services.runtime.inc in Services 6.3
Contains functions that only are necessary when a service call is made. This has broken out so that this code isn't loaded for every page load.
File
services.runtime.incView source
<?php
/**
* @file
* Contains functions that only are necessary when a service call is made.
* This has broken out so that this code isn't loaded for every page load.
*/
/**
* A exception thrown by services and related modules when something goes
* wrong.
*/
class ServicesException extends Exception {
private $data;
/**
* Constructor for the ServicesException.
*
* @param string $message
* Error message.
* @param int $code
* Optional. Error code. This often maps to the HTTP status codes. Defaults
* to 0.
* @param mixed $data
* Information that can be used by the server to return information about
* the error.
*/
public function __construct($message, $code = 0, $data = NULL) {
parent::__construct($message, $code);
$this->data = !empty($data) ? $data : $message;
}
/**
* Returns the data associated with the exception.
*
* @return mixed
*/
public function getData() {
return $this->data;
}
}
/**
* A exception thrown by services and related modules when an error related to
* a specific argument is encountered.
*/
class ServicesArgumentException extends ServicesException {
private $argument;
/**
* Constructor for the ServicesException.
*
* @param string $message
* Error message.
* @param string $argument_name
* The name of the argument that caused the error.
* @param int $code
* Optional. Error code. This often maps to the HTTP status codes. Defaults
* to 0.
* @param mixed $data
* Information that can be used by the server to return information about
* the error.
*/
public function __construct($message, $argument_name, $code, $data) {
parent::__construct($message, $code, $data);
$this->argument = $argument_name;
}
/**
* Returns the name of the argument that caused the error.
*
* @return string
* The name of the argument.
*/
public function getArgumentName() {
return $this->argument;
}
}
/**
* Performs access checks and executes a services controller.
* This method is called by server implementations.
*
* @param array $controller
* An array containing information about the controller
* @param array $args
* The arguments that should be passed to the controller.
* @param array $auth_args
* The arguments that should be passed to the authentication module.
* @param array $options
* Options for the execution. Use 'skip_authentication'=>TRUE to skip the
* services-specific authentication checks. Access checks will always be
* made.
*/
function services_controller_execute($controller, $args = array(), $options = array()) {
global $user;
// Check for missing arguments.
$server_info = services_server_info_object();
if ($server_info->debug) {
watchdog('services', 'Controller: <pre>@controller</pre>', array(
'@controller' => print_r($controller, TRUE),
), WATCHDOG_DEBUG);
watchdog('services', 'Passed arguments: <pre>@arguments</pre>', array(
'@arguments' => print_r($args, TRUE),
), WATCHDOG_DEBUG);
}
$original_user = $user;
if (strpos($controller['callback'], 'login') !== FALSE && strpos($controller['callback'], 'logout') !== FALSE) {
$old_state = session_save_session();
session_save_session(FALSE);
}
$user = drupal_anonymous_user();
$user->timestamp = time();
services_set_server_info('original_user', $original_user);
// Check authentication.
if (!isset($options['skip_authentication']) || !$options['skip_authentication']) {
$endpoint_name = services_get_server_info('endpoint');
$endpoint = services_endpoint_load($endpoint_name);
foreach ($endpoint->authentication as $auth_module => $settings) {
if (isset($settings) && ($auth_error = services_auth_invoke($auth_module, 'authenticate_call', $settings, $controller, $args))) {
return services_error($auth_error, 401);
}
}
}
// Load the proper file.
if (!empty($controller['file']) && ($file = $controller['file'])) {
module_load_include($file['type'], $file['module'], isset($file['name']) ? $file['name'] : NULL);
}
// Construct access arguments array.
if (isset($controller['access arguments'])) {
$access_arguments = $controller['access arguments'];
if (isset($controller['access arguments append']) && $controller['access arguments append']) {
$access_arguments[] = $args;
}
}
else {
// Just use the arguments array if no access arguments have been specified
$access_arguments = $args;
}
// Load the proper file for the access callback.
if (!empty($controller['access callback file']) && ($access_cb_file = $controller['access callback file'])) {
$access_cb_file_name = isset($access_cb_file['name']) ? $access_cb_file['name'] : NULL;
module_load_include($access_cb_file['type'], $access_cb_file['module'], $access_cb_file_name);
}
// Call default or custom access callback.
if (call_user_func_array($controller['access callback'], $access_arguments) != TRUE) {
return services_error(t('Access denied for user !uid "@user"', array(
'!uid' => $user->uid,
'@user' => isset($user->name) ? $user->name : 'anonymous',
)), 401);
}
// Preprocess controller and arguments.
