[英]Unable to get response from a command (using JSch)
我正在尝试通过ssh发送的命令获得响应。 我使用JSch lib连接。 建立了连接,但是发送的命令没有响应。
public void openSSH(
String username,
String password,
String hostname,
int port) throws Exception {
JSch jsch = new JSch();
Session session = jsch.getSession(username, hostname, 22);
this.session = session;
session.setPassword(password);
// Avoid asking for key confirmation
Properties prop = new Properties();
prop.put("StrictHostKeyChecking", "no");
session.setConfig(prop);
session.connect();
}
public String runCommand(String command) throws Exception {
// SSH Channel
ChannelExec channelssh = (ChannelExec) session.openChannel("exec");
ByteArrayOutputStream baos = new ByteArrayOutputStream();
InputStream in = channelssh.getInputStream();
channelssh.setOutputStream(baos);
// Execute command
channelssh.setCommand(command);
channelssh.connect();
System.out.println("Unix system connected...");
byte[] tmp = new byte[1024];
while (true){
while (in.available() > 0) {
Log.v("running", "line"); // won't work
int i = in.read(tmp, 0, 1024);
if (i < 0) {
break;
}
String line = new String(tmp, 0, i);
System.out.println("Unix system console output: " +line);
channelssh.disconnect();
}
}
}
private class AsyncTaskOne extends AsyncTask<Void, Void, Boolean> {
@Override
protected Boolean doInBackground(Void... params) {
try {
openSSH("login", "pass", "10.10.10.80", 22 );
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return true;
}
protected void onPostExecute(Boolean value) {
if (value) {
try {
runCommand("ls -llh");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
请检查您的inputStream是否实际可用。据我了解,问题是您的inputStream没有给您任何东西,而不是
InputStream in = channelssh.getInputStream();
// channelssh.setOutputStream(baos);
评论这一行,看看这里是否确实有东西。 另外,如何确定已连接? 设置命令的正确方法是这样,因此请执行以下操作:
Channel channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command);
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