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Retspen 2015-03-11 16:17:42 +02:00
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"use strict";
/*
Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
This file is part of spice-html5.
spice-html5 is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
spice-html5 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with spice-html5. If not, see <http://www.gnu.org/licenses/>.
*/
/*----------------------------------------------------------------------------
** SpiceMainConn
** This is the master Javascript class for establishing and
** managing a connection to a Spice Server.
**
** Invocation: You must pass an object with properties as follows:
** uri (required) Uri of a WebSocket listener that is
** connected to a spice server.
** password (required) Password to send to the spice server
** message_id (optional) Identifier of an element in the DOM
** where SpiceConn will write messages.
** It will use classes spice-messages-x,
** where x is one of info, warning, or error.
** screen_id (optional) Identifier of an element in the DOM
** where SpiceConn will create any new
** client screens. This is the main UI.
** dump_id (optional) If given, an element to use for
** dumping every single image + canvas drawn.
** Sometimes useful for debugging.
** onerror (optional) If given, a function to receive async
** errors. Note that you should also catch
** errors for ones that occur inline
** onagent (optional) If given, a function to be called when
** a VD agent is connected; a good opportunity
** to request a resize
**
** Throws error if there are troubles. Requires a modern (by 2012 standards)
** browser, including WebSocket and WebSocket.binaryType == arraybuffer
**
**--------------------------------------------------------------------------*/
function SpiceMainConn()
{
if (typeof WebSocket === "undefined")
throw new Error("WebSocket unavailable. You need to use a different browser.");
SpiceConn.apply(this, arguments);
this.agent_msg_queue = [];
this.file_xfer_tasks = {};
this.file_xfer_task_id = 0;
this.file_xfer_read_queue = [];
}
SpiceMainConn.prototype = Object.create(SpiceConn.prototype);
SpiceMainConn.prototype.process_channel_message = function(msg)
{
if (msg.type == SPICE_MSG_MAIN_INIT)
{
this.log_info("Connected to " + this.ws.url);
this.report_success("Connected")
this.main_init = new SpiceMsgMainInit(msg.data);
this.connection_id = this.main_init.session_id;
this.agent_tokens = this.main_init.agent_tokens;
if (DEBUG > 0)
{
// FIXME - there is a lot here we don't handle; mouse modes, agent,
// ram_hint, multi_media_time
this.log_info("session id " + this.main_init.session_id +
" ; display_channels_hint " + this.main_init.display_channels_hint +
" ; supported_mouse_modes " + this.main_init.supported_mouse_modes +
" ; current_mouse_mode " + this.main_init.current_mouse_mode +
" ; agent_connected " + this.main_init.agent_connected +
" ; agent_tokens " + this.main_init.agent_tokens +
" ; multi_media_time " + this.main_init.multi_media_time +
" ; ram_hint " + this.main_init.ram_hint);
}
this.handle_mouse_mode(this.main_init.current_mouse_mode,
this.main_init.supported_mouse_modes);
if (this.main_init.agent_connected)
this.connect_agent();
var attach = new SpiceMiniData;
attach.type = SPICE_MSGC_MAIN_ATTACH_CHANNELS;
attach.size = attach.buffer_size();
this.send_msg(attach);
return true;
}
if (msg.type == SPICE_MSG_MAIN_MOUSE_MODE)
{
var mode = new SpiceMsgMainMouseMode(msg.data);
DEBUG > 0 && this.log_info("Mouse supported modes " + mode.supported_modes + "; current " + mode.current_mode);
this.handle_mouse_mode(mode.current_mode, mode.supported_modes);
return true;
}
if (msg.type == SPICE_MSG_MAIN_CHANNELS_LIST)
