71 lines
1.9 KiB
TypeScript
71 lines
1.9 KiB
TypeScript
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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import {decompressZstdFrame} from '~/lib/libfluxcore';
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export type CompressionType = 'none' | 'zstd-stream' | (string & {});
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export class GatewayDecompressor {
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private readonly type: CompressionType;
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constructor(type: CompressionType) {
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this.type = type;
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}
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async decompress(data: ArrayBuffer): Promise<string> {
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const input = new Uint8Array(data);
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switch (this.type) {
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case 'none':
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return new TextDecoder().decode(input);
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case 'zstd-stream':
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return this.decompressZstd(input);
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default:
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throw new Error(`Unsupported compression type: ${this.type}`);
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}
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}
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private async decompressZstd(data: Uint8Array): Promise<string> {
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const wasmDecoded = await decompressZstdFrame(data);
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if (!wasmDecoded) {
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throw new Error('Gateway zstd WASM not available');
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}
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const decompressed = wasmDecoded;
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return new TextDecoder().decode(decompressed);
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}
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destroy(): void {}
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}
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export function getPreferredCompression(): CompressionType {
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return 'zstd-stream';
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}
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export function isCompressionSupported(type: CompressionType): boolean {
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switch (type) {
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case 'none':
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case 'zstd-stream':
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return true;
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default:
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return false;
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}
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}
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