// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'base/io.dart'; import 'base/platform.dart'; import 'doctor_validator.dart'; /// A validator that displays configured HTTP_PROXY environment variables. /// /// if the `HTTP_PROXY` environment variable is non-empty, the contents are /// validated along with `NO_PROXY`. class ProxyValidator extends DoctorValidator { ProxyValidator({ required Platform platform, }) : shouldShow = _getEnv('HTTP_PROXY', platform).isNotEmpty, _httpProxy = _getEnv('HTTP_PROXY', platform), _noProxy = _getEnv('NO_PROXY', platform), super('Proxy Configuration'); final bool shouldShow; final String _httpProxy; final String _noProxy; /// Gets a trimmed, non-null environment variable. If the variable is not set /// an empty string will be returned. Checks for the lowercase version of the /// environment variable first, then uppercase to match Dart's HTTP implementation. static String _getEnv(String key, Platform platform) => platform.environment[key.toLowerCase()]?.trim() ?? platform.environment[key.toUpperCase()]?.trim() ?? ''; @override Future<ValidationResult> validate() async { if (_httpProxy.isEmpty) { return const ValidationResult( ValidationType.success, <ValidationMessage>[]); } final List<ValidationMessage> messages = <ValidationMessage>[ const ValidationMessage('HTTP_PROXY is set'), if (_noProxy.isEmpty) const ValidationMessage.hint('NO_PROXY is not set') else ...<ValidationMessage>[ ValidationMessage('NO_PROXY is $_noProxy'), for (final String host in await _getLoopbackAddresses()) if (_noProxy.contains(host)) ValidationMessage('NO_PROXY contains $host') else ValidationMessage.hint('NO_PROXY does not contain $host'), ], ]; final bool hasIssues = messages.any( (ValidationMessage msg) => msg.isHint || msg.isError); return ValidationResult( hasIssues ? ValidationType.partial : ValidationType.success, messages, ); } Future<List<String>> _getLoopbackAddresses() async { final List<String> loopBackAddresses = <String>['localhost']; final List<NetworkInterface> networkInterfaces = await listNetworkInterfaces(includeLinkLocal: true, includeLoopback: true); for (final NetworkInterface networkInterface in networkInterfaces) { for (final InternetAddress internetAddress in networkInterface.addresses) { if (internetAddress.isLoopback) { loopBackAddresses.add(internetAddress.address); } } } return loopBackAddresses; } }