/
githubmirror
/
pdf.js
Обзор
Документация
Войти
/
githubmirror
/
pdf.js
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
src/core/decrypt_stream.js
55 строк
1 KB
Jonas Jenwald
Simplify the `nextChunk` handling in the `DecryptStream` class
30 апр 2026, 12:40
30 апр 2026, 12:40
f26b98c
Код
Авторство
О чём код?
/* Copyright 2012 Mozilla Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import { DecodeStream } from "./decode_stream.js"; const chunkSize = 512; class DecryptStream extends DecodeStream { #nextChunk = null; constructor(str, maybeLength, decrypt) { super(maybeLength); this.stream = str; this.dict = str.dict; this.decrypt = decrypt; } readBlock() { let chunk = this.#nextChunk ?? this.stream.getBytes(chunkSize); if (!chunk?.length) { this.eof = true; return; } this.#nextChunk = this.stream.getBytes(chunkSize); const hasMoreData = this.#nextChunk?.length > 0; const decrypt = this.decrypt; chunk = decrypt(chunk, !hasMoreData); const bufferLength = this.bufferLength, newLength = bufferLength + chunk.length, buffer = this.ensureBuffer(newLength); buffer.set(chunk, bufferLength); this.bufferLength = newLength; } getOriginalStream() { return this; } } export { DecryptStream };