dio_smart_logger

A production-focused logging interceptor for Dio with structured output, sensitive data masking, cURL generation, and detailed error diagnostics.

Features

• Structured request, response, and error logs
• Configurable log levels: none, error, info, debug, verbose
• Sensitive data masking for headers, query params, and bodies
• cURL generation for request reproduction
• Performance metrics: duration, payload size, transfer rate
• Error root-cause details by DioExceptionType
• Optional request filtering and custom printer callback

Installation

Add the dependency:

dependencies:
  dio_smart_logger: ^0.1.1

Then run:

dart pub get

Quick Start

import 'package:dio/dio.dart';
import 'package:dio_smart_logger/dio_smart_logger.dart';

final dio = Dio();

dio.interceptors.add(
  DioLoggerInterceptor(
    config: const DioLoggerConfig(
      enabled: true,
      level: DioLogLevel.debug,
      showCurl: true,
      maskSensitiveData: true,
    ),
  ),
);

Common Configuration

const loggerConfig = DioLoggerConfig(
  enabled: true,
  level: DioLogLevel.verbose,
  showCurl: true,
  showPerformanceMetrics: true,
  logErrorStackTrace: true,
  maxBodyBytes: 64 * 1024,
  requestFilter: _logOnlyApiHost,
);

bool _logOnlyApiHost(RequestOptions options) {
  return options.uri.host == 'api.example.com';
}

Custom Printer

Use printer to route logs anywhere:

final logs = <String>[];

final interceptor = DioLoggerInterceptor(
  config: DioLoggerConfig(
    printer: logs.add,
    useColors: false,
  ),
);

Security Notes

• By default, sensitive keys are masked.
• You can extend sensitiveKeys for project-specific secrets.
• You can suppress specific headers with headerBlacklist.

Public API

• DioLoggerInterceptor
• DioLoggerConfig
• DioLogLevel

Example

See example/main.dart for a runnable setup with a mock adapter.

Run it with:

dart run example/main.dart

Release Flow

This repository is designed for:

1. First release published manually from local machine.
2. Later releases published automatically from tag pushes using GitHub OIDC Trusted Publisher.

The automated workflow expects tags in the format:

dio_smart_logger-v<version>

License

MIT - see LICENSE.