comunic/3rdparty/RestServer/RestServer.php

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2016-11-19 11:08:12 +00:00
<?php
////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2009 Jacob Wright
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
////////////////////////////////////////////////////////////////////////////////
namespace Jacwright\RestServer;
require(__DIR__ . '/RestFormat.php');
require(__DIR__ . '/RestException.php');
use Exception;
use ReflectionClass;
use ReflectionObject;
use ReflectionMethod;
use DOMDocument;
/**
* Description of RestServer
*
* @author jacob
*/
class RestServer
{
//@todo add type hint
public $url;
public $method;
public $params;
public $format;
public $cacheDir = __DIR__;
public $realm;
public $mode;
public $root;
public $rootPath;
public $jsonAssoc = false;
protected $map = array();
protected $errorClasses = array();
protected $cached;
/**
* The constructor.
*
* @param string $mode The mode, either debug or production
*/
public function __construct($mode = 'debug', $realm = 'Rest Server')
{
$this->mode = $mode;
$this->realm = $realm;
// Set the root
$dir = str_replace('\\', '/', dirname(str_replace($_SERVER['DOCUMENT_ROOT'], '', $_SERVER['SCRIPT_FILENAME'])));
if ($dir == '.') {
$dir = '/';
} else {
// add a slash at the beginning and end
if (substr($dir, -1) != '/') $dir .= '/';
if (substr($dir, 0, 1) != '/') $dir = '/' . $dir;
}
$this->root = $dir;
}
public function __destruct()
{
if ($this->mode == 'production' && !$this->cached) {
if (function_exists('apc_store')) {
apc_store('urlMap', $this->map);
} else {
file_put_contents($this->cacheDir . '/urlMap.cache', serialize($this->map));
}
}
}
public function refreshCache()
{
$this->map = array();
$this->cached = false;
}
public function unauthorized($ask = false)
{
if ($ask) {
header("WWW-Authenticate: Basic realm=\"$this->realm\"");
}
throw new RestException(401, "You are not authorized to access this resource.");
}
public function handle()
{
$this->url = $this->getPath();
$this->method = $this->getMethod();
$this->format = $this->getFormat();
if ($this->method == 'PUT' || $this->method == 'POST' || $this->method == 'PATCH') {
$this->data = $this->getData();
}
list($obj, $method, $params, $this->params, $noAuth) = $this->findUrl();
if ($obj) {
if (is_string($obj)) {
if (class_exists($obj)) {
$obj = new $obj();
} else {
throw new Exception("Class $obj does not exist");
}
}
$obj->server = $this;
try {
if (method_exists($obj, 'init')) {
$obj->init();
}
if (!$noAuth && method_exists($obj, 'authorize')) {
if (!$obj->authorize()) {
$this->sendData($this->unauthorized(true)); //@todo unauthorized returns void
exit;
}
}
$result = call_user_func_array(array($obj, $method), $params);
if ($result !== null) {
$this->sendData($result);
}
} catch (RestException $e) {
$this->handleError($e->getCode(), $e->getMessage());
}
} else {
$this->handleError(404);
}
}
public function setRootPath($path)
{
$this->rootPath = '/'.trim($path, '/').'/';
}
public function setJsonAssoc($value)
{
$this->jsonAssoc = ($value === true);
}
public function addClass($class, $basePath = '')
{
$this->loadCache();
if (!$this->cached) {
if (is_string($class) && !class_exists($class)){
throw new Exception('Invalid method or class');
} elseif (!is_string($class) && !is_object($class)) {
throw new Exception('Invalid method or class; must be a classname or object');
}
if (substr($basePath, 0, 1) == '/') {
$basePath = substr($basePath, 1);
}
if ($basePath && substr($basePath, -1) != '/') {
$basePath .= '/';
}
$this->generateMap($class, $basePath);
}
}
public function addErrorClass($class)
{
$this->errorClasses[] = $class;
}
public function handleError($statusCode, $errorMessage = null)
{
$method = "handle$statusCode";
foreach ($this->errorClasses as $class) {
if (is_object($class)) {
$reflection = new ReflectionObject($class);
} elseif (class_exists($class)) {
$reflection = new ReflectionClass($class);
}
if (isset($reflection))
{
if ($reflection->hasMethod($method))
{
$obj = is_string($class) ? new $class() : $class;
$obj->$method();
