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2166 lines
72 KiB
2166 lines
72 KiB
<?php
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defined('BASEPATH') OR exit('No direct script access allowed');
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/**
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* CodeIgniter Rest Controller
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* A fully RESTful server implementation for CodeIgniter using one library, one config file and one controller.
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category Libraries
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* @author Phil Sturgeon, Chris Kacerguis
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* @license MIT
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* @link https://github.com/chriskacerguis/codeigniter-restserver
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* @version 3.0.0
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*/
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abstract class REST_Controller extends CI_Controller {
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// Note: Only the widely used HTTP status codes are documented
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// Informational
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const HTTP_CONTINUE = 100;
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const HTTP_SWITCHING_PROTOCOLS = 101;
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const HTTP_PROCESSING = 102; // RFC2518
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// Success
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/**
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* The request has succeeded
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*/
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const HTTP_OK = 200;
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/**
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* The server successfully created a new resource
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*/
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const HTTP_CREATED = 201;
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const HTTP_ACCEPTED = 202;
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const HTTP_NON_AUTHORITATIVE_INFORMATION = 203;
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/**
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* The server successfully processed the request, though no content is returned
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*/
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const HTTP_NO_CONTENT = 204;
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const HTTP_RESET_CONTENT = 205;
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const HTTP_PARTIAL_CONTENT = 206;
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const HTTP_MULTI_STATUS = 207; // RFC4918
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const HTTP_ALREADY_REPORTED = 208; // RFC5842
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const HTTP_IM_USED = 226; // RFC3229
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// Redirection
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const HTTP_MULTIPLE_CHOICES = 300;
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const HTTP_MOVED_PERMANENTLY = 301;
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const HTTP_FOUND = 302;
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const HTTP_SEE_OTHER = 303;
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/**
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* The resource has not been modified since the last request
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*/
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const HTTP_NOT_MODIFIED = 304;
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const HTTP_USE_PROXY = 305;
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const HTTP_RESERVED = 306;
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const HTTP_TEMPORARY_REDIRECT = 307;
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const HTTP_PERMANENTLY_REDIRECT = 308; // RFC7238
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// Client Error
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/**
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* The request cannot be fulfilled due to multiple errors
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*/
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const HTTP_BAD_REQUEST = 400;
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/**
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* The user is unauthorized to access the requested resource
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*/
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const HTTP_UNAUTHORIZED = 401;
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const HTTP_PAYMENT_REQUIRED = 402;
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/**
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* The requested resource is unavailable at this present time
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*/
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const HTTP_FORBIDDEN = 403;
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/**
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* The requested resource could not be found
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*
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* Note: This is sometimes used to mask if there was an UNAUTHORIZED (401) or
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* FORBIDDEN (403) error, for security reasons
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*/
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const HTTP_NOT_FOUND = 404;
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/**
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* The request method is not supported by the following resource
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*/
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const HTTP_METHOD_NOT_ALLOWED = 405;
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/**
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* The request was not acceptable
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*/
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const HTTP_NOT_ACCEPTABLE = 406;
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const HTTP_PROXY_AUTHENTICATION_REQUIRED = 407;
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const HTTP_REQUEST_TIMEOUT = 408;
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/**
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* The request could not be completed due to a conflict with the current state
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* of the resource
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*/
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const HTTP_CONFLICT = 409;
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const HTTP_GONE = 410;
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const HTTP_LENGTH_REQUIRED = 411;
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const HTTP_PRECONDITION_FAILED = 412;
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const HTTP_REQUEST_ENTITY_TOO_LARGE = 413;
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const HTTP_REQUEST_URI_TOO_LONG = 414;
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const HTTP_UNSUPPORTED_MEDIA_TYPE = 415;
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const HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
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const HTTP_EXPECTATION_FAILED = 417;
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const HTTP_I_AM_A_TEAPOT = 418; // RFC2324
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const HTTP_UNPROCESSABLE_ENTITY = 422; // RFC4918
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const HTTP_LOCKED = 423; // RFC4918
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const HTTP_FAILED_DEPENDENCY = 424; // RFC4918
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const HTTP_RESERVED_FOR_WEBDAV_ADVANCED_COLLECTIONS_EXPIRED_PROPOSAL = 425; // RFC2817
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const HTTP_UPGRADE_REQUIRED = 426; // RFC2817
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const HTTP_PRECONDITION_REQUIRED = 428; // RFC6585
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const HTTP_TOO_MANY_REQUESTS = 429; // RFC6585
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const HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE = 431; // RFC6585
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// Server Error
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/**
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* The server encountered an unexpected error
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*
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* Note: This is a generic error message when no specific message
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* is suitable
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*/
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const HTTP_INTERNAL_SERVER_ERROR = 500;
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/**
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* The server does not recognise the request method
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*/
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const HTTP_NOT_IMPLEMENTED = 501;
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const HTTP_BAD_GATEWAY = 502;
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const HTTP_SERVICE_UNAVAILABLE = 503;
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const HTTP_GATEWAY_TIMEOUT = 504;
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const HTTP_VERSION_NOT_SUPPORTED = 505;
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const HTTP_VARIANT_ALSO_NEGOTIATES_EXPERIMENTAL = 506; // RFC2295
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const HTTP_INSUFFICIENT_STORAGE = 507; // RFC4918
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const HTTP_LOOP_DETECTED = 508; // RFC5842
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const HTTP_NOT_EXTENDED = 510; // RFC2774
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const HTTP_NETWORK_AUTHENTICATION_REQUIRED = 511;
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/**
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* This defines the rest format
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* Must be overridden it in a controller so that it is set
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*
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* @var string|NULL
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*/
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protected $rest_format = NULL;
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/**
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* Defines the list of method properties such as limit, log and level
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*
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* @var array
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*/
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protected $methods = [];
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/**
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* List of allowed HTTP methods
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*
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* @var array
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*/
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protected $allowed_http_methods = ['get', 'delete', 'post', 'put', 'options', 'patch', 'head'];
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/**
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* Contains details about the request
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* Fields: body, format, method, ssl
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* Note: This is a dynamic object (stdClass)
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*
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* @var object
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*/
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protected $request = NULL;
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/**
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* Contains details about the response
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* Fields: format, lang
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* Note: This is a dynamic object (stdClass)
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*
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* @var object
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*/
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protected $response = NULL;
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/**
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* Contains details about the REST API
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* Fields: db, ignore_limits, key, level, user_id
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* Note: This is a dynamic object (stdClass)
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*
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* @var object
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*/
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protected $rest = NULL;
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/**
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* The arguments for the GET request method
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*
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* @var array
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*/
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protected $_get_args = [];
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/**
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* The arguments for the POST request method
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*
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* @var array
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*/
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protected $_post_args = [];
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/**
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* The arguments for the PUT request method
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*
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* @var array
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*/
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protected $_put_args = [];
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/**
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* The arguments for the DELETE request method
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*
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* @var array
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*/
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protected $_delete_args = [];
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/**
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* The arguments for the PATCH request method
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*
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* @var array
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*/
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protected $_patch_args = [];
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/**
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* The arguments for the HEAD request method
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*
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* @var array
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*/
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protected $_head_args = [];
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/**
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* The arguments for the OPTIONS request method
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*
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* @var array
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*/
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protected $_options_args = [];
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/**
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* The arguments for the query parameters
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*
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* @var array
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*/
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protected $_query_args = [];
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/**
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* The arguments from GET, POST, PUT, DELETE, PATCH, HEAD and OPTIONS request methods combined
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*
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* @var array
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*/
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protected $_args = [];
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/**
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* The insert_id of the log entry (if we have one)
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*
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* @var string
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*/
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protected $_insert_id = '';
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/**
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* If the request is allowed based on the API key provided
