Web File Mover

Web file mover is a collection of small helper methods for moving binary files from a server to the web, and from the web to the user's device.

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``ts
getFileFromServer(url: string): Promise
`

Calling this function with a url string will return a promise that will resolve with an ArrayBuffer of the file fetched.

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`ts
saveFileToDevice(arrayBuffer: ArrayBuffer, filename: string, mimeType?: string): void;
`

Calling this function with an ArrayBuffer and a file name will trigger a download of the file.

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`ts
fileToArrayBuffer(file: File): Promise
`

Calling this function with a File you will get a promise that will resolve with the file's contents in an ArrayBuffer.

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`ts
fileChunkToArrayBuffer(file: File, startOffset: number, chunkSize: number): Promise
`

Calling this function with a File, a startOffset and chunkSize will give you an ArrayBuffer containing a
piece of the file starting from startOffset with a byte length of chunkSize`.