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compress-test.php
81 lines (74 loc) · 2.01 KB
/
compress-test.php
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<?php
/******************************
* HTTP Compression Self-Test
* Source: http://sammitch.ca
* Version: 1.0
* Date: Jan 24, 2013
******************************/
// make sure cURL is available
if( ! function_exists('curl_init') ) {
die('You must have the cURL extension installed/enabled.');
// make sure the script isn't being called via command line
} else if( php_sapi_name() == 'cli' ) {
die('This script must be invoked via a web browser.');
}
// use a $_GET var to prevent infinite looping through HTTP requests
if( ! isset($_GET['self']) ) {
// common compression encodings we want to check for in order of desirability
// 'identity' means uncompressed
$encodings = array(
'gzip' => '1.0',
'deflate' => '0.5',
'compress' => '0.5',
'identity' => '0.1'
);
// create the header string
$temp = array();
foreach( $encodings as $key => $value ) {
$temp[] = sprintf('%s;q=%s', $key, $value);
}
$accept_header = 'Accept-Encoding: ' . implode(', ', $temp);
echo "<pre>Requesting the following encodings:\n\t" . $accept_header . "</pre>";
// prepare cURL
$uri = $_SERVER['SCRIPT_URI'] . '?self';
$ch = curl_init($uri);
curl_setopt_array($ch, array(
CURLOPT_HEADER => TRUE,
CURLOPT_NOBODY => TRUE,
CURLOPT_RETURNTRANSFER => TRUE,
CURLOPT_HTTPHEADER => array ($accept_header)
));
if( ! $return = curl_exec($ch) ) {
die('curl_exec failed: ' . curl_error($ch));
}
// check returned headers
$recv_enc = NULL;
foreach( explode("\r\n",$return) as $ret_header ) {
$h_arr = explode(':', $ret_header);
if( $h_arr[0] == 'Content-Encoding' ) {
$recv_enc = trim($h_arr[1]);
break;
}
}
// print results.
echo '<pre>';
if( ! (is_null($recv_enc) || $recv_enc == 'identity') ) {
echo 'Received Content-Encoding: ' . $recv_enc;
} else {
echo 'Content was received uncompressed.';
}
echo '</pre>';
} else {
// if $_GET['self'] is present print out an itty-bitty test page
echo <<<_EOF_
<!DOCTYPE HTML>
<html>
<head>
<title>Test page</title>
</head>
<body>
<h1>Test Page</h1>
</body>
</html>
_EOF_;
}