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*
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* @var bool
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*/
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protected $_allow = TRUE;
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/**
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* The LDAP Distinguished Name of the User post authentication
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*
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* @var string
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*/
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protected $_user_ldap_dn = '';
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/**
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* The start of the response time from the server
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*
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* @var string
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*/
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protected $_start_rtime = '';
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/**
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* The end of the response time from the server
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*
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* @var string
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*/
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protected $_end_rtime = '';
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/**
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* List all supported methods, the first will be the default format
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*
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* @var array
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*/
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protected $_supported_formats = [
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'json' => 'application/json',
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'array' => 'application/json',
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'csv' => 'application/csv',
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'html' => 'text/html',
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'jsonp' => 'application/javascript',
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'php' => 'text/plain',
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'serialized' => 'application/vnd.php.serialized',
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'xml' => 'application/xml'
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];
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/**
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* Information about the current API user
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*
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* @var object
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*/
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protected $_apiuser;
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/**
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* Enable XSS flag
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* Determines whether the XSS filter is always active when
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* GET, OPTIONS, HEAD, POST, PUT, DELETE and PATCH data is encountered
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* Set automatically based on config setting
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*
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* @var bool
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*/
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protected $_enable_xss = FALSE;
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/**
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* HTTP status codes and their respective description
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* Note: Only the widely used HTTP status codes are used
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*
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* @var array
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* @link http://www.restapitutorial.com/httpstatuscodes.html
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*/
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protected $http_status_codes = [
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self::HTTP_OK => 'OK',
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self::HTTP_CREATED => 'CREATED',
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self::HTTP_NO_CONTENT => 'NO CONTENT',
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self::HTTP_NOT_MODIFIED => 'NOT MODIFIED',
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self::HTTP_BAD_REQUEST => 'BAD REQUEST',
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self::HTTP_UNAUTHORIZED => 'UNAUTHORIZED',
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self::HTTP_FORBIDDEN => 'FORBIDDEN',
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self::HTTP_NOT_FOUND => 'NOT FOUND',
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self::HTTP_METHOD_NOT_ALLOWED => 'METHOD NOT ALLOWED',
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self::HTTP_NOT_ACCEPTABLE => 'NOT ACCEPTABLE',
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self::HTTP_CONFLICT => 'CONFLICT',
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self::HTTP_INTERNAL_SERVER_ERROR => 'INTERNAL SERVER ERROR',
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self::HTTP_NOT_IMPLEMENTED => 'NOT IMPLEMENTED'
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];
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/**
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* Extend this function to apply additional checking early on in the process
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*
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* @access protected
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* @return void
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*/
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protected function early_checks()
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{
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}
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/**
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* Constructor for the REST API
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*
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* @access public
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* @param string $config Configuration filename minus the file extension
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* e.g: my_rest.php is passed as 'my_rest'
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* @return void
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*/
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public function __construct($config = 'rest')
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{
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parent::__construct();
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// Disable XML Entity (security vulnerability)
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libxml_disable_entity_loader(TRUE);
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// Check to see if PHP is equal to or greater than 5.4.x
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if (is_php('5.4') === FALSE)
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{
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// CodeIgniter 3 is recommended for v5.4 or above
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throw new Exception('Using PHP v' . PHP_VERSION . ', though PHP v5.4 or greater is required');
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}
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// Check to see if this is CI 3.x
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if (explode('.', CI_VERSION, 2)[0] < 3)
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{
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throw new Exception('REST Server requires CodeIgniter 3.x');
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}
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// Set the default value of global xss filtering. Same approach as CodeIgniter 3
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$this->_enable_xss = ($this->config->item('global_xss_filtering') === TRUE);
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// Don't try to parse template variables like {elapsed_time} and {memory_usage}
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// when output is displayed for not damaging data accidentally
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$this->output->parse_exec_vars = FALSE;
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// Start the timer for how long the request takes
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$this->_start_rtime = microtime(TRUE);
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// Load the rest.php configuration file
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$this->load->config($config);
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// At present the library is bundled with REST_Controller 2.5+, but will eventually be part of CodeIgniter (no citation)
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$this->load->library('format');
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// Determine supported output formats from configuration
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$supported_formats = $this->config->item('rest_supported_formats');
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// Validate the configuration setting output formats
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if (empty($supported_formats))
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{
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$supported_formats = [];
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}
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if (!is_array($supported_formats))
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{
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$supported_formats = [$supported_formats];
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}
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// Add silently the default output format if it is missing
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$default_format = $this->_get_default_output_format();
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if (!in_array($default_format, $supported_formats))
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{
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$supported_formats[] = $default_format;
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}
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// Now update $this->_supported_formats
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$this->_supported_formats = array_intersect_key($this->_supported_formats, array_flip($supported_formats));
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// Get the language
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$language = $this->config->item('rest_language');
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if ($language === NULL)
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{
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$language = 'english';
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}
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// Load the language file
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$this->lang->load('rest_controller', $language);
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// Initialise the response, request and rest objects
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$this->request = new stdClass();
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$this->response = new stdClass();
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$this->rest = new stdClass();
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// Check to see if the current IP address is blacklisted
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if ($this->config->item('rest_ip_blacklist_enabled') === TRUE)
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{
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$this->_check_blacklist_auth();
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}
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// Determine whether the connection is HTTPS
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$this->request->ssl = is_https();
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// How is this request being made? GET, POST, PATCH, DELETE, INSERT, PUT, HEAD or OPTIONS
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$this->request->method = $this->_detect_method();
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// Create an argument container if it doesn't exist e.g. _get_args
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if (isset($this->{'_' . $this->request->method . '_args'}) === FALSE)
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{
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$this->{'_' . $this->request->method . '_args'} = [];
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}
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// Set up the query parameters
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$this->_parse_query();
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// Set up the GET variables
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$this->_get_args = array_merge($this->_get_args, $this->uri->ruri_to_assoc());
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// Try to find a format for the request (means we have a request body)
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$this->request->format = $this->_detect_input_format();
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// Not all methods have a body attached with them
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$this->request->body = NULL;
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$this->{'_parse_' . $this->request->method}();
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// Now we know all about our request, let's try and parse the body if it exists
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if ($this->request->format && $this->request->body)
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{
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$this->request->body = $this->format->factory($this->request->body, $this->request->format)->to_array();
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// Assign payload arguments to proper method container
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$this->{'_' . $this->request->method . '_args'} = $this->request->body;
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}
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// Merge both for one mega-args variable
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$this->_args = array_merge(
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$this->_get_args,
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$this->_options_args,
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$this->_patch_args,
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$this->_head_args,
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$this->_put_args,
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$this->_post_args,
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$this->_delete_args,
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$this->{'_' . $this->request->method . '_args'}
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);
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// Which format should the data be returned in?
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$this->response->format = $this->_detect_output_format();
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// Which language should the data be returned in?
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$this->response->lang = $this->_detect_lang();
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// Extend this function to apply additional checking early on in the process
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$this->early_checks();
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// Load DB if its enabled
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if ($this->config->item('rest_database_group') && ($this->config->item('rest_enable_keys') || $this->config->item('rest_enable_logging')))
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{
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$this->rest->db = $this->load->database($this->config->item('rest_database_group'), TRUE);
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}
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// Use whatever database is in use (isset returns FALSE)
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elseif (property_exists($this, 'db'))
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{
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$this->rest->db = $this->db;
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}
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// Check if there is a specific auth type for the current class/method
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// _auth_override_check could exit so we need $this->rest->db initialized before
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$this->auth_override = $this->_auth_override_check();
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// Checking for keys? GET TO WorK!
