720 lines
25 KiB
C#
720 lines
25 KiB
C#
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
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// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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// Copyright (C) LibreHardwareMonitor and Contributors.
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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using System.IO.Compression;
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using System.Linq;
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using System.Net;
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using System.Reflection;
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using System.Security.Cryptography;
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using System.Text;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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using System.Threading;
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using System.Threading.Tasks;
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using LibreHardwareMonitor.Hardware;
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using LibreHardwareMonitor.Windows.WinUI.Utilities;
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using LibreHardwareMonitor.Windows.WinUI.ViewModels;
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namespace LibreHardwareMonitor.Windows.WinUI.Services;
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public sealed class RemoteWebServer : IDisposable
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{
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private readonly IComputer _computer;
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private readonly Func<SensorTreeItemViewModel?> _rootProvider;
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private readonly Version _version = typeof(RemoteWebServer).Assembly.GetName().Version ?? new Version(0, 0);
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private CancellationTokenSource? _cts;
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private HttpListener? _listener;
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private Task? _listenerTask;
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public RemoteWebServer(
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Func<SensorTreeItemViewModel?> rootProvider,
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IComputer computer,
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string listenerIp,
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int listenerPort,
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bool authEnabled,
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string userName,
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string passwordSha256)
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{
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_rootProvider = rootProvider;
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_computer = computer;
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ListenerIp = listenerIp;
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ListenerPort = listenerPort;
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AuthEnabled = authEnabled;
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UserName = userName;
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PasswordSHA256 = passwordSha256;
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try
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{
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_listener = new HttpListener { IgnoreWriteExceptions = true };
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}
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catch (PlatformNotSupportedException)
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{
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_listener = null;
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}
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}
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public bool AuthEnabled { get; set; }
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public bool IsRunning => _listener?.IsListening == true;
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public string ListenerIp { get; set; }
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public int ListenerPort { get; set; }
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public string PasswordSHA256 { get; private set; }
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public bool PlatformNotSupported => _listener == null;
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public string UserName { get; set; }
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public void Dispose()
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{
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Quit();
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}
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public void SetPassword(string plainPassword)
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{
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PasswordSHA256 = ComputeSHA256(plainPassword);
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}
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public bool Start()
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{
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if (PlatformNotSupported || _listener == null)
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return false;
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try
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{
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if (_listener.IsListening)
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return true;
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string listenerIp = ResolveListenerIp();
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string prefix = $"http://{listenerIp}:{ListenerPort}/";
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_listener.Prefixes.Clear();
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_listener.Prefixes.Add(prefix);
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_listener.Realm = "Libre Hardware Monitor";
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_listener.AuthenticationSchemes = AuthEnabled ? AuthenticationSchemes.Basic : AuthenticationSchemes.Anonymous;
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_listener.Start();
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_cts = new CancellationTokenSource();
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_listenerTask = Task.Run(() => ProcessRequestsAsync(_cts.Token));
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return true;
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}
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catch
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{
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return false;
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}
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}
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public bool Stop()
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{
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if (PlatformNotSupported || _listener == null)
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return false;
