Subversion-Projekte lars-tiefland.ci

<?php
/**
 * This file is part of the exporting module for Highcharts JS.
 * www.highcharts.com/license
 * 
 *  
 * Available POST variables:
 *
 * $filename  string   The desired filename without extension
 * $type      string   The MIME type for export. 
 * $width     int      The pixel width of the exported raster image. The height is calculated.
 * $svg       string   The SVG source code to convert.
 */


// Options
define ('BATIK_PATH', 'batik-rasterizer.jar');

///////////////////////////////////////////////////////////////////////////////
ini_set('magic_quotes_gpc', 'off');

$type = $_POST['type'];
$svg = (string) $_POST['svg'];
$filename = (string) $_POST['filename'];

// prepare variables
if (!$filename or !preg_match('/^[A-Za-z0-9\-_ ]+$/', $filename)) {
        $filename = 'chart';
}
if (get_magic_quotes_gpc()) {
        $svg = stripslashes($svg);      
}

// check for malicious attack in SVG
if(strpos($svg,"<!ENTITY") !== false || strpos($svg,"<!DOCTYPE") !== false){
        exit("Execution is stopped, the posted SVG could contain code for a malicious attack");
}

$tempName = md5(rand());

// allow no other than predefined types
if ($type == 'image/png') {
        $typeString = '-m image/png';
        $ext = 'png';
        
} elseif ($type == 'image/jpeg') {
        $typeString = '-m image/jpeg';
        $ext = 'jpg';

} elseif ($type == 'application/pdf') {
        $typeString = '-m application/pdf';
        $ext = 'pdf';

} elseif ($type == 'image/svg+xml') {
        $ext = 'svg';

} else { // prevent fallthrough from global variables
        $ext = 'txt';
}

$outfile = "temp/$tempName.$ext";

if (isset($typeString)) {
        
        // size
        $width = '';
        if ($_POST['width']) {
                $width = (int)$_POST['width'];
                if ($width) $width = "-w $width";
        }

        // generate the temporary file
        if (!file_put_contents("temp/$tempName.svg", $svg)) { 
                die("Couldn't create temporary file. Check that the directory permissions for
                        the /temp directory are set to 777.");
        }
        
        // Troubleshooting snippet
        /*
        $command = "/Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/bin/java -jar ". BATIK_PATH ." $typeString -d $outfile $width temp/$tempName.svg 2>&1"; 
        $output = shell_exec($command);
        echo "<pre>Command: $command <br>";
        echo "Output: $output</pre>";
        die;
        // */

        // Do the conversion
        $output = shell_exec("java -jar ". BATIK_PATH ." $typeString -d $outfile $width temp/$tempName.svg");
        
        // catch error
        if (!is_file($outfile) || filesize($outfile) < 10) {
                echo "<pre>$output</pre>";
                echo "Error while converting SVG. ";
                
                if (strpos($output, 'SVGConverter.error.while.rasterizing.file') !== false) {
                        echo "
                        <h4>Debug steps</h4>
                        <ol>
                        <li>Copy the SVG:<br/><textarea rows=5>" . htmlentities(str_replace('>', ">\n", $svg)) . "</textarea></li>
                        <li>Go to <a href='http://validator.w3.org/#validate_by_input' target='_blank'>validator.w3.org/#validate_by_input</a></li>
                        <li>Paste the SVG</li>
                        <li>Click More Options and select SVG 1.1 for Use Doctype</li>
                        <li>Click the Check button</li>
                        </ol>";
                }
        } 
        
        // stream it
        else {
                header("Content-Disposition: attachment; filename=\"$filename.$ext\"");
                header("Content-Type: $type");
                echo file_get_contents($outfile);
        }
        
        // delete it
        unlink("temp/$tempName.svg");
        unlink($outfile);

// SVG can be streamed directly back
} else if ($ext == 'svg') {
        header("Content-Disposition: attachment; filename=\"$filename.$ext\"");
        header("Content-Type: $type");
        echo $svg;
        
} else {
        echo "Invalid type";
}
?>