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.
76 lines
2.5 KiB
Dart
76 lines
2.5 KiB
Dart
const kBrowserUserAgent =
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'Mozilla/5.0 (Linux; Android 14; Pixel 8 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Mobile Safari/537.36';
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const kDesktopUserAgent =
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'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36';
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Map<String, String> browserHeaders({
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String? origin,
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String? referer,
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String? accept,
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String? contentType,
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bool desktop = false,
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Map<String, String>? extra,
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}) {
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return {
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'User-Agent': desktop ? kDesktopUserAgent : kBrowserUserAgent,
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'Accept': accept ?? '*/*',
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'Accept-Language': 'en-US,en;q=0.9',
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if (origin != null) 'Origin': origin,
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if (referer != null) 'Referer': referer,
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if (contentType != null) 'Content-Type': contentType,
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...?extra,
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};
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}
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/// True when a provider dumped an error page / WAF / paywall instead of model text.
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bool looksLikeGarbage(String text) {
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final t = text.trimLeft();
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if (t.isEmpty) return true;
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final lower = t.toLowerCase();
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if (t.startsWith('<!DOCTYPE') || t.startsWith('<html') || t.startsWith('<HTML')) {
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return true;
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}
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if (lower.contains('just a moment') ||
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lower.contains('cf-browser-verification') ||
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lower.contains('attention required') ||
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lower.contains('payment required') ||
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lower.contains('frontend_captcha') ||
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lower.contains('err_challenge') ||
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lower.contains('error code:') ||
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lower.contains('missing api key') ||
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lower.contains('invalid api key') ||
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lower.contains('you have to be logged in') ||
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lower.contains('no cake credits') ||
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lower.contains('insufficient_credits')) {
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return true;
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}
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return false;
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}
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bool looksLikeModelOutput(String text) {
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final trimmed = text.trim();
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if (trimmed.length < 8) return false;
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final lower = trimmed.toLowerCase();
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if (lower == ': ping' || lower == 'ping' || lower == 'pong' || lower == '{}') {
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return false;
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}
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if (RegExp(r'^[\{\}\[\]":\s]+$').hasMatch(trimmed)) return false;
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return !looksLikeGarbage(trimmed);
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}
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String? cookieHeaderFromSetCookie(String? setCookie, {String? name}) {
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if (setCookie == null || setCookie.isEmpty) return null;
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// http package may join multiple Set-Cookie values with ", ".
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final parts = setCookie.split(RegExp(r',(?=\s*[^;=]+=)'));
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final pairs = <String>[];
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for (final part in parts) {
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final nv = part.split(';').first.trim();
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if (nv.isEmpty || !nv.contains('=')) continue;
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if (name != null && !nv.startsWith('$name=')) continue;
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pairs.add(nv);
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}
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if (pairs.isEmpty) return null;
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return pairs.join('; ');
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}
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