67 lines
1.9 KiB
JavaScript
67 lines
1.9 KiB
JavaScript
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/*
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* noVNC: HTML5 VNC client
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* Copyright (C) 2020 The noVNC Authors
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* Licensed under MPL 2.0 (see LICENSE.txt)
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*
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* See README.md for usage and integration instructions.
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*/
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import { inflateInit, inflate, inflateReset } from "../vendor/pako/lib/zlib/inflate.js";
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import ZStream from "../vendor/pako/lib/zlib/zstream.js";
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export default class Inflate {
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constructor() {
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this.strm = new ZStream();
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this.chunkSize = 1024 * 10 * 10;
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this.strm.output = new Uint8Array(this.chunkSize);
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this.windowBits = 5;
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inflateInit(this.strm, this.windowBits);
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}
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setInput(data) {
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if (!data) {
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//FIXME: flush remaining data.
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/* eslint-disable camelcase */
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this.strm.input = null;
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this.strm.avail_in = 0;
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this.strm.next_in = 0;
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} else {
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this.strm.input = data;
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this.strm.avail_in = this.strm.input.length;
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this.strm.next_in = 0;
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/* eslint-enable camelcase */
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}
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}
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inflate(expected) {
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// resize our output buffer if it's too small
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// (we could just use multiple chunks, but that would cause an extra
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// allocation each time to flatten the chunks)
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if (expected > this.chunkSize) {
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this.chunkSize = expected;
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this.strm.output = new Uint8Array(this.chunkSize);
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}
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/* eslint-disable camelcase */
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this.strm.next_out = 0;
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this.strm.avail_out = expected;
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/* eslint-enable camelcase */
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let ret = inflate(this.strm, 0); // Flush argument not used.
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if (ret < 0) {
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throw new Error("zlib inflate failed");
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}
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if (this.strm.next_out != expected) {
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throw new Error("Incomplete zlib block");
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}
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return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
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}
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reset() {
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inflateReset(this.strm);
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}
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}
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