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Lunchbox4K/gnuplot.php

Last active November 29, 2016 01:46
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PHP Gnuplot Grapher
Raw
gnuplot.php
<?php
/**
* MP-Works PHP Gnuplot Tool
*
* @author Mitchell Pell <[email protected]>
* @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);
?>
Raw
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"
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