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// Skip keys test for $config['auth_override_class_method']['class'['method'] = 'none'
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if ($this->config->item('rest_enable_keys') && $this->auth_override !== TRUE)
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{
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$this->_allow = $this->_detect_api_key();
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}
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// Only allow ajax requests
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if ($this->input->is_ajax_request() === FALSE && $this->config->item('rest_ajax_only'))
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{
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// Display an error response
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$this->response([
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$this->config->item('rest_status_field_name') => FALSE,
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$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_ajax_only')
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], self::HTTP_NOT_ACCEPTABLE);
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}
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// When there is no specific override for the current class/method, use the default auth value set in the config
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if ($this->auth_override === FALSE && !($this->config->item('rest_enable_keys') && $this->_allow === TRUE) || ($this->config->item('allow_auth_and_keys') === TRUE && $this->_allow === TRUE))
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{
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$rest_auth = strtolower($this->config->item('rest_auth'));
|
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switch ($rest_auth)
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{
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case 'basic':
|
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$this->_prepare_basic_auth();
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break;
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case 'digest':
|
|
$this->_prepare_digest_auth();
|
|
break;
|
|
case 'session':
|
|
$this->_check_php_session();
|
|
break;
|
|
}
|
|
if ($this->config->item('rest_ip_whitelist_enabled') === TRUE)
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Deconstructor
|
|
*
|
|
* @author Chris Kacerguis
|
|
* @access public
|
|
* @return void
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
// Get the current timestamp
|
|
$this->_end_rtime = microtime(TRUE);
|
|
|
|
// Log the loading time to the log table
|
|
if ($this->config->item('rest_enable_logging') === TRUE)
|
|
{
|
|
$this->_log_access_time();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Requests are not made to methods directly, the request will be for
|
|
* an "object". This simply maps the object and method to the correct
|
|
* Controller method
|
|
*
|
|
* @access public
|
|
* @param string $object_called
|
|
* @param array $arguments The arguments passed to the controller method
|
|
*/
|
|
public function _remap($object_called, $arguments = [])
|
|
{
|
|
// Should we answer if not over SSL?
|
|
if ($this->config->item('force_https') && $this->request->ssl === FALSE)
|
|
{
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_unsupported')
|
|
], self::HTTP_FORBIDDEN);
|
|
}
|
|
|
|
// Remove the supported format from the function name e.g. index.json => index
|
|
$object_called = preg_replace('/^(.*)\.(?:' . implode('|', array_keys($this->_supported_formats)) . ')$/', '$1', $object_called);
|
|
|
|
$controller_method = $object_called . '_' . $this->request->method;
|
|
|
|
// Do we want to log this method (if allowed by config)?
|
|
$log_method = !(isset($this->methods[$controller_method]['log']) && $this->methods[$controller_method]['log'] === FALSE);
|
|
|
|
// Use keys for this method?
|
|
$use_key = !(isset($this->methods[$controller_method]['key']) && $this->methods[$controller_method]['key'] === FALSE);
|
|
|
|
// They provided a key, but it wasn't valid, so get them out of here
|
|
if ($this->config->item('rest_enable_keys') && $use_key && $this->_allow === FALSE)
|
|
{
|
|
if ($this->config->item('rest_enable_logging') && $log_method)
|
|
{
|
|
$this->_log_request();
|
|
}
|
|
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => sprintf($this->lang->line('text_rest_invalid_api_key'), $this->rest->key)
|
|
], self::HTTP_FORBIDDEN);
|
|
}
|
|
|
|
// Check to see if this key has access to the requested controller
|
|
if ($this->config->item('rest_enable_keys') && $use_key && empty($this->rest->key) === FALSE && $this->_check_access() === FALSE)
|
|
{
|
|
if ($this->config->item('rest_enable_logging') && $log_method)
|
|
{
|
|
$this->_log_request();
|
|
}
|
|
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_api_key_unauthorized')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
|
|
// Sure it exists, but can they do anything with it?
|
|
if (method_exists($this, $controller_method) === FALSE)
|
|
{
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_unknown_method')
|
|
], self::HTTP_NOT_FOUND);
|
|
}
|
|
|
|
// Doing key related stuff? Can only do it if they have a key right?
|
|
if ($this->config->item('rest_enable_keys') && empty($this->rest->key) === FALSE)
|
|
{
|
|
// Check the limit
|
|
if ($this->config->item('rest_enable_limits') && $this->_check_limit($controller_method) === FALSE)
|
|
{
|
|
$response = [$this->config->item('rest_status_field_name') => FALSE, $this->config->item('rest_message_field_name') => $this->lang->line('text_rest_api_key_time_limit')];
|
|
$this->response($response, self::HTTP_UNAUTHORIZED);
|
|
}
|
|
|
|
// If no level is set use 0, they probably aren't using permissions
|
|
$level = isset($this->methods[$controller_method]['level']) ? $this->methods[$controller_method]['level'] : 0;
|
|
|
|
// If no level is set, or it is lower than/equal to the key's level
|
|
$authorized = $level <= $this->rest->level;
|
|
|
|
// IM TELLIN!
|
|
if ($this->config->item('rest_enable_logging') && $log_method)
|
|
{
|
|
$this->_log_request($authorized);
|
|
}
|
|
|
|
// They don't have good enough perms
|
|
$response = [$this->config->item('rest_status_field_name') => FALSE, $this->config->item('rest_message_field_name') => $this->lang->line('text_rest_api_key_permissions')];
|
|
$authorized || $this->response($response, self::HTTP_UNAUTHORIZED);
|
|
}
|
|
|
|
// No key stuff, but record that stuff is happening
|
|
elseif ($this->config->item('rest_enable_logging') && $log_method)
|
|
{
|
|
$this->_log_request($authorized = TRUE);
|
|
}
|
|
|
|
// Call the controller method and passed arguments
|
|
try
|
|
{
|
|
call_user_func_array([$this, $controller_method], $arguments);
|
|
}
|
|
catch (Exception $ex)
|
|
{
|
|
// If the method doesn't exist, then the error will be caught and an error response shown
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => [
|
|
'classname' => get_class($ex),
|
|
'message' => $ex->getMessage()
|
|
]
|
|
], self::HTTP_INTERNAL_SERVER_ERROR);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes mixed data and optionally a status code, then creates the response
|
|
*
|
|
* @access public
|
|
* @param array|NULL $data Data to output to the user
|
|
* @param int|NULL $http_code HTTP status code
|
|
* @param bool $continue TRUE to flush the response to the client and continue
|
|
* running the script; otherwise, exit
|
|
*/
|
|
public function response($data = NULL, $http_code = NULL, $continue = FALSE)
|
|
{
|
|
// If the HTTP status is not NULL, then cast as an integer
|
|
if ($http_code !== NULL)
|
|
{
|
|
// So as to be safe later on in the process
|
|
$http_code = (int) $http_code;
|
|
}
|
|
|
|
// Set the output as NULL by default
|
|
$output = NULL;
|
|
|
|
// If data is NULL and no HTTP status code provided, then display, error and exit
|
|
if ($data === NULL && $http_code === NULL)
|
|
{
|
|
$http_code = self::HTTP_NOT_FOUND;
|
|
}
|
|
|
|
// If data is not NULL and a HTTP status code provided, then continue
|
|
elseif ($data !== NULL)
|
|
{
|
|
// If the format method exists, call and return the output in that format
|
|
if (method_exists($this->format, 'to_' . $this->response->format))
|
|
{
|
|
// Set the format header
|
|
$this->output->set_content_type($this->_supported_formats[$this->response->format], strtolower($this->config->item('charset')));
|
|
$output = $this->format->factory($data)->{'to_' . $this->response->format}();
|
|
|
|
// An array must be parsed as a string, so as not to cause an array to string error
|
|
// Json is the most appropriate form for such a datatype
|
|
if ($this->response->format === 'array')
|
|
{
|
|
$output = $this->format->factory($output)->{'to_json'}();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// If an array or object, then parse as a json, so as to be a 'string'
|
|
if (is_array($data) || is_object($data))
|
|
{
|
|
$data = $this->format->factory($data)->{'to_json'}();
|
|
}
|
|
|
|
// Format is not supported, so output the raw data as a string
|
|
$output = $data;
|
|
}
|
|
}
|
|
|
|
// If not greater than zero, then set the HTTP status code as 200 by default
|
|
// Though perhaps 500 should be set instead, for the developer not passing a
|
|
// correct HTTP status code
|
|
$http_code > 0 || $http_code = self::HTTP_OK;
|
|
|
|
$this->output->set_status_header($http_code);
|
|
|
|
// JC: Log response code only if rest logging enabled
|
|
if ($this->config->item('rest_enable_logging') === TRUE)
|
|
{
|
|
$this->_log_response_code($http_code);
|
|
}
|
|
|
|
// Output the data
|
|
$this->output->set_output($output);
|
|
|
|
if ($continue === FALSE)
|
|
{
|
|
// Display the data and exit execution
|
|
$this->output->_display();
|
|
exit;
|
|
}
|
|
|
|
// Otherwise dump the output automatically
|
|
}
|
|
|
|
/**
|
|
* Takes mixed data and optionally a status code, then creates the response
|
|
* within the buffers of the Output class. The response is sent to the client
|
|
* lately by the framework, after the current controller's method termination.
