cms/drupal/includes/xmlrpcs.inc
changeset 541 e756a8c72c3d
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/includes/xmlrpcs.inc	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,394 @@
+<?php
+
+/**
+ * @file
+ * Provides API for defining and handling XML-RPC requests.
+ */
+
+/**
+ * Invokes XML-RPC methods on this server.
+ *
+ * @param array $callbacks
+ *   Either an associative array of external XML-RPC method names as keys with
+ *   the callbacks they map to as values, or a more complex structure
+ *   describing XML-RPC callbacks as returned from hook_xmlrpc().
+ */
+function xmlrpc_server($callbacks) {
+  $xmlrpc_server = new stdClass();
+  // Define built-in XML-RPC method names
+  $defaults = array(
+    'system.multicall' => 'xmlrpc_server_multicall',
+    array(
+      'system.methodSignature',
+      'xmlrpc_server_method_signature',
+      array('array', 'string'),
+      'Returns an array describing the return type and required parameters of a method.',
+    ),
+    array(
+      'system.getCapabilities',
+      'xmlrpc_server_get_capabilities',
+      array('struct'),
+      'Returns a struct describing the XML-RPC specifications supported by this server.',
+    ),
+    array(
+      'system.listMethods',
+      'xmlrpc_server_list_methods',
+      array('array'),
+      'Returns an array of available methods on this server.',
+    ),
+    array(
+      'system.methodHelp',
+      'xmlrpc_server_method_help',
+      array('string', 'string'),
+      'Returns a documentation string for the specified method.',
+    ),
+  );
+  // We build an array of all method names by combining the built-ins
+  // with those defined by modules implementing the _xmlrpc hook.
+  // Built-in methods are overridable.
+  $callbacks = array_merge($defaults, (array) $callbacks);
+  drupal_alter('xmlrpc', $callbacks);
+  foreach ($callbacks as $key => $callback) {
+    // we could check for is_array($callback)
+    if (is_int($key)) {
+      $method = $callback[0];
+      $xmlrpc_server->callbacks[$method] = $callback[1];
+      $xmlrpc_server->signatures[$method] = $callback[2];
+      $xmlrpc_server->help[$method] = $callback[3];
+    }
+    else {
+      $xmlrpc_server->callbacks[$key] = $callback;
+      $xmlrpc_server->signatures[$key] = '';
+      $xmlrpc_server->help[$key] = '';
+    }
+  }
+
+  $data = file_get_contents('php://input');
+  if (!$data) {
+    print 'XML-RPC server accepts POST requests only.';
+    drupal_exit();
+  }
+  $xmlrpc_server->message = xmlrpc_message($data);
+  if (!xmlrpc_message_parse($xmlrpc_server->message)) {
+    xmlrpc_server_error(-32700, t('Parse error. Request not well formed.'));
+  }
+  if ($xmlrpc_server->message->messagetype != 'methodCall') {
+    xmlrpc_server_error(-32600, t('Server error. Invalid XML-RPC. Request must be a methodCall.'));
+  }
+  if (!isset($xmlrpc_server->message->params)) {
+    $xmlrpc_server->message->params = array();
+  }
+  xmlrpc_server_set($xmlrpc_server);
+  $result = xmlrpc_server_call($xmlrpc_server, $xmlrpc_server->message->methodname, $xmlrpc_server->message->params);
+
+  if (is_object($result) && !empty($result->is_error)) {
+    xmlrpc_server_error($result);
+  }
+  // Encode the result
+  $r = xmlrpc_value($result);
+  // Create the XML
+  $xml = '
+<methodResponse>
+  <params>
+  <param>
+    <value>' . xmlrpc_value_get_xml($r) . '</value>
+  </param>
+  </params>
+</methodResponse>
+
+';
+  // Send it
+  xmlrpc_server_output($xml);
+}
+
+/**
+ * Throws an XML-RPC error.
+ *
+ * @param $error
+ *   An error object or integer error code.
+ * @param $message
+ *   (optional) The description of the error. Used only if an integer error
+ *   code was passed in.
+ */
+function xmlrpc_server_error($error, $message = FALSE) {
+  if ($message && !is_object($error)) {
+    $error = xmlrpc_error($error, $message);
+  }
+  xmlrpc_server_output(xmlrpc_error_get_xml($error));
+}
+
+/**
+ * Sends XML-RPC output to the browser.
+ *
+ * @param string $xml
+ *   XML to send to the browser.
