I ran in to many ssh2 stream problems as well.
Problem 1.
One problem I think related to the openssl version I was using.
I was using the standard version with Fedora Core 3. ssh connected actions
sometimes worked and sometimes did not work.
I recompiled the ssh2.so with the following versions.
libssh2-0.8
openssl-0.9.7g
ssh2-0.7
Problem 2.
At this point file transfers worked great. However, running commands and
reading the stream was having problems.
Using the classic
?
| while (!feof($ssh_stream)) {
$contents .= fread($||ssh_stream||, 5120);
}
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I found that I never got any responses.
After testing I found that my $||ssh_stream always had a true response
to feof($||ssh_stream||)|;
And that fread($ssh_stream,5120) did not always bring back data.
While the following is not a Correction to the problem, it does allow
you to read the incoming stream
and know when it is done computing. This is the function I use which is
in side a remoteConnection
class I have wrapping the different ssh2 functions. If somebody comes up
with a CORRECTIOIN to
the problem rather than a work around, I would surely appreciate it.
Here is my work around with comments. Hope it helps.
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function command ($command) {
// attach echo '__end_cmd_response__'; to the end of any
command run.
// this will be the last thing in the streams output so I
can identify when my command
// has finished.
$stream = ssh2_exec($this-conn, $command .\necho
'__end_cmd_response__'; );
if ($stream) {
// not fully sure why I do this. but it does not seem to
hurt. The stream has no data
// right away.
sleep(5);
// turning blocking off allows stream to keep moving
eventhough no data is coming
// through it. Required to make the time out work correctly.
socket_set_blocking($stream,false);
// the time out is set less than the php time out.
Otherwise you run the risk of the
// php timing out if the stream hangs.
stream_set_timeout($stream,25);
$start = mktime();
// manual indicator to exit the while
$exit = false;
while ($exit == false) {
$read .= fread($stream,5120);
// this pulls meta data from the stram so we can
test for the time out.
$info = stream_get_meta_data($stream);
// test for the echo'ed __end_cmd_response__
if (ereg(__end_cmd_response__,$read)) {
$exit = true;
break;
// check to see if the stream has timed out.
} elseif ($info[timed_out]) {
// i just add this to tell the user that the
stream timed out.
$read .= iExited stream reading (25 seconds).
Check changes online./i\n;
$exit = true;
break;
}
}
fclose($stream);
return $read;
}
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Oscar Gosdinski wrote:
Hello everybody:
I need my PHP application connects through SSH to other server for
getting some info to display and i tried the following code to test
lib ssh2:
$server = ...;
$user = ...;
$passwd = ...;
$con = ssh2_connect($server, 22);
if (ssh2_auth_password($con, $user, $passwd)) {
$s = ssh2_exec($con, 'ls -l');
$file = fopen(/tmp/test, w);
while ($line = stream_get_line($s, 1024)) {
fwrite($file, $line);
fflush($file);
}
fclose($file);
} else {
echo Authentication Error;
}
The file /tmp/test was created but it does not have any data. I can
connect to the server using a normal ssh session in my laptop and the
'ls -l' command returns me information.
I think that i installed correctly the ssh2 functions because if a put
an incorrect password i get the Authentication Error message.
I searched the web for info about similar problems and no results.
Please, anyone can help me with this problem because i have been
spending three days with this.
Thanks in advance for your answers.
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