dahlia/index.php

## index.php
<?php
# Simple Image Resizing API
#
# A simple HTTP API for resizing an image (given by the URL).
# This small and dirty ad hoc web application is entirely written in
# PHP 5.3+ with GD. The source code is distributed under Public License.

function is_url($string, $scheme = null) {
    $url = parse_url($string);
    if (!isset($url['scheme'])) return false;
    return is_null($scheme) || $url['scheme'] == $scheme;
}

function resize_image($image, $width = null, $height = null) {
    $img_width = imagesx($image);
    $img_height = imagesy($image);
    if ($width && is_null($height)) {
        $height = $img_height * ($width / $img_width);
    } else if (is_null($width) && $height) {
        $width = $img_width * ($height / $img_height);
    } else if (is_null($width) && is_null($height)) {
        $width = $img_width;
        $height = $img_height;
    }
    $new_image = imagecreatetruecolor($width, $height);
    imagealphablending($new_image, true);
    imagecopyresampled($new_image, $image,
                       0, 0, 0, 0,
                       $width, $height, $img_width, $img_height);
    return $new_image;
}

$mimetypes = array('png' => 'image/png', 'jpg' => 'image/jpeg',
                   'jpeg' => 'image/jpeg', 'wbmp' => 'image/vnd.wap.wbmp',
                   'gif' => 'image/gif');
$formats = array('png' => 'imagepng', 'jpg' => 'imagejpeg',
                 'jpeg' => 'imagejpeg', 'wbmp' => 'imagewbmp',
                 'gif' => 'imagegif');

$url = isset($_GET['url']) ? trim($_GET['url']) : null;
$width = isset($_GET['width']) ? (int) trim($_GET['width']) : null;
$height = isset($_GET['height']) ? (int) trim($_GET['height']) : null;
$format = isset($_GET['format']) ? trim(strtolower($_GET['format'])) : 'png';

if (!$url) {
    header('Content-Type: text/html; charset=utf-8');
    $fd = fopen(__FILE__, 'r');
    fseek($fd, __COMPILER_HALT_OFFSET__);
    $first = true;
    while (!feof($fd)) {
        $buffer = fread($fd, 8192);
        if ($first) {
            $first = false;
            $buffer = preg_replace('/\s*\?>/', '', $buffer);
        }
        echo $buffer;
    }
    fclose($fd);
    exit;
} else if (!is_url($url, 'http') && !is_url($url, 'https')) {
    header('HTTP/1.1 403 Forbidden');
    header('Content-Type: text/plain; charset=ascii');
    echo "Invalid HTTP URL: $url";
    exit;
} else if (empty($mimetypes[$format])) {
    header('HTTP/1.1 403 Forbidden');
    header('Content-Type: text/plain; charset=ascii');
    echo "Unsupported format: $format";
    exit;
}

$image_data = file_get_contents($url);
$image = imagecreatefromstring($image_data);
$resized_image = resize_image($image, $width, $height);
imagedestroy($image);
header("Content-Type: $mimetypes[$format]");
$func = $formats[$format];
if ($func == 'imagepng') {
    imagepng($resized_image, null, 9);
} else if ($func == 'imagejpeg') {
    imagejpeg($resized_image, null, 100);
} else {
    $func($resized_image);
}
imagedestroy($resized_image);
__halt_compiler();

?>

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Simple Image Resizing API</title>
  <head>
  <body>
    <h1>Simple Image Resizing API</h1>
    <p>A simple HTTP API for resizing an image (given by the URL).</p>
    <h2>Query Parameters</h2>
    <dl>
      <dt><code>url</code></dt>
      <dd>An image URL.</dd>
      <dt><code>width</code></dt>
      <dd>A number of the width to be resized in pixel.</dd>
      <dt><code>height</code></dt>
      <dd>A number of the height to be resized in pixel.</dd>
      <dt><code>format</code></dt>
      <dd>An output image format. Choose one in:
          <ul><li><code>png</code> (default)</li>
              <li><code>jpeg</code></li>
              <li><code>gif</code></li></ul></dd>
    </dl>
    <h2>Examples</h2>
    <ul>
      <li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&format=gif">
          <code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&format=gif</code></a></li>
      <li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=200">
          <code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=100</code></a></li>
      <li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=200&height=200">
            <code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=100&height=200</code>
          </a></li>
    </ul>
    <h2>Source Code</h2>
    <p>This small and dirty ad hoc web application is entirely written in
       PHP 5.3+ with GD.</p>
    <p>You can checkout this code from GitHub Gist:
       <a href="http://gist.github.com/651817">
         http://gist.github.com/651817</a>.</p>
    <p>The source code is distributed under Public License.</p>
  </body>
</html>
	<?php
	# Simple Image Resizing API
	#
	# A simple HTTP API for resizing an image (given by the URL).
	# This small and dirty ad hoc web application is entirely written in
	# PHP 5.3+ with GD. The source code is distributed under Public License.

