readline() and process !
please see the code below :
publicstaticvoid main(String argsp[])throws IOException,InterruptedException{
Runtime r=Runtime.getRuntime();
Process p=null;
try{
p=r.exec("lftp xxx.xxx.xxx.xxx");
}catch(Exception e){
System.out.println("Error executing lftp");
}
PrintWriter out1 =new PrintWriter(new OutputStreamWriter(p.getOutputStream()));
BufferedReader in1 =new BufferedReader(new InputStreamReader(p.getInputStream()));
String buff="";
String cmd="ls";
out1.println(cmd);
out1.flush();
while((buff=in1.readLine())!=null)// the while will loop forever !
{
System.out.println(buff);
}
}
the code output the correct information ,then the readline block and the while won't jump out.how can I solve it ?
please help !
[1627 byte] By [
jbbskill] at [2007-9-30 20:06:12]
FTP doesn't close the socket, so there is no end of file, so readLine() doesn't return null.
"ls"'s output seems to be ended by a line like "226 10 matches total". "226" is the response status code. Add to the while loop:
if (buff.startsWith("226 ")) // There is a space after the status code
break;
I wonder what happens if the directory contains a file named "226 bottles of beer on the wall.txt". You may want to experiment.
If you want to write a more robust ftp thingie, check out what other response codes are possible, and deal with each one. Google for the FTP RFC.
I added it ,but it doesn't work.
by the way , "ls" 's output isn't ended by a line like "226 ..".
the output is just some files and directories !
all I want to know is how to get the output if the application doesn't close !
or use another method to obtain the output of the inputStream of the process ?
