Video player on flutter web with local dart server - flutter

Question

I have a local dart server, serving music and videos.
I tested it with android device and a flutter application and it worked with just_audio and video_player packages after adding this line in AndriodManifest.xml:
android:usesCleartextTraffic="true"
but when I am trying to run the same app on web I get an error saying:
(4) Failed to load URL
and when i tried to run another online video and audio it worked on the flutter web app
here is some snippets of my dart server code:
request.response.headers.add('Access-Control-Allow-Origin', '*');
request.response.headers.add('Access-Control-Allow-Methods', '*');
request.response.headers.add('Access-Control-Allow-Headers', '*');
and
File file = File(audioPath);
int length = await file.length();
String range = req.headers.value('range') ?? 'bytes=0-';
List<String> parts = range.split('=');
List<String> positions = parts[1].split('-');
int start = int.parse(positions[0]);
int end = positions.length < 2 || int.tryParse(positions[1]) == null
? length
: int.parse(positions[1]);
String? mime = lookupMimeType(audioPath);
response.statusCode = HttpStatus.partialContent;
response.headers
..contentType = ContentType.parse(mime ?? 'audio/mpeg')
..contentLength = end - start
..add('Accept-Ranges', 'bytes')
..add('Content-Range', 'bytes $start-$end/$length');
file.openRead(start, end).pipe(req.response);
so I think the solution to this issue is to do similar thing like this but in web:
android:usesCleartextTraffic="true"
and one more thing
when I checked for request.headers on the dart server, I didn't find the headers that I sent with the request from the frontend:
user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36
connection: keep-alive
accept: */*
accept-language: en-US,en;q=0.9
range: bytes=0-
accept-encoding: identity;q=1, *;q=0
host: 192.168.1.39:49359
referer: http://localhost:62278/