import {saveAs} from 'file-saver';
downloadFileService(url,opts){
return this._http.get(url,opts,{
responseType : 'blob',
headers:new HttpHeaders().append('Content-Type','application/json')
});
}
downloadFile(){
downloadFileService('url','options').subscribe((resp)=>{
saveAs(resp,'filename.txt')
},(err)=>{
console.log('downloadFile erro',err);
})
}
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