|
|
* All the hooks after the controller's method termination are executable
|
|
*
|
|
* @access public
|
|
* @param array|NULL $data Data to output to the user
|
|
* @param int|NULL $http_code HTTP status code
|
|
*/
|
|
public function set_response($data = NULL, $http_code = NULL)
|
|
{
|
|
$this->response($data, $http_code, TRUE);
|
|
}
|
|
|
|
/**
|
|
* Get the input format e.g. json or xml
|
|
*
|
|
* @access protected
|
|
* @return string|NULL Supported input format; otherwise, NULL
|
|
*/
|
|
protected function _detect_input_format()
|
|
{
|
|
// Get the CONTENT-TYPE value from the SERVER variable
|
|
$content_type = $this->input->server('CONTENT_TYPE');
|
|
|
|
if (empty($content_type) === FALSE)
|
|
{
|
|
// Check all formats against the HTTP_ACCEPT header
|
|
foreach ($this->_supported_formats as $key => $value)
|
|
{
|
|
// $key = format e.g. csv
|
|
// $value = mime type e.g. application/csv
|
|
|
|
// If a semi-colon exists in the string, then explode by ; and get the value of where
|
|
// the current array pointer resides. This will generally be the first element of the array
|
|
$content_type = (strpos($content_type, ';') !== FALSE ? current(explode(';', $content_type)) : $content_type);
|
|
|
|
// If both the mime types match, then return the format
|
|
if ($content_type === $value)
|
|
{
|
|
return $key;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Gets the default format from the configuration. Fallbacks to 'json'
|
|
* if the corresponding configuration option $config['rest_default_format']
|
|
* is missing or is empty
|
|
*
|
|
* @access protected
|
|
* @return string The default supported input format
|
|
*/
|
|
protected function _get_default_output_format()
|
|
{
|
|
$default_format = (string) $this->config->item('rest_default_format');
|
|
return $default_format === '' ? 'json' : $default_format;
|
|
}
|
|
|
|
/**
|
|
* Detect which format should be used to output the data
|
|
*
|
|
* @access protected
|
|
* @return mixed|NULL|string Output format
|
|
*/
|
|
protected function _detect_output_format()
|
|
{
|
|
// Concatenate formats to a regex pattern e.g. \.(csv|json|xml)
|
|
$pattern = '/\.(' . implode('|', array_keys($this->_supported_formats)) . ')($|\/)/';
|
|
$matches = [];
|
|
|
|
// Check if a file extension is used e.g. http://example.com/api/index.json?param1=param2
|
|
if (preg_match($pattern, $this->uri->uri_string(), $matches))
|
|
{
|
|
return $matches[1];
|
|
}
|
|
|
|
// Get the format parameter named as 'format'
|
|
if (isset($this->_get_args['format']))
|
|
{
|
|
$format = strtolower($this->_get_args['format']);
|
|
|
|
if (isset($this->_supported_formats[$format]) === TRUE)
|
|
{
|
|
return $format;
|
|
}
|
|
}
|
|
|
|
// Get the HTTP_ACCEPT server variable
|
|
$http_accept = $this->input->server('HTTP_ACCEPT');
|
|
|
|
// Otherwise, check the HTTP_ACCEPT server variable
|
|
if ($this->config->item('rest_ignore_http_accept') === FALSE && $http_accept !== NULL)
|
|
{
|
|
// Check all formats against the HTTP_ACCEPT header
|
|
foreach (array_keys($this->_supported_formats) as $format)
|
|
{
|
|
// Has this format been requested?
|
|
if (strpos($http_accept, $format) !== FALSE)
|
|
{
|
|
if ($format !== 'html' && $format !== 'xml')
|
|
{
|
|
// If not HTML or XML assume it's correct
|
|
return $format;
|
|
}
|
|
elseif ($format === 'html' && strpos($http_accept, 'xml') === FALSE)
|
|
{
|
|
// HTML or XML have shown up as a match
|
|
// If it is truly HTML, it wont want any XML
|
|
return $format;
|
|
}
|
|
else if ($format === 'xml' && strpos($http_accept, 'html') === FALSE)
|
|
{
|
|
// If it is truly XML, it wont want any HTML
|
|
return $format;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check if the controller has a default format
|
|
if (empty($this->rest_format) === FALSE)
|
|
{
|
|
return $this->rest_format;
|
|
}
|
|
|
|
// Obtain the default format from the configuration
|
|
return $this->_get_default_output_format();
|
|
}
|
|
|
|
/**
|
|
* Get the HTTP request string e.g. get or post
|
|
*
|
|
* @access protected
|
|
* @return string|NULL Supported request method as a lowercase string; otherwise, NULL if not supported
|
|
*/
|
|
protected function _detect_method()
|
|
{
|
|
// Declare a variable to store the method
|
|
$method = NULL;
|
|
|
|
// Determine whether the 'enable_emulate_request' setting is enabled
|
|
if ($this->config->item('enable_emulate_request') === TRUE)
|
|
{
|
|
$method = $this->input->post('_method');
|
|
if ($method === NULL)
|
|
{
|
|
$method = $this->input->server('HTTP_X_HTTP_METHOD_OVERRIDE');
|
|
}
|
|
|
|
$method = strtolower($method);
|
|
}
|
|
|
|
if (empty($method))
|
|
{
|
|
// Get the request method as a lowercase string
|
|
$method = $this->input->method();
|
|
}
|
|
|
|
return in_array($method, $this->allowed_http_methods) && method_exists($this, '_parse_' . $method) ? $method : 'get';
|
|
}
|
|
|
|
/**
|
|
* See if the user has provided an API key
|
|
*
|
|
* @access protected
|
|
* @return bool
|
|
*/
|
|
protected function _detect_api_key()
|
|
{
|
|
// Get the api key name variable set in the rest config file
|
|
$api_key_variable = $this->config->item('rest_key_name');
|
|
|
|
// Work out the name of the SERVER entry based on config
|
|
$key_name = 'HTTP_' . strtoupper(str_replace('-', '_', $api_key_variable));
|
|
|
|
$this->rest->key = NULL;
|
|
$this->rest->level = NULL;
|
|
$this->rest->user_id = NULL;
|
|
$this->rest->ignore_limits = FALSE;
|
|
|
|
// Find the key from server or arguments
|
|
if (($key = isset($this->_args[$api_key_variable]) ? $this->_args[$api_key_variable] : $this->input->server($key_name)))
|
|
{
|
|
if (!($row = $this->rest->db->where($this->config->item('rest_key_column'), $key)->get($this->config->item('rest_keys_table'))->row()))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$this->rest->key = $row->{$this->config->item('rest_key_column')};
|
|
|
|
isset($row->user_id) && $this->rest->user_id = $row->user_id;
|
|
isset($row->level) && $this->rest->level = $row->level;
|
|
isset($row->ignore_limits) && $this->rest->ignore_limits = $row->ignore_limits;
|
|
|
|
$this->_apiuser = $row;
|
|
|
|
/*
|
|
* If "is private key" is enabled, compare the ip address with the list
|
|
* of valid ip addresses stored in the database
|
|
*/
|
|
if (empty($row->is_private_key) === FALSE)
|
|
{
|
|
// Check for a list of valid ip addresses
|
|
if (isset($row->ip_addresses))
|
|
{
|
|
// multiple ip addresses must be separated using a comma, explode and loop
|
|
$list_ip_addresses = explode(',', $row->ip_addresses);
|
|
$found_address = FALSE;
|
|
|
|
foreach ($list_ip_addresses as $ip_address)
|
|
{
|
|
if ($this->input->ip_address() === trim($ip_address))
|
|
{
|
|
// there is a match, set the the value to TRUE and break out of the loop
|
|
$found_address = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return $found_address;
|
|
}
|
|
else
|
|
{
|
|
// There should be at least one IP address for this private key
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// No key has been sent
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Preferred return language
|
|
*
|
|
* @access protected
|
|
* @return string|NULL The language code
|
|
*/
|
|
protected function _detect_lang()
|
|
{
|
|
$lang = $this->input->server('HTTP_ACCEPT_LANGUAGE');
|
|
if ($lang === NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
// It appears more than one language has been sent using a comma delimiter
|
|
if (strpos($lang, ',') !== FALSE)
|
|
{
|
|
$langs = explode(',', $lang);
|
|
|
|
$return_langs = [];
|
|
foreach ($langs as $lang)
|
|
{
|
|
// Remove weight and trim leading and trailing whitespace
|
|
list($lang) = explode(';', $lang);
|
|
$return_langs[] = trim($lang);
|
|
}
|
|
|
|
return $return_langs;
|
|
}
|
|
|
|
// Otherwise simply return as a string
|
|
return $lang;
|
|
