260 lines
9.1 KiB
PHP
260 lines
9.1 KiB
PHP
<?php
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require_once '_inc.php';
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require_once 'HTTP/Encoder.php';
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function test_HTTP_Encoder()
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{
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global $thisDir;
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HTTP_Encoder::$encodeToIe6 = true;
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$methodTests = array(
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array(
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'ua' => 'Any browser'
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,'ae' => 'compress, x-gzip'
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,'exp' => array('gzip', 'x-gzip')
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,'desc' => 'recognize "x-gzip" as gzip'
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)
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,array(
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'ua' => 'Any browser'
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,'ae' => 'compress, x-gzip;q=0.5'
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,'exp' => array('gzip', 'x-gzip')
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,'desc' => 'gzip w/ non-zero q'
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)
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,array(
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'ua' => 'Any browser'
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,'ae' => 'compress, x-gzip;q=0'
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,'exp' => array('compress', 'compress')
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,'desc' => 'gzip w/ zero q'
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)
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,array(
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'ua' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)'
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,'ae' => 'gzip, deflate'
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,'exp' => array('', '')
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,'desc' => 'IE6 w/o "enhanced security"'
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)
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,array(
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'ua' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)'
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,'ae' => 'gzip, deflate'
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,'exp' => array('gzip', 'gzip')
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,'desc' => 'IE6 w/ "enhanced security"'
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)
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,array(
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'ua' => 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.01)'
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,'ae' => 'gzip, deflate'
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,'exp' => array('', '')
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,'desc' => 'IE5.5'
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)
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,array(
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'ua' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; en) Opera 9.25'
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,'ae' => 'gzip,deflate'
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,'exp' => array('gzip', 'gzip')
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,'desc' => 'Opera identifying as IE6'
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)
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);
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foreach ($methodTests as $test) {
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$_SERVER['HTTP_USER_AGENT'] = $test['ua'];
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$_SERVER['HTTP_ACCEPT_ENCODING'] = $test['ae'];
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$exp = $test['exp'];
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$ret = HTTP_Encoder::getAcceptedEncoding();
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$passed = assertTrue($exp == $ret, 'HTTP_Encoder : ' . $test['desc']);
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if (__FILE__ === realpath($_SERVER['SCRIPT_FILENAME'])) {
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echo "\n--- AE | UA = {$test['ae']} | {$test['ua']}\n";
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echo "Expected = " . preg_replace('/\\s+/', ' ', var_export($exp, 1)) . "\n";
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echo "Returned = " . preg_replace('/\\s+/', ' ', var_export($ret, 1)) . "\n\n";
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}
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}
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HTTP_Encoder::$encodeToIe6 = false;
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$methodTests = array(
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array(
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'ua' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)'
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,'ae' => 'gzip, deflate'
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,'exp' => array('', '')
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,'desc' => 'IE6 w/ "enhanced security"'
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)
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);
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foreach ($methodTests as $test) {
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$_SERVER['HTTP_USER_AGENT'] = $test['ua'];
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$_SERVER['HTTP_ACCEPT_ENCODING'] = $test['ae'];
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$exp = $test['exp'];
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$ret = HTTP_Encoder::getAcceptedEncoding();
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$passed = assertTrue($exp == $ret, 'HTTP_Encoder : ' . $test['desc']);
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if (__FILE__ === realpath($_SERVER['SCRIPT_FILENAME'])) {
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echo "\n--- AE | UA = {$test['ae']} | {$test['ua']}\n";
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echo "Expected = " . preg_replace('/\\s+/', ' ', var_export($exp, 1)) . "\n";
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echo "Returned = " . preg_replace('/\\s+/', ' ', var_export($ret, 1)) . "\n\n";
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}
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}
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if (! function_exists('gzdeflate')) {
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echo "!WARN: HTTP_Encoder : Zlib support is not present in PHP. Encoding cannot be performed/tested.\n";
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return;
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}
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// test compression of varied content (HTML,JS, & CSS)
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$variedContent = file_get_contents($thisDir . '/_test_files/html/before.html')
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. file_get_contents($thisDir . '/_test_files/css/subsilver.css')
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. file_get_contents($thisDir . '/_test_files/js/jquery-1.2.3.js');
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$variedLength = strlen($variedContent);
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$encodingTests = array(
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array('method' => 'deflate', 'inv' => 'gzinflate', 'exp' => 32157)
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,array('method' => 'gzip', 'inv' => '_gzdecode', 'exp' => 32175)
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,array('method' => 'compress', 'inv' => 'gzuncompress', 'exp' => 32211)
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);
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foreach ($encodingTests as $test) {
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$e = new HTTP_Encoder(array(
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'content' => $variedContent
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,'method' => $test['method']
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));
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$e->encode(9);
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$ret = strlen($e->getContent());
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// test uncompression
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$roundTrip = @call_user_func($test['inv'], $e->getContent());
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$desc = "HTTP_Encoder : {$test['method']} : uncompress possible";
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$passed = assertTrue($variedContent == $roundTrip, $desc);
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// test expected compressed size
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$desc = "HTTP_Encoder : {$test['method']} : compressed to "
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. sprintf('%4.2f%% of original', $ret/$variedLength*100);
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$passed = assertTrue(abs($ret - $test['exp']) < 100, $desc);
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if (__FILE__ === realpath($_SERVER['SCRIPT_FILENAME'])) {
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echo "\n--- {$test['method']}: expected bytes: "
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, "{$test['exp']}. Returned: {$ret} "
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, "(off by ". abs($ret - $test['exp']) . " bytes)\n\n";
