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<?php
namespace Phly\Http;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\MessageInterface;
use stdClass;
/**
* Class for marshaling a request object from the current PHP environment.
*
* Logic largely refactored from the ZF2 Zend\Http\PhpEnvironment\Request class.
*
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class ServerRequestFactory
{
/**
* Function to use to get apache request headers; present only to simplify mocking.
*
* @var callable
*/
private static $apacheRequestHeaders = 'apache_request_headers';
/**
* Create a request from the supplied superglobal values.
*
* If any argument is not supplied, the corresponding superglobal value will
* be used.
*
* The ServerRequest created is then passed to the fromServer() method in
* order to marshal the request URI and headers.
*
* @see fromServer()
* @param array $server $_SERVER superglobal
* @param array $query $_GET superglobal
* @param array $body $_POST superglobal
* @param array $cookies $_COOKIE superglobal
* @param array $files $_FILES superglobal
* @return ServerRequest
*/
public static function fromGlobals(
array $server = null,
array $query = null,
array $body = null,
array $cookies = null,
array $files = null
) {
$server = self::normalizeServer($server ?: $_SERVER);
$files = $files ?: $_FILES;
$headers = self::marshalHeaders($server);
$request = new ServerRequest(
$server,
$files,
self::marshalUriFromServer($server, $headers),
self::get('REQUEST_METHOD', $server, 'GET'),
'php://input',
$headers
);
return $request
->withCookieParams($cookies ?: $_COOKIE)
->withQueryParams($query ?: $_GET)
->withParsedBody($body ?: $_POST);
}
/**
* Access a value in an array, returning a default value if not found
*
* Will also do a case-insensitive search if a case sensitive search fails.
*
* @param string $key
* @param array $values
* @param mixed $default
* @return mixed
*/
public static function get($key, array $values, $default = null)
{
if (array_key_exists($key, $values)) {
return $values[$key];
}
return $default;
}
/**
* Search for a header value.
*
* Does a case-insensitive search for a matching header.
*
* If found, it is returned as a string, using comma concatenation.
*
* If not, the $default is returned.
*
* @param string $header
* @param array $headers
* @param mixed $default
* @return string
*/
public static function getHeader($header, array $headers, $default = null)
{
$header = strtolower($header);
$headers = array_change_key_case($headers, CASE_LOWER);
if (array_key_exists($header, $headers)) {
$value = is_array($headers[$header]) ? implode(', ', $headers[$header]) : $headers[$header];
return $value;
}
return $default;
}
/**
* Marshal the $_SERVER array
*
* Pre-processes and returns the $_SERVER superglobal.
*
* @return array
*/
public static function normalizeServer(array $server)
{
// This seems to be the only way to get the Authorization header on Apache
$apacheRequestHeaders = self::$apacheRequestHeaders;
if (isset($server['HTTP_AUTHORIZATION'])
|| ! is_callable($apacheRequestHeaders)
) {
return $server;
}
$apacheRequestHeaders = $apacheRequestHeaders();
if (isset($apacheRequestHeaders['Authorization'])) {
$server['HTTP_AUTHORIZATION'] = $apacheRequestHeaders['Authorization'];
return $server;
}
if (isset($apacheRequestHeaders['authorization'])) {
$server['HTTP_AUTHORIZATION'] = $apacheRequestHeaders['authorization'];
return $server;
}
return $server;
}
/**
* Marshal headers from $_SERVER
*
* @param array $server
* @return array
*/
public static function marshalHeaders(array $server)
{
$headers = array();
foreach ($server as $key => $value) {
if (strpos($key, 'HTTP_COOKIE') === 0) {
// Cookies are handled using the $_COOKIE superglobal
continue;
}
if ($value && strpos($key, 'HTTP_') === 0) {
$name = strtr(substr($key, 5), '_', ' ');
$name = strtr(ucwords(strtolower($name)), ' ', '-');
$name = strtolower($name);
$headers[$name] = $value;
continue;
}
if ($value && strpos($key, 'CONTENT_') === 0) {
$name = substr($key, 8); // Content-
$name = 'Content-' . (($name == 'MD5') ? $name : ucfirst(strtolower($name)));
$name = strtolower($name);
$headers[$name] = $value;
continue;
}
}
return $headers;
}
/**
* Marshal the URI from the $_SERVER array and headers
*
* @param array $server
* @param MessageInterface $request
* @return Uri
* @deprecated as of 0.7.0; use marshalUriFromServer() instead.
