Direct Upload to Azure

import React from 'react'; import FileUploader from 'devextreme-react/file-uploader'; import { LoadPanel } from 'devextreme-react/load-panel'; const endpointUrl = 'https://js.devexpress.com/Demos/Mvc/api/file-manager-azure-access'; const loadPanelPosition = { of: '#file-uploader' }; class App extends React.Component { constructor() { super(); this.state = { requests: [], loadPanelVisible: true, wrapperClassName: '' }; this.onRequestExecuted = this.onRequestExecuted.bind(this); gateway = new AzureGateway(endpointUrl, this.onRequestExecuted); this.checkAzureStatus(); } render() { return ( <div id="wrapper" className={this.state.wrapperClassName}> <LoadPanel visible={this.state.loadPanelVisible} position={loadPanelPosition} /> <div id="widget-area"> <FileUploader id="file-uploader" chunkSize={200000} maxFileSize={1048576} uploadChunk={this.uploadChunk} /> <div id="request-panel"> { this.state.requests.map((r, i) => { return <div key={i} className="request-info"> <div className="parameter-info"> <div className="parameter-name">Method:</div> <div className="parameter-value dx-theme-accent-as-text-color">{r.method}</div> </div> <div className="parameter-info"> <div className="parameter-name">Url path:</div> <div className="parameter-value dx-theme-accent-as-text-color">{r.urlPath}</div> </div> <div className="parameter-info"> <div className="parameter-name">Query string:</div> <div className="parameter-value dx-theme-accent-as-text-color">{r.queryString}</div> </div> <br /> </div>; }) } </div> </div> <div id="message-box"> To run the demo locally, specify your Azure storage account name, access key and container name in the web.config file. Refer to the <a href="https://js.devexpress.com/Demos/WidgetsGallery/Demo/FileUploader/AzureDirectUploading/React/Light/" target="_blank" rel="noopener noreferrer"> https://js.devexpress.com/Demos/WidgetsGallery/Demo/FileUploader/AzureDirectUploading/React/Light/</a> to see the demo online. </div> </div> ); } uploadChunk(file, uploadInfo) { let promise = null; if(uploadInfo.chunkIndex === 0) { promise = gateway.getUploadAccessUrl(file.name).done(accessUrl => { uploadInfo.customData.accessUrl = accessUrl; }); } else { promise = Promise.resolve(); } promise = promise.then(() => gateway.putBlock(uploadInfo.customData.accessUrl, uploadInfo.chunkIndex, uploadInfo.chunkBlob)); if(uploadInfo.chunkIndex === uploadInfo.chunkCount - 1) { promise = promise.then(() => gateway.putBlockList(uploadInfo.customData.accessUrl, uploadInfo.chunkCount)); } return promise; } checkAzureStatus() { fetch('https://js.devexpress.com/Demos/Mvc/api/file-manager-azure-status?widgetType=fileUploader') .then(response => response.json()) .then(result => { const className = result.active ? 'show-widget' : 'show-message'; this.setState({ wrapperClassName: className, loadPanelVisible: false }); }); } onRequestExecuted({ method, urlPath, queryString }) { const request = { method, urlPath, queryString }; this.setState({ requests: [request, ...this.state.requests] }); } } let gateway = null; export default App;