mirror of
https://github.com/retspen/webvirtcloud
synced 2024-12-26 08:05:22 +00:00
123 lines
3.9 KiB
JavaScript
123 lines
3.9 KiB
JavaScript
"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/>.
|
|
*/
|
|
|
|
/*--------------------------------------------------------------------------------------
|
|
** SpiceWireReader
|
|
** This class will receive messages from a WebSocket and relay it to a given
|
|
** callback. It will optionally save and pass along a header, useful in processing
|
|
** the mini message format.
|
|
**--------------------------------------------------------------------------------------*/
|
|
function SpiceWireReader(sc, callback)
|
|
{
|
|
this.sc = sc;
|
|
this.callback = callback;
|
|
this.needed = 0;
|
|
|
|
this.buffers = [];
|
|
|
|
this.sc.ws.wire_reader = this;
|
|
this.sc.ws.binaryType = "arraybuffer";
|
|
this.sc.ws.addEventListener('message', wire_blob_catcher);
|
|
}
|
|
|
|
SpiceWireReader.prototype =
|
|
{
|
|
|
|
/*------------------------------------------------------------------------
|
|
** Process messages coming in from our WebSocket
|
|
**----------------------------------------------------------------------*/
|
|
inbound: function (mb)
|
|
{
|
|
var at;
|
|
|
|
/* Just buffer if we don't need anything yet */
|
|
if (this.needed == 0)
|
|
{
|
|
this.buffers.push(mb);
|
|
return;
|
|
}
|
|
|
|
/* Optimization - if we have just one inbound block, and it's
|
|
suitable for our needs, just use it. */
|
|
if (this.buffers.length == 0 && mb.byteLength >= this.needed)
|
|
{
|
|
if (mb.byteLength > this.needed)
|
|
{
|
|
this.buffers.push(mb.slice(this.needed));
|
|
mb = mb.slice(0, this.needed);
|
|
}
|
|
this.callback.call(this.sc, mb,
|
|
this.saved_msg_header || undefined);
|
|
}
|
|
else
|
|
{
|
|
this.buffers.push(mb);
|
|
}
|
|
|
|
|
|
/* If we have fragments that add up to what we need, combine them */
|
|
/* FIXME - it would be faster to revise the processing code to handle
|
|
** multiple fragments directly. Essentially, we should be
|
|
** able to do this without any slice() or combine_array_buffers() calls */
|
|
while (this.buffers.length > 1 && this.buffers[0].byteLength < this.needed)
|
|
{
|
|
var mb1 = this.buffers.shift();
|
|
var mb2 = this.buffers.shift();
|
|
|
|
this.buffers.unshift(combine_array_buffers(mb1, mb2));
|
|
}
|
|
|
|
|
|
while (this.buffers.length > 0 && this.buffers[0].byteLength >= this.needed)
|
|
{
|
|
mb = this.buffers.shift();
|
|
if (mb.byteLength > this.needed)
|
|
{
|
|
this.buffers.unshift(mb.slice(this.needed));
|
|
mb = mb.slice(0, this.needed);
|
|
}
|
|
this.callback.call(this.sc, mb,
|
|
this.saved_msg_header || undefined);
|
|
}
|
|
|
|
},
|
|
|
|
request: function(n)
|
|
{
|
|
this.needed = n;
|
|
},
|
|
|
|
save_header: function(h)
|
|
{
|
|
this.saved_msg_header = h;
|
|
},
|
|
|
|
clear_header: function()
|
|
{
|
|
this.saved_msg_header = undefined;
|
|
},
|
|
}
|
|
|
|
function wire_blob_catcher(e)
|
|
{
|
|
DEBUG > 1 && console.log(">> WebSockets.onmessage");
|
|
DEBUG > 1 && console.log("id " + this.wire_reader.sc.connection_id +"; type " + this.wire_reader.sc.type);
|
|
SpiceWireReader.prototype.inbound.call(this.wire_reader, e.data);
|
|
}
|