WordPress/wp-includes/class-requests.php
desrosj 27485fd7aa General: Continuing to work towards a passing PHP Compatibility scan.
This is a final pass to fix PHP compatibiilty issues in the codebase with code changes or adding `phpcs:ignore` comments.

With this change, all PHP compatibility warnings and errors without specific tickets have been addressed (see #49810 and #41750).

Props desrosj, johnbillion, jrf.
See #49922.
Built from https://develop.svn.wordpress.org/trunk@47902


git-svn-id: http://core.svn.wordpress.org/trunk@47676 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2020-06-03 17:40:12 +00:00

983 lines
29 KiB
PHP
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<?php
/**
* Requests for PHP
*
* Inspired by Requests for Python.
*
* Based on concepts from SimplePie_File, RequestCore and WP_Http.
*
* @package Requests
*/
/**
* Requests for PHP
*
* Inspired by Requests for Python.
*
* Based on concepts from SimplePie_File, RequestCore and WP_Http.
*
* @package Requests
*/
class Requests {
/**
* POST method
*
* @var string
*/
const POST = 'POST';
/**
* PUT method
*
* @var string
*/
const PUT = 'PUT';
/**
* GET method
*
* @var string
*/
const GET = 'GET';
/**
* HEAD method
*
* @var string
*/
const HEAD = 'HEAD';
/**
* DELETE method
*
* @var string
*/
const DELETE = 'DELETE';
/**
* OPTIONS method
*
* @var string
*/
const OPTIONS = 'OPTIONS';
/**
* TRACE method
*
* @var string
*/
const TRACE = 'TRACE';
/**
* PATCH method
*
* @link https://tools.ietf.org/html/rfc5789
* @var string
*/
const PATCH = 'PATCH';
/**
* Default size of buffer size to read streams
*
* @var integer
*/
const BUFFER_SIZE = 1160;
/**
* Current version of Requests
*
* @var string
*/
const VERSION = '1.7-3470169';
/**
* Registered transport classes
*
* @var array
*/
protected static $transports = array();
/**
* Selected transport name
*
* Use {@see get_transport()} instead
*
* @var array
*/
public static $transport = array();
/**
* Default certificate path.
*
* @see Requests::get_certificate_path()
* @see Requests::set_certificate_path()
*
* @var string
*/
protected static $certificate_path;
/**
* This is a static class, do not instantiate it
*
* @codeCoverageIgnore
*/
private function __construct() {}
/**
* Autoloader for Requests
*
* Register this with {@see register_autoloader()} if you'd like to avoid
* having to create your own.
*
* (You can also use `spl_autoload_register` directly if you'd prefer.)
*
* @codeCoverageIgnore
*
* @param string $class Class name to load
*/
public static function autoloader($class) {
// Check that the class starts with "Requests"
if (strpos($class, 'Requests') !== 0) {
return;
}
$file = str_replace('_', '/', $class);
if (file_exists(dirname(__FILE__) . '/' . $file . '.php')) {
require_once(dirname(__FILE__) . '/' . $file . '.php');
}
}
/**
* Register the built-in autoloader
*
* @codeCoverageIgnore
*/
public static function register_autoloader() {
spl_autoload_register(array('Requests', 'autoloader'));
}
/**
* Register a transport
*
* @param string $transport Transport class to add, must support the Requests_Transport interface
*/
public static function add_transport($transport) {
if (empty(self::$transports)) {
self::$transports = array(
'Requests_Transport_cURL',
'Requests_Transport_fsockopen',
);
}
self::$transports = array_merge(self::$transports, array($transport));
}
/**
* Get a working transport
*
* @throws Requests_Exception If no valid transport is found (`notransport`)
* @return Requests_Transport
*/
protected static function get_transport($capabilities = array()) {
// Caching code, don't bother testing coverage
// @codeCoverageIgnoreStart
// array of capabilities as a string to be used as an array key
ksort($capabilities);
$cap_string = serialize($capabilities);
// Don't search for a transport if it's already been done for these $capabilities
if (isset(self::$transport[$cap_string]) && self::$transport[$cap_string] !== null) {
$class = self::$transport[$cap_string];
return new $class();
}
// @codeCoverageIgnoreEnd
if (empty(self::$transports)) {
self::$transports = array(
'Requests_Transport_cURL',