{
var i;
var chans;
DEBUG > 0 && console.log("channels");
chans = new SpiceMsgChannels(msg.data);
for (i = 0; i < chans.channels.length; i++)
{
var conn = {
uri: this.ws.url,
parent: this,
connection_id : this.connection_id,
type : chans.channels[i].type,
chan_id : chans.channels[i].id
};
if (chans.channels[i].type == SPICE_CHANNEL_DISPLAY)
this.display = new SpiceDisplayConn(conn);
else if (chans.channels[i].type == SPICE_CHANNEL_INPUTS)
{
this.inputs = new SpiceInputsConn(conn);
this.inputs.mouse_mode = this.mouse_mode;
}
else if (chans.channels[i].type == SPICE_CHANNEL_CURSOR)
this.cursor = new SpiceCursorConn(conn);
else if (chans.channels[i].type == SPICE_CHANNEL_PLAYBACK)
this.cursor = new SpicePlaybackConn(conn);
else
{
this.log_err("Channel type " + chans.channels[i].type + " unknown.");
if (! ("extra_channels" in this))
this.extra_channels = [];
this.extra_channels[i] = new SpiceConn(conn);
}
}
return true;
}
if (msg.type == SPICE_MSG_MAIN_AGENT_CONNECTED)
{
this.connect_agent();
return true;
}
if (msg.type == SPICE_MSG_MAIN_AGENT_CONNECTED_TOKENS)
{
var connected_tokens = new SpiceMsgMainAgentTokens(msg.data);
this.agent_tokens = connected_tokens.num_tokens;
this.connect_agent();
return true;
}
if (msg.type == SPICE_MSG_MAIN_AGENT_TOKEN)
{
var remaining_tokens, tokens = new SpiceMsgMainAgentTokens(msg.data);
this.agent_tokens += tokens.num_tokens;
this.send_agent_message_queue();
remaining_tokens = this.agent_tokens;
while (remaining_tokens > 0 && this.file_xfer_read_queue.length > 0)
{
var xfer_task = this.file_xfer_read_queue.shift();
this.file_xfer_read(xfer_task, xfer_task.read_bytes);
remaining_tokens--;
}
return true;
}
if (msg.type == SPICE_MSG_MAIN_AGENT_DISCONNECTED)
{
this.agent_connected = false;
return true;
}
if (msg.type == SPICE_MSG_MAIN_AGENT_DATA)
{
var agent_data = new SpiceMsgMainAgentData(msg.data);
if (agent_data.type == VD_AGENT_ANNOUNCE_CAPABILITIES)
{
var agent_caps = new VDAgentAnnounceCapabilities(agent_data.data);
if (agent_caps.request)
this.announce_agent_capabilities(0);
return true;
}
else if (agent_data.type == VD_AGENT_FILE_XFER_STATUS)
{
this.handle_file_xfer_status(new VDAgentFileXferStatusMessage(agent_data.data));
return true;
}
return false;
}
return false;
}
SpiceMainConn.prototype.stop = function(msg)
{
this.state = "closing";
if (this.inputs)
{
this.inputs.cleanup();
this.inputs = undefined;
}
if (this.cursor)
{
this.cursor.cleanup();
this.cursor = undefined;
}
if (this.display)
{
this.display.cleanup();
this.display.destroy_surfaces();
this.display = undefined;
}
this.cleanup();
if ("extra_channels" in this)
for (var e in this.extra_channels)
this.extra_channels[e].cleanup();
this.extra_channels = undefined;
}
SpiceMainConn.prototype.send_agent_message_queue = function(message)
{
if (!this.agent_connected)
return;
if (message)
this.agent_msg_queue.push(message);
while (this.agent_tokens > 0 && this.agent_msg_queue.length > 0)
{
var mr = this.agent_msg_queue.shift();
this.send_msg(mr);
this.agent_tokens--;
}
}
SpiceMainConn.prototype.send_agent_message = function(type, message)
{
var agent_data = new SpiceMsgcMainAgentData(type, message);
var sb = 0, maxsize = VD_AGENT_MAX_DATA_SIZE - SpiceMiniData.prototype.buffer_size();
var data = new ArrayBuffer(agent_data.buffer_size());
agent_data.to_buffer(data);
while (sb < agent_data.buffer_size())
{
var eb = Math.min(sb + maxsize, agent_data.buffer_size());
var mr = new SpiceMiniData();
mr.type = SPICE_MSGC_MAIN_AGENT_DATA;
mr.size = eb - sb;
mr.data = data.slice(sb, eb);
this.send_agent_message_queue(mr);
sb = eb;
}
}
SpiceMainConn.prototype.announce_agent_capabilities = function(request)
{
var caps = new VDAgentAnnounceCapabilities(request, (1 << VD_AGENT_CAP_MOUSE_STATE) |
