Lunchbox4K/gnuplot.php

## gnuplot.php
<?php
/**
* MP-Works PHP Gnuplot Tool
*
* @author Mitchell Pell <pell.mitchell@gmail.com>
* @copyright (c) 2016 Mitchell Pell - https://www.mp-works.us
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*/

//# Variables
//------------------------------------------------------------

$page_content   = ''; /*! Web Page Content */
$page_title     = 'PHP Gnuplot Grapher '; /*! Web Page Title */
$img_path       = ''; /*! Path to generated gnuplot image. */
$script_path    = ''; /*! Path to created gnuplot script. */
$script         = ''; /*! Current gnuplot script. */
$outputstr      = ''; /*! Output from exec call. */
$output         = ''; /*!  */


//# Load Form Data from POST
//------------------------------------------------------------

//If the page being loaded was from a POST REQUEST_METHOD (meaning form information was submitted.)
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    //generate random string
    $temp_name_hash = bin2hex(mcrypt_create_iv(22, MCRYPT_DEV_URANDOM));
    //create the script and image paths for saving to based on the random string.
    $script_path = './gnuplots/plot_' . $temp_name_hash     . '.ps';
    $img_path    = './gnuplots/plot_' . $temp_name_hashpath . '.png';
    //try to fetch the gnuplot_script textarea contents from the page form.
    //*to-to* sanitize, and validate the information sent in from the textarea.
    $script = $_POST["gnuplot_script"];
    //search for and remove 'noinvert', because it was causing gnuplot to throw an error.
    //*to-do* look into fix to allow 'noinvert'.
    $script = str_replace('noinvert','',$script);
    //Save the script to a file (.ps) and execuse gnuplot on success.
    if ( file_put_contents($script_path, $script) ){
        try{
            $outputstr .= exec('gnuplot '.$script_path.' > '.$img_path, $output);
        }catch(\Exception $e){
            $outputstr .= $e->getMessage();
        }
    //If the script file could not be written.
    }else{
        //Unable to write
        $page_content .='<P><font color="red">ERROR: Unable to write script file!</font>';
    }
}//End of $_SERVER["REQUEST_METHOD"] == "POST"

//# Load temp script if none was passed with POST
if (strlen($script) == 0){
    $script = file_get_contents('gnuplots/3d-surface-01.ps');
}//End of form data loading from POST


//# HTML Page Header
//------------------------------------------------------------

$page_content .='
<!--| c 2016 Mitchell Pell |-->
<!DOCTYPE html><html lang="en">
    <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- Styles -->
    <link rel="stylesheet" href="https://bootswatch.com/darkly/bootstrap.min.css">
	<link href="mpw_engine/tp/jq-linedtext/jquery-linedtextarea.css" type="text/css" rel="stylesheet" />

    <!-- Scripts -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
    <!-- @see http://alan.blog-city.com/jquerylinedtextarea.htm -->
	<script src="mpw_engine/tp/jq-linedtext/jquery-linedtextarea.js"></script>

    <!-- DISABLED <script src="mpw_engine/tp/codepress/codepress.js" type="text/javascript"></script> -->

        <title>'.$page_title.'</title>
    </head>';

//# HTML Page Body
//------------------------------------------------------------

//# HTML Page Body - Bootstrap panel for body w/ title
$page_content .='
    <body>
        <div class="container">
            <div class="panel panel-default">
                <div class="panel-heading">
                    <h3>'.$page_title.'</h3>
                </div>
                <div class="panel-body">
                <a href="http://gnuplot.sourceforge.net/demo_5.0/", target="_blank">More Gnuplot Scripts at Sourceforge.</a>';

//# HTML Page Body - Form
$page_content .= '
<hr>
<tag autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
<form action="gnuplot.php" method="POST" role="form" class="form-horizontal">
    <div class="form-group">
        <label for="gnuplot_script">Gnuplot Script</label>
        <textarea class="lined" id="gnuplot_script" name="gnuplot_script" rows="24" cols="120">
'.$script.'
        </textarea>
    </div>
    <button type="submit" class="btn btn-primary">Submit</button>
</form>';