'Requests_Transport_fsockopen',
);
}
// Find us a working transport
foreach (self::$transports as $class) {
if (!class_exists($class)) {
continue;
}
$result = call_user_func(array($class, 'test'), $capabilities);
if ($result) {
self::$transport[$cap_string] = $class;
break;
}
}
if (self::$transport[$cap_string] === null) {
throw new Requests_Exception('No working transports found', 'notransport', self::$transports);
}
$class = self::$transport[$cap_string];
return new $class();
}
/**#@+
* @see request()
* @param string $url
* @param array $headers
* @param array $options
* @return Requests_Response
*/
/**
* Send a GET request
*/
public static function get($url, $headers = array(), $options = array()) {
return self::request($url, $headers, null, self::GET, $options);
}
/**
* Send a HEAD request
*/
public static function head($url, $headers = array(), $options = array()) {
return self::request($url, $headers, null, self::HEAD, $options);
}
/**
* Send a DELETE request
*/
public static function delete($url, $headers = array(), $options = array()) {
return self::request($url, $headers, null, self::DELETE, $options);
}
/**
* Send a TRACE request
*/
public static function trace($url, $headers = array(), $options = array()) {
return self::request($url, $headers, null, self::TRACE, $options);
}
/**#@-*/
/**#@+
* @see request()
* @param string $url
* @param array $headers
* @param array $data
* @param array $options
* @return Requests_Response
*/
/**
* Send a POST request
*/
public static function post($url, $headers = array(), $data = array(), $options = array()) {
return self::request($url, $headers, $data, self::POST, $options);
}
/**
* Send a PUT request
*/
public static function put($url, $headers = array(), $data = array(), $options = array()) {
return self::request($url, $headers, $data, self::PUT, $options);
}
/**
* Send an OPTIONS request
*/
public static function options($url, $headers = array(), $data = array(), $options = array()) {
return self::request($url, $headers, $data, self::OPTIONS, $options);
}
/**
* Send a PATCH request
*
* Note: Unlike {@see post} and {@see put}, `$headers` is required, as the
* specification recommends that should send an ETag
*
* @link https://tools.ietf.org/html/rfc5789
*/
public static function patch($url, $headers, $data = array(), $options = array()) {
return self::request($url, $headers, $data, self::PATCH, $options);
}
/**#@-*/
/**
* Main interface for HTTP requests
*
* This method initiates a request and sends it via a transport before
* parsing.
*
* The `$options` parameter takes an associative array with the following
* options:
*
* - `timeout`: How long should we wait for a response?
* Note: for cURL, a minimum of 1 second applies, as DNS resolution
* operates at second-resolution only.
* (float, seconds with a millisecond precision, default: 10, example: 0.01)
* - `connect_timeout`: How long should we wait while trying to connect?
* (float, seconds with a millisecond precision, default: 10, example: 0.01)
* - `useragent`: Useragent to send to the server
* (string, default: php-requests/$version)
* - `follow_redirects`: Should we follow 3xx redirects?
* (boolean, default: true)
* - `redirects`: How many times should we redirect before erroring?
* (integer, default: 10)
* - `blocking`: Should we block processing on this request?
* (boolean, default: true)
* - `filename`: File to stream the body to instead.
* (string|boolean, default: false)
* - `auth`: Authentication handler or array of user/password details to use
* for Basic authentication
* (Requests_Auth|array|boolean, default: false)
* - `proxy`: Proxy details to use for proxy by-passing and authentication
* (Requests_Proxy|array|string|boolean, default: false)
* - `max_bytes`: Limit for the response body size.
* (integer|boolean, default: false)
* - `idn`: Enable IDN parsing
* (boolean, default: true)
* - `transport`: Custom transport. Either a class name, or a
* transport object. Defaults to the first working transport from
* {@see getTransport()}
* (string|Requests_Transport, default: {@see getTransport()})
* - `hooks`: Hooks handler.