}
|
|
|
|
/**
|
|
* Add the request to the log table
|
|
*
|
|
* @access protected
|
|
* @param bool $authorized TRUE the user is authorized; otherwise, FALSE
|
|
* @return bool TRUE the data was inserted; otherwise, FALSE
|
|
*/
|
|
protected function _log_request($authorized = FALSE)
|
|
{
|
|
// Insert the request into the log table
|
|
$is_inserted = $this->rest->db
|
|
->insert(
|
|
$this->config->item('rest_logs_table'), [
|
|
'uri' => $this->uri->uri_string(),
|
|
'method' => $this->request->method,
|
|
'params' => $this->_args ? ($this->config->item('rest_logs_json_params') === TRUE ? json_encode($this->_args) : serialize($this->_args)) : NULL,
|
|
'api_key' => isset($this->rest->key) ? $this->rest->key : '',
|
|
'ip_address' => $this->input->ip_address(),
|
|
'time' => time(),
|
|
'authorized' => $authorized
|
|
]);
|
|
|
|
// Get the last insert id to update at a later stage of the request
|
|
$this->_insert_id = $this->rest->db->insert_id();
|
|
|
|
return $is_inserted;
|
|
}
|
|
|
|
/**
|
|
* Check if the requests to a controller method exceed a limit
|
|
*
|
|
* @access protected
|
|
* @param string $controller_method The method being called
|
|
* @return bool TRUE the call limit is below the threshold; otherwise, FALSE
|
|
*/
|
|
protected function _check_limit($controller_method)
|
|
{
|
|
// They are special, or it might not even have a limit
|
|
if (empty($this->rest->ignore_limits) === FALSE)
|
|
{
|
|
// Everything is fine
|
|
return TRUE;
|
|
}
|
|
|
|
switch ($this->config->item('rest_limits_method'))
|
|
{
|
|
case 'API_KEY':
|
|
$limited_uri = 'api-key:' . (isset($this->rest->key) ? $this->rest->key : '');
|
|
$limited_method_name = isset($this->rest->key) ? $this->rest->key : '';
|
|
break;
|
|
|
|
case 'METHOD_NAME':
|
|
$limited_uri = 'method-name:' . $controller_method;
|
|
$limited_method_name = $controller_method;
|
|
break;
|
|
|
|
case 'ROUTED_URL':
|
|
default:
|
|
$limited_uri = $this->uri->ruri_string();
|
|
if (strpos(strrev($limited_uri), strrev($this->response->format)) === 0)
|
|
{
|
|
$limited_uri = substr($limited_uri,0, -strlen($this->response->format) - 1);
|
|
}
|
|
$limited_uri = 'uri:' . $limited_uri . ':' . $this->request->method; // It's good to differentiate GET from PUT
|
|
$limited_method_name = $controller_method;
|
|
break;
|
|
}
|
|
|
|
if (isset($this->methods[$limited_method_name]['limit']) === FALSE )
|
|
{
|
|
// Everything is fine
|
|
return TRUE;
|
|
}
|
|
|
|
// How many times can you get to this method in a defined time_limit (default: 1 hour)?
|
|
$limit = $this->methods[$limited_method_name]['limit'];
|
|
|
|
$time_limit = (isset($this->methods[$limited_method_name]['time']) ? $this->methods[$limited_method_name]['time'] : 3600); // 3600 = 60 * 60
|
|
|
|
// Get data about a keys' usage and limit to one row
|
|
$result = $this->rest->db
|
|
->where('uri', $limited_uri)
|
|
->where('api_key', $this->rest->key)
|
|
->get($this->config->item('rest_limits_table'))
|
|
->row();
|
|
|
|
// No calls have been made for this key
|
|
if ($result === NULL)
|
|
{
|
|
// Create a new row for the following key
|
|
$this->rest->db->insert($this->config->item('rest_limits_table'), [
|
|
'uri' => $limited_uri,
|
|
'api_key' => isset($this->rest->key) ? $this->rest->key : '',
|
|
'count' => 1,
|
|
'hour_started' => time()
|
|
]);
|
|
}
|
|
|
|
// Been a time limit (or by default an hour) since they called
|
|
elseif ($result->hour_started < (time() - $time_limit))
|
|
{
|
|
// Reset the started period and count
|
|
$this->rest->db
|
|
->where('uri', $limited_uri)
|
|
->where('api_key', isset($this->rest->key) ? $this->rest->key : '')
|
|
->set('hour_started', time())
|
|
->set('count', 1)
|
|
->update($this->config->item('rest_limits_table'));
|
|
}
|
|
|
|
// They have called within the hour, so lets update
|
|
else
|
|
{
|
|
// The limit has been exceeded
|
|
if ($result->count >= $limit)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
// Increase the count by one
|
|
$this->rest->db
|
|
->where('uri', $limited_uri)
|
|
->where('api_key', $this->rest->key)
|
|
->set('count', 'count + 1', FALSE)
|
|
->update($this->config->item('rest_limits_table'));
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Check if there is a specific auth type set for the current class/method/HTTP-method being called
|
|
*
|
|
* @access protected
|
|
* @return bool
|
|
*/
|
|
protected function _auth_override_check()
|
|
{
|
|
// Assign the class/method auth type override array from the config
|
|
$auth_override_class_method = $this->config->item('auth_override_class_method');
|
|
|
|
// Check to see if the override array is even populated
|
|
if (!empty($auth_override_class_method))
|
|
{
|
|
// check for wildcard flag for rules for classes
|
|
if (!empty($auth_override_class_method[$this->router->class]['*'])) // Check for class overrides
|
|
{
|
|
// None auth override found, prepare nothing but send back a TRUE override flag
|
|
if ($auth_override_class_method[$this->router->class]['*'] === 'none')
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Basic auth override found, prepare basic
|
|
if ($auth_override_class_method[$this->router->class]['*'] === 'basic')
|
|
{
|
|
$this->_prepare_basic_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Digest auth override found, prepare digest
|
|
if ($auth_override_class_method[$this->router->class]['*'] === 'digest')
|
|
{
|
|
$this->_prepare_digest_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Session auth override found, check session
|
|
if ($auth_override_class_method[$this->router->class]['*'] === 'session')
|
|
{
|
|
$this->_check_php_session();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Whitelist auth override found, check client's ip against config whitelist
|
|
if ($auth_override_class_method[$this->router->class]['*'] === 'whitelist')
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
// Check to see if there's an override value set for the current class/method being called
|
|
if (!empty($auth_override_class_method[$this->router->class][$this->router->method]))
|
|
{
|
|
// None auth override found, prepare nothing but send back a TRUE override flag
|
|
if ($auth_override_class_method[$this->router->class][$this->router->method] === 'none')
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Basic auth override found, prepare basic
|
|
if ($auth_override_class_method[$this->router->class][$this->router->method] === 'basic')
|
|
{
|
|
$this->_prepare_basic_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Digest auth override found, prepare digest
|
|
if ($auth_override_class_method[$this->router->class][$this->router->method] === 'digest')
|
|
{
|
|
$this->_prepare_digest_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Session auth override found, check session
|
|
if ($auth_override_class_method[$this->router->class][$this->router->method] === 'session')
|
|
{
|
|
$this->_check_php_session();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Whitelist auth override found, check client's ip against config whitelist
|
|
if ($auth_override_class_method[$this->router->class][$this->router->method] === 'whitelist')
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Assign the class/method/HTTP-method auth type override array from the config
|
|
$auth_override_class_method_http = $this->config->item('auth_override_class_method_http');
|
|
|
|
// Check to see if the override array is even populated
|
|
if (!empty($auth_override_class_method_http))
|
|
{
|
|
// check for wildcard flag for rules for classes
|
|
if(!empty($auth_override_class_method_http[$this->router->class]['*'][$this->request->method]))
|
|
{
|
|
// None auth override found, prepare nothing but send back a TRUE override flag
|
|
if ($auth_override_class_method_http[$this->router->class]['*'][$this->request->method] === 'none')