return;
}
}
}
if (!$errorMessage)
{
$errorMessage = $this->codes[$statusCode];
}
$this->setStatus($statusCode);
$this->sendData(array('error' => array('code' => $statusCode, 'message' => $errorMessage)));
}
protected function loadCache()
{
if ($this->cached !== null) {
return;
}
$this->cached = false;
if ($this->mode == 'production') {
if (function_exists('apc_fetch')) {
$map = apc_fetch('urlMap');
} elseif (file_exists($this->cacheDir . '/urlMap.cache')) {
$map = unserialize(file_get_contents($this->cacheDir . '/urlMap.cache'));
}
if (isset($map) && is_array($map)) {
$this->map = $map;
$this->cached = true;
}
} else {
if (function_exists('apc_delete')) {
apc_delete('urlMap');
} else {
@unlink($this->cacheDir . '/urlMap.cache');
}
}
}
protected function findUrl()
{
$urls = $this->map[$this->method];
if (!$urls) return null;
foreach ($urls as $url => $call) {
$args = $call[2];
if (!strstr($url, '$')) {
if ($url == $this->url) {
if (isset($args['data'])) {
$params = array_fill(0, $args['data'] + 1, null);
$params[$args['data']] = $this->data; //@todo data is not a property of this class
$call[2] = $params;
} else {
$call[2] = array();
}
return $call;
}
} else {
$regex = preg_replace('/\\\\\$([\w\d]+)\.\.\./', '(?P<$1>.+)', str_replace('\.\.\.', '...', preg_quote($url)));
$regex = preg_replace('/\\\\\$([\w\d]+)/', '(?P<$1>[^\/]+)', $regex);
if (preg_match(":^$regex$:", urldecode($this->url), $matches)) {
$params = array();
$paramMap = array();
if (isset($args['data'])) {
$params[$args['data']] = $this->data;
}
foreach ($matches as $arg => $match) {
if (is_numeric($arg)) continue;
$paramMap[$arg] = $match;
if (isset($args[$arg])) {
$params[$args[$arg]] = $match;
}
}
ksort($params);
// make sure we have all the params we need
end($params);
$max = key($params);
for ($i = 0; $i < $max; $i++) {
if (!array_key_exists($i, $params)) {
$params[$i] = null;
}
}
ksort($params);
$call[2] = $params;
$call[3] = $paramMap;
return $call;
}
}
}
}
protected function generateMap($class, $basePath)
{
if (is_object($class)) {
$reflection = new ReflectionObject($class);
} elseif (class_exists($class)) {
$reflection = new ReflectionClass($class);
}
$methods = $reflection->getMethods(ReflectionMethod::IS_PUBLIC); //@todo $reflection might not be instantiated
foreach ($methods as $method) {
$doc = $method->getDocComment();
$noAuth = strpos($doc, '@noAuth') !== false;
if (preg_match_all('/@url[ \t]+(GET|POST|PUT|PATCH|DELETE|HEAD|OPTIONS)[ \t]+\/?(\S*)/s', $doc, $matches, PREG_SET_ORDER)) {
$params = $method->getParameters();
foreach ($matches as $match) {
$httpMethod = $match[1];
$url = $basePath . $match[2];
if ($url && $url[strlen($url) - 1] == '/') {
$url = substr($url, 0, -1);
}
$call = array($class, $method->getName());
$args = array();
foreach ($params as $param) {
$args[$param->getName()] = $param->getPosition();
}
$call[] = $args;
$call[] = null;
$call[] = $noAuth;
$this->map[$httpMethod][$url] = $call;
}
}
}
}
public function getPath()
{
$path = preg_replace('/\?.*$/', '', $_SERVER['REQUEST_URI']);
// remove root from path
if ($this->root) $path = preg_replace('/^' . preg_quote($this->root, '/') . '/', '', $path);
// remove trailing format definition, like /controller/action.json -> /controller/action
$path = preg_replace('/\.(\w+)$/i', '', $path);
// remove root path from path, like /root/path/api -> /api
if ($this->rootPath) $path = str_replace($this->rootPath, '', $path);
return $path;
}
public function getMethod()
{
$method = $_SERVER['REQUEST_METHOD'];
$override = isset($_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE']) ? $_SERVER['HTTP_X_HTTP_METHOD_OVERRIDE'] : (isset($_GET['method']) ? $_GET['method'] : '');
if ($method == 'POST' && strtoupper($override) == 'PUT') {
$method = 'PUT';
} elseif ($method == 'POST' && strtoupper($override) == 'DELETE') {
$method = 'DELETE';
} elseif ($method == 'POST' && strtoupper($override) == 'PATCH') {
$method = 'PATCH';
}
return $method;
}
public function getFormat()
{
$format = RestFormat::PLAIN;
$accept_mod = null;
if(isset($_SERVER["HTTP_ACCEPT"])) {