* (Requests_Hooker, default: new Requests_Hooks())
* - `verify`: Should we verify SSL certificates? Allows passing in a custom
* certificate file as a string. (Using true uses the system-wide root
* certificate store instead, but this may have different behaviour
* across transports.)
* (string|boolean, default: library/Requests/Transport/cacert.pem)
* - `verifyname`: Should we verify the common name in the SSL certificate?
* (boolean: default, true)
* - `data_format`: How should we send the `$data` parameter?
* (string, one of 'query' or 'body', default: 'query' for
* HEAD/GET/DELETE, 'body' for POST/PUT/OPTIONS/PATCH)
*
* @throws Requests_Exception On invalid URLs (`nonhttp`)
*
* @param string $url URL to request
* @param array $headers Extra headers to send with the request
* @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
* @param string $type HTTP request type (use Requests constants)
* @param array $options Options for the request (see description for more information)
* @return Requests_Response
*/
public static function request($url, $headers = array(), $data = array(), $type = self::GET, $options = array()) {
if (empty($options['type'])) {
$options['type'] = $type;
}
$options = array_merge(self::get_default_options(), $options);
self::set_defaults($url, $headers, $data, $type, $options);
$options['hooks']->dispatch('requests.before_request', array(&$url, &$headers, &$data, &$type, &$options));
if (!empty($options['transport'])) {
$transport = $options['transport'];
if (is_string($options['transport'])) {
$transport = new $transport();
}
}
else {
$need_ssl = (0 === stripos($url, 'https://'));
$capabilities = array('ssl' => $need_ssl);
$transport = self::get_transport($capabilities);
}
$response = $transport->request($url, $headers, $data, $options);
$options['hooks']->dispatch('requests.before_parse', array(&$response, $url, $headers, $data, $type, $options));
return self::parse_response($response, $url, $headers, $data, $options);
}
/**
* Send multiple HTTP requests simultaneously
*
* The `$requests` parameter takes an associative or indexed array of
* request fields. The key of each request can be used to match up the
* request with the returned data, or with the request passed into your
* `multiple.request.complete` callback.
*
* The request fields value is an associative array with the following keys:
*
* - `url`: Request URL Same as the `$url` parameter to
* {@see Requests::request}
* (string, required)
* - `headers`: Associative array of header fields. Same as the `$headers`
* parameter to {@see Requests::request}
* (array, default: `array()`)
* - `data`: Associative array of data fields or a string. Same as the
* `$data` parameter to {@see Requests::request}
* (array|string, default: `array()`)
* - `type`: HTTP request type (use Requests constants). Same as the `$type`
* parameter to {@see Requests::request}
* (string, default: `Requests::GET`)
* - `cookies`: Associative array of cookie name to value, or cookie jar.
* (array|Requests_Cookie_Jar)
*
* If the `$options` parameter is specified, individual requests will
* inherit options from it. This can be used to use a single hooking system,
* or set all the types to `Requests::POST`, for example.