$controller['__drupal_alter_by_ref'] = array(
&$args,
);
drupal_alter('services_request_preprocess', $controller, $args, $options);
// Execute the controller callback.
$result = call_user_func_array($controller['callback'], $args);
if (isset($server_root) && $server_root) {
chdir($server_root);
}
// Postprocess controller, arguments and result.
$controller['__drupal_alter_by_ref'] = array(
&$args,
&$result,
);
drupal_alter('services_request_postprocess', $controller);
if (strpos($controller['callback'], 'login') !== FALSE && strpos($controller['callback'], 'logout') !== FALSE) {
session_save_session($old_state);
}
if ($server_info->debug) {
watchdog('services', 'results: <pre>@results</pre>', array(
'@results' => print_r($result, TRUE),
), WATCHDOG_DEBUG);
}
return $result;
}
/**
* Gets information about a authentication module.
*
* @param string $module
* The module to get info for.
* @return mixed
* The information array, or FALSE if the information wasn't found.
*/
function services_authentication_info($module) {
$info = FALSE;
if (!empty($module) && module_exists($module) && is_callable($module . '_services_authentication_info')) {
$info = call_user_func($module . '_services_authentication_info');
}
return $info;
}
/**
* Invokes a authentication module callback.
*
* @param string $module
* The authentication module to invoke the callback for.
* @param string $method
* The callback to invoke.
* @param string $arg1
* Optional. First argument to pass to the callback.
* @param string $arg2
* Optional. Second argument to pass to the callback.
* @param string $arg3
* Optional. Third argument to pass to the callback.
* @param string $arg4
* Optional. Fourth argument to pass to the callback.
* @return mixed
*
* Aren't these really the following?
* arg1 = Settings
* arg2 = Method
* arg3 = Controller
* arg4 = Auth args
*
*/
function services_auth_invoke($module, $method, &$arg1 = NULL, &$arg2 = NULL, &$arg3 = NULL, $arg4 = NULL) {
// Get information about the auth module
$info = services_authentication_info($module);
$func = $info && !empty($info[$method]) ? $info[$method] : FALSE;
if ($func) {
if (!empty($info['file'])) {
require_once drupal_get_path('module', $module) . '/' . $info['file'];
}
if (is_callable($func)) {
$args = func_get_args();
// Replace module and method name and arg1 with reference to $arg1 and $arg2.
array_splice($args, 0, 5, array(
&$arg1,
&$arg2,
&$arg3,
&$arg4,
));
return call_user_func_array($func, $args);
}
}
else {
return TRUE;
}
}
/**
* Formats a resource uri using the formatter registered through
* services_set_server_info().
*
* @param array $path
* An array of strings containing the component parts of the path to the resource.
* @return string
* Returns the formatted resource uri, or NULL if no formatter has been registered.
*/
function services_resource_uri($path) {
//We need to use the alias if it exists.
$endpoint_name = services_get_server_info('endpoint');
$endpoint = services_endpoint_load($endpoint_name);
if (!empty($path[0]) && !empty($endpoint->resources[$path[0]]['alias'])) {
$path[0] = $endpoint->resources[$path[0]]['alias'];
}
$formatter = services_get_server_info('resource_uri_formatter');
if ($formatter) {
return call_user_func($formatter, $path);
}
return NULL;
}
/**
* Sets a server info value
*
* @param string $key
* The key of the server info value.
* @param mixed $value
* The value.
* @return void
*/
function services_set_server_info($key, $value) {
$info = services_server_info_object();
$info->{$key} = $value;
}
/**
* Sets multiple server info values from a associative array.
*
* @param array $values
* An associative array containing server info values.
* @return void
*/
function services_set_server_info_from_array($values) {
$info = services_server_info_object();
foreach ($values as $key => $value) {
$info->{$key} = $value;
}
}
/**
* Gets a server info value.
*
* @param string $key
* The key for the server info value.
* @param mixed $default
* The default value to return if the value isn't defined.
* @return mixed
* The server info value.
*/
function services_get_server_info($key, $default = NULL) {
$info = services_server_info_object();
$value = $default;
if (isset($info->{$key})) {
$value = $info->{$key};
}
return $value;
}
/**
* Gets the server info object.
