Hi Lee,
I was following this thread with great interest. Is there somewhere a
description how communication is defined in pbx? What commands are used and
how are they structured? I personally don't know anything about asterisk but
I am interested in this way of communicating between two apps.
Darius
----- Original Message -----
From: "Lee Jenkins" <[EMAIL PROTECTED]>
To: <lazarus@miraclec.com>
Sent: Saturday, December 30, 2006 3:49 PM
Subject: [lazarus] Console app problems
Hi all,
I'm try to write a console application that interfaces with Asterisk PBX.
The pbx communicates with the console application over stndin and stdout.
The problem that I'm having is that when I send a command using WriteLn,
the command doesn't return as it should so I'm wonder if FP/Laz handles
stdin/stdout in some way that I am not familiar with.
Is the data written to WriteLn buffered or sent immediately? Below is a
sample of the code I am trying.
// Asterisk sends environmental vars at the start of the app
// over stdin. When it's finished it sends a blank line.
Repeat;
begin
ReadLn(sRead);
if (pos('uniqueid', sRead) >0) then
sUniqueID := sRead;
end;
until (sRead = '');
// -------------------------------------//
// Parameters Passed to app from Asterisk
// -------------------------------------//
// 1=DataToPlay, 2 = VoiceToUse
sData := paramstr(1);
sVoice := ParamStr(2);
// which voice to use? If none specified use the default
if (FileExists(sData)) then
begin
// assume it's path to a text file. Build Cmd line accordingly.
sCmd := sExePath + '/swift -f ' + sData + ' -o /tmp/' + sUniqueID +
'.wav';
sCmd := sCmd + '-p ' + sParams;
end
else
begin
// assume that we are synthesizing the actual text provided in
parameter to app
sCmd := sExePath + '/swift -o /tmp/' + sUniqueID + '.wav';
sCmd := sCmd + ' -p ' + sParams + ' "'+ sData + '"';
end;
Proc := TProcess.create(nil);
try
// Send command and write to file
Proc.CommandLine := sCmd;
Proc.Options := Proc.Options + [poWaitOnExit];
Proc.Execute;
// Write out command to play file to Asterisk over stdout
WriteLn('PLAYBACK /tmp/' + sUnique);
ReadLn(sCmd); // <===== Gets stuck here. Does not return.
// finally, delete the file
Proc.Active := false;
Proc.CommandLine := 'rm -f /tmp/' + agi.UniqueID + '.wav';
Proc.Execute;
finally;
Proc.free;
end;
Thanks,
--
Warm Regards,
Lee
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