*
* In addition, the `$options` parameter takes the following global options:
*
* - `complete`: A callback for when a request is complete. Takes two
* parameters, a Requests_Response/Requests_Exception reference, and the
* ID from the request array (Note: this can also be overridden on a
* per-request basis, although that's a little silly)
* (callback)
*
* @param array $requests Requests data (see description for more information)
* @param array $options Global and default options (see {@see Requests::request})
* @return array Responses (either Requests_Response or a Requests_Exception object)
*/
public static function request_multiple($requests, $options = array()) {
$options = array_merge(self::get_default_options(true), $options);
if (!empty($options['hooks'])) {
$options['hooks']->register('transport.internal.parse_response', array('Requests', 'parse_multiple'));
if (!empty($options['complete'])) {
$options['hooks']->register('multiple.request.complete', $options['complete']);
}
}
foreach ($requests as $id => &$request) {
if (!isset($request['headers'])) {
$request['headers'] = array();
}
if (!isset($request['data'])) {
$request['data'] = array();
}
if (!isset($request['type'])) {
$request['type'] = self::GET;
}
if (!isset($request['options'])) {
$request['options'] = $options;
$request['options']['type'] = $request['type'];
}
else {
if (empty($request['options']['type'])) {
$request['options']['type'] = $request['type'];
}
$request['options'] = array_merge($options, $request['options']);
}
self::set_defaults($request['url'], $request['headers'], $request['data'], $request['type'], $request['options']);
// Ensure we only hook in once
if ($request['options']['hooks'] !== $options['hooks']) {
$request['options']['hooks']->register('transport.internal.parse_response', array('Requests', 'parse_multiple'));
if (!empty($request['options']['complete'])) {
$request['options']['hooks']->register('multiple.request.complete', $request['options']['complete']);
}
}
}
unset($request);
if (!empty($options['transport'])) {
$transport = $options['transport'];
if (is_string($options['transport'])) {
$transport = new $transport();
}
}
else {
$transport = self::get_transport();
}
$responses = $transport->request_multiple($requests, $options);
foreach ($responses as $id => &$response) {
// If our hook got messed with somehow, ensure we end up with the
// correct response
if (is_string($response)) {
$request = $requests[$id];
self::parse_multiple($response, $request);
$request['options']['hooks']->dispatch('multiple.request.complete', array(&$response, $id));
}
}
return $responses;
}
/**
* Get the default options
*
* @see Requests::request() for values returned by this method
* @param boolean $multirequest Is this a multirequest?
* @return array Default option values
*/
protected static function get_default_options($multirequest = false) {
$defaults = array(
'timeout' => 10,
'connect_timeout' => 10,
'useragent' => 'php-requests/' . self::VERSION,
'protocol_version' => 1.1,
'redirected' => 0,
'redirects' => 10,
'follow_redirects' => true,
'blocking' => true,
'type' => self::GET,
'filename' => false,
'auth' => false,
'proxy' => false,
'cookies' => false,
'max_bytes' => false,
'idn' => true,
'hooks' => null,
'transport' => null,
'verify' => Requests::get_certificate_path(),
'verifyname' => true,
);
if ($multirequest !== false) {
$defaults['complete'] = null;
}
return $defaults;
}
/**
* Get default certificate path.
*
* @return string Default certificate path.
*/
public static function get_certificate_path() {
if ( ! empty( Requests::$certificate_path ) ) {
return Requests::$certificate_path;
}
return dirname(__FILE__) . '/Requests/Transport/cacert.pem';
}
/**
* Set default certificate path.
*
* @param string $path Certificate path, pointing to a PEM file.
*/
public static function set_certificate_path( $path ) {
Requests::$certificate_path = $path;
}
/**
* Set the default values
*
* @param string $url URL to request
* @param array $headers Extra headers to send with the request
* @param array|null $data Data to send either as a query string for GET/HEAD requests, or in the body for POST requests
* @param string $type HTTP request type
* @param array $options Options for the request
* @return array $options
*/
protected static function set_defaults(&$url, &$headers, &$data, &$type, &$options) {
if (!preg_match('/^http(s)?:\/\//i', $url, $matches)) {
throw new Requests_Exception('Only HTTP(S) requests are handled.', 'nonhttp', $url);
}
if (empty($options['hooks'])) {
$options['hooks'] = new Requests_Hooks();
}
if (is_array($options['auth'])) {
$options['auth'] = new Requests_Auth_Basic($options['auth']);
}
if ($options['auth'] !== false) {
$options['auth']->register($options['hooks']);
}
if (is_string($options['proxy']) || is_array($options['proxy'])) {
$options['proxy'] = new Requests_Proxy_HTTP($options['proxy']);
}
if ($options['proxy'] !== false) {
$options['proxy']->register($options['hooks']);
}
if (is_array($options['cookies'])) {
$options['cookies'] = new Requests_Cookie_Jar($options['cookies']);
}
elseif (empty($options['cookies'])) {
$options['cookies'] = new Requests_Cookie_Jar();
}
if ($options['cookies'] !== false) {
$options['cookies']->register($options['hooks']);
}
if ($options['idn'] !== false) {
$iri = new Requests_IRI($url);
$iri->host = Requests_IDNAEncoder::encode($iri->ihost);
$url = $iri->uri;
}
// Massage the type to ensure we support it.
