import { b64 , resolveUrl , Tus } from 'ngx-uploadx' ; /**
 * Implements tus resumable upload protocol
 *
 *  https example export class TusExt extends Tus { async getFileUrl ( ) { this . offset = 0 ; this . chunkSize = this . file . size ; const encodedMetaData = b64 . serialize ( this . metadata ) ; const { body } = this . getChunk ( ) ; const headers = { 'Upload-Length' : `${ this . size }` , 'Upload-Metadata' : `${ encodedMetaData }` , 'Content-Type' : 'application/offset+octet-stream' , 'Upload-Offset' : `${ this . offset }` } ; await this . request ( { method : 'POST' , url : this . endpoint , headers , body } ) ; const location = this . getValueFromResponse ( 'location' ) ; if ( ! location ) { throw new Error ( 'Invalid or missing Location header' ) ; } this . offset = this . getOffsetFromResponse ( ) || this . size ; return resolveUrl ( location , this . endpoint ) ; } }