devextreme
Version:
JavaScript/TypeScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/__internal/ui/file_uploader/file_upload_strategy.chunks.base.js)
* Version: 25.2.5
* Build date: Fri Feb 20 2026
*
* Copyright (c) 2012 - 2026 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import Guid from "../../../core/guid";
import {
Deferred
} from "../../../core/utils/deferred";
import {
FileBlobReader
} from "../../ui/file_uploader/file_blob_reader";
import {
FileUploadStrategyBase
} from "../../ui/file_uploader/file_upload_strategy.base";
export class ChunksFileUploadStrategyBase extends FileUploadStrategyBase {
constructor(fileUploader) {
super(fileUploader);
const {
chunkSize: chunkSize
} = this.fileUploader.option();
this.chunkSize = chunkSize ?? 0
}
_uploadCore(file) {
const realFile = file.value;
const chunksData = {
name: realFile.name,
loadedBytes: 0,
type: realFile.type,
blobReader: new FileBlobReader(realFile, this.chunkSize),
guid: new Guid,
fileSize: realFile.size,
count: this._getFileChunksCount(realFile),
customData: {}
};
file.chunksData = chunksData;
this._sendChunk(file, chunksData)
}
_getFileChunksCount(jsFile) {
return 0 === jsFile.size ? 1 : Math.ceil(jsFile.size / this.chunkSize)
}
_sendChunk(file, chunksData) {
const chunk = chunksData.blobReader.read();
chunksData.currentChunk = chunk;
if (chunk) {
this._sendChunkCore(file, chunksData, chunk).done((() => {
var _chunk$blob;
if (file.isAborted) {
return
}
chunksData.loadedBytes += (null === (_chunk$blob = chunk.blob) || void 0 === _chunk$blob ? void 0 : _chunk$blob.size) ?? 0;
file.onProgress.fire({
loaded: chunksData.loadedBytes,
total: file.value.size
});
if (chunk.isCompleted) {
file.onLoad.fire()
}
setTimeout((() => this._sendChunk(file, chunksData)))
})).fail((error => {
if (this._shouldHandleError(file, error)) {
this._handleFileError(file, error)
}
}))
}
}
_sendChunkCore(_file, _chunksData, _chunk) {
return Deferred().reject()
}
_tryRaiseStartLoad(file) {
if (!file.isStartLoad) {
file.isStartLoad = true;
file.onLoadStart.fire()
}
}
_getEvent(_e) {
return null
}
_createUploadArgument(file) {
return this._createChunksInfo(file.chunksData)
}
_createChunksInfo(chunksData) {
var _chunksData$currentCh, _chunksData$currentCh2;
return {
bytesUploaded: (null === chunksData || void 0 === chunksData ? void 0 : chunksData.loadedBytes) ?? 0,
chunkCount: (null === chunksData || void 0 === chunksData ? void 0 : chunksData.count) ?? 0,
customData: (null === chunksData || void 0 === chunksData ? void 0 : chunksData.customData) ?? {},
chunkBlob: (null === chunksData || void 0 === chunksData || null === (_chunksData$currentCh = chunksData.currentChunk) || void 0 === _chunksData$currentCh ? void 0 : _chunksData$currentCh.blob) ?? new Blob,
chunkIndex: (null === chunksData || void 0 === chunksData || null === (_chunksData$currentCh2 = chunksData.currentChunk) || void 0 === _chunksData$currentCh2 ? void 0 : _chunksData$currentCh2.index) ?? 0
}
}
}