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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
/*
* soup-websocket-extension.c
*
* Copyright (C) 2019 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "soup-websocket-extension.h"
/**
* SECTION:soup-websocket-extension
* @short_description: a WebSocket extension
* @see_also: #SoupSession, #SoupWebsocketExtensionManager
*
* SoupWebsocketExtension is the base class for WebSocket extension objects.
*
*/
/**
* SoupWebsocketExtension:
*
* Class for impelementing websocket extensions.
*/
/**
* SoupWebsocketExtensionClass:
* @name: the name of the extension
* @parent_class: the parent class
* @configure: called to configure the extension with the given parameters
* @get_request_params: called by the client to build the request header.
* It should include the parameters string starting with ';'
* @get_response_params: called by the server to build the response header.
* It should include the parameters string starting with ';'
* @process_outgoing_message: called to process the payload data of a message
* before it's sent. Reserved bits of the header should be changed.
* @process_incoming_message: called to process the payload data of a message
* after it's received. Reserved bits of the header should be cleared.
*
* The class structure for the SoupWebsocketExtension.
*
*/
G_DEFINE_ABSTRACT_TYPE (SoupWebsocketExtension, soup_websocket_extension, G_TYPE_OBJECT)
static void
soup_websocket_extension_init (SoupWebsocketExtension *extension)
{
}
static void
soup_websocket_extension_class_init (SoupWebsocketExtensionClass *auth_class)
{
}
/**
* soup_websocket_extension_configure:
* @extension: a #SoupWebsocketExtension
* @connection_type: either %SOUP_WEBSOCKET_CONNECTION_CLIENT or %SOUP_WEBSOCKET_CONNECTION_SERVER
* @params: (nullable): the parameters, or %NULL
* @error: return location for a #GError
*
* Configures @extension with the given @params
*
* Returns: %TRUE if extension could be configured with the given parameters, or %FALSE otherwise
*/
gboolean
soup_websocket_extension_configure (SoupWebsocketExtension *extension,
SoupWebsocketConnectionType connection_type,
GHashTable *params,
GError **error)
{
SoupWebsocketExtensionClass *klass;
g_return_val_if_fail (SOUP_IS_WEBSOCKET_EXTENSION (extension), FALSE);
g_return_val_if_fail (connection_type != SOUP_WEBSOCKET_CONNECTION_UNKNOWN, FALSE);
g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
klass = SOUP_WEBSOCKET_EXTENSION_GET_CLASS (extension);
if (!klass->configure)
return TRUE;
return klass->configure (extension, connection_type, params, error);
}
/**
* soup_websocket_extension_get_request_params:
* @extension: a #SoupWebsocketExtension
*
* Get the parameters strings to be included in the request header. If the extension
* doesn't include any parameter in the request, this function returns %NULL.
*
* Returns: (nullable) (transfer full): a new allocated string with the parameters
*
*/
char *
soup_websocket_extension_get_request_params (SoupWebsocketExtension *extension)
{
SoupWebsocketExtensionClass *klass;
g_return_val_if_fail (SOUP_IS_WEBSOCKET_EXTENSION (extension), NULL);
klass = SOUP_WEBSOCKET_EXTENSION_GET_CLASS (extension);
if (!klass->get_request_params)
return NULL;
return klass->get_request_params (extension);
}
/**
* soup_websocket_extension_get_response_params:
* @extension: a #SoupWebsocketExtension
*
* Get the parameters strings to be included in the response header. If the extension
* doesn't include any parameter in the response, this function returns %NULL.
*
* Returns: (nullable) (transfer full): a new allocated string with the parameters
*
*/
char *
soup_websocket_extension_get_response_params (SoupWebsocketExtension *extension)
{
SoupWebsocketExtensionClass *klass;
g_return_val_if_fail (SOUP_IS_WEBSOCKET_EXTENSION (extension), NULL);
klass = SOUP_WEBSOCKET_EXTENSION_GET_CLASS (extension);
if (!klass->get_response_params)
return NULL;
return klass->get_response_params (extension);
}
/**
* soup_websocket_extension_process_outgoing_message:
* @extension: a #SoupWebsocketExtension
* @header: (inout): the message header
* @payload: (transfer full): the payload data
* @error: return location for a #GError
*
* Process a message before it's sent. If the payload isn't changed the given
* @payload is just returned, otherwise g_bytes_unref() is called on the given
* @payload and a new #GBytes is returned with the new data.
*
* Extensions using reserved bits of the header will change them in @header.
*
* Returns: (transfer full): the message payload data, or %NULL in case of error
*
*/
GBytes *
soup_websocket_extension_process_outgoing_message (SoupWebsocketExtension *extension,
guint8 *header,
GBytes *payload,
GError **error)
{
SoupWebsocketExtensionClass *klass;
g_return_val_if_fail (SOUP_IS_WEBSOCKET_EXTENSION (extension), NULL);
g_return_val_if_fail (header != NULL, NULL);
g_return_val_if_fail (payload != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
klass = SOUP_WEBSOCKET_EXTENSION_GET_CLASS (extension);
if (!klass->process_outgoing_message)
return payload;
return klass->process_outgoing_message (extension, header, payload, error);
}
/**
* soup_websocket_extension_process_incoming_message:
* @extension: a #SoupWebsocketExtension
* @header: (inout): the message header
* @payload: (transfer full): the payload data
* @error: return location for a #GError
*
* Process a message after it's received. If the payload isn't changed the given
* @payload is just returned, otherwise g_bytes_unref() is called on the given
* @payload and a new #GBytes is returned with the new data.
*
* Extensions using reserved bits of the header will reset them in @header.
*
* Returns: (transfer full): the message payload data, or %NULL in case of error
*
*/
GBytes *
soup_websocket_extension_process_incoming_message (SoupWebsocketExtension *extension,
guint8 *header,
GBytes *payload,
GError **error)
{
SoupWebsocketExtensionClass *klass;
g_return_val_if_fail (SOUP_IS_WEBSOCKET_EXTENSION (extension), NULL);
g_return_val_if_fail (header != NULL, NULL);
g_return_val_if_fail (payload != NULL, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
klass = SOUP_WEBSOCKET_EXTENSION_GET_CLASS (extension);
if (!klass->process_incoming_message)
return payload;
return klass->process_incoming_message (extension, header, payload, error);
}
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