32 lines
665 B
TypeScript
32 lines
665 B
TypeScript
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import * as fs from 'node:fs/promises';
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import type { PathLike } from 'node:fs';
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/**
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* `fs.createWriteStream()`相当のことを行う`WritableStream` (Web標準)
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*/
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export class FileWriterStream extends WritableStream<Uint8Array> {
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constructor(path: PathLike) {
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let file: fs.FileHandle | null = null;
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super({
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start: async () => {
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file = await fs.open(path, 'a');
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},
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write: async (chunk, controller) => {
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if (file === null) {
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controller.error();
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throw new Error();
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}
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await file.write(chunk);
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},
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close: async () => {
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await file?.close();
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},
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abort: async () => {
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await file?.close();
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},
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});
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}
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}
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