51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
'use strict';
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const {ReadableWebToNodeStream} = require('readable-web-to-node-stream');
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const toBuffer = require('typedarray-to-buffer');
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const core = require('./core');
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async function fromStream(stream) {
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const readableWebToNodeStream = new ReadableWebToNodeStream(stream);
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const fileType = await core.fromStream(readableWebToNodeStream);
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await readableWebToNodeStream.close();
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return fileType;
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}
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async function fromBlob(blob) {
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const buffer = await convertBlobToBuffer(blob);
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return core.fromBuffer(buffer);
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}
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/**
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Convert Web API File to Node Buffer.
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@param {Blob} blob - Web API Blob.
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@returns {Promise<Buffer>}
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*/
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function convertBlobToBuffer(blob) {
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return new Promise((resolve, reject) => {
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const fileReader = new FileReader();
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fileReader.addEventListener('loadend', event => {
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let data = event.target.result;
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if (data instanceof ArrayBuffer) {
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data = toBuffer(new Uint8Array(event.target.result));
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}
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resolve(data);
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});
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fileReader.addEventListener('error', event => {
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reject(new Error(event.message));
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});
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fileReader.addEventListener('abort', event => {
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reject(new Error(event.type));
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});
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fileReader.readAsArrayBuffer(blob);
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});
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}
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Object.assign(module.exports, core, {
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fromStream,
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fromBlob
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});
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