r4073 minor change in UI for recent change: VST form commit on ENTER and hints on...
[racktables] / render_image.php
CommitLineData
b325120a 1<?php
e673ee24 2
21d40daa
DO
3define ('CACHE_DURATION', 604800); // 7 * 24 * 3600
4if ( // 'progressbar's never change, force cache hit before loading init.php
5 isset ($_SERVER['HTTP_IF_MODIFIED_SINCE'])
6 && $_REQUEST['img'] == 'progressbar'
7)
8{
9 $client_time = strtotime ($_SERVER['HTTP_IF_MODIFIED_SINCE']);
10 if ($client_time !== FALSE && $client_time !== -1) // readable
11 {
12 $server_time = time();
13 // not in future and not yet expired
14 if ($client_time <= $server_time && $client_time + CACHE_DURATION >= $server_time)
15 {
16 header ('Last-Modified: ' . $_SERVER['HTTP_IF_MODIFIED_SINCE'], TRUE, 304);
17 exit;
18 }
19 }
20}
90a3d6d8
DY
21
22ob_start();
23try {
e673ee24
DO
24require 'inc/init.php';
25
0cc24e9a 26assertStringArg ('img');
d15b2330
DO
27switch ($_REQUEST['img'])
28{
da958e52 29 case 'minirack': // rack security context
0cc24e9a 30 assertUIntArg ('rack_id');
da958e52 31 $pageno = 'rack';
d15b2330 32 $tabno = 'default';
da958e52
DO
33 fixContext();
34 if (!permitted())
35 renderAccessDeniedImage();
36 else
37 renderRackThumb ($_REQUEST['rack_id']);
d15b2330 38 break;
da958e52 39 case 'progressbar': // no security context
0cc24e9a 40 assertUIntArg ('done', TRUE);
21d40daa
DO
41 // 'progressbar's never change, make browser cache the result
42 header ('Cache-Control: private, max-age=' . CACHE_DURATION . ', pre-check=' . CACHE_DURATION);
43 header ('Last-Modified: ' . date (DATE_RFC1123, time()));
d15b2330
DO
44 renderProgressBarImage ($_REQUEST['done']);
45 break;
0df8c52b 46 case 'preview': // file security context
0cc24e9a 47 assertUIntArg ('file_id');
37e59768 48 $pageno = 'file';
0df8c52b 49 $tabno = 'download';
37e59768
DO
50 fixContext();
51 if (!permitted())
52 renderAccessDeniedImage();
53 else
43d0585d 54 renderFilePreview ($_REQUEST['file_id'], $_REQUEST['img']);
37e59768 55 break;
d15b2330
DO
56 default:
57 renderError();
58}
e673ee24 59
90a3d6d8
DY
60ob_end_flush();
61}
62catch (Exception $e)
63{
64 ob_end_clean();
3a089a44 65 renderError();
90a3d6d8
DY
66}
67
e673ee24
DO
68//------------------------------------------------------------------------
69function renderError ()
70{
738363f6
DO
71 // A hardcoded value is worth of saving lots of code here.
72 $img = imagecreatefrompng ('pix/error.png');
e673ee24 73 header("Content-type: image/png");
da958e52
DO
74 imagepng ($img);
75 imagedestroy ($img);
76}
77
9c0b0016 78// Having a local caching array speeds things up. A little.
e673ee24
DO
79function colorFromHex ($image, $hex)
80{
9c0b0016
DO
81 static $colorcache = array ();
82 if (isset ($colorcache[$hex]))
83 return $colorcache[$hex];
e673ee24
DO
84 $r = hexdec ('0x' . substr ($hex, 0, 2));
85 $g = hexdec ('0x' . substr ($hex, 2, 2));
86 $b = hexdec ('0x' . substr ($hex, 4, 2));
9c0b0016
DO
87 $c = imagecolorallocate ($image, $r, $g, $b);
88 $colorcache[$hex] = $c;
89 return $c;
e673ee24
DO
90}
91
92function renderRackThumb ($rack_id = 0)
35ee7bd0
DO
93{
94 // Don't call DB extra times, hence we are most probably not the
95 // only script wishing to acces the same data now.