+ */
+function xmlrpc_server_output($xml) {
+  $xml = '<?xml version="1.0"?>' . "\n" . $xml;
+  drupal_add_http_header('Content-Length', strlen($xml));
+  drupal_add_http_header('Content-Type', 'text/xml');
+  echo $xml;
+  drupal_exit();
+}
+
+/**
+ * Stores a copy of an XML-RPC request temporarily.
+ *
+ * @param object $xmlrpc_server
+ *   (optional) Request object created by xmlrpc_server(). Omit to leave the
+ *   previous server object saved.
+ *
+ * @return
+ *   The latest stored request.
+ *
+ * @see xmlrpc_server_get()
+ */
+function xmlrpc_server_set($xmlrpc_server = NULL) {
+  static $server;
+  if (!isset($server)) {
+    $server = $xmlrpc_server;
+  }
+  return $server;
+}
+
+/**
+ * Retrieves the latest stored XML-RPC request.
+ *
+ * @return object
+ *   The stored request.
+ *
+ * @see xmlrpc_server_set()
+ */
+function xmlrpc_server_get() {
+  return xmlrpc_server_set();
+}
+
+/**
+ * Dispatches an XML-RPC request and any parameters to the appropriate handler.
+ *
+ * @param object $xmlrpc_server
+ *   Object containing information about this XML-RPC server, the methods it
+ *   provides, their signatures, etc.
+ * @param string $methodname
+ *   The external XML-RPC method name; e.g., 'system.methodHelp'.
+ * @param array $args
+ *   Array containing any parameters that are to be sent along with the request.
+ *
+ * @return
+ *   The results of the call.
+ */
+function xmlrpc_server_call($xmlrpc_server, $methodname, $args) {
+  // Make sure parameters are in an array
+  if ($args && !is_array($args)) {
+    $args = array($args);
+  }
+  // Has this method been mapped to a Drupal function by us or by modules?
+  if (!isset($xmlrpc_server->callbacks[$methodname])) {
+    return xmlrpc_error(-32601, t('Server error. Requested method @methodname not specified.', array("@methodname" => $xmlrpc_server->message->methodname)));
+  }
+  $method = $xmlrpc_server->callbacks[$methodname];
+  $signature = $xmlrpc_server->signatures[$methodname];
+
+  // If the method has a signature, validate the request against the signature
+  if (is_array($signature)) {
+    $ok = TRUE;
+    $return_type = array_shift($signature);
+    // Check the number of arguments
+    if (count($args) != count($signature)) {
+      return xmlrpc_error(-32602, t('Server error. Wrong number of method parameters.'));
+    }
+    // Check the argument types
+    foreach ($signature as $key => $type) {
+      $arg = $args[$key];
+      switch ($type) {
+        case 'int':
+        case 'i4':
+          if (is_array($arg) || !is_int($arg)) {
+            $ok = FALSE;
+          }
+          break;
+
+        case 'base64':
+        case 'string':
+          if (!is_string($arg)) {
+            $ok = FALSE;
+          }
+          break;
+
+        case 'boolean':
+          if ($arg !== FALSE && $arg !== TRUE) {
+            $ok = FALSE;
+          }
+          break;
+
+        case 'float':
+        case 'double':
+          if (!is_float($arg)) {
+            $ok = FALSE;
+          }
+          break;
+
+        case 'date':
+        case 'dateTime.iso8601':
+          if (!$arg->is_date) {
+            $ok = FALSE;
+          }
+          break;
+      }
+      if (!$ok) {
+        return xmlrpc_error(-32602, t('Server error. Invalid method parameters.'));
+      }
+    }
+  }
+
+  if (!function_exists($method)) {
+    return xmlrpc_error(-32601, t('Server error. Requested function @method does not exist.', array("@method" => $method)));
+  }
+  // Call the mapped function
+  return call_user_func_array($method, $args);
+}
+
+/**
+ * Dispatches multiple XML-RPC requests.
+ *
+ * @param array $methodcalls
+ *   An array of XML-RPC requests to make. Each request is an array with the
+ *   following elements:
+ *   - methodName: Name of the method to invoke.
+ *   - params: Parameters to pass to the method.
+ *
+ * @return
+ *   An array of the results of each request.
+ *
+ * @see xmlrpc_server_call()
+ */
+function xmlrpc_server_multicall($methodcalls) {
+  // See http://www.xmlrpc.com/discuss/msgReader$1208
+  // To avoid multicall expansion attacks, limit the number of duplicate method
+  // calls allowed with a default of 1. Set to -1 for unlimited.
