ngfchl
71 lines
2.4 KiB
Dart
71 lines
2.4 KiB
Dart
import 'dart:convert';
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class FastTransferEntry {
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final String path;
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final int size;
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final String? md5;
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final String? gcid;
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const FastTransferEntry({
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required this.path,
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required this.size,
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this.md5,
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this.gcid,
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});
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String get name => path.split('/').last;
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String get directoryPath =>
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path.contains('/') ? path.substring(0, path.lastIndexOf('/')) : '';
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Map<String, dynamic> toJson() => {
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'path': path,
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'size': size,
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if (md5 != null) 'etag': md5,
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if (gcid != null) 'gcid': gcid,
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};
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factory FastTransferEntry.fromJson(Map<String, dynamic> value) =>
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FastTransferEntry(
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path: value['path']?.toString() ?? '',
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size: value['size'] is int
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? value['size'] as int
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: int.tryParse('${value['size']}') ?? 0,
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md5: value['etag']?.toString(),
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gcid: value['gcid']?.toString(),
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);
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}
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List<FastTransferEntry> parseFastTransferJSON(String text) {
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final root = jsonDecode(text);
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final raw = root is Map ? root['files'] : root;
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if (raw is! List) throw const FormatException('顶层需要包含 files 数组');
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final entries = <FastTransferEntry>[];
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for (var index = 0; index < raw.length; index++) {
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if (raw[index] is! Map) throw FormatException('第 ${index + 1} 项格式无效');
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final value = Map<String, dynamic>.from(raw[index] as Map);
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final path = (value['path'] ?? value['filePath'] ?? value['name'] ?? '')
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.toString()
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.replaceAll('\\', '/')
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.replaceFirst(RegExp(r'^/+'), '');
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final size = value['size'] is int
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? value['size'] as int
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: int.tryParse('${value['size'] ?? value['fileSize'] ?? ''}');
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final md5 = (value['etag'] ?? value['eTag'] ?? value['md5'])
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?.toString()
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.toLowerCase();
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final gcid = (value['gcid'] ?? value['gcId'])?.toString().toUpperCase();
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if (path.isEmpty ||
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path.split('/').contains('..') ||
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size == null ||
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size < 0 ||
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((md5 == null || !RegExp(r'^[a-f0-9]{32}$').hasMatch(md5)) &&
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(gcid == null || !RegExp(r'^[A-F0-9]{40}$').hasMatch(gcid)))) {
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throw FormatException('第 ${index + 1} 项缺少有效 path、size 或 MD5/GCID');
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}
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entries.add(
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FastTransferEntry(path: path, size: size, md5: md5, gcid: gcid),
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);
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}
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if (entries.isEmpty) throw const FormatException('files 不能为空');
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return entries;
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}
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