添加项目文件。

Utils.cs

@@ -0,0 +1,106 @@
+using System.Net;
+
+namespace MegghysAPI
+{
+    public static class Utils
+    {
+        public static readonly HttpClient _client = new(new HttpClientHandler()
+        {
+            AutomaticDecompression = DecompressionMethods.All,
+        })
+        {
+            //Timeout = new TimeSpan(0, 0, 15),
+        };
+
+        public static HttpResponseMessage Request(string address) => RequestAsync(address).Result;
+        public static async Task<HttpResponseMessage?> RequestAsync(string address, Dictionary<string, string> header = null)
+        {
+            try
+            {
+                var uri = new Uri(address);
+                var request = new HttpRequestMessage(HttpMethod.Get, uri);
+                if (header?.Count > 0)
+                {
+                    foreach (var h in header)
+                    {
+                        request.Headers.TryAddWithoutValidation(h.Key, h.Value);
+                    }
+                }
+                return await _client.SendAsync(request);
+            }
+            catch (Exception ex)
+            {
+                Logs.Error((ex.InnerException ?? ex).Message);
+                return null;
+            }
+        }
+        public static async Task<string?> RequestStringAsync(string address, Dictionary<string, string> header = null)
+        {
+            try
+            {
+                var uri = new Uri(address);
+                if (uri.Host.EndsWith("bilibili.com"))
+                {
+                    header ??= [];
+                    header.TryAdd("Referer", "https://" + uri.Host);
+                }
+                var result = await RequestAsync(address, header);
+                var content = await result?.Content.ReadAsStringAsync();
+                if (result?.IsSuccessStatusCode != true)
+                {
+                    Logs.Warn($"请求失败: {address} {result?.StatusCode}: {content[..100]}");
+                }
+                return content;
+            }
+            catch (Exception ex)
+            {
+                Logs.Error(ex);
+                return null;
+            }
+        }
+        public static string RequestString(string address, Dictionary<string, string> header = null) => RequestStringAsync(address, header).Result;
+        public static async Task<(HttpStatusCode code, byte[] data)> DownloadBytesAsync(string uri)
+        {
+            try
+            {
+                return (HttpStatusCode.OK, await _client.GetByteArrayAsync(uri));
+            }
+            catch (HttpRequestException ex)
+            {
+                return (ex.StatusCode ?? HttpStatusCode.BadRequest, null);
+            }
+            catch (Exception ex)
+            {
+                Logs.Error(ex);     // 返回false下载失败
+                return (HttpStatusCode.BadRequest, null);
+            }
+        }
+        public static async Task<(HttpStatusCode code, string path)> DownloadFileAsync(string url, string path = null, bool resume = true)
+        {
+            path ??= Datas.TempFilePath;
+            var dire = Path.GetDirectoryName(path);
+            if (!Directory.Exists(dire))
+                Directory.CreateDirectory(dire);
+            try
+            {
+                var result = await DownloadBytesAsync(url);
+                if (result.code == HttpStatusCode.OK)
+                {
+                    await File.WriteAllBytesAsync(path, result.data);
+                    return (HttpStatusCode.OK, path);
+                }
+                else
+                    return (result.code, null);
+            }
+            catch (HttpRequestException webex)
+            {
+                return (webex.StatusCode ?? HttpStatusCode.BadRequest, null);
+            }
+            catch (Exception ex)
+            {
+                Logs.Error(ex);     // 返回false下载失败
+                return (HttpStatusCode.BadRequest, null);
+            }
+        }
+    }
+}