329 lines
10 KiB
C#
329 lines
10 KiB
C#
using Newtonsoft.Json;
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using System;
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using System.IO;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using 報到系統客戶端.Models;
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namespace 報到系統客戶端.Services
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{
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/// <summary>
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/// API 服務基礎類別
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/// 處理 HTTP 請求、Session cookie、錯誤處理
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/// </summary>
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public class ApiService
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{
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private static ApiService _instance;
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private static readonly object _lockObject = new object();
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private string _baseUrl;
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private CookieContainer _cookieContainer;
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// 用於儲存 cookie 的檔案路徑
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private string _cookiePath;
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public static JsonSerializerSettings jsonConvertSettings = new JsonSerializerSettings { DateTimeZoneHandling = DateTimeZoneHandling.Local };
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public static object DeserializeObject(string value)
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{
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return JsonConvert.DeserializeObject(value, jsonConvertSettings);
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}
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public static T DeserializeObject<T>(string value)
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{
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return (T)JsonConvert.DeserializeObject(value, typeof(T), jsonConvertSettings);
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}
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/// <summary>
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/// 取得單例實例
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/// </summary>
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public static ApiService Instance
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{
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get
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{
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if (_instance == null)
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{
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lock (_lockObject)
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{
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if (_instance == null)
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{
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_instance = new ApiService();
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}
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}
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}
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return _instance;
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}
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}
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private ApiService()
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{
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// 從設定檔讀取基底 URL
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_baseUrl = ConfigService.Instance.GetApiBaseUrl();
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if (string.IsNullOrWhiteSpace(_baseUrl))
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{
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_baseUrl = "http://localhost:58792";
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}
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// 初始化 Cookie 容器
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_cookieContainer = new CookieContainer();
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_cookiePath = Path.Combine(
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Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
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"報到系統客戶端",
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"cookies.txt"
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);
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// 嘗試載入已儲存的 Cookie
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LoadCookies();
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}
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/// <summary>
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/// 設定基底 URL
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/// </summary>
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public string BaseUrl
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{
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set
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{
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_baseUrl = value;
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}
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get
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{
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return _baseUrl;
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}
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}
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/// <summary>
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/// 執行 POST 請求
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/// </summary>
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public async Task<BaseResponse> PostAsync(string servicePath, string methodName, object parameters)
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{
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try
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{
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string url = $"{_baseUrl}{servicePath}/{methodName}";
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
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request.Method = "POST";
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request.ContentType = "application/json; charset=utf-8";
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request.CookieContainer = _cookieContainer;
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request.KeepAlive = true;
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// 序列化參數
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string jsonData = JsonConvert.SerializeObject(parameters ?? new { });
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// 寫入請求體
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byte[] data = Encoding.UTF8.GetBytes(jsonData);
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request.ContentLength = data.Length;
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using (Stream requestStream = request.GetRequestStream())
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{
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await requestStream.WriteAsync(data, 0, data.Length);
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}
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// 取得回應
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using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
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{
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// 更新 Cookie（用於 Session 管理）
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_cookieContainer.Add(response.ResponseUri, response.Cookies);
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SaveCookies();
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using (StreamReader reader = new StreamReader(response.GetResponseStream()))
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{
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string responseJson = await reader.ReadToEndAsync();
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// 解析回應
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dynamic result = DeserializeObject(responseJson);
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// ASP.NET Web Service 會將結果包在 "d" 屬性中
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if (result.d != null)
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{
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string dataJson = JsonConvert.SerializeObject(result.d);
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return DeserializeObject<BaseResponse>(dataJson);
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}
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else
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{
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return DeserializeObject<BaseResponse>(responseJson);
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}
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}
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}
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}
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catch (WebException ex)
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{
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return new BaseResponse
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{
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Success = false,
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Message = $"網路錯誤: {ex.Message}"
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};
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}
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catch (Exception ex)
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{
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return new BaseResponse
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{
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Success = false,
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Message = $"錯誤: {ex.Message}"
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};
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}
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}
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/// <summary>
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/// 同步版本的 POST 請求（用於向後相容）