*
* @param bool $reset
* Pass TRUE if the server info object should be reset.
* @return object
* Returns the server info object.
*/
function services_server_info_object($reset = FALSE) {
static $info;
if (!$info) {
$info = new stdClass();
}
return $info;
}
/**
* Prepare an error message for returning to the server.
*
* @param string $message
* Error message.
* @param int $code
* Optional. Error code. This often maps to the HTTP status codes. Defaults
* to 0.
* @param mixed $data
* Optional. Information that can be used by the server to return information about the error. Defaults to null.
* @return mixed
*/
function services_error($message, $code = 0, $data = NULL) {
throw new ServicesException($message, $code, $data);
}
/**
* Backup current session data and import user session.
*/
function services_session_load($sessid) {
global $user;
// If user's session is already loaded, just return current user's data
if ($user->sid == $sessid) {
return $user;
}
// Make backup of current user and session data
$backup = $user;
$backup->session = session_encode();
// Empty current session data
$_SESSION = array();
// Some client/servers, like XMLRPC, do not handle cookies, so imitate it to make sess_read() function try to look for user,
// instead of just loading anonymous user :).
$session_name = session_name();
if (!isset($_COOKIE[$session_name])) {
$_COOKIE[$session_name] = $sessid;
}
// Load session data
session_id($sessid);
sess_read($sessid);
// Check if it really loaded user and, for additional security, if user was logged from the same IP. If not, then revert automatically.
if ($user->sid != $sessid) {
services_session_unload($backup);
return NULL;
}
// Prevent saving of this impersonation in case of unexpected failure.
session_save_session(FALSE);
return $backup;
}
/**
* Revert to previously backuped session.
*/
function services_session_unload($backup) {
global $user;
// No point in reverting if it's the same user's data
if ($user->sid == $backup->sid) {
return;
}
// Some client/servers, like XMLRPC, do not handle cookies, so imitate it to make sess_read() function try to look for user,
// instead of just loading anonymous user :).
$session_name = session_name();
if (!isset($_COOKIE[$session_name])) {
$_COOKIE[$session_name] = $backup->sessid;
}
// Save current session data
sess_write($user->sid, session_encode());
// Empty current session data
$_SESSION = array();
// Revert to previous user and session data
$user = $backup;
session_id($backup->sessid);
session_decode($user->session);
session_save_session(TRUE);
}
/**
* Extract arguments for a services method callback, preserving backwards compatibility with #1083242.
*
* @param array $data
* original argument passed to a resource method callback
* @param string $field
* name of the field where arguments should be checked for
* @return array
*/
// Adds backwards compatability with regression fixed in #1083242
function _services_arg_value($data, $field) {
if (isset($data[$field]) && count($data) == 1 && is_array($data[$field])) {
return $data[$field];
}
return $data;
}
/**
* Extract arguments for a services method access callback, preserving backwards compatibility with #1083242.
*
* @param string $data
* original argument passed to a resource method callback
* @param mixed $fields
* name of the field(s) where arguments should be checked for, either as a string or as an array of strings
* @return array
*/
// Adds backwards compatability with regression fixed in #1083242
function _services_access_value($data, $fields) {
if (!is_array($fields)) {
$fields = array(
$fields,
);
}
foreach ($fields as $field) {
if (is_array($data) && isset($data[$field]) && count($data) == 1) {
return $data[$field];
}
}
return $data;
}
Functions
Name![]() |
Description |
---|---|
services_authentication_info | Gets information about a authentication module. |
services_auth_invoke | Invokes a authentication module callback. |
services_controller_execute | Performs access checks and executes a services controller. This method is called by server implementations. |
services_error | Prepare an error message for returning to the server. |
services_get_server_info | Gets a server info value. |
services_resource_uri | Formats a resource uri using the formatter registered through services_set_server_info(). |
services_server_info_object | Gets the server info object. |
services_session_load | Backup current session data and import user session. |
services_session_unload | Revert to previously backuped session. |
services_set_server_info | Sets a server info value |
services_set_server_info_from_array | Sets multiple server info values from a associative array. |
_services_access_value | |
_services_arg_value |
Classes
Name![]() |
Description |
---|---|
ServicesArgumentException | A exception thrown by services and related modules when an error related to a specific argument is encountered. |
ServicesException | A exception thrown by services and related modules when something goes wrong. |