JSP Hangs ...

[aahan]

Hi,

I've a class as under , which is getting run from a JSP. The JSP is providing the Batch File to Run :

==========================================================

public int runbat(String batchfilename) throws Exception{
Runtime rt = Runtime.getRuntime();
String cmd="E:\\myweb\\" + batchfilename;
Process proc = rt.exec(cmd);
InputStream stdin = proc.getInputStream();
InputStreamReader isr = new InputStreamReader(stdin);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<OUTPUT>");
while ( (line = br.readLine()) != null)
System.out.println(line);
System.out.println("</OUTPUT>");
int exitVal = proc.waitFor(); 
System.out.println("Process exitValue: " + exitVal);
return(exitVal); 
}

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and this is the windows batch file :
==========================================================

SET @LOGFILE="E:\myweb\SIMPLE.BAT.LOG"
ECHO. >>%@LOGFILE%
dir >>%@LOGFILE%
ECHO Commencing FTP... >>%@LOGFILE%
C:\WINNT\SYSTEM32\FTP.EXE -s:ftp_xyz.scr xyz.com >>%@LOGFILE%
ECHO .................................................>>% @LOGFILE%

==========================================================
This works fine, if I run this batch file by itself from the DOS Prompt, however , hangs if I am calling it from a JSP. This was working fine without the ftp command in the batch file from the jsp ( the dir by itself was working ok )

Any help would be appreciated.

Thanks.

 

[flumpy]

Security has probably noticed the access to the system32 dir and spazzed out on you.

It would be better to use a Java FTP implementation. Check out :

http://www.javaworld.com/javaworld/jw-04-2003/jw-0404-ftp.html#resources

Or, as this article says, you can do this {UNTESTED]:

URL url = new URL("ftp://user01:pass1234@ftp.foo.com/README.txt;type=i");
URLConnection urlc = url.openConnection();
InputStream is = urlc.getInputStream(); // To download
OutputStream os = urlc.getOutputStream(); // To upload

good luck,

Matt

 

[Diancecht]

Some tips:

1.- Test the bat itself from the command line.
2.- Make sure the command String is being properly constructed.
3.- Remember that those scripts run server side
4.- Try a different bat file
5.- Try creating a new Thread
5.- Post a more specific error: exception, where it hangs, error messages, ...

Cheers,

Dian