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Basic auth override found, prepare basic
|
|
if ($auth_override_class_method_http[$this->router->class]['*'][$this->request->method] === 'basic')
|
|
{
|
|
$this->_prepare_basic_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Digest auth override found, prepare digest
|
|
if ($auth_override_class_method_http[$this->router->class]['*'][$this->request->method] === 'digest')
|
|
{
|
|
$this->_prepare_digest_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Session auth override found, check session
|
|
if ($auth_override_class_method_http[$this->router->class]['*'][$this->request->method] === 'session')
|
|
{
|
|
$this->_check_php_session();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Whitelist auth override found, check client's ip against config whitelist
|
|
if ($auth_override_class_method_http[$this->router->class]['*'][$this->request->method] === 'whitelist')
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
// Check to see if there's an override value set for the current class/method/HTTP-method being called
|
|
if(!empty($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method]))
|
|
{
|
|
// None auth override found, prepare nothing but send back a TRUE override flag
|
|
if ($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method] === 'none')
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Basic auth override found, prepare basic
|
|
if ($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method] === 'basic')
|
|
{
|
|
$this->_prepare_basic_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Digest auth override found, prepare digest
|
|
if ($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method] === 'digest')
|
|
{
|
|
$this->_prepare_digest_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Session auth override found, check session
|
|
if ($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method] === 'session')
|
|
{
|
|
$this->_check_php_session();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
// Whitelist auth override found, check client's ip against config whitelist
|
|
if ($auth_override_class_method_http[$this->router->class][$this->router->method][$this->request->method] === 'whitelist')
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
|
|
return TRUE;
|
|
}
|
|
}
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* Parse the GET request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_get()
|
|
{
|
|
// Merge both the URI segments and query parameters
|
|
$this->_get_args = array_merge($this->_get_args, $this->_query_args);
|
|
}
|
|
|
|
/**
|
|
* Parse the POST request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_post()
|
|
{
|
|
$this->_post_args = $_POST;
|
|
|
|
if ($this->request->format)
|
|
{
|
|
$this->request->body = $this->input->raw_input_stream;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse the PUT request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_put()
|
|
{
|
|
if ($this->request->format)
|
|
{
|
|
$this->request->body = $this->input->raw_input_stream;
|
|
}
|
|
else if ($this->input->method() === 'put')
|
|
{
|
|
// If no filetype is provided, then there are probably just arguments
|
|
$this->_put_args = $this->input->input_stream();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse the HEAD request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_head()
|
|
{
|
|
// Parse the HEAD variables
|
|
parse_str(parse_url($this->input->server('REQUEST_URI'), PHP_URL_QUERY), $head);
|
|
|
|
// Merge both the URI segments and HEAD params
|
|
$this->_head_args = array_merge($this->_head_args, $head);
|
|
}
|
|
|
|
/**
|
|
* Parse the OPTIONS request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_options()
|
|
{
|
|
// Parse the OPTIONS variables
|
|
parse_str(parse_url($this->input->server('REQUEST_URI'), PHP_URL_QUERY), $options);
|
|
|
|
// Merge both the URI segments and OPTIONS params
|
|
$this->_options_args = array_merge($this->_options_args, $options);
|
|
}
|
|
|
|
/**
|
|
* Parse the PATCH request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_patch()
|
|
{
|
|
// It might be a HTTP body
|
|
if ($this->request->format)
|
|
{
|
|
$this->request->body = $this->input->raw_input_stream;
|
|
}
|
|
else if ($this->input->method() === 'patch')
|
|
{
|
|
// If no filetype is provided, then there are probably just arguments
|
|
$this->_patch_args = $this->input->input_stream();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse the DELETE request arguments
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_delete()
|
|
{
|
|
// These should exist if a DELETE request
|
|
if ($this->input->method() === 'delete')
|
|
{
|
|
$this->_delete_args = $this->input->input_stream();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse the query parameters
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _parse_query()
|
|
{
|
|
$this->_query_args = $this->input->get();
|
|
}
|
|
|
|
// INPUT FUNCTION --------------------------------------------------------------
|
|
|
|
/**
|
|
* Retrieve a value from a GET request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the GET request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the GET request; otherwise, NULL
|
|
*/
|
|
public function get($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_get_args;
|
|
}
|
|
|
|
return isset($this->_get_args[$key]) ? $this->_xss_clean($this->_get_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a OPTIONS request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the OPTIONS request.
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the OPTIONS request; otherwise, NULL
|
|
*/
|
|
public function options($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_options_args;
|
|
}
|
|
|
|
return isset($this->_options_args[$key]) ? $this->_xss_clean($this->_options_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a HEAD request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the HEAD request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the HEAD request; otherwise, NULL
|
|
*/
|
|
public function head($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_head_args;
|
|
}
|
|
|
|
return isset($this->_head_args[$key]) ? $this->_xss_clean($this->_head_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a POST request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the POST request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the POST request; otherwise, NULL
|
|
*/
|
|
public function post($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_post_args;
|
|
}
|
|
|
|
return isset($this->_post_args[$key]) ? $this->_xss_clean($this->_post_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a PUT request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the PUT request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the PUT request; otherwise, NULL
|
|
*/
|
|
public function put($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_put_args;
|
|
}
|
|
|
|
return isset($this->_put_args[$key]) ? $this->_xss_clean($this->_put_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a DELETE request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the DELETE request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the DELETE request; otherwise, NULL
|
|
*/
|
|
public function delete($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_delete_args;
|
|
}
|
|
|
|
return isset($this->_delete_args[$key]) ? $this->_xss_clean($this->_delete_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from a PATCH request
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the PATCH request
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the PATCH request; otherwise, NULL
|
|
*/
|
|
public function patch($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_patch_args;
|
|
}
|
|
|
