dio_network_inspector

An in-app network inspector for Dio. See every request your app makes, filter it, read the bodies, and export it as JSON or a cURL command — without leaving the app or attaching a proxy.

Calls	Detail

Why another one

Two dependencies: dio and flutter. No native plugins, so nothing to configure in your Podfile or Gradle, no platform restrictions, and no version conflicts. No state-management dependency either — it is a plain ChangeNotifier, so it drops into a Riverpod, bloc, provider, or setState app equally well.

It also adopts your app's ColorScheme, including dark mode, instead of shipping its own look.

Features

• Captures every Dio request, response, and error via one interceptor
• Live list with pause, clear, and a bounded ring buffer (500 calls by default)
• Filter by HTTP method, status-code prefix (5 matches all 5xx), errors-only, and URL substring
• Per-call detail: header tables and pretty-printed JSON bodies
• Copy any section, or export the request as cURL — with Authorization, Cookie, and other auth headers automatically masked
• Export the whole session as JSON

Install

flutter pub add dio_network_inspector

Usage

Attach the interceptor, push the page. That's the whole integration:

import 'package:dio_network_inspector/dio_network_inspector.dart';

dio.interceptors.add(NetworkInspectorInterceptor());

Navigator.of(context).push(
  MaterialPageRoute<void>(builder: (_) => const NetworkInspectorPage()),
);

Both default to a shared controller, so they find each other with no wiring.

Bring your own controller

For explicit ownership — or to keep test state isolated — construct one and pass it to both:

final inspector = NetworkInspectorController(maxCalls: 200);

dio.interceptors.add(NetworkInspectorInterceptor(inspector));

Navigator.of(context).push(
  MaterialPageRoute<void>(
    builder: (_) => NetworkInspectorPage(controller: inspector),
  ),
);

It is a ChangeNotifier, so it slots into whatever you already use:

// Riverpod
final inspectorProvider = Provider((_) => NetworkInspectorController.instance);

// provider
ChangeNotifierProvider.value(value: NetworkInspectorController.instance);

Add the interceptor last, after anything that mutates headers or the body, so what the inspector shows is what actually went over the wire.

Theming

Colors come from your app's ColorScheme by default. Override any slot:

NetworkInspectorPage(
  theme: const InspectorTheme(
    accent: Color(0xFF7C3AED),
    monoFontFamily: 'JetBrainsMono',
  ),
)

Slot	Used for	Default
background	Page background	colorScheme.surface
surface	Cards, list tiles, bottom sheet	colorScheme.surfaceContainerLowest
onSurface	Primary text	colorScheme.onSurface
muted	Timestamps, labels, hints	colorScheme.onSurfaceVariant
divider	Dividers and input borders	colorScheme.outlineVariant
fill	Search-field background	colorScheme.surfaceContainerHighest
accent / onAccent	App bar, selected chips, buttons	colorScheme.primary / onPrimary
success / successBg	2xx status pill	Brightness-aware green
warning / warningBg	3xx pill, paused banner	Brightness-aware amber
error / errorBg	4xx-5xx pill, error text	colorScheme.error / errorContainer
monoFontFamily	Headers, bodies, URLs	'monospace'

Unset slots fall back to the ColorScheme, so a partial override is fine.

Export

Exports go to the clipboard by default. To hand them somewhere else — a share sheet, a file, your bug tracker — supply onExport:

NetworkInspectorPage(
  onExport: (content, suggestedFilename) =>
      SharePlus.instance.share(ShareParams(text: content)),
)

It receives the session JSON, a request transcript, or a cURL command depending on which action fired, plus a suggested filename.

⚠️ Never ship this in a release build

The detail page renders request and response headers verbatim, including Authorization and Cookie. Masking applies only to cURL export. That is correct for a debug tool and dangerous in production — anyone who reaches the page can read the current user's session token.

Gate both the interceptor and the page:

if (kDebugMode) {
  dio.interceptors.add(NetworkInspectorInterceptor());
}

Anything that opens the page must be behind the same check. The example app does this.

License

MIT — see LICENSE.