Alma Alexyz
fbf04d90db
Port the Oracle off the Python g4f container onto on-device providers: Chromium HTTP via Cronet, a shared cookie session, IterList retry, hosted OpenAI-compat aggregators, and same-origin WebView fallbacks instead of CORS fetch.
99 lines
2.9 KiB
Dart
99 lines
2.9 KiB
Dart
import 'dart:convert';
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import 'dart:math';
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import 'package:crypto/crypto.dart';
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import 'package:http/http.dart' as http;
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import '../http_client.dart';
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import '../models.dart';
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import '../sse.dart';
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import 'base_provider.dart';
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class ChatGptOss extends BaseProvider {
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@override
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String get name => 'ChatGptOss';
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@override
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bool get working => true;
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@override
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List<String> get models => ['gpt-oss-120b', 'gpt-5-nano'];
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@override
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String get defaultModel => 'gpt-oss-120b';
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String _generateFingerprint() {
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final seed = '${DateTime.now().millisecondsSinceEpoch / 1000.0}-${Random().nextDouble()}';
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return md5.convert(utf8.encode(seed)).toString();
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}
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@override
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Stream<String> createAsyncGenerator(
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String model,
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List<Message> messages, {
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bool stream = false,
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}) async* {
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final prompt = formatPrompt(messages);
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final url = Uri.parse('https://chat-gpt-oss.com/api/message');
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final payload = {
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"conversation_id": null,
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"model": model,
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"content": prompt,
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"reasoning_effort": "low",
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};
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final req = http.Request('POST', url);
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req.headers.addAll({
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"accept": "text/event-stream",
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"accept-language": "en-US,en;q=0.9",
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"cache-control": "no-cache",
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"content-type": "application/json",
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"origin": "https://chat-gpt-oss.com",
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"pragma": "no-cache",
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"referer": "https://chat-gpt-oss.com/",
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"sec-ch-ua": '"Chromium";v="148", "Google Chrome";v="148", "Not/A)Brand";v="99"',
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"sec-ch-ua-mobile": "?0",
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"sec-ch-ua-platform": '"Linux"',
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"sec-fetch-dest": "empty",
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"sec-fetch-mode": "cors",
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"sec-fetch-site": "same-origin",
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"user-agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36",
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"x-fingerprint": _generateFingerprint(),
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});
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req.body = jsonEncode(payload);
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final response = await g4fHttp.send(req);
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if (response.statusCode == 200) {
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String? currentEvent;
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await for (final line in splitSseLines(response.stream.transform(utf8.decoder))) {
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final trimmed = line.trim();
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if (trimmed.isEmpty) {
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currentEvent = null;
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continue;
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}
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if (trimmed.startsWith('event:')) {
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currentEvent = trimmed.substring(6).trim();
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if (currentEvent == 'summary') {
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return;
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}
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continue;
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}
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if (trimmed.startsWith('data:') && currentEvent == 'message') {
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final dataStr = trimmed.substring(5).trim();
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if (dataStr.isEmpty) continue;
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try {
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final jsonChunk = jsonDecode(dataStr);
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final content = jsonChunk['content'] as String?;
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if (content != null && content.isNotEmpty) {
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yield content;
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}
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} catch (_) {}
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}
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}
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} else {
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throw Exception('$name returned status ${response.statusCode}');
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}
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}
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}
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