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/// </summary>
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public BaseResponse Post(string servicePath, string methodName, object parameters)
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{
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try
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{
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string url = $"{_baseUrl}{servicePath}/{methodName}";
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HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
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request.Method = "POST";
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request.ContentType = "application/json; charset=utf-8";
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request.CookieContainer = _cookieContainer;
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request.KeepAlive = true;
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// 序列化參數
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string jsonData = JsonConvert.SerializeObject(parameters ?? new { });
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// 寫入請求體
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byte[] data = Encoding.UTF8.GetBytes(jsonData);
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request.ContentLength = data.Length;
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using (Stream requestStream = request.GetRequestStream())
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{
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requestStream.Write(data, 0, data.Length);
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}
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// 取得回應
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using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
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{
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// 更新 Cookie（用於 Session 管理）
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_cookieContainer.Add(response.ResponseUri, response.Cookies);
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SaveCookies();
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using (StreamReader reader = new StreamReader(response.GetResponseStream()))
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{
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string responseJson = reader.ReadToEnd();
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// 解析回應
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dynamic result = DeserializeObject(responseJson);
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// ASP.NET Web Service 會將結果包在 "d" 屬性中
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if (result.d != null)
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{
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string dataJson = JsonConvert.SerializeObject(result.d);
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return DeserializeObject<BaseResponse>(dataJson);
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}
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else
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{
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return DeserializeObject<BaseResponse>(responseJson);
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}
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}
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}
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}
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catch (WebException ex)
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{
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return new BaseResponse
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{
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Success = false,
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Message = $"網路錯誤: {ex.Message}"
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};
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}
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catch (Exception ex)
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{
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return new BaseResponse
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{
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Success = false,
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Message = $"錯誤: {ex.Message}"
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};
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}
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}
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/// <summary>
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/// 清除所有 Session cookie
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/// </summary>
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public void ClearSession()
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{
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_cookieContainer = new CookieContainer();
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DeleteCookies();
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}
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/// <summary>
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/// 儲存 Cookie 到檔案
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/// </summary>
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private void SaveCookies()
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{
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try
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{
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string directory = Path.GetDirectoryName(_cookiePath);
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if (!Directory.Exists(directory))
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{
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Directory.CreateDirectory(directory);
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}
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using (StreamWriter sw = new StreamWriter(_cookiePath, false, Encoding.UTF8))
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{
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foreach (Cookie cookie in _cookieContainer.GetCookies(new Uri(_baseUrl)))
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{
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sw.WriteLine($"{cookie.Name}={cookie.Value}");
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}
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}
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}
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catch
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{
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// 忽略儲存錯誤
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}
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}
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/// <summary>
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/// 從檔案載入 Cookie
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/// </summary>
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private void LoadCookies()
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{
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try
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{
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if (File.Exists(_cookiePath))
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{
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using (StreamReader sr = new StreamReader(_cookiePath, Encoding.UTF8))
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{
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string line;
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while ((line = sr.ReadLine()) != null)
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{
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if (string.IsNullOrWhiteSpace(line)) continue;
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string[] parts = line.Split(new[] { '=' }, 2);
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if (parts.Length == 2)
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{
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Cookie cookie = new Cookie(parts[0], parts[1])
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{
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Path = "/",
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HttpOnly = true
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};
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_cookieContainer.Add(new Uri(_baseUrl), cookie);
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}
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}
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}
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}
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}
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catch
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{
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// 忽略載入錯誤
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}
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}
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/// <summary>
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/// 刪除儲存的 Cookie 檔案
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/// </summary>
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private void DeleteCookies()
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{
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try
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{
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if (File.Exists(_cookiePath))
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{
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File.Delete(_cookiePath);
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}
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}
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catch
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{
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// 忽略刪除錯誤
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}
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}
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}
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}
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