mengyanshou
commented
3 years ago i edit _handleFile like this
Future<Response> _handleFile(Request request, File file,
FutureOr<String> Function() getContentType) async {
final stat = file.statSync();
final ifModifiedSince = request.ifModifiedSince;
if (ifModifiedSince != null) {
final fileChangeAtSecResolution = toSecondResolution(stat.modified);
if (!fileChangeAtSecResolution.isAfter(ifModifiedSince)) {
return Response.notModified();
}
}
final headers = {
HttpHeaders.contentLengthHeader: stat.size.toString(),
HttpHeaders.lastModifiedHeader: formatHttpDate(stat.modified)
};
final contentType = await getContentType();
int length = await file.length();
var range = request.headers[HttpHeaders.rangeHeader];
if (contentType != null) headers[HttpHeaders.contentTypeHeader] = contentType;
if (range != null) {
// We only support one range, where the standard support several.
var matches = RegExp(r"^bytes=(\d*)\-(\d*)$").firstMatch(range);
// If the range header have the right format, handle it.
if (matches != null && (matches[1].isNotEmpty || matches[2].isNotEmpty)) {
// Serve sub-range.
int start; // First byte position - inclusive.
int end; // Last byte position - inclusive.
if (matches[1].isEmpty) {
start = length - int.parse(matches[2]);
if (start < 0) start = 0;
end = length - 1;
} else {
start = int.parse(matches[1]);
end = matches[2].isEmpty ? length - 1 : int.parse(matches[2]);
}
// If the range is syntactically invalid the Range header
// MUST be ignored (RFC 2616 section 14.35.1).
if (start <= end) {
if (end >= length) {
end = length - 1;
}
if (start >= length) {
return Response(HttpStatus.requestedRangeNotSatisfiable);
}
// Override Content-Length with the actual bytes sent.
headers[HttpHeaders.contentLengthHeader] = (end - start + 1).toString();
// Set 'Partial Content' status code.
headers[HttpHeaders.contentRangeHeader] = 'bytes $start-$end/$length';
// Pipe the 'range' of the file.
if (request.method == 'HEAD') {
return Response(
HttpStatus.partialContent,
body: '',
headers: headers,
);
} else {
return Response(
HttpStatus.partialContent,
body: file.openRead(start, end + 1),
headers: headers,
);
}
}
}
}
return Response.ok(file.openRead(), headers: headers);
}now it worked.
kevmoo
I've tried to use createFileHandler for video file. and i can't buffer the video in the browser，It only plays when I download it completely. but i use virtual_directory from httt_server work normally， i think maybe the reason is response doesn't containes content-range