//# HTML Page Body - Form Errors
$page_content .= '
<!-- <div class="alert alert-danger">
  <strong>Error!</strong> '.$outputstr.'
</div> -->';

//# HTML Page Body - lined textarea script (enables the lined textarea in the form)
// @see http://alan.blog-city.com/jquerylinedtextarea.htm
$page_content .= '
<script>
$(function() {
  // Target all classed with ".lined"
  $(".lined").linedtextarea(
    {selectedLine: 1}
  );
  // Target a single one
  $("#mytextarea").linedtextarea();
});
</script>';

//# HTML Page Body - Link to directory with saved plots
$page_content .= '
<br>
<a href="./gnuplots/" target="_blank">Previous Plots</a>
<hr>';

//# HTML Page Body - Generated image
$page_content .= '
<img class="img-responsive" src="'.$img_path.'" alt="Gnuplot Results Image">
';

//# HTML Page Body - End of bootstrap panel for body
$page_content .= '
                </div>
            </div>
            <sub>Powered by MP-Works Engine (a0.01)
            <br><span class="glyphicon glyphicon-copyright-mark"></span>
            2016 Mitchell Pell</sub>
        </div>
';

//# HTML Page Body - End of page body,
$page_content .='
        <a name="bottomOfPage"></a>
        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
        <script>
            window.scrollTo(0,document.body.scrollHeight);
        </script>
    </body>
</html> ';


//# Finally, Print the pages contents.
print($page_content);

?>

## gph.sh
#!/bin/bash
# ----------------------------------------------------------
# Gnuplot Helper
# Script for Generating a Gnuplot Image (.png)
# from a Gnuplot Script (.ps)

# Only allow the script to be run by the user gnuplot
if [ "$USER" != "gnuplot" ]
  then echo "error a"
  exit
# Check for proper number of arguments.
elif [ "$#" -ne 2 ]
then echo "error b"
  exit
fi
# Execute
gnuplot "$1" > "$2"
	<?php
	/**
	* MP-Works PHP Gnuplot Tool
	*
	* @author Mitchell Pell <pell.mitchell@gmail.com>
	* @copyright (c) 2016 Mitchell Pell - https://www.mp-works.us
	* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
	*/

	//# Variables
	//------------------------------------------------------------

	$page_content = ''; /! Web Page Content /
	$page_title = 'PHP Gnuplot Grapher '; /! Web Page Title /
	$img_path = ''; /! Path to generated gnuplot image. /
	$script_path = ''; /! Path to created gnuplot script. /
	$script = ''; /! Current gnuplot script. /
	$outputstr = ''; /! Output from exec call. /
	$output = ''; /! /


	//# Load Form Data from POST
	//------------------------------------------------------------

	//If the page being loaded was from a POST REQUEST_METHOD (meaning form information was submitted.)
	if ($_SERVER["REQUEST_METHOD"] == "POST") {
	//generate random string
	$temp_name_hash = bin2hex(mcrypt_create_iv(22, MCRYPT_DEV_URANDOM));
	//create the script and image paths for saving to based on the random string.
	$script_path = './gnuplots/plot_' . $temp_name_hash . '.ps';
	$img_path = './gnuplots/plot_' . $temp_name_hashpath . '.png';
	//try to fetch the gnuplot_script textarea contents from the page form.
	//to-to sanitize, and validate the information sent in from the textarea.
	$script = $_POST["gnuplot_script"];
	//search for and remove 'noinvert', because it was causing gnuplot to throw an error.
	//to-do look into fix to allow 'noinvert'.
	$script = str_replace('noinvert','',$script);
	//Save the script to a file (.ps) and execuse gnuplot on success.
	if ( file_put_contents($script_path, $script) ){
	try{
	$outputstr .= exec('gnuplot '.$script_path.' > '.$img_path, $output);
	}catch(\Exception $e){
	$outputstr .= $e->getMessage();
	}
	//If the script file could not be written.
	}else{
	//Unable to write
	$page_content .='<P><font color="red">ERROR: Unable to write script file!</font>';
	}
	}//End of $_SERVER["REQUEST_METHOD"] == "POST"

