I am developing a rest end point to download a existing pdf file. I'm able to download PDF with size, but when I open, getting error as
'Adobe reader couldnot open it is either not supported file type or because file has been damaged'.
I have noticed that in postman, response header content type is application/pdf;charset=UTF-8. I'm not sure if this is the cause.
With simple spring boot application I'm able to download, but in our project when I implement the same code, it is not working.
@GetMapping( path= "/s3/downloads")
public ResponseEntity<byte[]> downloadFile()
{
InputStream in = getClass().getResourceAsStream("/com/consulting/cloud/filetransfers/rest/template_attendance_en_green_full.pdf");
byte[] generatedCertificate = null;
String downloadFileName = "pdfFile1.pdf";
ResponseEntity<byte[]> responseEntity = ResponseEntity.status( HttpStatus.NO_CONTENT ).body( generatedCertificate );
try {
generatedCertificate = StreamUtils.copyToByteArray(in);
HttpHeaders headers = new HttpHeaders();
headers.add("Access-Control-Allow-Origin", "*");
headers.setContentType( MediaType.APPLICATION_PDF );
headers.setContentLength( generatedCertificate.length );
headers.setContentDispositionFormData( "attachment", downloadFileName );
responseEntity = ResponseEntity.ok().headers( headers ).body( generatedCertificate );
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return responseEntity;
}
The file is opened as expected.
