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Update publish files
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@jeremyworboys
jeremyworboys committed Oct 28, 2014
1 parent e13859f commit ba6640a
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Showing 2 changed files with 76 additions and 22 deletions.
4 changes: 2 additions & 2 deletions publish/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@ <h1>Retina Images</h1>
<p>Automatically serve high-res images, to those who'll appreciate them.</p>
<p class=download-info>
<a href="https://github.com/Retina-Images/Retina-Images/" onClick="javascript: _gaq.push(['_trackPageview', '/GH/view']);" class="btn btn-primary btn-large">View project <span class=hidden-phone>on GitHub</span></a>
<a href="https://github.com/Retina-Images/Retina-Images/zipball/master" onClick="javascript: _gaq.push(['_trackPageview', '/GH/zipball']);" class="btn btn-large">Download <span class=hidden-phone>Retina Images</span> <small>(v1.4.0)</small></a>
<a href="https://github.com/Retina-Images/Retina-Images/zipball/master" onClick="javascript: _gaq.push(['_trackPageview', '/GH/zipball']);" class="btn btn-large">Download <span class=hidden-phone>Retina Images</span> <small>(v1.6.0)</small></a>
</p>
</div>

Expand Down Expand Up @@ -322,4 +322,4 @@ <h1><small>So Long, and </small>Thanks<small> for All the Fish</small></h1>
<script src='js/623df3b.js'></script>

</body>
</html>
</html>
94 changes: 74 additions & 20 deletions publish/retinaimages.php
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Original file line number Diff line number Diff line change
@@ -1,19 +1,25 @@
<?php

/* Version: 1.3.1 - now with better cache */
/* Version: 1.6.0 - now with more pixels */

define('DEBUG', false); // Write debugging information to a log file
define('SEND_ETAG', true); // You will want to disable this if you load balance multiple servers
define('SEND_EXPIRES', true); //
define('SEND_CACHE_CONTROL', true); //
define('CACHE_TIME', 24*60*60); // default: 1 day

$document_root = $_SERVER['DOCUMENT_ROOT'];
$requested_uri = parse_url(urldecode($_SERVER['REQUEST_URI']), PHP_URL_PATH);
$requested_file = basename($requested_uri);
$source_file = $document_root.$requested_uri;
$source_ext = strtolower(pathinfo($source_file, PATHINFO_EXTENSION));
define('SEND_EXPIRES', true);
define('SEND_CACHE_CONTROL', true);
define('USE_X_SENDFILE', false); // This will reduce memory usage, but isn't enabled on all systems. If you have issues enabling this setting, contact your host
define('DOWNSIZE_NOT_FOUND', true); // If a regular image is requested and not found, send a retina file instead?
define('CACHE_TIME', 24*60*60); // 1 day
define('DISABLE_RI_HEADER', false);

$document_root = $_SERVER['DOCUMENT_ROOT'];
$requested_uri = parse_url(urldecode($_SERVER['REQUEST_URI']), PHP_URL_PATH);
$requested_file = basename($requested_uri);
$source_file = $document_root.$requested_uri;
$source_ext = strtolower(pathinfo($source_file, PATHINFO_EXTENSION));
$at2x_file = pathinfo($source_file, PATHINFO_DIRNAME).'/'.pathinfo($source_file, PATHINFO_FILENAME).'@2x.'.pathinfo($source_file, PATHINFO_EXTENSION);
$at3x_file = pathinfo($source_file, PATHINFO_DIRNAME).'/'.pathinfo($source_file, PATHINFO_FILENAME).'@3x.'.pathinfo($source_file, PATHINFO_EXTENSION);
$cache_directive = 'must-revalidate';
$status = 'regular image';

if (DEBUG) {
$_debug_fh = fopen('retinaimages.log', 'a');
Expand All @@ -24,6 +30,8 @@
fwrite($_debug_fh, "requested_file: {$requested_file}\n");
fwrite($_debug_fh, "source_file: {$source_file}\n");
fwrite($_debug_fh, "source_ext: {$source_ext}\n");
fwrite($_debug_fh, "@2x_file: {$at2x_file}\n");
fwrite($_debug_fh, "@3x_file: {$at3x_file}\n");
}