61a1d996
DO
96 if (NULL !== ($thumbcache = loadThumbCache ($rack_id)))
97 {
98 header("Content-type: image/png");
35ee7bd0 99 echo $thumbcache;
61a1d996
DO
100 return;
101 }
102 ob_start();
103 if (FALSE !== generateMiniRack ($rack_id))
35ee7bd0 104 {
61a1d996
DO
105 $capture = ob_get_clean();
106 header("Content-type: image/png");
107 echo $capture;
35ee7bd0 108 saveThumbCache ($rack_id, $capture);
61a1d996 109 return;
35ee7bd0 110 }
61a1d996
DO
111 // error text in the buffer
112 ob_end_flush();
35ee7bd0
DO
113}
114
61a1d996
DO
115// Output a binary string containing the PNG minirack. Indicate error with return code.
116function generateMiniRack ($rack_id)
e673ee24 117{
61a1d996
DO
118 if (NULL === ($rackData = spotEntity ('rack', $rack_id)))
119 return FALSE;
120 amplifyCell ($rackData);
e673ee24 121 markupObjectProblems ($rackData);
529eac25 122 global $rtwidth;
d5157018 123 $rtdepth = 9;
e673ee24
DO
124 $offset[0] = 3;
125 $offset[1] = 3 + $rtwidth[0];
126 $offset[2] = 3 + $rtwidth[0] + $rtwidth[1];
127 $totalheight = 3 + 3 + $rackData['height'] * 2;
128 $totalwidth = $offset[2] + $rtwidth[2] + 3;
aa0e4c55
DO
129 $img = @imagecreatetruecolor ($totalwidth, $totalheight)
130 or die("Cannot Initialize new GD image stream");
9c0b0016
DO
131 // cache our palette as well
132 $color = array();
133 foreach (array ('F', 'A', 'U', 'T', 'Th', 'Tw', 'Thw') as $statecode)
d1adb55a 134 $color[$statecode] = colorFromHex ($img, getConfigVar ('color_' . $statecode));
d5157018
DO
135 $color['black'] = colorFromHex ($img, '000000');
136 $color['gray'] = colorFromHex ($img, 'c0c0c0');
137 imagerectangle ($img, 0, 0, $totalwidth - 1, $totalheight - 1, $color['black']);
138 imagerectangle ($img, 1, 1, $totalwidth - 2, $totalheight - 2, $color['gray']);
139 imagerectangle ($img, 2, 2, $totalwidth - 3, $totalheight - 3, $color['black']);
140 for ($unit_no = 1; $unit_no <= $rackData['height']; $unit_no++)
e673ee24
DO
141 {
142 for ($locidx = 0; $locidx < 3; $locidx++)
143 {
144 $colorcode = $rackData[$unit_no][$locidx]['state'];
145 if (isset ($rackData[$unit_no][$locidx]['hl']))
146 $colorcode = $colorcode . $rackData[$unit_no][$locidx]['hl'];
147 imagerectangle
148 (
149 $img,
150 $offset[$locidx],
151 3 + ($rackData['height'] - $unit_no) * 2,
152 $offset[$locidx] + $rtwidth[$locidx] - 1,
153 3 + ($rackData['height'] - $unit_no) * 2 + 1,
d1adb55a 154 $color[$colorcode]
e673ee24
DO
155 );
156 }
157 }
e673ee24
DO
158 imagepng ($img);
159 imagedestroy ($img);
61a1d996 160 return TRUE;
e673ee24
DO
161}
162
d15b2330
DO
163function renderProgressBarImage ($done)
164{
d1adb55a 165 $img = @imagecreatetruecolor (100, 10);
fec0c8da
DO
166 switch (isset ($_REQUEST['theme']) ? $_REQUEST['theme'] : 'rackspace')
167 {
168 case 'sparenetwork':
169 $color['T'] = colorFromHex ($img, '808080');
170 $color['F'] = colorFromHex ($img, 'c0c0c0');
171 break;
172 case 'rackspace': // teal
173 default:
174 $color['T'] = colorFromHex ($img, getConfigVar ('color_T'));
