Range header parser for Dart.
In your pubspec.yaml:
dependencies:
range_header: ^2.0.0handleRequest(HttpRequest request) async {
// Parse the header
var header = new RangeHeader.parse(request.headers.value(HttpHeaders.rangeHeader));
// Optimize/canonicalize it
var items = RangeHeader.foldItems(header.items);
header = new RangeHeader(items);
// Get info
header.items;
header.rangeUnit;
print(header.items[0].toContentRange(fileSize));
// Serve the file
var transformer = new RangeHeaderTransformer(header);
await file.openRead().transform(transformer).pipe(request.response);
}