$accept_mod = preg_replace('/\s+/i', '', $_SERVER['HTTP_ACCEPT']); // ensures that exploding the HTTP_ACCEPT string does not get confused by whitespaces
}
$accept = explode(',', $accept_mod);
$override = '';
if (isset($_REQUEST['format']) || isset($_SERVER['HTTP_FORMAT'])) {
// give GET/POST precedence over HTTP request headers
$override = isset($_SERVER['HTTP_FORMAT']) ? $_SERVER['HTTP_FORMAT'] : '';
$override = isset($_REQUEST['format']) ? $_REQUEST['format'] : $override;
$override = trim($override);
}
// Check for trailing dot-format syntax like /controller/action.format -> action.json
if(preg_match('/\.(\w+)$/i', strtok($_SERVER["REQUEST_URI"],'?'), $matches)) {
$override = $matches[1];
}
// Give GET parameters precedence before all other options to alter the format
$override = isset($_GET['format']) ? $_GET['format'] : $override;
if (isset(RestFormat::$formats[$override])) {
$format = RestFormat::$formats[$override];
} elseif (in_array(RestFormat::JSON, $accept)) {
$format = RestFormat::JSON;
}
return $format;
}
public function getData()
{
$data = file_get_contents('php://input');
$data = json_decode($data, $this->jsonAssoc);
return $data;
}
public function sendData($data)
{
header("Cache-Control: no-cache, must-revalidate");
header("Expires: 0");
header('Content-Type: ' . $this->format);
if ($this->format == RestFormat::XML) {
if (is_object($data) && method_exists($data, '__keepOut')) {
$data = clone $data;
foreach ($data->__keepOut() as $prop) {
unset($data->$prop);
}
}
$this->xml_encode($data);
} else {
if (is_object($data) && method_exists($data, '__keepOut')) {
$data = clone $data;
foreach ($data->__keepOut() as $prop) {
unset($data->$prop);
}
}
$options = 0;
if ($this->mode == 'debug') {
$options = JSON_PRETTY_PRINT;
}
$options = $options | JSON_UNESCAPED_UNICODE;
echo json_encode($data, $options);
}
}
public function setStatus($code)
{
if (function_exists('http_response_code')) {
http_response_code($code);
} else {
$protocol = $_SERVER['SERVER_PROTOCOL'] ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0';
$code .= ' ' . $this->codes[strval($code)];
header("$protocol $code");
}
}
private function xml_encode($mixed, $domElement=null, $DOMDocument=null) { //@todo add type hint for $domElement and $DOMDocument
if (is_null($DOMDocument)) {
$DOMDocument =new DOMDocument;
$DOMDocument->formatOutput = true;
$this->xml_encode($mixed, $DOMDocument, $DOMDocument);
echo $DOMDocument->saveXML();
}
else {
if (is_array($mixed)) {
foreach ($mixed as $index => $mixedElement) {
if (is_int($index)) {
if ($index === 0) {
$node = $domElement;
}
else {
$node = $DOMDocument->createElement($domElement->tagName);
$domElement->parentNode->appendChild($node);
}
}
else {
$plural = $DOMDocument->createElement($index);
$domElement->appendChild($plural);
$node = $plural;
if (!(rtrim($index, 's') === $index)) {
$singular = $DOMDocument->createElement(rtrim($index, 's'));
$plural->appendChild($singular);
$node = $singular;
}
}
$this->xml_encode($mixedElement, $node, $DOMDocument);
}
}
else {
$domElement->appendChild($DOMDocument->createTextNode($mixed));
}
}
}
private $codes = array(
'100' => 'Continue',
'200' => 'OK',
'201' => 'Created',
'202' => 'Accepted',
'203' => 'Non-Authoritative Information',
'204' => 'No Content',
'205' => 'Reset Content',
'206' => 'Partial Content',
'300' => 'Multiple Choices',
'301' => 'Moved Permanently',
'302' => 'Found',
'303' => 'See Other',
'304' => 'Not Modified',
'305' => 'Use Proxy',
'307' => 'Temporary Redirect',
'400' => 'Bad Request',
'401' => 'Unauthorized',
'402' => 'Payment Required',
'403' => 'Forbidden',
'404' => 'Not Found',
'405' => 'Method Not Allowed',
'406' => 'Not Acceptable',
'409' => 'Conflict',
'410' => 'Gone',
'411' => 'Length Required',
'412' => 'Precondition Failed',
'413' => 'Request Entity Too Large',
'414' => 'Request-URI Too Long',
'415' => 'Unsupported Media Type',
'416' => 'Requested Range Not Satisfiable',
'417' => 'Expectation Failed',
'500' => 'Internal Server Error',
'501' => 'Not Implemented',
'503' => 'Service Unavailable'
);
}