Converting file bytes into base64 - GraphQL api

[DevShivmohan]

In GraphQL api we need to send the file bytes into string as a response

• Read file bytes and convert it into Base64 string.
• Then pass that string into response.
• Frontend should be responsible for decode that encoded string and convert it into respective format.

  @GraphQLQuery(name = "downloadReport")
  public FileDownloadResponseDTO downloadReport() throws IOException {
      final InputStream inputStream=new FileInputStream("/home/shiv/Downloads/Shiv_resume_28_Nov_2023.pdf");
      final var reportIntoByteArrayToString= Base64.getEncoder().encodeToString(inputStream.readAllBytes());
      inputStream.close();
      System.out.println(reportIntoByteArrayToString);
      return FileDownloadResponseDTO.builder().contentType("application/pdf").content(reportIntoByteArrayToString).build();
  }

• copy that string of response and paste it into online converter tool.
• 
• And paste it here.
• 
• Click convert to pdf button.
• Done