	function is_url($string, $scheme = null) {
	$url = parse_url($string);
	if (!isset($url['scheme'])) return false;
	return is_null($scheme) \|\| $url['scheme'] == $scheme;
	}

	function resize_image($image, $width = null, $height = null) {
	$img_width = imagesx($image);
	$img_height = imagesy($image);
	if ($width && is_null($height)) {
	$height = $img_height * ($width / $img_width);
	} else if (is_null($width) && $height) {
	$width = $img_width * ($height / $img_height);
	} else if (is_null($width) && is_null($height)) {
	$width = $img_width;
	$height = $img_height;
	}
	$new_image = imagecreatetruecolor($width, $height);
	imagealphablending($new_image, true);
	imagecopyresampled($new_image, $image,
	0, 0, 0, 0,
	$width, $height, $img_width, $img_height);
	return $new_image;
	}

	$mimetypes = array('png' => 'image/png', 'jpg' => 'image/jpeg',
	'jpeg' => 'image/jpeg', 'wbmp' => 'image/vnd.wap.wbmp',
	'gif' => 'image/gif');
	$formats = array('png' => 'imagepng', 'jpg' => 'imagejpeg',
	'jpeg' => 'imagejpeg', 'wbmp' => 'imagewbmp',
	'gif' => 'imagegif');

	$url = isset($_GET['url']) ? trim($_GET['url']) : null;
	$width = isset($_GET['width']) ? (int) trim($_GET['width']) : null;
	$height = isset($_GET['height']) ? (int) trim($_GET['height']) : null;
	$format = isset($_GET['format']) ? trim(strtolower($_GET['format'])) : 'png';

	if (!$url) {
	header('Content-Type: text/html; charset=utf-8');
	$fd = fopen(__FILE__, 'r');
	fseek($fd, __COMPILER_HALT_OFFSET__);
	$first = true;
	while (!feof($fd)) {
	$buffer = fread($fd, 8192);
	if ($first) {
	$first = false;
	$buffer = preg_replace('/\s*\?>/', '', $buffer);
	}
	echo $buffer;
	}
	fclose($fd);
	exit;
	} else if (!is_url($url, 'http') && !is_url($url, 'https')) {
	header('HTTP/1.1 403 Forbidden');
	header('Content-Type: text/plain; charset=ascii');
	echo "Invalid HTTP URL: $url";
	exit;
	} else if (empty($mimetypes[$format])) {
	header('HTTP/1.1 403 Forbidden');
	header('Content-Type: text/plain; charset=ascii');
	echo "Unsupported format: $format";
	exit;
	}

	$image_data = file_get_contents($url);
	$image = imagecreatefromstring($image_data);
	$resized_image = resize_image($image, $width, $height);
	imagedestroy($image);
	header("Content-Type: $mimetypes[$format]");
	$func = $formats[$format];
	if ($func == 'imagepng') {
	imagepng($resized_image, null, 9);
	} else if ($func == 'imagejpeg') {
	imagejpeg($resized_image, null, 100);
	} else {
	$func($resized_image);
	}
	imagedestroy($resized_image);
	__halt_compiler();

	?>

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="utf-8" />
	<title>Simple Image Resizing API</title>
	<head>
	<body>
	<h1>Simple Image Resizing API</h1>
	<p>A simple HTTP API for resizing an image (given by the URL).</p>
	<h2>Query Parameters</h2>
	<dl>
	<dt><code>url</code></dt>
	<dd>An image URL.</dd>
	<dt><code>width</code></dt>
	<dd>A number of the width to be resized in pixel.</dd>
	<dt><code>height</code></dt>
	<dd>A number of the height to be resized in pixel.</dd>
	<dt><code>format</code></dt>
	<dd>An output image format. Choose one in:
	<ul><li><code>png</code> (default)</li>
	<li><code>jpeg</code></li>
	<li><code>gif</code></li></ul></dd>
	</dl>
	<h2>Examples</h2>
	<ul>
	<li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&format=gif">
	<code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&format=gif</code></a></li>
	<li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=200">
	<code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=100</code></a></li>
	<li><a href="?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=200&height=200">
	<code>?url=http%3A%2F%2Fbit.ly%2F9yK8wz&width=100&height=200</code>
	</a></li>
	</ul>
	<h2>Source Code</h2>
	<p>This small and dirty ad hoc web application is entirely written in
	PHP 5.3+ with GD.</p>
	<p>You can checkout this code from GitHub Gist:
	<a href="http://gist.github.com/651817">
	http://gist.github.com/651817</a>.</p>
	<p>The source code is distributed under Public License.</p>
	</body>
	</html>