$type = strtoupper($type);
if (!isset($options['data_format'])) {
if (in_array($type, array(self::HEAD, self::GET, self::DELETE))) {
$options['data_format'] = 'query';
}
else {
$options['data_format'] = 'body';
}
}
}
/**
* HTTP response parser
*
* @throws Requests_Exception On missing head/body separator (`requests.no_crlf_separator`)
* @throws Requests_Exception On missing head/body separator (`noversion`)
* @throws Requests_Exception On missing head/body separator (`toomanyredirects`)
*
* @param string $headers Full response text including headers and body
* @param string $url Original request URL
* @param array $req_headers Original $headers array passed to {@link request()}, in case we need to follow redirects
* @param array $req_data Original $data array passed to {@link request()}, in case we need to follow redirects
* @param array $options Original $options array passed to {@link request()}, in case we need to follow redirects
* @return Requests_Response
*/
protected static function parse_response($headers, $url, $req_headers, $req_data, $options) {
$return = new Requests_Response();
if (!$options['blocking']) {
return $return;
}
$return->raw = $headers;
$return->url = $url;
if (!$options['filename']) {
if (($pos = strpos($headers, "\r\n\r\n")) === false) {
// Crap!
throw new Requests_Exception('Missing header/body separator', 'requests.no_crlf_separator');
}
$headers = substr($return->raw, 0, $pos);
$return->body = substr($return->raw, $pos + strlen("\n\r\n\r"));
}
else {
$return->body = '';
}
// Pretend CRLF = LF for compatibility (RFC 2616, section 19.3)
$headers = str_replace("\r\n", "\n", $headers);
// Unfold headers (replace [CRLF] 1*( SP | HT ) with SP) as per RFC 2616 (section 2.2)
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
$headers = explode("\n", $headers);
preg_match('#^HTTP/(1\.\d)[ \t]+(\d+)#i', array_shift($headers), $matches);
if (empty($matches)) {
throw new Requests_Exception('Response could not be parsed', 'noversion', $headers);
}
$return->protocol_version = (float) $matches[1];
$return->status_code = (int) $matches[2];
if ($return->status_code >= 200 && $return->status_code < 300) {
$return->success = true;
}
foreach ($headers as $header) {
list($key, $value) = explode(':', $header, 2);
$value = trim($value);
preg_replace('#(\s+)#i', ' ', $value);
$return->headers[$key] = $value;
}
if (isset($return->headers['transfer-encoding'])) {
$return->body = self::decode_chunked($return->body);
unset($return->headers['transfer-encoding']);
}
if (isset($return->headers['content-encoding'])) {
$return->body = self::decompress($return->body);
}
//fsockopen and cURL compatibility
if (isset($return->headers['connection'])) {
unset($return->headers['connection']);
}
$options['hooks']->dispatch('requests.before_redirect_check', array(&$return, $req_headers, $req_data, $options));
if ($return->is_redirect() && $options['follow_redirects'] === true) {
if (isset($return->headers['location']) && $options['redirected'] < $options['redirects']) {
if ($return->status_code === 303) {
$options['type'] = self::GET;
}
$options['redirected']++;
$location = $return->headers['location'];
if (strpos($location, 'http://') !== 0 && strpos($location, 'https://') !== 0) {
// relative redirect, for compatibility make it absolute
$location = Requests_IRI::absolutize($url, $location);
$location = $location->uri;
}
$hook_args = array(
&$location,
&$req_headers,
&$req_data,
&$options,
$return
);
$options['hooks']->dispatch('requests.before_redirect', $hook_args);
$redirected = self::request($location, $req_headers, $req_data, $options['type'], $options);
$redirected->history[] = $return;
return $redirected;
}
elseif ($options['redirected'] >= $options['redirects']) {
throw new Requests_Exception('Too many redirects', 'toomanyredirects', $return);
}
}
$return->redirects = $options['redirected'];
$options['hooks']->dispatch('requests.after_request', array(&$return, $req_headers, $req_data, $options));
return $return;
}
/**
* Callback for `transport.internal.parse_response`
*
* Internal use only. Converts a raw HTTP response to a Requests_Response
* while still executing a multiple request.
