blob: 31a9631d3dbbfecc0511c7768fafa17176a8f584 [file] [log] [blame]
// 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 {
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() ??
Future<ValidationResult> validate() async {
if (_httpProxy.isEmpty) {
return const ValidationResult(
ValidationType.installed, <ValidationMessage>[]);
final List<ValidationMessage> messages = <ValidationMessage>[
const ValidationMessage('HTTP_PROXY is set'),
if (_noProxy.isEmpty)
const ValidationMessage.hint('NO_PROXY is not set')
ValidationMessage('NO_PROXY is $_noProxy'),
for (final String host in await _getLoopbackAddresses())
if (_noProxy.contains(host))
ValidationMessage('NO_PROXY contains $host')
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.installed,
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) {
return loopBackAddresses;