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File Uploader

Direct Upload to Azure

The FileUploader widget supports direct-upload to blob storages. This demo illustrates how to configure the uploadChunk option to upload a large file directly to Azure Blob Storage without using a user's web server. All APIs that implement access to Azure Blob Storage on the client are stored in the azure-file-system.js file.

To implement file upload logic, use the uploadChunk option to specify how to process a connection request to the storage.

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<div id="wrapper" [class]="wrapperClassName"> <dx-load-panel [position]="{ of: '#file-uploader' }" [(visible)]="loadPanelVisible"> </dx-load-panel> <div id="widget-area"> <dx-file-uploader id="file-uploader" [chunkSize]="200000" [maxFileSize]="1048576" [uploadChunk]="uploadChunk"> </dx-file-uploader> <div id="request-panel"> <div class="request-info" *ngFor="let request of requests"> <div class="parameter-info"> <div class="parameter-name">Method:</div> <div class="parameter-value dx-theme-accent-as-text-color">{{request.method}}</div> </div> <div class="parameter-info"> <div class="parameter-name">Url path:</div> <div class="parameter-value dx-theme-accent-as-text-color">{{request.urlPath}}</div> </div> <div class="parameter-info"> <div class="parameter-name">Query string:</div> <div class="parameter-value dx-theme-accent-as-text-color">{{request.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/Angular/Light/" target="_blank" rel="noopener noreferrer"> https://js.devexpress.com/Demos/WidgetsGallery/Demo/FileUploader/AzureDirectUploading/Angular/Light/</a> to see the demo online. </div> </div>
import { NgModule, Component, enableProdMode } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { HttpClient, HttpClientModule } from '@angular/common/http'; import { DxFileUploaderModule, DxLoadPanelModule } from 'devextreme-angular'; if (!/localhost/.test(document.location.host)) { enableProdMode(); } @Component({ selector: 'demo-app', templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'], preserveWhitespaces: true }) export class AppComponent { requests: any[]; wrapperClassName: string; loadPanelVisible: boolean; constructor(http: HttpClient) { const endpointUrl = 'https://js.devexpress.com/Demos/Mvc/api/file-manager-azure-access'; gateway = new AzureGateway(endpointUrl, this.onRequestExecuted.bind(this)); this.requests = []; this.wrapperClassName = ''; this.loadPanelVisible = true; this.checkAzureStatus(http); } 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; } onRequestExecuted({method, urlPath, queryString}) { const request = { method, urlPath, queryString }; this.requests.unshift(request); } checkAzureStatus(http: HttpClient) { http.get('https://js.devexpress.com/Demos/Mvc/api/file-manager-azure-status?widgetType=fileManager') .toPromise() .then(result => { this.wrapperClassName = result.active ? 'show-widget' : 'show-message'; this.loadPanelVisible = false; }); } } let gateway = null; @NgModule({ imports: [ BrowserModule, DxFileUploaderModule, DxLoadPanelModule, HttpClientModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
#widget-area { visibility: hidden; } #message-box { display: none; } .show-widget #widget-area { visibility: visible; } .show-message #widget-area { display: none; } .show-message #message-box { display: block; } #request-panel { min-width: 505px; height: 400px; overflow-x: hidden; overflow-y: auto; padding: 18px; margin-top: 40px; background-color: rgba(191, 191, 191, 0.15); } #request-panel .parameter-info { display: flex; } .request-info .parameter-name { flex: 0 0 100px; } .request-info .parameter-name, .request-info .parameter-value { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/ System.config({ transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, }, paths: { 'npm:': 'https://unpkg.com/' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.4.5/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib/tslib.js', 'rxjs': 'npm:rxjs', 'devextreme': 'npm:devextreme@19.2', 'jszip': 'npm:jszip@3.1.3/dist/jszip.min.js', 'quill': 'npm:quill@1.3.7/dist/quill.js', 'devexpress-diagram': 'npm:devexpress-diagram@0.1.54', 'devexpress-gantt': 'npm:devexpress-gantt@0.0.29', 'devextreme-angular': 'npm:devextreme-angular@19.2' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, }, packageConfigPaths: [ "npm:*/package.json", "npm:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular@19.2/*/package.json", "npm:devextreme-angular@19.2/ui/*/package.json", ] });
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.7/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.7/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.7/css/dx-gantt.css" /> <script src="js/azure-file-system.js"></script> <script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script> <script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script> <script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script> <script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>