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React File Uploader - Chunk Uploading
This demo shows how to upload files in chunks. The chunkSize property specifies their size (in this case, 0.2MB). You should ensure the server can process chunks. See an example of the server implementation under the FileUploaderController tab in the ASP.NET MVC version of this demo.
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Backend API
x
import React, { useCallback, useState } from 'react';
import FileUploader, { FileUploaderTypes } from 'devextreme-react/file-uploader';
function getValueInKb(value: number) {
return `${(value / 1024).toFixed(0)}kb`;
}
export default function App() {
const [chunks, setChunks] = useState([]);
const onUploadProgress = useCallback((e: FileUploaderTypes.ProgressEvent) => {
const chunk = {
segmentSize: e.segmentSize,
bytesLoaded: e.bytesLoaded,
bytesTotal: e.bytesTotal,
};
setChunks([...chunks, chunk]);
}, [chunks, setChunks]);
const onUploadStarted = useCallback(() => {
setChunks([]);
}, [setChunks]);
return (
<React.Fragment>
<FileUploader
name="file"
accept="image/*"
uploadUrl="https://js.devexpress.com/Demos/WidgetsGalleryDataService/api/ChunkUpload"
chunkSize={200000}
onUploadStarted={onUploadStarted}
onProgress={onUploadProgress}
/>
<span className="note">Allowed file extensions: <span>.jpg, .jpeg, .gif, .png</span>.</span>
<span className="note">Maximum file size: <span>4 MB.</span></span>
<div className="chunk-panel">
{
chunks.map((c, i) => (
<div key={i}>
<span>Chunk size:</span>
<span className="segment-size">{getValueInKb(c.segmentSize)}</span>
<span>, Uploaded:</span>
<span className="loaded-size">{getValueInKb(c.bytesLoaded)}</span>
<span>/</span>
<span className="total-size">{getValueInKb(c.bytesTotal)}</span>
</div>
))
}
</div>
</React.Fragment>
);
}
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