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try
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{
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_cts?.Cancel();
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_listenerTask?.Wait(TimeSpan.FromSeconds(5));
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_listener.Stop();
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_cts?.Dispose();
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_cts = null;
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_listenerTask = null;
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return true;
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}
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catch
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{
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return false;
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}
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}
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public void Quit()
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{
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if (PlatformNotSupported)
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return;
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Stop();
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try
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{
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_listener?.Abort();
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}
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catch
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{
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}
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}
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private async Task ProcessRequestsAsync(CancellationToken cancellationToken)
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{
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if (_listener == null)
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return;
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while (_listener.IsListening && !cancellationToken.IsCancellationRequested)
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{
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try
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{
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HttpListenerContext context = await _listener.GetContextAsync();
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_ = Task.Run(() => HandleContextAsync(context), cancellationToken);
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}
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catch (ObjectDisposedException)
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{
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break;
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}
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catch (OperationCanceledException)
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{
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break;
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}
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catch (HttpListenerException)
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{
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if (!_listener.IsListening)
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break;
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}
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catch
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{
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}
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}
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}
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private async Task HandleContextAsync(HttpListenerContext context)
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{
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try
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{
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if (!IsAuthenticated(context))
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{
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context.Response.StatusCode = 401;
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await SendResponseAsync(context.Response, "<HTML><BODY><H4>401 Unauthorized</H4>Authorization required.</BODY></HTML>", "text/html");
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return;
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}
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HttpListenerRequest request = context.Request;
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if (request.HttpMethod == "POST")
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{
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await HandlePostRequestAsync(context.Response, request);
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return;
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}
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string requestedFile = request.RawUrl?.TrimStart('/') ?? "";
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if (requestedFile.Length == 0)
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requestedFile = "index.html";
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if (requestedFile.Equals("data.json", StringComparison.OrdinalIgnoreCase))
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{
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await SendJsonAsync(context.Response, request);
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return;
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}
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if (requestedFile.StartsWith("metrics", StringComparison.OrdinalIgnoreCase))
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{
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await SendPrometheusAsync(context.Response, request);
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return;
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}
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if (requestedFile.StartsWith("Sensor", StringComparison.OrdinalIgnoreCase))
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{
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Dictionary<string, object?> result = [];
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HandleSensorRequest(request, result);
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await SendJsonSensorAsync(context.Response, result);
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return;
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}
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if (requestedFile.StartsWith("ResetAllMinMax", StringComparison.OrdinalIgnoreCase))
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{
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_computer.Accept(new SensorVisitor(sensor =>
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{
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sensor.ResetMin();
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sensor.ResetMax();
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}));
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await SendJsonAsync(context.Response, request);
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return;