|
return isset($this->_patch_args[$key]) ? $this->_xss_clean($this->_patch_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Retrieve a value from the query parameters
|
|
*
|
|
* @access public
|
|
* @param NULL $key Key to retrieve from the query parameters
|
|
* If NULL an array of arguments is returned
|
|
* @param NULL $xss_clean Whether to apply XSS filtering
|
|
* @return array|string|NULL Value from the query parameters; otherwise, NULL
|
|
*/
|
|
public function query($key = NULL, $xss_clean = NULL)
|
|
{
|
|
if ($key === NULL)
|
|
{
|
|
return $this->_query_args;
|
|
}
|
|
|
|
return isset($this->_query_args[$key]) ? $this->_xss_clean($this->_query_args[$key], $xss_clean) : NULL;
|
|
}
|
|
|
|
/**
|
|
* Sanitizes data so that Cross Site Scripting Hacks can be
|
|
* prevented
|
|
*
|
|
* @access protected
|
|
* @param string $value Input data
|
|
* @param bool $xss_clean Whether to apply XSS filtering
|
|
* @return string
|
|
*/
|
|
protected function _xss_clean($value, $xss_clean)
|
|
{
|
|
is_bool($xss_clean) || $xss_clean = $this->_enable_xss;
|
|
|
|
return $xss_clean === TRUE ? $this->security->xss_clean($value) : $value;
|
|
}
|
|
|
|
/**
|
|
* Retrieve the validation errors
|
|
*
|
|
* @access public
|
|
* @return array
|
|
*/
|
|
public function validation_errors()
|
|
{
|
|
$string = strip_tags($this->form_validation->error_string());
|
|
|
|
return explode(PHP_EOL, trim($string, PHP_EOL));
|
|
}
|
|
|
|
// SECURITY FUNCTIONS ---------------------------------------------------------
|
|
|
|
/**
|
|
* Perform LDAP Authentication
|
|
*
|
|
* @access protected
|
|
* @param string $username The username to validate
|
|
* @param string $password The password to validate
|
|
* @return bool
|
|
*/
|
|
protected function _perform_ldap_auth($username = '', $password = NULL)
|
|
{
|
|
if (empty($username))
|
|
{
|
|
log_message('debug', 'LDAP Auth: failure, empty username');
|
|
return FALSE;
|
|
}
|
|
|
|
log_message('debug', 'LDAP Auth: Loading configuration');
|
|
|
|
$this->config->load('ldap.php', TRUE);
|
|
|
|
$ldap = [
|
|
'timeout' => $this->config->item('timeout', 'ldap'),
|
|
'host' => $this->config->item('server', 'ldap'),
|
|
'port' => $this->config->item('port', 'ldap'),
|
|
'rdn' => $this->config->item('binduser', 'ldap'),
|
|
'pass' => $this->config->item('bindpw', 'ldap'),
|
|
'basedn' => $this->config->item('basedn', 'ldap'),
|
|
];
|
|
|
|
log_message('debug', 'LDAP Auth: Connect to ' . (isset($ldaphost) ? $ldaphost : '[ldap not configured]'));
|
|
|
|
// Connect to the ldap server
|
|
$ldapconn = ldap_connect($ldap['host'], $ldap['port']);
|
|
if ($ldapconn)
|
|
{
|
|
log_message('debug', 'Setting timeout to ' . $ldap['timeout'] . ' seconds');
|
|
|
|
ldap_set_option($ldapconn, LDAP_OPT_NETWORK_TIMEOUT, $ldap['timeout']);
|
|
|
|
log_message('debug', 'LDAP Auth: Binding to ' . $ldap['host'] . ' with dn ' . $ldap['rdn']);
|
|
|
|
// Binding to the ldap server
|
|
$ldapbind = ldap_bind($ldapconn, $ldap['rdn'], $ldap['pass']);
|
|
|
|
// Verify the binding
|
|
if ($ldapbind === FALSE)
|
|
{
|
|
log_message('error', 'LDAP Auth: bind was unsuccessful');
|
|
return FALSE;
|
|
}
|
|
|
|
log_message('debug', 'LDAP Auth: bind successful');
|
|
}
|
|
|
|
// Search for user
|
|
if (($res_id = ldap_search($ldapconn, $ldap['basedn'], "uid=$username")) === FALSE)
|
|
{
|
|
log_message('error', 'LDAP Auth: User ' . $username . ' not found in search');
|
|
return FALSE;
|
|
}
|
|
|
|
if (ldap_count_entries($ldapconn, $res_id) !== 1)
|
|
{
|
|
log_message('error', 'LDAP Auth: Failure, username ' . $username . 'found more than once');
|
|
return FALSE;
|
|
}
|
|
|
|
if (($entry_id = ldap_first_entry($ldapconn, $res_id)) === FALSE)
|
|
{
|
|
log_message('error', 'LDAP Auth: Failure, entry of search result could not be fetched');
|
|
return FALSE;
|
|
}
|
|
|
|
if (($user_dn = ldap_get_dn($ldapconn, $entry_id)) === FALSE)
|
|
{
|
|
log_message('error', 'LDAP Auth: Failure, user-dn could not be fetched');
|
|
return FALSE;
|
|
}
|
|
|
|
// User found, could not authenticate as user
|
|
if (($link_id = ldap_bind($ldapconn, $user_dn, $password)) === FALSE)
|
|
{
|
|
log_message('error', 'LDAP Auth: Failure, username/password did not match: ' . $user_dn);
|
|
return FALSE;
|
|
}
|
|
|
|
log_message('debug', 'LDAP Auth: Success ' . $user_dn . ' authenticated successfully');
|
|
|
|
$this->_user_ldap_dn = $user_dn;
|
|
|
|
ldap_close($ldapconn);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Perform Library Authentication - Override this function to change the way the library is called
|
|
*
|
|
* @access protected
|
|
* @param string $username The username to validate
|
|
* @param string $password The password to validate
|
|
* @return bool
|
|
*/
|
|
protected function _perform_library_auth($username = '', $password = NULL)
|
|
{
|
|
if (empty($username))
|
|
{
|
|
log_message('error', 'Library Auth: Failure, empty username');
|
|
return FALSE;
|
|
}
|
|
|
|
$auth_library_class = strtolower($this->config->item('auth_library_class'));
|
|
$auth_library_function = strtolower($this->config->item('auth_library_function'));
|
|
|
|
if (empty($auth_library_class))
|
|
{
|
|
log_message('debug', 'Library Auth: Failure, empty auth_library_class');
|
|
return FALSE;
|
|
}
|
|
|
|
if (empty($auth_library_function))
|
|
{
|
|
log_message('debug', 'Library Auth: Failure, empty auth_library_function');
|
|
return FALSE;
|
|
}
|
|
|
|
if (is_callable([$auth_library_class, $auth_library_function]) === FALSE)
|
|
{
|
|
$this->load->library($auth_library_class);
|
|
}
|
|
|
|
return $this->{$auth_library_class}->$auth_library_function($username, $password);
|
|
}
|
|
|
|
/**
|
|
* Check if the user is logged in
|
|
*
|
|
* @access protected
|
|
* @param string $username The user's name
|
|
* @param bool|string $password The user's password
|
|
* @return bool
|
|
*/
|
|
protected function _check_login($username = NULL, $password = FALSE)
|
|
{
|
|
if (empty($username))
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
$auth_source = strtolower($this->config->item('auth_source'));
|
|
$rest_auth = strtolower($this->config->item('rest_auth'));
|
|
$valid_logins = $this->config->item('rest_valid_logins');
|
|
|
|
if (!$this->config->item('auth_source') && $rest_auth === 'digest')
|
|
{
|
|
// For digest we do not have a password passed as argument
|
|
return md5($username . ':' . $this->config->item('rest_realm') . ':' . (isset($valid_logins[$username]) ? $valid_logins[$username] : ''));
|
|
}
|
|
|
|
if ($password === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if ($auth_source === 'ldap')
|
|
{
|
|
log_message('debug', "Performing LDAP authentication for $username");
|
|
|
|
return $this->_perform_ldap_auth($username, $password);
|
|
}
|
|
|
|
if ($auth_source === 'library')
|
|
{
|
|
log_message('debug', "Performing Library authentication for $username");
|
|
|
|
return $this->_perform_library_auth($username, $password);
|
|
}
|
|
|
|
if (array_key_exists($username, $valid_logins) === FALSE)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
if ($valid_logins[$username] !== $password)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* Check to see if the user is logged in with a PHP session key
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _check_php_session()
|
|
{
|
|
// Get the auth_source config item
|
|
$key = $this->config->item('auth_source');
|
|
|
|
// If falsy, then the user isn't logged in
|
|
if (!$this->session->userdata($key))
|
|
{
|
|
// Display an error response
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_unauthorized')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prepares for basic authentication
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _prepare_basic_auth()
|
|
{
|
|
// If whitelist is enabled it has the first chance to kick them out
