Dart: makes an https download

main.dart

//import 'dart:io';

//import 'dart:convert';
//const c = [0, 0, 184, 84, 0, 2, 40, 3, 100, 65, 36, 97, 0, 1, 0, 0, 0, 0, 0, 0, 8, 252, 0, 0, 0, 2, 167, 120, 119, 177, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 115, 0, 0, 0, 0, 12, 0, 0, 1, 0];
/// @history Create by Sdl on Friday April 21th 2023 

/// Expecte results:
/// {cache-control: max-age:0, content-length: 24, content-md5: qVT+sY2zlNke425Qebybmw==, content-type: application/octet-stream, date: Fri, 21 Apr 2023 07:35:20 GMT, etag: 0x8DB41BEC85E6579, last-modified: Thu, 20 Apr 2023 16:46:26 GMT, x-ms-blob-type: BlockBlob, x-ms-lease-status: unlocked, x-ms-request-id: cbe6933b-c01e-0002-8023-747c9b000000, x-ms-version: 2009-09-19}
/// OK: reponse is: [7, 231, 4, 20, 24, 66, 0, 0, 1, 0, 0, 0, 0, 0, 39, 153, 0, 0, 39, 153, 0, 0, 40, 8]
/// File date: 4/20/2023 24:66
/// File format version: 1
/// Critical: b2799
/// Major...: b2799
/// Minor...: b2808


import 'package:http/http.dart' as http;


void main() async {
  
  
  
 try {
  final r = await http.get(
    Uri.parse('https://blobs.olenpeps.com/sbm/firmwares/olenergies.pepsr.fu.rules.bin')
    , headers: {
      "Cache-control": "no-cache, no-store, must-revalidate",
    }
  );
  
  print("${r.headers}");
  
  if (r.statusCode!=200) {
    
    print("Error ${r.statusCode}");
    
  }
   
  
  //final 
  //print("OK: reponse headers: ${r.headers}");   
   
  r.headers.entries.map((e)=>print("${e.key}: ${e.value}"));
  
   print("OK: reponse is: ${r.bodyBytes}");
   
   final int year = r.bodyBytes[0]<<8|r.bodyBytes[1];
   int i=2;
   final int month = r.bodyBytes[i++];
   final int day = r.bodyBytes[i++];
   final int hour = r.bodyBytes[i++];
   final int minute = r.bodyBytes[i++];
   i += 2;
   
   final int version = r.bodyBytes[i++];
   
   final int bCritical = r.bodyBytes[12]<<24|r.bodyBytes[13]<<16|r.bodyBytes[14]<<8|r.bodyBytes[15];
   final int bMajor    = r.bodyBytes[16]<<24|r.bodyBytes[17]<<16|r.bodyBytes[18]<<8|r.bodyBytes[19];
   final int bMinor    = r.bodyBytes[20]<<24|r.bodyBytes[21]<<16|r.bodyBytes[22]<<8|r.bodyBytes[23];
   
   print("File date: $month/$day/$year $hour:$minute");
   print("File format version: $version");
   print("Critical: b${bCritical.toRadixString(16)}");
   print("Major...: b${bMajor   .toRadixString(16)}");
   print("Minor...: b${bMinor   .toRadixString(16)}");
   //final int
   
  
 }catch(e) {
   print("Error: $e");
 }
  

  
  /*
  final uint8List = Uint8List.fromList(c);
  final bdata = ByteData.view(uint8List.buffer);
  print('bdata: $bdata');
  
  
  print("afu [0]=c[54]: ${c[54].toRadixString(16)}");
  print("afu [1]=c[55]: ${c[55].toRadixString(16)}");
  
  
         // == Fetch 16-bit date segment
  int i=53;
  int raw = 0;
  if (bdata.lengthInBytes < 54) return;
  raw = (bdata.getUint8(i++) << 8);
  if (bdata.lengthInBytes < 55) return;
  raw |= bdata.getUint8(i++);

  print("raw: ${raw.toRadixString(16)}");
  */
}