// Image was requested
Expand All @@ -33,21 +41,62 @@
$cookie_value = false;
if (isset($_COOKIE['devicePixelRatio'])) {
$cookie_value = intval($_COOKIE['devicePixelRatio']);
}
else {
// Force revalidation of cache on next request
$cache_directive = 'no-cache';
$status = 'no cookie';
}
if (DEBUG) {
fwrite($_debug_fh, "devicePixelRatio: {$cookie_value}\n");
fwrite($_debug_fh, "cache_directive: {$cache_directive}\n");
}

// Check if DPR is high enough to warrant retina image
if (DEBUG) { fwrite($_debug_fh, "devicePixelRatio: {$cookie_value}\n"); }
if ($cookie_value !== false && $cookie_value > 1) {
// Check if DPR is high enough to warrant 3x image
if ($cookie_value !== false && $cookie_value > 2) {
// Check if retina image exists
$retina_file = pathinfo($source_file, PATHINFO_DIRNAME).'/'.pathinfo($source_file, PATHINFO_FILENAME).'@2x.'.pathinfo($source_file, PATHINFO_EXTENSION);
if (DEBUG) { fwrite($_debug_fh, "retina_file: {$retina_file}\n"); }
if (file_exists($retina_file)) {
$source_file = $retina_file;
if (file_exists($at3x_file)) {
$source_file = $at3x_file;
$status = 'retina image';
}
}
// Check if DPR is high enough to warrant 2x image
elseif ($cookie_value !== false && $cookie_value > 1) {
// Check if retina image exists
if (file_exists($at2x_file)) {
$source_file = $at2x_file;
$status = 'retina image';
}
}

// Check if we can shrink a larger version of the image
if (!file_exists($source_file) && DOWNSIZE_NOT_FOUND && ($source_file !== $at2x_file)) {
// Check if retina image exists
if (file_exists($at2x_file)) {
$source_file = $at2x_file;
$status = 'downsized image';
}
}
// Check if we can shrink a larger version of the image
elseif (!file_exists($source_file) && DOWNSIZE_NOT_FOUND && ($source_file !== $at3x_file)) {
// Check if retina image exists
if (file_exists($at3x_file)) {
$source_file = $at3x_file;
$status = 'downsized image';
}
}

// Check if the image to send exists
if (!file_exists($source_file)) {
if (DEBUG) { fwrite($_debug_fh, "Image not found. Sending 404\n"); }
header('HTTP/1.1 404 Not Found', true);
exit();
}

// Attach a Retina Images header for debugging
if (!DISABLE_RI_HEADER) {
header('X-Retina-Images: '.$status);
}

// Send cache headers
if (SEND_CACHE_CONTROL) {
Expand Down Expand Up @@ -81,7 +130,7 @@
}

// Send image headers
if (in_array($source_ext, array('png', 'gif', 'jpeg', 'bmp'))) {
if (in_array($source_ext, ['png', 'gif', 'jpeg', 'bmp'])) {
header("Content-Type: image/".$source_ext, true);
}
else {
Expand All @@ -96,7 +145,12 @@
}

// Send file
readfile($source_file);
if (USE_X_SENDFILE) {
header('X-Sendfile: '.$source_file);
}
else {
readfile($source_file);
}
exit();
}

Expand All @@ -105,7 +159,7 @@
$dpr = $_GET['devicePixelRatio'];

// Validate value before setting cookie
if (''.intval($dpr) !== $dpr) {
if (''.ceil(intval($dpr)) !== $dpr) {
$dpr = '1';
}

Expand Down

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