|
|
if ($this->config->item('rest_ip_whitelist_enabled'))
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
}
|
|
|
|
// Returns NULL if the SERVER variables PHP_AUTH_USER and HTTP_AUTHENTICATION don't exist
|
|
$username = $this->input->server('PHP_AUTH_USER');
|
|
$http_auth = $this->input->server('HTTP_AUTHENTICATION');
|
|
|
|
$password = NULL;
|
|
if ($username !== NULL)
|
|
{
|
|
$password = $this->input->server('PHP_AUTH_PW');
|
|
}
|
|
elseif ($http_auth !== NULL)
|
|
{
|
|
// If the authentication header is set as basic, then extract the username and password from
|
|
// HTTP_AUTHORIZATION e.g. my_username:my_password. This is passed in the .htaccess file
|
|
if (strpos(strtolower($http_auth), 'basic') === 0)
|
|
{
|
|
// Search online for HTTP_AUTHORIZATION workaround to explain what this is doing
|
|
list($username, $password) = explode(':', base64_decode(substr($this->input->server('HTTP_AUTHORIZATION'), 6)));
|
|
}
|
|
}
|
|
|
|
// Check if the user is logged into the system
|
|
if ($this->_check_login($username, $password) === FALSE)
|
|
{
|
|
$this->_force_login();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Prepares for digest authentication
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _prepare_digest_auth()
|
|
{
|
|
// If whitelist is enabled it has the first chance to kick them out
|
|
if ($this->config->item('rest_ip_whitelist_enabled'))
|
|
{
|
|
$this->_check_whitelist_auth();
|
|
}
|
|
|
|
// We need to test which server authentication variable to use,
|
|
// because the PHP ISAPI module in IIS acts different from CGI
|
|
$digest_string = $this->input->server('PHP_AUTH_DIGEST');
|
|
if ($digest_string === NULL)
|
|
{
|
|
$digest_string = $this->input->server('HTTP_AUTHORIZATION');
|
|
}
|
|
|
|
$unique_id = uniqid();
|
|
|
|
// The $_SESSION['error_prompted'] variable is used to ask the password
|
|
// again if none given or if the user enters wrong auth information
|
|
if (empty($digest_string))
|
|
{
|
|
$this->_force_login($unique_id);
|
|
}
|
|
|
|
// We need to retrieve authentication data from the $digest_string variable
|
|
$matches = [];
|
|
preg_match_all('@(username|nonce|uri|nc|cnonce|qop|response)=[\'"]?([^\'",]+)@', $digest_string, $matches);
|
|
$digest = (empty($matches[1]) || empty($matches[2])) ? [] : array_combine($matches[1], $matches[2]);
|
|
|
|
// For digest authentication the library function should return already stored md5(username:restrealm:password) for that username @see rest.php::auth_library_function config
|
|
$username = $this->_check_login($digest['username'], TRUE);
|
|
if (array_key_exists('username', $digest) === FALSE || $username === FALSE)
|
|
{
|
|
$this->_force_login($unique_id);
|
|
}
|
|
|
|
$md5 = md5(strtoupper($this->request->method) . ':' . $digest['uri']);
|
|
$valid_response = md5($username . ':' . $digest['nonce'] . ':' . $digest['nc'] . ':' . $digest['cnonce'] . ':' . $digest['qop'] . ':' . $md5);
|
|
|
|
// Check if the string don't compare (case-insensitive)
|
|
if (strcasecmp($digest['response'], $valid_response) !== 0)
|
|
{
|
|
// Display an error response
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_invalid_credentials')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks if the client's ip is in the 'rest_ip_blacklist' config and generates a 401 response
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _check_blacklist_auth()
|
|
{
|
|
// Match an ip address in a blacklist e.g. 127.0.0.0, 0.0.0.0
|
|
$pattern = sprintf('/(?:,\s*|^)\Q%s\E(?=,\s*|$)/m', $this->input->ip_address());
|
|
|
|
// Returns 1, 0 or FALSE (on error only). Therefore implicitly convert 1 to TRUE
|
|
if (preg_match($pattern, $this->config->item('rest_ip_blacklist')))
|
|
{
|
|
// Display an error response
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_ip_denied')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Check if the client's ip is in the 'rest_ip_whitelist' config and generates a 401 response
|
|
*
|
|
* @access protected
|
|
* @return void
|
|
*/
|
|
protected function _check_whitelist_auth()
|
|
{
|
|
$whitelist = explode(',', $this->config->item('rest_ip_whitelist'));
|
|
|
|
array_push($whitelist, '127.0.0.1', '0.0.0.0');
|
|
|
|
foreach ($whitelist as &$ip)
|
|
{
|
|
// As $ip is a reference, trim leading and trailing whitespace, then store the new value
|
|
// using the reference
|
|
$ip = trim($ip);
|
|
}
|
|
|
|
if (in_array($this->input->ip_address(), $whitelist) === FALSE)
|
|
{
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_ip_unauthorized')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Force logging in by setting the WWW-Authenticate header
|
|
*
|
|
* @access protected
|
|
* @param string $nonce A server-specified data string which should be uniquely generated
|
|
* each time
|
|
* @return void
|
|
*/
|
|
protected function _force_login($nonce = '')
|
|
{
|
|
$rest_auth = $this->config->item('rest_auth');
|
|
$rest_realm = $this->config->item('rest_realm');
|
|
if (strtolower($rest_auth) === 'basic')
|
|
{
|
|
// See http://tools.ietf.org/html/rfc2617#page-5
|
|
header('WWW-Authenticate: Basic realm="' . $rest_realm . '"');
|
|
}
|
|
elseif (strtolower($rest_auth) === 'digest')
|
|
{
|
|
// See http://tools.ietf.org/html/rfc2617#page-18
|
|
header(
|
|
'WWW-Authenticate: Digest realm="' . $rest_realm
|
|
. '", qop="auth", nonce="' . $nonce
|
|
. '", opaque="' . md5($rest_realm) . '"');
|
|
}
|
|
|
|
// Display an error response
|
|
$this->response([
|
|
$this->config->item('rest_status_field_name') => FALSE,
|
|
$this->config->item('rest_message_field_name') => $this->lang->line('text_rest_unauthorized')
|
|
], self::HTTP_UNAUTHORIZED);
|
|
}
|
|
|
|
/**
|
|
* Updates the log table with the total access time
|
|
*
|
|
* @access protected
|
|
* @author Chris Kacerguis
|
|
* @return bool TRUE log table updated; otherwise, FALSE
|
|
*/
|
|
protected function _log_access_time()
|
|
{
|
|
$payload['rtime'] = $this->_end_rtime - $this->_start_rtime;
|
|
|
|
return $this->rest->db->update(
|
|
$this->config->item('rest_logs_table'), $payload, [
|
|
'id' => $this->_insert_id
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Updates the log table with HTTP response code
|
|
*
|
|
* @access protected
|
|
* @author Justin Chen
|
|
* @param $http_code int HTTP status code
|
|
* @return bool TRUE log table updated; otherwise, FALSE
|
|
*/
|
|
protected function _log_response_code($http_code)
|
|
{
|
|
$payload['response_code'] = $http_code;
|
|
|
|
return $this->rest->db->update(
|
|
$this->config->item('rest_logs_table'), $payload, [
|
|
'id' => $this->_insert_id
|
|
]);
|
|
}
|
|
|
|
/**
|
|
* Check to see if the API key has access to the controller and methods
|
|
*
|
|
* @access protected
|
|
* @return bool TRUE the API key has access; otherwise, FALSE
|
|
*/
|
|
protected function _check_access()
|
|
{
|
|
// If we don't want to check access, just return TRUE
|
|
if ($this->config->item('rest_enable_access') === FALSE)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
// Fetch controller based on path and controller name
|
|
$controller = implode(
|
|
'/', [
|
|
$this->router->directory,
|
|
$this->router->class
|
|
]);
|
|
|
|
// Remove any double slashes for safety
|
|
$controller = str_replace('//', '/', $controller);
|
|
|
|
// Query the access table and get the number of results
|
|
return $this->rest->db
|
|
->where('key', $this->rest->key)
|
|
->where('controller', $controller)
|
|
->get($this->config->item('rest_access_table'))
|
|
->num_rows() > 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* 에러 리턴
|
|
* @param $message
|
|
* @param int $error_code
|
|
*/
|
|
public function error_return( $message, $error_code = 400 )
|
|
{
|
|
$result = array(
|
|
"result" => FALSE,
|
|
"message" => $message
|
|
);
|
|
$this->response($result, $error_code);
|
|
}
|
|
|
|
}
|