betto_mediatype_detector 0.1.0-dev.1 
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Published 4 days ago • 
bettongia.com
bettongia.comA Dart package for identifying media types (MIME types) from file content and filenames.
// Copyright 2026 The Authors. See the AUTHORS file for details.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import 'dart:convert';
import 'dart:io' show exit;
import 'dart:typed_data';
import 'package:betto_mediatype_detector/betto_mediatype_detector.dart';
/// A simple application that identifies the media type of a file-like string
/// based on its name using the FreeDesktop shared-mime-info registry.
int main() {
final input = '''<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Page Title</title>
<!-- Other meta tags, CSS links, and scripts can go here -->
</head>
<body>
<!-- Visible content of the webpage goes here -->
</body>
</html>''';
final Uint8List bytes = utf8.encode(input);
final matches = freedesktopMimeInfoRegistry.detect(
bytes: bytes,
fileName: 'test.html',
);
if (matches.isEmpty) {
print('No media type match found.');
exit(0);
} else {
print('Best match is: ${matches.bestMatch}\n');
print('These are the merged results:');
// The results are ordered by descending weight.
for (final m in matches.merged) {
print('- ${m.mediaType} [priority: ${m.priority}]');
}
print(
'\nThese are the candidate media types in descending order of priority:',
);
for (final m in matches.candidates) {
print('- $m');
}
print(
'\nThese are the candidate media types (full info) in descending order of priority:',
);
for (final m in matches.combined) {
print('- ${m.mediaType} [priority: ${m.priority}]');
}
print('\nThese are the results from each check type:');
print('- Globs:');
for (final m in matches.globMatches) {
print(' - ${m.mediaType} [priority: ${m.priority}]');
}
print('- Magic:');
for (final m in matches.magicMatches) {
print(' - ${m.mediaType} [priority: ${m.priority}]');
}
print('- Root XML:');
for (final m in matches.rootXmlMatches) {
print(' - ${m.mediaType} [priority: ${m.priority}]');
}
exit(0);
}
}Metadata
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Metadata
A Dart package for identifying media types (MIME types) from file content and filenames.
Repository (GitHub)
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License
Apache-2.0 (license)
Dependencies
betto_common, collection, glob, meta, path, xml
