Hi
I am using libssh2_channel_write and libssh2_channel_read to communicate with a
server that accepts commands.
The server returns tab and newline delimited data.
I'm facing a problem where the returned data is not always in the same format
for the same command.
e.g. It will have some extra tabs or newlines and sometimes a backspace \x08
etc.
Because, the data is tab and newline delimited, it is impossible to adjust and
fix the read data.
As far as I can see.
- The results are random.
- The first read is always good.
- Only occurs to large data returned. E.g. 20k
- Sometimes it will go wrong on the second time the command was sent,
or sometimes on the 17th repeat etc.
I'm certain that this is not a server problem.
I am in the process of porting a released to production application from C# to
Ubuntu GCC, and this problem never occurred.
Anyone had such issues?
Here's a snip of the read function.
string SSHManager::ReadResponse(LIBSSH2_CHANNEL *channel)
{
string r = "";
try
{
int bufSize = 8192;
ssize_t readBytes;
//keep reading until terminator is received. \nt\n
while (true)
{
//new the char array every loop.
char *buffer = new char[bufSize];
//keep reading
readBytes = libssh2_channel_read(channel, buffer, bufSize);
if (readBytes < 1)
return r;
else if (readBytes == 0)
return "Error. Socket Closed"; //socket closed.
if(readBytes < bufSize)
buffer[readBytes+1] = '\0';
r.append(buffer);
delete[] buffer;
if (r.length() > 2)
{
if(r.find("\nt\n") != string::npos)
break; //terminator received
}
}
}
catch (int e)
{
ERRORP("An exception occurred. Exception Number %d", e);
}
return r;
}
Thanks and Best regards,
Ty
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