FIFO Client PHP Example
A sample implementation of a FIFO client in PHP you can integrate it in your web applications.
<head>
<title>OpenSER FIFO Client</title>
</head>
<body>
<table border="1">
<tr><th colspan="2">OpenSER FIFO Client</th></tr>
<form action="<?php echo $_SERVER['SCRIPT_NAME']; ?>" method="POST">
<tr>
<td><textarea name="cmd" cols=40 rows=6></textarea></td>
<td><input type="submit" name="action" value="Send"></td>
</tr>
</form>
<tr align="center">
<td colspan="2">
<font size="-1">Please do not enter the leading ":" or the trailing ":REPLY_FILE_NAME"</font>
</td>
</tr>
</table>
<?php
$cmd = NULL;
if (isset($_POST['cmd'])) {
$cmd = $_POST['cmd'];
}
if (isset($_POST['action']) && ($_POST['action'] == "Send") && (trim(strlen($_POST['cmd'])) > 0)) {
$host="192.168.1.1"; # IP Address of the OpenSER (FIFO) Server
$port = 12345; # Port that OpenSER (FIFO) is listening on
$pos = strpos($cmd,"\n");
if ($pos == NULL) {
$fifo_cmd = ":$cmd:REPLY_FILE_NAME\n";
} else {
$t1 = substr($cmd,0,$pos-1);
$t2 = substr($cmd,$pos);
$fifo_cmd = ":$t1:REPLY_FILE_NAME$t2\n";
}
$timeout = 5;
$fp = fsockopen ($host, $port, $errno, $errstr, $timeout);
if (!$fp) {
die("Error opening socket: $errno $errstr");
} else {
echo "<br>FIFO Command: <b><pre>$fifo_cmd</pre></b><br>";
// write the user string to the socket
fputs ($fp, $fifo_cmd);
// get the result
while ($result = fgets ($fp, 1024)) {
echo "Response: <b>$result</b><br>";
}
// close the connection
fclose ($fp);
}
}
?>
</body>
</html>
Here is another example using the function write2fifo taken from serweb. It should work as it with a default openser installation. This script comes with no warranty… Type which to list all available commands.
<?php
/* This script has part of it taken from "serweb".
serweb talks to SER via FIFO -- this is FIFO's name,
it must have the same value as SER's fifo config param
*/
$config->fifo_server="/tmp/openser_fifo";
/* values used for names of reply fifos -- they change randomly
this values shouldn't be changed unless you well know what are
you doing
*/
$config->reply_fifo_filename="openserwebfifo_".rand();
$config->reply_fifo_path="/tmp/".$config->reply_fifo_filename;
/* This function is taken from "serweb" */
function write2fifo($fifo_cmd, &$errors, &$status){
global $config;
/* check if fifo is running */
if (!file_exists($config->fifo_server) or
filetype($config->fifo_server)!="fifo"){
/*log_errors(PEAR::raiseError("FIFO not running or bad path to it", NULL, NULL,
NULL, "fifo path:".$config->fifo_server), $errors);*/
echo "FIFO not running or bad path to it";
return false;
}
/* open fifo now */
$fifo_handle=fopen( $config->fifo_server, "w" );
if (!$fifo_handle) {
$errors[]="sorry -- cannot open write fifo"; return false;
}
/* create fifo for replies */
@system("mkfifo -m 666 ".$config->reply_fifo_path );
/* add command separator */
$fifo_cmd=$fifo_cmd."\n";
/* write fifo command */
if (fwrite( $fifo_handle, $fifo_cmd)==-1) {
@unlink($config->reply_fifo_path);
@fclose($fifo_handle);
$errors[]="sorry -- fifo writing error"; return false;
}
@fclose($fifo_handle);
/* read output now */
@$fp = fopen( $config->reply_fifo_path, "r");
if (!$fp) {
@unlink($config->reply_fifo_path);
$errors[]="sorry -- reply fifo opening error"; return false;
}
$status=fgets($fp,256);
if (!$status) {
@unlink($config->reply_fifo_path);
$errors[]="sorry -- reply fifo reading error"; return false;
}
$rd="";
while (!feof($fp)) {
$rd.=fread($fp,8192);
}
@unlink($config->reply_fifo_path);
return $rd;
}
?>
<html>
<head>
<title>OpenSER FIFO Client</title>
</head>
<body>
<table border="1">
<tr><th colspan="2">OpenSER FIFO Client</th></tr>
<form action="<?php echo $_SERVER['SCRIPT_NAME']; ?>" method="POST">
<tr>
<td><textarea name="cmd" cols=40 rows=6></textarea></td>
<td><input type="submit" name="action" value="Send"></td>
</tr>
</form>
<tr align="center">
<td colspan="2">
<font size="-1">Please do not enter the leading ":" or the trailing ":REPLY_FILE_NAME"</font>
</td>
</tr>
</table>
<?php
$cmd = NULL;
if (isset($_POST['cmd'])) {
$cmd = $_POST['cmd'];
}
if (isset($_POST['action']) && ($_POST['action'] == "Send") && (trim(strlen($_POST['cmd'])) > 0)) {
$pos = strpos($cmd,"\n");
if ($pos == NULL) {
$fifo_cmd = ":$cmd:".$config->reply_fifo_filename."\n";
} else {
$t1 = substr($cmd,0,$pos-1);
$t2 = substr($cmd,$pos);
$fifo_cmd = ":$t1:".$config->reply_fifo_filename."$t2\n";
}
$fifo_out=write2fifo($fifo_cmd, $err, $status);
if ($err) {
$errors=array_merge($errors, $err);
echo "Error 1: $errors";
die();
}
if (substr($status,0,1)!="2" and substr($status,0,3)!="404") {
$errors[]=$status;
echo "Error 2: $status";
die();
}
echo "<br>FIFO Command: <b><pre>$fifo_cmd</pre></b><br>";
echo "Response: <b>$fifo_out</b><br>";
}
?>
</body>
</html>