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}
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}
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$_SERVER['HTTP_ACCEPT_ENCODING'] = 'identity';
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$he = new HTTP_Encoder(array(
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'content' => 'Hello'
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));
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$he->encode();
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$headers = $he->getHeaders();
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assertTrue(isset($headers['Vary']), 'HTTP_Encoder : Vary always sent');
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}
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test_HTTP_Encoder();
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function _gzdecode($data)
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{
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$filename = $error = '';
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return _phpman_gzdecode($data, $filename, $error);
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}
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// http://www.php.net/manual/en/function.gzdecode.php#82930
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function _phpman_gzdecode($data, &$filename='', &$error='', $maxlength=null)
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{
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$len = strlen($data);
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if ($len < 18 || strcmp(substr($data,0,2),"\x1f\x8b")) {
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$error = "Not in GZIP format.";
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return null; // Not GZIP format (See RFC 1952)
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}
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$method = ord(substr($data,2,1)); // Compression method
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$flags = ord(substr($data,3,1)); // Flags
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if ($flags & 31 != $flags) {
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$error = "Reserved bits not allowed.";
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return null;
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}
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// NOTE: $mtime may be negative (PHP integer limitations)
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$mtime = unpack("V", substr($data,4,4));
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$mtime = $mtime[1];
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$xfl = substr($data,8,1);
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$os = substr($data,8,1);
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$headerlen = 10;
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$extralen = 0;
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$extra = "";
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if ($flags & 4) {
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// 2-byte length prefixed EXTRA data in header
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if ($len - $headerlen - 2 < 8) {
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return false; // invalid
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}
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$extralen = unpack("v",substr($data,8,2));
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$extralen = $extralen[1];
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if ($len - $headerlen - 2 - $extralen < 8) {
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return false; // invalid
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}
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$extra = substr($data,10,$extralen);
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$headerlen += 2 + $extralen;
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}
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$filenamelen = 0;
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$filename = "";
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if ($flags & 8) {
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// C-style string
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if ($len - $headerlen - 1 < 8) {
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return false; // invalid
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}
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$filenamelen = strpos(substr($data,$headerlen),chr(0));
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if ($filenamelen === false || $len - $headerlen - $filenamelen - 1 < 8) {
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return false; // invalid
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}
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$filename = substr($data,$headerlen,$filenamelen);
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$headerlen += $filenamelen + 1;
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}
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$commentlen = 0;
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$comment = "";
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if ($flags & 16) {
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// C-style string COMMENT data in header
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if ($len - $headerlen - 1 < 8) {
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return false; // invalid
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}
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$commentlen = strpos(substr($data,$headerlen),chr(0));
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if ($commentlen === false || $len - $headerlen - $commentlen - 1 < 8) {
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return false; // Invalid header format
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}
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$comment = substr($data,$headerlen,$commentlen);
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$headerlen += $commentlen + 1;
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}
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$headercrc = "";
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if ($flags & 2) {
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// 2-bytes (lowest order) of CRC32 on header present
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if ($len - $headerlen - 2 < 8) {
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return false; // invalid
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}
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$calccrc = crc32(substr($data,0,$headerlen)) & 0xffff;
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$headercrc = unpack("v", substr($data,$headerlen,2));
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$headercrc = $headercrc[1];
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if ($headercrc != $calccrc) {
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$error = "Header checksum failed.";
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return false; // Bad header CRC
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}
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$headerlen += 2;
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}
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// GZIP FOOTER
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$datacrc = unpack("V",substr($data,-8,4));
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$datacrc = sprintf('%u',$datacrc[1] & 0xFFFFFFFF);
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$isize = unpack("V",substr($data,-4));
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$isize = $isize[1];
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// decompression:
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$bodylen = $len-$headerlen-8;
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if ($bodylen < 1) {
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// IMPLEMENTATION BUG!
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return null;
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}
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$body = substr($data,$headerlen,$bodylen);
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$data = "";
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if ($bodylen > 0) {
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switch ($method) {
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case 8:
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// Currently the only supported compression method:
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$data = gzinflate($body,$maxlength);
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break;
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default:
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$error = "Unknown compression method.";
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return false;
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}
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} // zero-byte body content is allowed
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// Verifiy CRC32
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$crc = sprintf("%u",crc32($data));
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$crcOK = $crc == $datacrc;
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$lenOK = $isize == strlen($data);
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if (!$lenOK || !$crcOK) {
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$error = ( $lenOK ? '' : 'Length check FAILED. ') . ( $crcOK ? '' : 'Checksum FAILED.');
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return false;
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}
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return $data;
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} |