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When compacting the receive buffer don't copy unused buffer space

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When compacting the receive buffer, we should only copy the bytes
between _rQi and _rQlen (the index of the first unread byte, and the
next write position).

Previously, we copied everything for _rQi up untill the end of the
buffer.
This commit is contained in:
Jesper Alf Dam 2019-08-07 11:12:35 +02:00 committed by Lauri Kasanen
parent 09de4b8349
commit b0896c8859
1 changed files with 3 additions and 3 deletions
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6
kasmweb/core/websock.js
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@ -247,12 +247,12 @@ export default class Websock {
if (resizeNeeded) {
const old_rQbuffer = this._rQ.buffer;
this._rQ = new Uint8Array(this._rQbufferSize);
this._rQ.set(new Uint8Array(old_rQbuffer, this._rQi));
this._rQ.set(new Uint8Array(old_rQbuffer, this._rQi, this._rQlen - this._rQi));
} else {
if (ENABLE_COPYWITHIN) {
this._rQ.copyWithin(0, this._rQi);
this._rQ.copyWithin(0, this._rQi, this._rQlen);
} else {
this._rQ.set(new Uint8Array(this._rQ.buffer, this._rQi));
this._rQ.set(new Uint8Array(this._rQ.buffer, this._rQi, this._rQlen - this._rQi));
}
}