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}
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if (requestedFile.StartsWith("images_icon/", StringComparison.OrdinalIgnoreCase))
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{
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await ServeResourceFileAsync(context.Response, requestedFile["images_icon/".Length..]);
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return;
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}
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await ServeResourceFileAsync(context.Response, PathForWebResource(requestedFile));
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}
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catch
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{
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try
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{
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context.Response.StatusCode = 500;
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context.Response.Close();
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}
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catch
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{
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}
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}
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}
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private bool IsAuthenticated(HttpListenerContext context)
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{
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if (!AuthEnabled)
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return true;
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try
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{
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if (context.User?.Identity is HttpListenerBasicIdentity identity)
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return identity.Name == UserName && ComputeSHA256(identity.Password) == PasswordSHA256;
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}
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catch
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{
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}
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return false;
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}
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private async Task HandlePostRequestAsync(HttpListenerResponse response, HttpListenerRequest request)
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{
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Dictionary<string, object?> result = new() { ["result"] = "ok" };
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try
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{
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if (request.Url?.Segments.Length == 2 && request.Url.Segments[1].TrimEnd('/').Equals("Sensor", StringComparison.OrdinalIgnoreCase))
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HandleSensorRequest(request, result);
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else
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throw new ArgumentException("Empty URL, possible values: ['Sensor']");
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}
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catch (Exception ex)
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{
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result["result"] = "fail";
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result["message"] = ex.ToString();
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}
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await SendJsonSensorAsync(response, result);
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}
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private void HandleSensorRequest(HttpListenerRequest request, Dictionary<string, object?> result)
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{
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IDictionary<string, string> query = ParseQuery(request.Url?.Query);
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if (!query.TryGetValue("action", out string? action))
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throw new ArgumentNullException(nameof(action), "No action provided");
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if (!query.TryGetValue("id", out string? id))
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throw new ArgumentNullException(nameof(id), "No id provided");
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SensorTreeItemViewModel sensorNode = FindSensor(id)
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?? throw new ArgumentException("Unknown id " + id + " specified");
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ISensor sensor = sensorNode.Sensor!;
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if (action == "ResetMinMax")
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{
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sensor.ResetMin();
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sensor.ResetMax();
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action = "Get";
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}
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switch (action)
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{
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case "Set" when query.TryGetValue("value", out string? value):
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SetSensorControlValue(sensor, value);
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result["result"] = "ok";
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break;
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case "Set":
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throw new ArgumentNullException("value", "No value provided");
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case "Get":
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result["result"] = "ok";
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result["value"] = sensor.Value;
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result["min"] = sensor.Min;
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result["max"] = sensor.Max;
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result["format"] = SensorFormatter.GetFormatString(sensor);
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break;
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default:
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throw new ArgumentException("Unknown action type " + action);
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}
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}
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private SensorTreeItemViewModel? FindSensor(string id)
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{
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return _rootProvider()?.EnumerateSensors()
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.FirstOrDefault(sensorItem => sensorItem.Sensor?.Identifier.ToString() == id);
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}
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private static void SetSensorControlValue(ISensor sensor, string value)
