graph_svg.php

vnstat_php_frontend汉化版 vnstat是linux下一个很好用的流量检测工具

<?php
    require 'config.php';
    require 'vnstat.php';

    function svg_create($width, $height)
    {
	header('Content-type: image/svg+xml');
	print "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n";
	print "<svg width=\"$width\" height=\"$height\" version=\"1.2\" baseProfile=\"tiny\" xmlns=\"http://www.w3.org/2000/svg\">\n";
	print "<g style=\"shape-rendering: crispEdges\">\n";
    }

    function svg_end()
    {
	print "</g>\n";
	print "</svg>\n";
    }

    function svg_options($options)
    {
	foreach ($options as $key => $value) {
	    print "$key=\"$value\" ";
	}
    }

    function svg_group($options)
    {
	print "<g ";
	svg_options($options);
	print ">\n";
    }

    function svg_group_end()
    {
	print "</g>\n";
    }

    function svg_text($x, $y, $text, $options = array()) 
    {	
	print "<text x=\"$x\" y=\"$y\" ";
	svg_options($options);
	print ">$text</text>\n";
    }

    function svg_line($x1, $y1, $x2, $y2, $options = array())
    {
	print "<line x1=\"$x1\" y1=\"$y1\" x2=\"$x2\" y2=\"$y2\" ";
	svg_options($options);
	print "/>\n";
    }

    function svg_rect($x, $y, $w, $h, $options = array()) 
    {
	print "<rect x=\"$x\" y=\"$y\" width=\"$w\" height=\"$h\" ";
	svg_options($options);
	print "/>\n";
    }

    function svg_poly($points, $options = array())
    {
       print "<polygon points=\"";
       for ($p = 0; $p < count($points); $p += 2) {
	  print $points[$p].','.$points[$p+1].' ';
       }
       svg_options($options);
       print "\"/>\n";
    }

    function allocate_color($colors)
    {
	$col['rgb'] = sprintf("#%02X%02X%02X", $colors[0], $colors[1], $colors[2]);
	$col['opacity'] = (127 - $colors[3]) / 127;
	return $col;
    }
            
    function init_image()
    {
        global $xlm, $xrm, $ytm, $ybm, $iw, $ih,$graph, $cl, $iface, $colorscheme, $style, $iface_title;

        if ($graph == 'none')
            return;

        //
        // image object
        //    
        $xlm = 70;
        $xrm = 20;
        $ytm = 35;
        $ybm = 60;
        if ($graph == 'small')
        {
            $iw = 300 + $xrm + $xlm;
            $ih = 100 + $ytm + $ybm;    
        }
        else
        {
            $iw = 600 + $xrm + $xlm;
            $ih = 200 + $ytm + $ybm;
        }
	
	svg_create($iw, $ih);

        //
        // colors
        //
	$cs = $colorscheme[$style];
	$cl['image_background'] = allocate_color($cs['image_background']);
	$cl['background'] = allocate_color($cs['graph_background']);
	$cl['background_2'] = allocate_color($cs['graph_background_2']);
        $cl['grid_stipple_1'] = allocate_color($cs['grid_stipple_1']);
        $cl['grid_stipple_2'] = allocate_color($cs['grid_stipple_2']);
        $cl['text'] = allocate_color($cs['text']);
        $cl['border'] = allocate_color($cs['border']);
        $cl['rx'] = allocate_color($cs['rx']);
        $cl['rx_border'] = allocate_color($cs['rx_border']);
        $cl['tx'] = allocate_color($cs['tx']);
        $cl['tx_border'] = allocate_color($cs['tx_border']);
	
        svg_rect(0, 0, $iw, $ih, array( 'stroke' => 'none', 'stroke-width' => 0, 'fill' => $cl['image_background']['rgb']) );
	svg_rect($xlm, $ytm, $iw-$xrm-$xlm, $ih-$ybm-$ytm, array( 'stroke' => 'none', 'stroke-width' => 0, 'fill' => $cl['background']['rgb']) );
	
