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<?php |
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namespace SilverStripe\Control; |
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use SilverStripe\Core\Environment; |
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class HTTPRequestBuilder |
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{ |
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/** |
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* Create HTTPRequest instance from the current environment variables. |
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* May throw errors if request is invalid. |
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* |
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* @throws HTTPResponse_Exception |
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* @return HTTPRequest |
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*/ |
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public static function createFromEnvironment() |
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{ |
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// Clean and update live global variables |
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$variables = static::cleanEnvironment(Environment::getVariables()); |
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Environment::setVariables($variables); // Currently necessary for SSViewer, etc to work |
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// Health-check prior to creating environment |
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return static::createFromVariables($variables, @file_get_contents('php://input')); |
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} |
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/** |
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* Build HTTPRequest from given variables |
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* |
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* @param array $variables |
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* @param string $input Request body |
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* @param string|null $url Provide specific url (relative to base) |
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* @return HTTPRequest |
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*/ |
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public static function createFromVariables(array $variables, $input, $url = null) |
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{ |
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// Infer URL from REQUEST_URI unless explicitly provided |
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if (!isset($url)) { |
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// Remove query parameters (they're retained separately through $server['_GET'] |
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$url = parse_url($variables['_SERVER']['REQUEST_URI'], PHP_URL_PATH); |
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// Remove base folders from the URL if webroot is hosted in a subfolder |
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if (substr(strtolower((string) $url), 0, strlen(BASE_URL)) === strtolower(BASE_URL)) { |
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$url = substr((string) $url, strlen(BASE_URL)); |
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} |
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} |
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// Build request |
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$request = new HTTPRequest( |
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$variables['_SERVER']['REQUEST_METHOD'], |
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$url, |
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$variables['_GET'], |
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$variables['_POST'], |
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$input |
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); |
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// Set the scheme to HTTPS if needed |
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if ((!empty($variables['_SERVER']['HTTPS']) && $variables['_SERVER']['HTTPS'] != 'off') |
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|| isset($variables['_SERVER']['SSL'])) { |
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$request->setScheme('https'); |
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} |
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// Set the client IP |
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if (!empty($variables['_SERVER']['REMOTE_ADDR'])) { |
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$request->setIP($variables['_SERVER']['REMOTE_ADDR']); |
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} |
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// Add headers |
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$headers = static::extractRequestHeaders($variables['_SERVER']); |
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foreach ($headers as $header => $value) { |
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$request->addHeader($header, $value); |
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} |
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// Initiate an empty session - doesn't initialize an actual PHP session (see HTTPApplication) |
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$session = new Session(isset($variables['_SESSION']) ? $variables['_SESSION'] : null); |
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$request->setSession($session); |
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return $request; |
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} |
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/** |
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* Takes a $_SERVER data array and extracts HTTP request headers. |
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* |
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* @param array $server |
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* |
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* @return array |
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*/ |
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public static function extractRequestHeaders(array $server) |
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{ |
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$headers = []; |
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foreach ($server as $key => $value) { |
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if (substr((string) $key, 0, 5) == 'HTTP_') { |
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$key = substr((string) $key, 5); |
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$key = strtolower((string) str_replace('_', ' ', $key ?: '')); |
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$key = str_replace(' ', '-', ucwords((string) $key)); |
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$headers[$key] = $value; |
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} |
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} |
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if (isset($server['CONTENT_TYPE'])) { |
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$headers['Content-Type'] = $server['CONTENT_TYPE']; |
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} |
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if (isset($server['CONTENT_LENGTH'])) { |
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$headers['Content-Length'] = $server['CONTENT_LENGTH']; |
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} |
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// Enable HTTP Basic authentication workaround for PHP running in CGI mode with Apache |
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// Depending on server configuration the auth header may be in HTTP_AUTHORIZATION or |
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// REDIRECT_HTTP_AUTHORIZATION |
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$authHeader = null; |
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if (isset($headers['Authorization'])) { |
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$authHeader = $headers['Authorization']; |
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} elseif (isset($server['REDIRECT_HTTP_AUTHORIZATION'])) { |
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$authHeader = $server['REDIRECT_HTTP_AUTHORIZATION']; |
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} |
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// Ensure basic auth is available via headers |
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if (isset($server['PHP_AUTH_USER']) && isset($server['PHP_AUTH_PW'])) { |
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// Shift PHP_AUTH_* into headers so they are available via request |
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$headers['PHP_AUTH_USER'] = $server['PHP_AUTH_USER']; |
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$headers['PHP_AUTH_PW'] = $server['PHP_AUTH_PW']; |
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} elseif ($authHeader && preg_match('/Basic\s+(?<token>.*)$/i', (string) $authHeader, $matches)) { |
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list($name, $password) = explode(':', (string) base64_decode($matches['token'])); |
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$headers['PHP_AUTH_USER'] = $name; |
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$headers['PHP_AUTH_PW'] = $password; |
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} |
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return $headers; |
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} |
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/** |
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* Clean up HTTP global vars for $_GET / $_REQUEST prior to bootstrapping |
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* |
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* @param array $variables |
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* @return array Cleaned variables |
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*/ |
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public static function cleanEnvironment(array $variables) |
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{ |
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// Merge $_FILES into $_POST |
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$variables['_POST'] = array_merge((array)$variables['_POST'], (array)$variables['_FILES']); |
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// Merge $_POST, $_GET, and $_COOKIE into $_REQUEST |
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$variables['_REQUEST'] = array_merge( |
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(array)$variables['_GET'], |
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(array)$variables['_POST'], |
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(array)$variables['_COOKIE'] |
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); |
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return $variables; |
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} |
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} |
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silverstripe /
silverstripe-framework
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