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{
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if (sensor.Control == null)
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throw new ArgumentException("Specified sensor '" + sensor.Identifier + "' can not be set");
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if (value == "null")
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sensor.Control.SetDefault();
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else
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sensor.Control.SetSoftware(float.Parse(value, CultureInfo.InvariantCulture));
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}
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private async Task SendJsonAsync(HttpListenerResponse response, HttpListenerRequest request)
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{
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Dictionary<string, object?> json = new()
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{
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["id"] = 0,
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["Version"] = $"{_version.Major}.{_version.Minor}.{_version.Build}",
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["Text"] = "Sensor",
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["Min"] = "Min",
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["Value"] = "Value",
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["Max"] = "Max",
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["ImageURL"] = ""
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};
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int nodeIndex = 1;
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SensorTreeItemViewModel? root = _rootProvider();
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json["Children"] = root == null ? Array.Empty<object>() : new List<object> { GenerateJsonForNode(root, ref nodeIndex) };
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JsonSerializerOptions options = new()
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{
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NumberHandling = JsonNumberHandling.AllowNamedFloatingPointLiterals
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};
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byte[] buffer = Encoding.UTF8.GetBytes(JsonSerializer.Serialize(json, options));
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bool acceptGzip = request.Headers["Accept-Encoding"]?.IndexOf("gzip", StringComparison.OrdinalIgnoreCase) >= 0;
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response.AddHeader("Cache-Control", "no-cache");
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response.AddHeader("Access-Control-Allow-Origin", "*");
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response.ContentType = "application/json";
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if (acceptGzip)
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{
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response.AddHeader("Content-Encoding", "gzip");
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using MemoryStream memory = new();
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using (GZipStream zip = new(memory, CompressionMode.Compress, true))
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await zip.WriteAsync(buffer);
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buffer = memory.ToArray();
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}
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response.ContentLength64 = buffer.Length;
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await response.OutputStream.WriteAsync(buffer);
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response.Close();
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}
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private Dictionary<string, object?> GenerateJsonForNode(SensorTreeItemViewModel node, ref int nodeIndex)
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{
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Dictionary<string, object?> jsonNode = new()
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{
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["id"] = nodeIndex++,
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["Text"] = node.Text,
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["Min"] = "",
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["Value"] = "",
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["Max"] = "",
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["ImageURL"] = GetImageUrl(node)
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};
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if (node.Sensor != null)
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{
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jsonNode["SensorId"] = node.Sensor.Identifier.ToString();
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jsonNode["Type"] = node.Sensor.SensorType.ToString();
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jsonNode["Min"] = node.Min;
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jsonNode["Value"] = node.Value;
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jsonNode["Max"] = node.Max;
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jsonNode["RawMin"] = node.Sensor.Min;
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jsonNode["RawValue"] = node.Sensor.Value;
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jsonNode["RawMax"] = node.Sensor.Max;
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jsonNode["ImageURL"] = "images/transparent.png";
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}
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else if (node.Hardware != null)
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{
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jsonNode["HardwareId"] = node.Hardware.Identifier.ToString();
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}
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List<object> children = [];
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foreach (SensorTreeItemViewModel child in node.Children)
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children.Add(GenerateJsonForNode(child, ref nodeIndex));
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jsonNode["Children"] = children;
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return jsonNode;
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}
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private async Task SendPrometheusAsync(HttpListenerResponse response, HttpListenerRequest request)
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{
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Dictionary<string, int> settings = ParsePrometheusSettings(request);
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string content = GeneratePrometheusResponse(_rootProvider(), settings);
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response.AddHeader("Cache-Control", "no-cache");
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response.AddHeader("Access-Control-Allow-Origin", "*");
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response.AddHeader("X-archivelength", settings["archivelength"].ToString(CultureInfo.InvariantCulture));
