Hello!
If this happens after some time of inactivity, setting keep-alive should help.
Some firewalls, like checkpoint, drop inactive connections after some idle time.
(Got no jsch at hands to look for the exact syntax, but I believe something
like
channel.setKeepAlive(true);
should do - maybe it's the session though).
If it happens on an active connection, I have no Idea, but the stack trace could
shed some more light.
Regards,
Heiner
Professor Flávio Brito wrote:
>
> Hi
>
> Congratulations for your work with jcraft.scp library. We are using
> your jcraft library. After 2 months with success sending files to
> our server, we are receiving a message "java.io.IOException: broken
> channel".
> We cleaned our firewall without success, but when we try it outside
> our network it's OK. Can you help us?
>
> Thanks
>
> Flávio Brito
> Rio de Janeiro - Brazil
>
> Our code
> /*
> * ScpToFtp.java
> *
> * Created on 19 de Abril de 2007, 14:46
> *
> * To change this template, choose Tools | Template Manager
> * and open the template in the editor.
> */
>
> package utils;
>
> import com.jcraft.jsch.*;
> import java.awt.Container;
> import java.awt.GridBagConstraints;
> import java.awt.GridBagLayout;
> import java.awt.Insets;
> import java.io.File;
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.io.InputStream;
> import java.io.OutputStream;
> import javax.swing.JLabel;
> import javax.swing.JOptionPane;
> import javax.swing.JPanel;
> import javax.swing.JPasswordField;
> import javax.swing.JTextField;
>
>
> /**
> *
> * @author renan
> */
> public class ScpToFtp {
> String senha=null;
>
>
> /** Creates a new instance of ScpToFtp */
> public ScpToFtp(String fileNome,String usuario, String
> passwd,String hostSsh,String portaSsh ,String fileNome2) throws
> JSchException, IOException {
>
>
> FileInputStream fis=null;
>
>
> String lfile=fileNome;
> String user=usuario;
> senha = passwd;
> String host=hostSsh;
> String rfile=fileNome2;
>
> JSch jsch=new JSch();
> Session session=jsch.getSession(user, host, 8155);
>
> // username and password will be given via UserInfo
> interface.
> UserInfo ui=new MyUserInfo();
> session.setUserInfo(ui);
> session.connect();
>
> // exec 'scp -t rfile' remotely
> String command="scp -p -t "+rfile;
> Channel channel=session.openChannel("exec");
> ((ChannelExec)channel).setCommand(command);
>
> // get I/O streams for remote scp
> OutputStream out=channel.getOutputStream();
> InputStream in=channel.getInputStream();
>
> channel.connect();
>
>
> // send "C0644 filesize filename", where filename should
> not include '/'
> long filesize=(new File(lfile)).length();
> command="C0644 "+filesize+" ";
> if(lfile.lastIndexOf('/')>0){
> command+=lfile.substring(lfile.lastIndexOf('/')+1);
> } else{
> command+=lfile;
> }
> command+="\n";
> out.write(command.getBytes());
> out.flush();
>
> // send a content of lfile - manadan o arquivo
> fis=new FileInputStream(lfile);
>
> byte[] buf=new byte[1024];
> int nLidos;
> while((nLidos = fis.read(buf))>=0){
> out.write(buf,0,nLidos);
> }
>
> /* while(true){
> int len=fis.read(buf, 0, buf.length);
> if(len<=0) break;
> out.write(buf, 0, len); //out.flush();
>
> }*/
> fis.close();
> fis=null;
> // send '\0'
> buf[0]=0;
> out.write(buf, 0, 1);
> out.flush();
> out.close();
> channel.disconnect();
> session.disconnect();
>
>
> if(fis!=null)
> fis.close();
>
>
> }
>
> static int checkAck(InputStream in) throws Exception{
> int b=in.read();
> // b may be 0 for success,
> // 1 for error,
> // 2 for fatal error,
> // -1
> if(b==0) return b;
> if(b==-1) return b;
>
> if(b==1 || b==2){
> StringBuffer sb=new StringBuffer();
> int c;
> do {
> c=in.read();
> sb.append((char)c);
> }
> while(c!='\n');
> if(b==1){ // error
> System.out.print(sb.toString());
> }
> if(b==2){ // fatal error
> System.out.print(sb.toString());
> }
> }
> return b;
> }
>
> public class MyUserInfo implements UserInfo, UIKeyboardInteractive{
>
> public String getPassphrase() {
> return null;
> }
>
> public String getPassword() {
> return senha;
> }
>
> public boolean promptPassword(String string) {
> return true;
> }
>
> public boolean promptPassphrase(String string) {
> return true;
> }
>
> public boolean promptYesNo(String string) {
> return true;
> }
>
> public void showMessage(String string) {
> }
>
> public String[] promptKeyboardInteractive(String string,
> String string0, String string1, String[] prompt, boolean[] b) {
> String[] response=new String[prompt.length];
> for(int i=0; i<prompt.length; i++){
> response[i]=senha;
> }
> return response;
>
> }
>
> }
>
> }
>
>
>
>
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