+  $duplicate_method_limit = variable_get('xmlrpc_multicall_duplicate_method_limit', 1);
+  $method_count = array();
+  $return = array();
+  $xmlrpc_server = xmlrpc_server_get();
+  foreach ($methodcalls as $call) {
+    $ok = TRUE;
+    if (!isset($call['methodName']) || !isset($call['params'])) {
+      $result = xmlrpc_error(3, t('Invalid syntax for system.multicall.'));
+      $ok = FALSE;
+    }
+    $method = $call['methodName'];
+    $method_count[$method] = isset($method_count[$method]) ? $method_count[$method] + 1 : 1;
+    $params = $call['params'];
+    if ($method == 'system.multicall') {
+      $result = xmlrpc_error(-32600, t('Recursive calls to system.multicall are forbidden.'));
+    }
+    elseif ($duplicate_method_limit > 0 && $method_count[$method] > $duplicate_method_limit) {
+      $result = xmlrpc_error(-156579, t('Too many duplicate method calls in system.multicall.'));
+    }
+    elseif ($ok) {
+      $result = xmlrpc_server_call($xmlrpc_server, $method, $params);
+    }
+    if (is_object($result) && !empty($result->is_error)) {
+      $return[] = array(
+        'faultCode' => $result->code,
+        'faultString' => $result->message,
+      );
+    }
+    else {
+      $return[] = array($result);
+    }
+  }
+  return $return;
+}
+
+/**
+ * Lists the methods available on this XML-RPC server.
+ *
+ * XML-RPC method system.listMethods maps to this function.
+ *
+ * @return array
+ *   Array of the names of methods available on this server.
+ */
+function xmlrpc_server_list_methods() {
+  $xmlrpc_server = xmlrpc_server_get();
+  return array_keys($xmlrpc_server->callbacks);
+}
+
+/**
+ * Returns a list of the capabilities of this server.
+ *
+ * XML-RPC method system.getCapabilities maps to this function.
+ *
+ * @return array
+ *   Array of server capabilities.
+ *
+ * @see http://groups.yahoo.com/group/xml-rpc/message/2897
+ */
+function xmlrpc_server_get_capabilities() {
+  return array(
+    'xmlrpc' => array(
+      'specUrl' => 'http://www.xmlrpc.com/spec',
+      'specVersion' => 1,
+    ),
+    'faults_interop' => array(
+      'specUrl' => 'http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
+      'specVersion' => 20010516,
+    ),
+    'system.multicall' => array(
+      'specUrl' => 'http://www.xmlrpc.com/discuss/msgReader$1208',
+      'specVersion' => 1,
+    ),
+    'introspection' => array(
+      'specUrl' => 'http://scripts.incutio.com/xmlrpc/introspection.html',
+      'specVersion' => 1,
+    ),
+  );
+}
+
+/**
+ * Returns one method signature for a function.
+ *
+ * This is the function mapped to the XML-RPC method system.methodSignature.
+ *
+ * A method signature is an array of the input and output types of a method. For
+ * instance, the method signature of this function is array('array', 'string'),
+ * because it takes an array and returns a string.
+ *
+ * @param string $methodname
+ *   Name of method to return a method signature for.
+ *
+ * @return array
+ *   An array of arrays of types, each of the arrays representing one method
+ *   signature of the function that $methodname maps to.
+ */
+function xmlrpc_server_method_signature($methodname) {
+  $xmlrpc_server = xmlrpc_server_get();
+  if (!isset($xmlrpc_server->callbacks[$methodname])) {
+    return xmlrpc_error(-32601, t('Server error. Requested method @methodname not specified.', array("@methodname" => $methodname)));
+  }
+  if (!is_array($xmlrpc_server->signatures[$methodname])) {
+    return xmlrpc_error(-32601, t('Server error. Requested method @methodname signature not specified.', array("@methodname" => $methodname)));
+  }
+  // We array of types
+  $return = array();
+  foreach ($xmlrpc_server->signatures[$methodname] as $type) {
+    $return[] = $type;
+  }
+  return array($return);
+}
+
+/**
+ * Returns the help for an XML-RPC method.
+ *
+ * XML-RPC method system.methodHelp maps to this function.
+ *
+ * @param string $method
+ *   Name of method for which we return a help string.
+ *
+ * @return string
+ *   Help text for $method.
+ */
+function xmlrpc_server_method_help($method) {
+  $xmlrpc_server = xmlrpc_server_get();
+  return $xmlrpc_server->help[$method];
+}