*
* @param string $response Full response text including headers and body (will be overwritten with Response instance)
* @param array $request Request data as passed into {@see Requests::request_multiple()}
* @return null `$response` is either set to a Requests_Response instance, or a Requests_Exception object
*/
public static function parse_multiple(&$response, $request) {
try {
$url = $request['url'];
$headers = $request['headers'];
$data = $request['data'];
$options = $request['options'];
$response = self::parse_response($response, $url, $headers, $data, $options);
}
catch (Requests_Exception $e) {
$response = $e;
}
}
/**
* Decoded a chunked body as per RFC 2616
*
* @see https://tools.ietf.org/html/rfc2616#section-3.6.1
* @param string $data Chunked body
* @return string Decoded body
*/
protected static function decode_chunked($data) {
if (!preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', trim($data))) {
return $data;
}
$decoded = '';
$encoded = $data;
while (true) {
$is_chunked = (bool) preg_match('/^([0-9a-f]+)(?:;(?:[\w-]*)(?:=(?:(?:[\w-]*)*|"(?:[^\r\n])*"))?)*\r\n/i', $encoded, $matches);
if (!$is_chunked) {
// Looks like it's not chunked after all
return $data;
}
$length = hexdec(trim($matches[1]));
if ($length === 0) {
// Ignore trailer headers
return $decoded;
}
$chunk_length = strlen($matches[0]);
$decoded .= substr($encoded, $chunk_length, $length);
$encoded = substr($encoded, $chunk_length + $length + 2);
if (trim($encoded) === '0' || empty($encoded)) {
return $decoded;
}
}
// We'll never actually get down here
// @codeCoverageIgnoreStart
}
// @codeCoverageIgnoreEnd
/**
* Convert a key => value array to a 'key: value' array for headers
*
* @param array $array Dictionary of header values
* @return string[] List of headers
*/
public static function flatten($array) {
$return = array();
foreach ($array as $key => $value) {
$return[] = sprintf('%s: %s', $key, $value);
}
return $return;
}
/**
* Convert a key => value array to a 'key: value' array for headers
*
* @codeCoverageIgnore
* @deprecated Misspelling of {@see Requests::flatten}
* @param array $array Dictionary of header values
* @return string[] List of headers
*/
public static function flattern($array) {
return self::flatten($array);
}
/**
* Decompress an encoded body
*
* Implements gzip, compress and deflate. Guesses which it is by attempting
* to decode.
*
* @param string $data Compressed data in one of the above formats
* @return string Decompressed string
*/
public static function decompress($data) {
if (substr($data, 0, 2) !== "\x1f\x8b" && substr($data, 0, 2) !== "\x78\x9c") {
// Not actually compressed. Probably cURL ruining this for us.
return $data;
}
if (function_exists('gzdecode') && ($decoded = @gzdecode($data)) !== false) {
return $decoded;
}
elseif (function_exists('gzinflate') && ($decoded = @gzinflate($data)) !== false) {
return $decoded;
}
elseif (($decoded = self::compatible_gzinflate($data)) !== false) {
return $decoded;
}
elseif (function_exists('gzuncompress') && ($decoded = @gzuncompress($data)) !== false) {
return $decoded;
}
return $data;
}
/**
* Decompression of deflated string while staying compatible with the majority of servers.
*
* Certain Servers will return deflated data with headers which PHP's gzinflate()
* function cannot handle out of the box. The following function has been created from
* various snippets on the gzinflate() PHP documentation.