175 $color['F'] = colorFromHex ($img, getConfigVar ('color_F'));
176 }
d1adb55a
DO
177 imagefilledrectangle ($img, 0, 0, $done, 10, $color['T']);
178 imagefilledrectangle ($img, $done, 0, 100, 10, $color['F']);
074106cf
DO
179 for ($x = 20; $x <= 80; $x += 20)
180 {
181 $cc = $x > $done ? $color['T'] : $color['F'];
182 imagesetpixel ($img, $x, 0, $cc);
183 imagesetpixel ($img, $x, 1, $cc);
184 imagesetpixel ($img, $x, 4, $cc);
185 imagesetpixel ($img, $x, 5, $cc);
186 imagesetpixel ($img, $x, 8, $cc);
187 imagesetpixel ($img, $x, 9, $cc);
188 }
d15b2330
DO
189 header("Content-type: image/png");
190 imagepng ($img);
191 imagedestroy ($img);
d15b2330
DO
192}
193
2d75c30b
DO
194function renderAccessDeniedImage ()
195{
196 $img = @imagecreatetruecolor (1, 1);
197 imagefilledrectangle ($img, 0, 0, 1, 1, colorFromHex ($img, '000000'));
198 header("Content-type: image/png");
199 imagepng ($img);
200 imagedestroy ($img);
0df8c52b 201 die;
2d75c30b
DO
202}
203
43d0585d 204function renderFilePreview ($file_id = 0, $mode = 'view')
37e59768 205{
43d0585d 206 switch ($mode)
37e59768 207 {
43d0585d
DO
208 case 'view':
209 // GFX files can become really big, if we uncompress them in memory just to
210 // provide a PNG version of a file. To keep things working, just send the
211 // contents as is for known MIME types.
212 $file = getFile ($file_id);
213 if (!in_array ($file['type'], array ('image/jpeg', 'image/png', 'image/gif')))
214 {
215 showError ('Invalid MIME type on file', __FUNCTION__);
216 break;
217 }
218 header("Content-type: ${file['type']}");
219 echo $file['contents'];
220 break;
221 case 'preview':
d3346ce2
DO
222 if($image = getFileCache($file_id)){ //Cache Hit
223 header("Content-type: image/jpeg");
224 echo $image;
225 break;
226 }
227
228 //Cache Miss
43d0585d
DO
229 $file = getFile ($file_id);
230 $image = imagecreatefromstring ($file['contents']);
d3346ce2 231 unset ($file['contents']);
43d0585d
DO
232 $width = imagesx ($image);
233 $height = imagesy ($image);
d3346ce2 234 header ('Content-type: image/jpeg');
43d0585d
DO
235 if ($width > getConfigVar ('PREVIEW_IMAGE_MAXPXS') or $height > getConfigVar ('PREVIEW_IMAGE_MAXPXS'))
236 {
43d0585d
DO
237 $ratio = getConfigVar ('PREVIEW_IMAGE_MAXPXS') / max ($width, $height);
238 $newwidth = $width * $ratio;
239 $newheight = $height * $ratio;
240 $resampled = imagecreatetruecolor ($newwidth, $newheight);
241 imagecopyresampled ($resampled, $image, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);
242 imagedestroy ($image);
243 $image = $resampled;
d3346ce2
DO
244
245 //TODO: Find a better way to save the stream of the image... Output buffer seems silly.
246 ob_start();
247 imagejpeg ($image);
248 commitAddFileCache ($file_id, ob_get_flush());
249 imagedestroy ($image);
250 unset ($file);
43d0585d
DO
251 unset ($resampled);
252 }
43d0585d
DO
253 break;
254 default:
255 showError ('Invalid argument', __FUNCTION__);
256 break;
37e59768 257 }
37e59768 258}
f537da2f 259
e673ee24 260?>