修复动态获取失败的问题

src/Lib/Lib.Implementation/HttpProvider/HttpProvider.Extension.cs

@@ -1,15 +1,18 @@
 // Copyright (c) Richasy. All rights reserved.
 
 using System;
+using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
+using System.Net.NetworkInformation;
 using System.Threading;
 using System.Threading.Tasks;
 using Bili.Lib.Interfaces;
 using Bili.Models.App.Constants;
 using Bili.Models.App.Other;
 using Bili.Models.BiliBili;
+using Bili.Models.gRPC;
 using Newtonsoft.Json;
 
 namespace Bili.Lib
@@ -19,8 +22,8 @@ namespace Bili.Lib
     /// </summary>
     public partial class HttpProvider
     {
+        private static string _buvid;
         private readonly IAuthorizeProvider _authenticationProvider;
-        private HttpClient _httpClient;
         private bool _disposedValue;
         private CookieContainer _cookieContainer;
 
@@ -40,7 +43,7 @@ public void Dispose()
             {
                 await Task.Run(async () =>
                 {
-                    response = await _httpClient.SendAsync(request, cancellationToken);
+                    response = await HttpClient.SendAsync(request, cancellationToken);
                 });
                 await ThrowIfHasExceptionAsync(response);
             }
@@ -83,17 +86,29 @@ protected virtual void Dispose(bool disposing)
             {
                 if (disposing)
                 {
-                    if (this._httpClient != null)
-                    {
-                        this._httpClient.Dispose();
-                    }
+                    HttpClient?.Dispose();
                 }
 
-                this._httpClient = null;
+                HttpClient = null;
                 _disposedValue = true;
             }
         }
 
+        private static string GetBuvid()
+        {
+            if (string.IsNullOrEmpty(_buvid))
+            {
+                var macAddress = NetworkInterface.GetAllNetworkInterfaces()
+                    .Where(nic => nic.OperationalStatus == OperationalStatus.Up && nic.NetworkInterfaceType != NetworkInterfaceType.Loopback)
+                    .Select(nic => nic.GetPhysicalAddress().ToString())
+                    .FirstOrDefault();
+                var buvidObj = new Buvid(macAddress);
+                _buvid = buvidObj.Generate();
+            }
+
+            return _buvid;
+        }
+
         private void InitHttpClient()
         {
             ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;
@@ -108,7 +123,7 @@ private void InitHttpClient()
             var client = new HttpClient(handler);
             client.DefaultRequestHeaders.CacheControl = new CacheControlHeaderValue { NoCache = false, NoStore = false };
             client.DefaultRequestHeaders.Add("accept", ServiceConstants.DefaultAcceptString);
-            this._httpClient = client;
+            this.HttpClient = client;
         }
 
         private async Task ThrowIfHasExceptionAsync(HttpResponseMessage response)

src/Lib/Lib.Implementation/HttpProvider/HttpProvider.cs

@@ -29,7 +29,7 @@ public partial class HttpProvider : IHttpProvider, IDisposable
         /// <param name="authProvider">授权验证模块.</param>
         public HttpProvider(IAuthorizeProvider authProvider)
         {
-            this._authenticationProvider = authProvider;
+            _authenticationProvider = authProvider;
             InitHttpClient();
         }
 
@@ -38,14 +38,14 @@ public TimeSpan OverallTimeout
         {
             get
             {
-                return this._httpClient.Timeout;
+                return HttpClient.Timeout;
             }
 
             set
             {
                 try
                 {
-                    this._httpClient.Timeout = value;
+                    HttpClient.Timeout = value;
                 }
                 catch (InvalidOperationException exception)
                 {
@@ -60,7 +60,7 @@ public TimeSpan OverallTimeout
         }
 
         /// <inheritdoc/>
-        public HttpClient HttpClient { get => _httpClient; }
+        public HttpClient HttpClient { get; private set; }
 
         /// <inheritdoc/>
         public async Task<HttpRequestMessage> GetRequestMessageAsync(
@@ -150,6 +150,7 @@ public async Task<HttpRequestMessage> GetRequestMessageAsync(string url, IMessag
             requestMessage.Headers.Add(Headers.Envoriment, GRPCConfig.Envorienment);
             requestMessage.Headers.Add(Headers.TransferEncodingKey, Headers.TransferEncodingValue);
             requestMessage.Headers.Add(Headers.TEKey, Headers.TEValue);
+            requestMessage.Headers.Add(Headers.Buvid, GetBuvid());
 
             var messageBytes = grpcMessage.ToByteArray();
 

src/Models/Models.App/Constants/ServiceConstants.cs

@@ -238,6 +238,7 @@ public static class Headers
             public const string TransferEncodingValue = "chunked";
             public const string TEKey = "TE";
             public const string TEValue = "trailers";
+            public const string Buvid = "buvid";
         }
 
         public static class Settings

src/Models/Models.gRPC/Buvid.cs

@@ -0,0 +1,57 @@
+// Copyright (c) Richasy. All rights reserved.
+
+#pragma warning disable SA1300 // Element should begin with upper-case letter
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Bili.Models.gRPC
+{
+    /// <summary>
+    /// BUVID.
+    /// </summary>
+    public class Buvid
+    {
+        private readonly string _mac;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Buvid"/> class.
+        /// </summary>
+        /// <param name="macAddress">MAC 地址.</param>
+        public Buvid(string macAddress) => _mac = macAddress;
+
+        /// <summary>
+        /// 生成 buvid.
+        /// </summary>
+        /// <returns>buvid.</returns>
+        public string Generate()
+        {
+            var buvidPrefix = "XY";
+            var inputStrMd5 = GetMd5Hash(_mac.Replace(":", string.Empty));
+
+            var buvidRaw = new StringBuilder();
+            buvidRaw.Append(buvidPrefix);
+            buvidRaw.Append(inputStrMd5[2]);
+            buvidRaw.Append(inputStrMd5[12]);
+            buvidRaw.Append(inputStrMd5[22]);
+            buvidRaw.Append(inputStrMd5);
+
+            return buvidRaw.ToString();
+        }
+
+        private static string GetMd5Hash(string input)
+        {
+            using (var md5 = MD5.Create())
+            {
+                var inputBytes = Encoding.UTF8.GetBytes(input);
+                var hashBytes = md5.ComputeHash(inputBytes);
+                var sb = new StringBuilder();
+                foreach (var b in hashBytes)
+                {
+                    sb.Append(b.ToString("x2"));
+                }
+
+                return sb.ToString();
+            }
+        }
+    }
+}