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response.AddHeader("X-timestamps", settings["timestamps"].ToString(CultureInfo.InvariantCulture));
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response.AddHeader("X-lastvalue", settings["lastvalue"].ToString(CultureInfo.InvariantCulture));
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await SendResponseAsync(response, content, "text/plain");
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}
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private static Dictionary<string, int> ParsePrometheusSettings(HttpListenerRequest request)
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{
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Dictionary<string, string> query = new(ParseQuery(request.Url?.Query), StringComparer.OrdinalIgnoreCase);
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int archive = ClampQueryValue(query, "archivelength", 0, 0, 10);
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int timestamps = ClampQueryValue(query, "timestamps", 0, 0, 1);
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int lastValue = ClampQueryValue(query, "lastvalue", 1, 0, 1);
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if (archive == 0 && lastValue == 0)
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{
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archive = 1;
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timestamps = 1;
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}
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if (archive > 0)
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timestamps = 1;
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return new Dictionary<string, int>
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{
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["archivelength"] = archive,
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["timestamps"] = timestamps,
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["lastvalue"] = lastValue
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};
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}
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private static int ClampQueryValue(IDictionary<string, string> query, string key, int fallback, int min, int max)
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{
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if (!query.TryGetValue(key, out string? rawValue) || !int.TryParse(rawValue, NumberStyles.Integer, CultureInfo.InvariantCulture, out int value))
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return fallback;
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return Math.Clamp(value, min, max);
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}
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private static string GeneratePrometheusResponse(SensorTreeItemViewModel? root, Dictionary<string, int> settings)
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{
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if (root == null)
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return "";
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StringBuilder builder = new();
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string host = root.Text;
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string lastTagName = "";
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foreach (SensorTreeItemViewModel hardware in root.Enumerate().Where(item => item.Hardware != null))
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{
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string hardwareType = hardware.Hardware!.HardwareType.ToString();
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string hardwareName = hardware.Hardware.Name;
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string hardwareId = hardware.Hardware.Identifier.ToString();
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string hardwareAlias = $"{hardwareName} ({hardwareId})";
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foreach (SensorTreeItemViewModel sensorItem in hardware.EnumerateSensors())
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{
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ISensor sensor = sensorItem.Sensor!;
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(string suffix, double factor) = GetPrometheusUnit(sensor.SensorType);
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string tagName = $"lhm_{hardwareType}_{sensor.SensorType}{suffix}".ToLowerInvariant();
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string sensorName = sensor.Name.Replace("#", "");
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string sensorId = sensor.Identifier.ToString().StartsWith(hardwareId, StringComparison.Ordinal)
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? sensor.Identifier.ToString()[hardwareId.Length..]
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: sensor.Identifier.ToString();
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string sensorAlias = $"{sensorName} ({sensorId})";
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string tagLine = $$"""{{tagName}} {"sensorName"="{{sensorName}}", "sensorAlias"="{{sensorAlias}}", "hardwareName"="{{hardwareName}}", "hardwareAlias"="{{hardwareAlias}}", "sensorId"="{{sensorId}}", "hardwareId"="{{hardwareId}}", "host"="{{host}}"}""";
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if (lastTagName != tagName)
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{
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builder.Append("# TYPE ").Append(tagName).AppendLine(" gauge");
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lastTagName = tagName;
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}
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int counter = 0;
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foreach (SensorValue value in sensor.Values.Reverse())
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{
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if (counter++ > settings["archivelength"])
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break;
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if (float.IsNaN(value.Value))
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{
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builder.Append("# HELP ").Append(tagLine).AppendLine(" has an invalid value and was skipped.");
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continue;
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}
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if (counter == 1 && settings["lastvalue"] == 0)
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continue;
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builder.Append(tagLine).Append(' ').Append((value.Value * factor).ToString(CultureInfo.InvariantCulture));
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if (settings["timestamps"] == 1)
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builder.Append(' ').Append(((DateTimeOffset)value.Time).ToUnixTimeMilliseconds());
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builder.AppendLine();
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}
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}
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}
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return builder.ToString();
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}
