpException;
import com.jcraft.jsch.SftpProgressMonitor;
public class Streamer {
public static void main(String[] args) throws InterruptedException, IOException {
JSch jsch = new JSch();
if(args.length != 7){
System.out.println("Incorrect parameters:");
System.out.println("Streamer user host port privateKeyPath remotePath localPath vlcPath");
System.exit(-1);
}
String user = args[0];
String host = args[1];
int port = -1;
try {
port = Integer.parseInt(args[2]);
} catch (NumberFormatException e3) {
System.out.println("Port must be an integer");
System.exit(-1);
}
String privateKeyPath = args[3];
String remotePath = args[4];
String localPath = args[5];
String vlcPath = args[6];
int timeToWaitBeforeUpdatingFile = 5000;
String password = "";
Console console = System.console();
if (console == null) {
System.out.println("Couldn't get Console instance");
//password = "";
System.exit(-1);
}else{
char passwordArray[] = console.readPassword("Enter your password: ");
password = new String(passwordArray);
Arrays.fill(passwordArray, ' ');
}
try {
jsch.addIdentity(privateKeyPath, password);
} catch (JSchException e) {
System.out.println(e.getMessage());
System.out.println("Invalid private key file");
System.exit(-1);
}
Session session;
try {
session = jsch.getSession(user, host, port);
java.util.Properties config = new java.util.Properties();
config.put("StrictHostKeyChecking", "no");
session.setConfig(config);
System.out.println("Establishing connection...");
session.connect();
System.out.println("Connection established.");
System.out.println("Creating SFTP Channel...");
ChannelSftp sftpChannel = (ChannelSftp) session.openChannel("sftp");
sftpChannel.connect();
System.out.println("SFTP Channel created.");
try {
@SuppressWarnings("unchecked")
Vector<ChannelSftp.LsEntry> recordings = sftpChannel.ls(remotePath + "*.mpeg");
if(recordings.isEmpty()){
System.out.println("There are no recordings to watch.");
System.exit(0);
}
int choice = 1;
System.out.println("Chose the recording to watch:");
for (ChannelSftp.LsEntry e : recordings){
System.out.println("[" + choice++ + "] " + e.getFilename());
}
Scanner sc = new Scanner(System.in);
try {
String fileName = recordings.get(sc.nextInt() - 1).getFilename();
remotePath += fileName;
localPath += fileName;
} catch (InputMismatchException e) {
System.out.println("Incorrect choice");
System.exit(-1);
}
System.out.println("You chose : " + remotePath);
sc.close();
} catch (SftpException e2) {
System.out.println("Error during 'ls': the remote path might be wrong:");
System.out.println(e2.getMessage());
System.exit(-1);
}
OutputStream outstream = null;
try {
outstream = new FileOutputStream(new File(localPath));
} catch (FileNotFoundException e) {
System.out.println("The creation of the file" + localPath + " failed. Local path is incorrect or writing permission is denied.");
System.exit(-1);
}
try {
SftpProgressMonitor monitor = null;
System.out.println("The download has started.");
System.out.println("Opening the file in VLC...");
try {
Runtime.getRuntime().exec(vlcPath + " " + localPath);
} catch (Exception ex) {
System.out.println("The file couldn't be opened in VLC");
System.out.println("Check your VLC path.");
System.out.println(ex);
}
sftpChannel.get(remotePath, outstream, monitor, ChannelSftp.OVERWRITE, 0);
long localSize;
Thread.sleep(1000);
while(sftpChannel.lstat(remotePath).getSize() > (localSize = new File(localPath).length())){
sftpChannel.get(remotePath, outstream, monitor, ChannelSftp.RESUME, localSize);
Thread.sleep(timeToWaitBeforeUpdatingFile);
}
System.out.println("The download is finished.");
outstream.close();
System.exit(0);
} catch (SftpException e1) {
System.out.println("Error during the download:");
System.out.println(e1.getMessage());
System.exit(-1);
}
} catch (JSchException e) {
System.out.println("Connection has failed (check the user, host, port...)");
System.exit(-1);
}
}
}