(1 << VD_AGENT_CAP_MONITORS_CONFIG) |
(1 << VD_AGENT_CAP_REPLY));
this.send_agent_message(VD_AGENT_ANNOUNCE_CAPABILITIES, caps);
}
SpiceMainConn.prototype.resize_window = function(flags, width, height, depth, x, y)
{
var monitors_config = new VDAgentMonitorsConfig(flags, width, height, depth, x, y);
this.send_agent_message(VD_AGENT_MONITORS_CONFIG, monitors_config);
}
SpiceMainConn.prototype.file_xfer_start = function(file)
{
var task_id, xfer_start, task;
task_id = this.file_xfer_task_id++;
task = new SpiceFileXferTask(task_id, file);
task.create_progressbar();
this.file_xfer_tasks[task_id] = task;
xfer_start = new VDAgentFileXferStartMessage(task_id, file.name, file.size);
this.send_agent_message(VD_AGENT_FILE_XFER_START, xfer_start);
}
SpiceMainConn.prototype.handle_file_xfer_status = function(file_xfer_status)
{
var xfer_error, xfer_task;
if (!this.file_xfer_tasks[file_xfer_status.id])
{
return;
}
xfer_task = this.file_xfer_tasks[file_xfer_status.id];
switch (file_xfer_status.result)
{
case VD_AGENT_FILE_XFER_STATUS_CAN_SEND_DATA:
this.file_xfer_read(xfer_task);
return;
case VD_AGENT_FILE_XFER_STATUS_CANCELLED:
xfer_error = "transfer is cancelled by spice agent";
break;
case VD_AGENT_FILE_XFER_STATUS_ERROR:
xfer_error = "some errors occurred in the spice agent";
break;
case VD_AGENT_FILE_XFER_STATUS_SUCCESS:
break;
default:
xfer_error = "unhandled status type: " + file_xfer_status.result;
break;
}
this.file_xfer_completed(xfer_task, xfer_error)
}
SpiceMainConn.prototype.file_xfer_read = function(file_xfer_task, start_byte)
{
var FILE_XFER_CHUNK_SIZE = 32 * VD_AGENT_MAX_DATA_SIZE;
var _this = this;
var sb, eb;
var slice, reader;
if (!file_xfer_task ||
!this.file_xfer_tasks[file_xfer_task.id] ||
(start_byte > 0 && start_byte == file_xfer_task.file.size))
{
return;
}
if (file_xfer_task.cancelled)
{
var xfer_status = new VDAgentFileXferStatusMessage(file_xfer_task.id,
VD_AGENT_FILE_XFER_STATUS_CANCELLED);
this.send_agent_message(VD_AGENT_FILE_XFER_STATUS, xfer_status);
delete this.file_xfer_tasks[file_xfer_task.id];
return;
}
sb = start_byte || 0,
eb = Math.min(sb + FILE_XFER_CHUNK_SIZE, file_xfer_task.file.size);
if (!this.agent_tokens)
{
file_xfer_task.read_bytes = sb;
this.file_xfer_read_queue.push(file_xfer_task);
return;
}
reader = new FileReader();
reader.onload = function(e)
{
var xfer_data = new VDAgentFileXferDataMessage(file_xfer_task.id,
e.target.result.byteLength,
e.target.result);
_this.send_agent_message(VD_AGENT_FILE_XFER_DATA, xfer_data);
_this.file_xfer_read(file_xfer_task, eb);
file_xfer_task.update_progressbar(eb);
};
slice = file_xfer_task.file.slice(sb, eb);
reader.readAsArrayBuffer(slice);
}
SpiceMainConn.prototype.file_xfer_completed = function(file_xfer_task, error)
{
if (error)
this.log_err(error);
else
this.log_info("transfer of '" + file_xfer_task.file.name +"' was successful");
file_xfer_task.remove_progressbar();
delete this.file_xfer_tasks[file_xfer_task.id];
}
SpiceMainConn.prototype.connect_agent = function()
{
this.agent_connected = true;
var agent_start = new SpiceMsgcMainAgentStart(~0);
var mr = new SpiceMiniData();
mr.build_msg(SPICE_MSGC_MAIN_AGENT_START, agent_start);
this.send_msg(mr);
this.announce_agent_capabilities(1);
if (this.onagent !== undefined)
this.onagent(this);
}
SpiceMainConn.prototype.handle_mouse_mode = function(current, supported)
{
this.mouse_mode = current;
if (current != SPICE_MOUSE_MODE_CLIENT && (supported & SPICE_MOUSE_MODE_CLIENT))
{
var mode_request = new SpiceMsgcMainMouseModeRequest(SPICE_MOUSE_MODE_CLIENT);
var mr = new SpiceMiniData();
mr.build_msg(SPICE_MSGC_MAIN_MOUSE_MODE_REQUEST, mode_request);
this.send_msg(mr);
}
if (this.inputs)
this.inputs.mouse_mode = current;
}