	//# Load temp script if none was passed with POST
	if (strlen($script) == 0){
	$script = file_get_contents('gnuplots/3d-surface-01.ps');
	}//End of form data loading from POST


	//# HTML Page Header
	//------------------------------------------------------------

	$page_content .='
	<!--\| c 2016 Mitchell Pell \|-->
	<!DOCTYPE html><html lang="en">
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">

	<!-- Styles -->
	<link rel="stylesheet" href="https://bootswatch.com/darkly/bootstrap.min.css">
	<link href="mpw_engine/tp/jq-linedtext/jquery-linedtextarea.css" type="text/css" rel="stylesheet" />

	<!-- Scripts -->
	<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
	<!-- @see http://alan.blog-city.com/jquerylinedtextarea.htm -->
	<script src="mpw_engine/tp/jq-linedtext/jquery-linedtextarea.js"></script>

	<!-- DISABLED <script src="mpw_engine/tp/codepress/codepress.js" type="text/javascript"></script> -->

	<title>'.$page_title.'</title>
	</head>';

	//# HTML Page Body
	//------------------------------------------------------------

	//# HTML Page Body - Bootstrap panel for body w/ title
	$page_content .='
	<body>
	<div class="container">
	<div class="panel panel-default">
	<div class="panel-heading">
	<h3>'.$page_title.'</h3>
	</div>
	<div class="panel-body">
	<a href="http://gnuplot.sourceforge.net/demo_5.0/", target="_blank">More Gnuplot Scripts at Sourceforge.</a>';

	//# HTML Page Body - Form
	$page_content .= '
	<hr>
	<tag autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
	<form action="gnuplot.php" method="POST" role="form" class="form-horizontal">
	<div class="form-group">
	<label for="gnuplot_script">Gnuplot Script</label>
	<textarea class="lined" id="gnuplot_script" name="gnuplot_script" rows="24" cols="120">
	'.$script.'
	</textarea>
	</div>
	<button type="submit" class="btn btn-primary">Submit</button>
	</form>';

	//# HTML Page Body - Form Errors
	$page_content .= '
	<!-- <div class="alert alert-danger">
	<strong>Error!</strong> '.$outputstr.'
	</div> -->';

	//# HTML Page Body - lined textarea script (enables the lined textarea in the form)
	// @see http://alan.blog-city.com/jquerylinedtextarea.htm
	$page_content .= '
	<script>
	$(function() {
	// Target all classed with ".lined"
	$(".lined").linedtextarea(
	{selectedLine: 1}
	);
	// Target a single one
	$("#mytextarea").linedtextarea();
	});
	</script>';

	//# HTML Page Body - Link to directory with saved plots
	$page_content .= '
	<br>
	<a href="./gnuplots/" target="_blank">Previous Plots</a>
	<hr>';

	//# HTML Page Body - Generated image
	$page_content .= '
	<img class="img-responsive" src="'.$img_path.'" alt="Gnuplot Results Image">
	';

	//# HTML Page Body - End of bootstrap panel for body
	$page_content .= '
	</div>
	</div>
	<sub>Powered by MP-Works Engine (a0.01)
	<br><span class="glyphicon glyphicon-copyright-mark"></span>
	2016 Mitchell Pell</sub>
	</div>
	';

	//# HTML Page Body - End of page body,
	$page_content .='
	<a name="bottomOfPage"></a>
	<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
	<script>
	window.scrollTo(0,document.body.scrollHeight);
	</script>
	</body>
	</html> ';


	//# Finally, Print the pages contents.
	print($page_content);

	?>
	#!/bin/bash
	# ----------------------------------------------------------
	# Gnuplot Helper
	# Script for Generating a Gnuplot Image (.png)
	# from a Gnuplot Script (.ps)

	# Only allow the script to be run by the user gnuplot
	if [ "$USER" != "gnuplot" ]
	then echo "error a"
	exit
	# Check for proper number of arguments.
	elif [ "$#" -ne 2 ]
	then echo "error b"
	exit
	fi
	# Execute
	gnuplot "$1" > "$2"