*
* Warning: Magic numbers within. Due to the potential different formats that the compressed
* data may be returned in, some "magic offsets" are needed to ensure proper decompression
* takes place. For a simple progmatic way to determine the magic offset in use, see:
* https://core.trac.wordpress.org/ticket/18273
*
* @since 2.8.1
* @link https://core.trac.wordpress.org/ticket/18273
* @link https://secure.php.net/manual/en/function.gzinflate.php#70875
* @link https://secure.php.net/manual/en/function.gzinflate.php#77336
*
* @param string $gzData String to decompress.
* @return string|bool False on failure.
*/
public static function compatible_gzinflate($gzData) {
// Compressed data might contain a full zlib header, if so strip it for
// gzinflate()
if (substr($gzData, 0, 3) == "\x1f\x8b\x08") {
$i = 10;
$flg = ord(substr($gzData, 3, 1));
if ($flg > 0) {
if ($flg & 4) {
list($xlen) = unpack('v', substr($gzData, $i, 2));
$i = $i + 2 + $xlen;
}
if ($flg & 8) {
$i = strpos($gzData, "\0", $i) + 1;
}
if ($flg & 16) {
$i = strpos($gzData, "\0", $i) + 1;
}
if ($flg & 2) {
$i = $i + 2;
}
}
$decompressed = self::compatible_gzinflate(substr($gzData, $i));
if (false !== $decompressed) {
return $decompressed;
}
}
// If the data is Huffman Encoded, we must first strip the leading 2
// byte Huffman marker for gzinflate()
// The response is Huffman coded by many compressors such as
// java.util.zip.Deflater, Rubys Zlib::Deflate, and .NET's
// System.IO.Compression.DeflateStream.
//
// See https://decompres.blogspot.com/ for a quick explanation of this
// data type
$huffman_encoded = false;
// low nibble of first byte should be 0x08
list(, $first_nibble) = unpack('h', $gzData);
// First 2 bytes should be divisible by 0x1F
list(, $first_two_bytes) = unpack('n', $gzData);
if (0x08 == $first_nibble && 0 == ($first_two_bytes % 0x1F)) {
$huffman_encoded = true;
}
if ($huffman_encoded) {
if (false !== ($decompressed = @gzinflate(substr($gzData, 2)))) {
return $decompressed;
}
}
if ("\x50\x4b\x03\x04" == substr($gzData, 0, 4)) {
// ZIP file format header
// Offset 6: 2 bytes, General-purpose field
// Offset 26: 2 bytes, filename length
// Offset 28: 2 bytes, optional field length
// Offset 30: Filename field, followed by optional field, followed
// immediately by data
list(, $general_purpose_flag) = unpack('v', substr($gzData, 6, 2));
// If the file has been compressed on the fly, 0x08 bit is set of
// the general purpose field. We can use this to differentiate
// between a compressed document, and a ZIP file
$zip_compressed_on_the_fly = (0x08 == (0x08 & $general_purpose_flag));
if (!$zip_compressed_on_the_fly) {
// Don't attempt to decode a compressed zip file
return $gzData;
}
// Determine the first byte of data, based on the above ZIP header
// offsets:
$first_file_start = array_sum(unpack('v2', substr($gzData, 26, 4)));
if (false !== ($decompressed = @gzinflate(substr($gzData, 30 + $first_file_start)))) {
return $decompressed;
}
return false;
}
// Finally fall back to straight gzinflate
if (false !== ($decompressed = @gzinflate($gzData))) {
return $decompressed;
}
// Fallback for all above failing, not expected, but included for
// debugging and preventing regressions and to track stats
if (false !== ($decompressed = @gzinflate(substr($gzData, 2)))) {
return $decompressed;
}
return false;
}
public static function match_domain($host, $reference) {
// Check for a direct match
if ($host === $reference) {
return true;
}
// Calculate the valid wildcard match if the host is not an IP address
// Also validates that the host has 3 parts or more, as per Firefox's
// ruleset.
$parts = explode('.', $host);
if (ip2long($host) === false && count($parts) >= 3) {
$parts[0] = '*';
$wildcard = implode('.', $parts);
if ($wildcard === $reference) {
return true;
}
}
return false;
}
}