	$depth = 12;
	svg_group( array( 'stroke' => 'none', 'stroke-width' => 0, 'fill' => $cl['background_2']['rgb'], 'fill-opacity' => $cl['background_2']['opacity']) );
	svg_poly(array($xlm, $ytm, $xlm, $ih - $ybm, $xlm - $depth, $ih - $ybm + $depth, $xlm - $depth, $ytm + $depth));
	svg_poly(array($xlm, $ih - $ybm, $xlm - $depth, $ih - $ybm + $depth, $iw - $xrm - $depth, $ih - $ybm  + $depth, $iw - $xrm, $ih - $ybm));
	svg_group_end();

	// draw title
	$text="$iface_title[$iface]($iface) 鎺ュ彛鐨勬祦閲忕ず鎰忓浘";
	svg_text($iw / 2, ($ytm / 2), $text, array( 'stroke' => $cl['text'], 'stroke-width' => 0, 'font-family' => 'Simhei', 'font-weight' => 'bold', 'text-anchor' => 'middle' ));
    }

    function draw_border()
    {
        global $cl, $iw, $ih;
	svg_rect(1, 1, $iw-2, $ih-2, array( 'stroke' => $cl['border']['rgb'], 'stroke-opacity' => $cl['border']['opacity'], 'stroke-width' => 1, 'fill' => 'none') );
    }
    
    function draw_grid($x_ticks, $y_ticks)
    {
        global $cl, $iw, $ih, $xlm, $xrm, $ytm, $ybm;
        $x_step = ($iw - $xlm - $xrm) / $x_ticks;
        $y_step = ($ih - $ytm - $ybm) / $y_ticks;
	
	$depth = 12;

	svg_group( array( 'stroke' => $cl['grid_stipple_1']['rgb'], 'stroke-opacity' => $cl['grid_stipple_1']['opacity'], 'stroke-width' => '1px', 'stroke-dasharray' => '1,1' ) );
        for ($i = $xlm; $i <= ($iw - $xrm); $i += $x_step)
        {
	    svg_line($i, $ytm, $i, $ih-$ybm);
            svg_line($i, $ih-$ybm, $i-$depth, $ih-$ybm+$depth);
        }
        for ($i = $ytm; $i <= ($ih - $ybm); $i += $y_step)
        {
            svg_line($xlm, $i, $iw - $xrm, $i); 
	    svg_line($xlm, $i, $xlm - $depth, $i + $depth);
        }
	svg_group_end();

	svg_group( array( 'stroke' => $cl['border']['rgb'], 'stroke-width' => '1px', 'stroke-opacity' => $cl['border']['opacity'] ) );
        svg_line($xlm, $ytm, $xlm, $ih - $ybm);
        svg_line($xlm, $ih - $ybm, $iw - $xrm, $ih - $ybm);
	svg_group_end();
    }
    
    
    function draw_data($data)
    {
        global $cl,$iw,$ih,$xlm,$xrm,$ytm,$ybm;

        sort($data);

        $x_ticks = count($data);
        $y_ticks = 10;
        $y_scale = 1;
        $prescale = 1;
        $unit = 'K';
        $offset = 0;
        $gr_h = $ih - $ytm - $ybm;
        $x_step = ($iw - $xlm - $xrm) / $x_ticks;
        $y_step = ($ih - $ytm - $ybm) / $y_ticks;
        $bar_w = ($x_step / 2) ;

        //
        // determine scale
        //
        $low = 99999999999;
        $high = 0;
        for ($i=0; $i<$x_ticks; $i++)
        {
            if ($data[$i]['rx'] < $low)
            $low = $data[$i]['rx'];
            if ($data[$i]['tx'] < $low)
            $low = $data[$i]['tx'];
            if ($data[$i]['rx'] > $high)
            $high = $data[$i]['rx'];
            if ($data[$i]['tx'] > $high)
            $high = $data[$i]['tx'];
        }

        while ($high > ($prescale * $y_scale * $y_ticks))
        {
            $y_scale = $y_scale * 2;
            if ($y_scale >= 1024)
            {
            $prescale = $prescale * 1024;
            $y_scale = $y_scale / 1024;
            if ($unit == 'K') 
                $unit = 'M';
            else if ($unit == 'M')
                $unit = 'G';
            else if ($unit == 'G')
                $unit = 'T';
            }
        }

        draw_grid($x_ticks, $y_ticks);
	
        //
        // graph scale factor (per pixel)
        //
        $sf = ($prescale * $y_scale * $y_ticks) / $gr_h;

        if ($data[0] == 'nodata')
        {
            $text = '娌℃湁鍙