47 lines
1.2 KiB
JavaScript
47 lines
1.2 KiB
JavaScript
import React from 'react';
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import useIsMounted from 'effects/use-is-mounted';
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// Returns a blob from the download path
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export default function useFileStream(fileStream) {
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const isMounted = useIsMounted();
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const [state, setState] = React.useState({
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error: false,
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loading: true,
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content: null,
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});
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React.useEffect(() => {
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if (fileStream && isMounted.current) {
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let chunks = [];
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const stream = fileStream();
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// Handle steam chunk recived
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stream.on('data', chunk => {
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if (isMounted.current) {
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chunks.push(chunk);
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} else {
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// Cancel stream if component is not mounted:
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// The user has left the viewer page
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stream.destroy();
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}
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});
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// Handle stream ended
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stream.on('end', () => {
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if (isMounted.current) {
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const buffer = Buffer.concat(chunks);
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const blob = new Blob([buffer]);
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setState({ content: blob, loading: false });
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}
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});
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// Handle stream error
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stream.on('error', () => {
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if (isMounted.current) {
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setState({ error: true, loading: false });
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}
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});
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}
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}, [fileStream, isMounted]);
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return state;
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}
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