File Upload Process Http Parameters (Angular)

upload.service.ts

uploadFile(fileInfo: any): Observable<any> {
    const headers: HttpHeaders = new HttpHeaders({
        'Accept': 'application/json',
        'Content-Type': fileInfo.file.type,
        'X-Meta-Strategy': '1',
        'X-File-Size-Sig': fileInfo.signature
    });
    return this.http.put(fileInfo.url, fileInfo.file, {
        headers: headers,
        reportProgress: true,
        observe: 'events'
    });
}