32 lines
886 B
TypeScript
32 lines
886 B
TypeScript
import * as fs from 'fs';
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import fileType = require('file-type');
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import checkSvg from '../misc/check-svg';
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export async function detectMine(path: string) {
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return new Promise<[string, string | null]>((res, rej) => {
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const readable = fs.createReadStream(path);
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readable
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.on('error', rej)
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.once('data', (buffer: Buffer) => {
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readable.destroy();
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const type = fileType(buffer);
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if (type) {
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if (type.mime == 'application/xml' && checkSvg(path)) {
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res(['image/svg+xml', 'svg']);
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} else {
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res([type.mime, type.ext]);
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}
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} else if (checkSvg(path)) {
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res(['image/svg+xml', 'svg']);
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} else {
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// 種類が同定できなかったら application/octet-stream にする
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res(['application/octet-stream', null]);
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}
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})
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.on('end', () => {
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// maybe 0 bytes
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res(['application/octet-stream', null]);
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});
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});
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}
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