8a46155f91
This avoids trying to figure out how to fix concurrent writes conflicting with `lowdb` v2, see: https://github.com/typicode/lowdb/issues/478 .
43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
import { createWriteStream, unlink } from 'fs';
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import shortId from 'shortid';
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import UPLOAD_DIRECTORY_URL from './config/UPLOAD_DIRECTORY_URL.mjs';
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/**
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* Stores a GraphQL file upload in the filesystem.
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* @param {Promise<object>} upload GraphQL file upload.
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* @returns {Promise<string>} Resolves the stored file name.
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*/
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export default async function storeUpload(upload) {
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const { createReadStream, filename } = await upload;
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const stream = createReadStream();
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const storedFileName = `${shortId.generate()}-${filename}`;
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const storedFileUrl = new URL(storedFileName, UPLOAD_DIRECTORY_URL);
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// Store the file in the filesystem.
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await new Promise((resolve, reject) => {
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// Create a stream to which the upload will be written.
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const writeStream = createWriteStream(storedFileUrl);
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// When the upload is fully written, resolve the promise.
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writeStream.on('finish', resolve);
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// If there's an error writing the file, remove the partially written file
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// and reject the promise.
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writeStream.on('error', (error) => {
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unlink(storedFileUrl, () => {
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reject(error);
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});
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});
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// In Node.js <= v13, errors are not automatically propagated between piped
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// streams. If there is an error receiving the upload, destroy the write
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// stream with the corresponding error.
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stream.on('error', (error) => writeStream.destroy(error));
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// Pipe the upload into the write stream.
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stream.pipe(writeStream);
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});
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return storedFileName;
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}
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