*/
public static function marshalUri(array $server, MessageInterface $request)
{
return self::marshalUriFromServer($server, $request->getHeaders());
}
/**
* Marshal the URI from the $_SERVER array and headers
*
* @param array $server
* @param array $headers
* @return Uri
*/
public static function marshalUriFromServer(array $server, array $headers)
{
$uri = new Uri('');
// URI scheme
$scheme = 'http';
$https = self::get('HTTPS', $server);
if (($https && 'off' !== $https)
|| self::getHeader('x-forwarded-proto', $headers, false) === 'https'
) {
$scheme = 'https';
}
if (! empty($scheme)) {
$uri = $uri->withScheme($scheme);
}
// Set the host
$accumulator = (object) ['host' => '', 'port' => null];
self::marshalHostAndPortFromHeaders($accumulator, $server, $headers);
$host = $accumulator->host;
$port = $accumulator->port;
if (! empty($host)) {
$uri = $uri->withHost($host);
if (! empty($port)) {
$uri = $uri->withPort($port);
}
}
// URI path
$path = self::marshalRequestUri($server);
$path = self::stripQueryString($path);
// URI query
$query = '';
if (isset($server['QUERY_STRING'])) {
$query = ltrim($server['QUERY_STRING'], '?');
}
return $uri
->withPath($path)
->withQuery($query);
}
/**
* Marshal the host and port from HTTP headers and/or the PHP environment
*
* @param array $server
* @param MessageInterface $request
* @return array Array with two members, host and port, at indices 0 and 1, respectively
* @deprecated as of 0.7.0; use marshalHostAndPortFromHeaders() instead.
*/
public static function marshalHostAndPort(stdClass $accumulator, array $server, MessageInterface $request)
{
return self::marshalHostAndPortFromHeaders($accumulator, $server, $request->getHeaders());
}
/**
* Marshal the host and port from HTTP headers and/or the PHP environment
*
* @param array $server
* @param array $headers
* @return array Array with two members, host and port, at indices 0 and 1, respectively
*/
public static function marshalHostAndPortFromHeaders(stdClass $accumulator, array $server, array $headers)
{
if (self::getHeader('host', $headers, false)) {
return self::marshalHostAndPortFromHeader($accumulator, self::getHeader('host', $headers));
}
if (! isset($server['SERVER_NAME'])) {
return;
}
$accumulator->host = $server['SERVER_NAME'];
if (isset($server['SERVER_PORT'])) {
$accumulator->port = (int) $server['SERVER_PORT'];
}
if (! isset($server['SERVER_ADDR']) || ! preg_match('/^\[[0-9a-fA-F\:]+\]$/', $accumulator->host)) {
return;
}
// Misinterpreted IPv6-Address
// Reported for Safari on Windows
self::marshalIpv6HostAndPort($accumulator, $server);
}
/**
* Detect the base URI for the request
*
* Looks at a variety of criteria in order to attempt to autodetect a base
* URI, including rewrite URIs, proxy URIs, etc.
*
* From ZF2's Zend\Http\PhpEnvironment\Request class
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*
* @param array $server
* @return string
*/
public static function marshalRequestUri(array $server)
{
// IIS7 with URL Rewrite: make sure we get the unencoded url
// (double slash problem).
$iisUrlRewritten = self::get('IIS_WasUrlRewritten', $server);
$unencodedUrl = self::get('UNENCODED_URL', $server, '');
if ('1' == $iisUrlRewritten && ! empty($unencodedUrl)) {
return $unencodedUrl;
}
$requestUri = self::get('REQUEST_URI', $server);
// Check this first so IIS will catch.
$httpXRewriteUrl = self::get('HTTP_X_REWRITE_URL', $server);
if ($httpXRewriteUrl !== null) {
$requestUri = $httpXRewriteUrl;
}
// Check for IIS 7.0 or later with ISAPI_Rewrite
$httpXOriginalUrl = self::get('HTTP_X_ORIGINAL_URL', $server);
if ($httpXOriginalUrl !== null) {
$requestUri = $httpXOriginalUrl;
}
if ($requestUri !== null) {
return preg_replace('#^[^/:]+://[^/]+#', '', $requestUri);
}
$origPathInfo = self::get('ORIG_PATH_INFO', $server);
if (empty($origPathInfo)) {
return '/';
}
return $origPathInfo;
}
/**
* Strip the query string from a path
*
* @param mixed $path
* @return void
*/
public static function stripQueryString($path)
{
if (($qpos = strpos($path, '?')) !== false) {
return substr($path, 0, $qpos);
}
return $path;
}
/**
* Marshal the host and port from the request header
*
* @param stdClass $accumulator
* @param string|array $host
* @return void
*/
private static function marshalHostAndPortFromHeader(stdClass $accumulator, $host)
{
if (is_array($host)) {
$host = implode(', ', $host);
}
$accumulator->host = $host;
$accumulator->port = null;
// works for regname, IPv4 & IPv6
if (preg_match('|\:(\d+)$|', $accumulator->host, $matches)) {
$accumulator->host = substr($accumulator->host, 0, -1 * (strlen($matches[1]) + 1));
$accumulator->port = (int) $matches[1];
}
}
/**
* Marshal host/port from misinterpreted IPv6 address
*
* @param stdClass $accumulator
* @param array $server
*/
private static function marshalIpv6HostAndPort(stdClass $accumulator, array $server)
{
$accumulator->host = '[' . $server['SERVER_ADDR'] . ']';
$accumulator->port = $accumulator->port ?: 80;
if ($accumulator->port . ']' == substr($accumulator->host, strrpos($accumulator->host, ':')+1)) {
// The last digit of the IPv6-Address has been taken as port
// Unset the port so the default port can be used
$accumulator->port = null;
}
}
}