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private static (string Suffix, double Factor) GetPrometheusUnit(SensorType sensorType)
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{
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return sensorType switch
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{
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SensorType.Clock => ("_hertz", 1000000),
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SensorType.Conductivity => ("_seconds_per_centimeter", 0.000001),
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SensorType.Control => ("_percent", 1),
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SensorType.Current => ("_amperes", 1),
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SensorType.Data => ("_bytes", 1000000000),
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SensorType.Energy => ("_watthour", 0.001),
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SensorType.Fan => ("_rpm", 1),
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SensorType.Flow => ("_liters_per_hour", 1),
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SensorType.Frequency => ("_hertz", 1),
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SensorType.Humidity => ("_percent", 1),
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SensorType.Level => ("_percent", 1),
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SensorType.Load => ("_percent", 1),
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SensorType.Noise => ("_decibels", 1),
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SensorType.Power => ("_watts", 1),
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SensorType.SmallData => ("_bytes", 1024 * 1024),
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SensorType.Temperature => ("_celsius", 1),
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SensorType.Throughput => ("_bytes_per_second", 1),
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SensorType.TimeSpan => ("_seconds", 1),
|
|
SensorType.Timing => ("_seconds", 0.000000001),
|
|
SensorType.Voltage => ("_volts", 1),
|
|
_ => ("", 1)
|
|
};
|
|
}
|
|
|
|
private async Task SendJsonSensorAsync(HttpListenerResponse response, Dictionary<string, object?> sensorData)
|
|
{
|
|
response.AddHeader("Cache-Control", "no-cache");
|
|
response.AddHeader("Access-Control-Allow-Origin", "*");
|
|
await SendResponseAsync(response, JsonSerializer.Serialize(sensorData), "application/json");
|
|
}
|
|
|
|
private static async Task SendResponseAsync(HttpListenerResponse response, string content, string contentType)
|
|
{
|
|
byte[] buffer = Encoding.UTF8.GetBytes(content);
|
|
response.ContentType = contentType;
|
|
response.ContentLength64 = buffer.Length;
|
|
await response.OutputStream.WriteAsync(buffer);
|
|
response.Close();
|
|
}
|
|
|
|
private async Task ServeResourceFileAsync(HttpListenerResponse response, string relativePath)
|
|
{
|
|
string normalizedPath = relativePath.Replace('/', '.').Replace('\\', '.').Replace("custom-theme", "custom_theme");
|
|
Assembly assembly = Assembly.GetExecutingAssembly();
|
|
string? resourceName = assembly.GetManifestResourceNames()
|
|
.FirstOrDefault(name => name.EndsWith(".Resources." + normalizedPath, StringComparison.OrdinalIgnoreCase)
|
|
|| name.EndsWith(".Resources.Web." + normalizedPath, StringComparison.OrdinalIgnoreCase));
|
|
|
|
if (resourceName == null)
|
|
{
|
|
response.StatusCode = 404;
|
|
response.Close();
|
|
return;
|
|
}
|
|
|
|
await using Stream? stream = assembly.GetManifestResourceStream(resourceName);
|
|
if (stream == null)
|
|
{
|
|
response.StatusCode = 404;
|
|
response.Close();
|
|
return;
|
|
}
|
|
|
|
response.ContentType = GetContentType(Path.GetExtension(relativePath));
|
|
response.ContentLength64 = stream.Length;
|
|
await stream.CopyToAsync(response.OutputStream);
|
|
response.Close();
|
|
}
|
|
|
|
private string ResolveListenerIp()
|
|
{
|
|
if (ListenerIp is "+" or "*" or "0.0.0.0")
|
|
return ListenerIp;
|
|
|
|
try
|
|
{
|
|
IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
|
|
if (host.AddressList.Any(ip => ip.ToString() == ListenerIp))
|
|
return ListenerIp;
|
|
}
|
|
catch
|
|
{
|
|
}
|
|
|
|
ListenerIp = "+";
|
|
return ListenerIp;
|
|
}
|
|
|
|
private static string PathForWebResource(string requestedFile)
|
|
{
|
|
return "Web." + requestedFile.TrimStart('/').Replace('/', '.');
|
|
}
|
|
|
|
private static string GetImageUrl(SensorTreeItemViewModel node)
|
|
{
|
|
if (node.Hardware != null)
|
|
return "images_icon/" + GetHardwareImageFile(node.Hardware.HardwareType);
|
|
if (node.Kind == SensorTreeItemKind.SensorType)
|
|
return "images_icon/" + GetTypeImageFile(node.Text);
|
|
if (node.Kind == SensorTreeItemKind.Root)
|
|
return "images_icon/computer.png";
|
|
|
|
return "images/transparent.png";
|
|
}
|
|
|
|
private static string GetHardwareImageFile(HardwareType hardwareType)
|
|
{
|
|
return hardwareType switch
|
|
{
|
|
HardwareType.Cpu => "cpu.png",
|
|
HardwareType.GpuNvidia => "nvidia.png",
|
|
HardwareType.GpuAmd => "ati.png",
|
|
HardwareType.GpuIntel => "intel.png",
|
|
HardwareType.Storage => "hdd.png",
|
|
HardwareType.Motherboard => "mainboard.png",
|
|
HardwareType.SuperIO => "chip.png",
|
|
HardwareType.Memory => "ram.png",
|
|
HardwareType.Cooler => "fan.png",
|
|
HardwareType.Network => "nic.png",
|
|
HardwareType.Psu => "power-supply.png",
|
|
HardwareType.Battery => "battery.png",
|
|
HardwareType.PowerMonitor => "powermonitor.png",
|
|
_ => "cpu.png"
|
|
};
|
|
}
|
|
|
|
private static string GetTypeImageFile(string sensorTypeText)
|
|
{
|
|
return sensorTypeText switch
|
|
{
|
|
"Voltages" or "Currents" or "Conductivity" => "voltage.png",
|
|
"Clocks" or "Timings" or "Frequencies" => "clock.png",
|
|
"Load" => "load.png",
|
|
"Temperatures" => "temperature.png",
|
|
"Fans" => "fan.png",
|
|
"Flows" or "Humidity" => "flow.png",
|
|
"Controls" => "control.png",
|
|
"Levels" => "level.png",
|
|
"Powers" => "power.png",
|
|
"Noise" => "loudspeaker.png",
|
|
"Throughput" => "throughput.png",
|
|
"Data" or "Small Data" => "data.png",
|
|
"Energy" or "Time Spans" => "time.png",
|
|
_ => "power.png"
|
|
};
|
|
}
|
|
|
|
private static string GetContentType(string extension)
|
|
{
|
|
return extension.ToLowerInvariant() switch
|
|
{
|
|
".css" => "text/css",
|
|
".gif" => "image/gif",
|
|
".htm" or ".html" => "text/html",
|
|
".ico" => "image/x-icon",
|
|
".jpg" or ".jpeg" => "image/jpeg",
|
|
".js" => "application/javascript",
|
|
".png" => "image/png",
|
|
".txt" => "text/plain",
|
|
_ => "application/octet-stream"
|
|
};
|
|
}
|
|
|
|
private static IDictionary<string, string> ParseQuery(string? query)
|
|
{
|
|
Dictionary<string, string> result = new(StringComparer.OrdinalIgnoreCase);
|
|
if (string.IsNullOrWhiteSpace(query))
|
|
return result;
|
|
|
|
foreach (string part in query.TrimStart('?').Split('&', StringSplitOptions.RemoveEmptyEntries))
|
|
{
|
|
string[] split = part.Split('=', 2);
|
|
string key = WebUtility.UrlDecode(split[0]);
|
|
string value = split.Length > 1 ? WebUtility.UrlDecode(split[1]) : "";
|
|
result[key] = value;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
public static string ComputeSHA256(string text)
|
|
{
|
|
using SHA256 hash = SHA256.Create();
|
|
return string.Concat(hash.ComputeHash(Encoding.UTF8.GetBytes(text)).Select(item => item.ToString("x2", CultureInfo.InvariantCulture)));
|
|
}
|
|
}
|