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2024-07-12 19:32:02 +08:00
commit 170f05af0c
13 changed files with 440 additions and 0 deletions
--- a/Services/WeChatUserInfoService.cs
+++ b/Services/WeChatUserInfoService.cs
@@ -0,0 +1,102 @@
+
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.Numerics;
+using Cysharp.Threading.Tasks;
+using Microsoft.Extensions.Logging;
+using Microsoft.VisualBasic;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace WeChatSharp.Services;
+
+public class WeChatUserInfoService
+{
+	private readonly HttpClient _httpClient;
+	private readonly WeChatAccessTokenService accessTokenService;
+	private readonly IWeChatSettings _weChatSettings;
+	private readonly ILogger<WeChatUserInfoService> _logger;
+	private readonly ConcurrentDictionary<string,WeChatUserInfo> weChatUserInfos = new();
+	private readonly ConcurrentDictionary<string,WeChatUserInfo> codeBasedWeChatUserInfos = new();
+	public WeChatUserInfoService(HttpClient httpClient, WeChatAccessTokenService accessTokenService, IWeChatSettings weChatSettings, ILogger<WeChatUserInfoService> logger)
+	{
+		_httpClient = httpClient;
+		this.accessTokenService = accessTokenService;
+		_weChatSettings = weChatSettings;
+		_logger = logger;
+	}
+	public List<WeChatUserInfo> GetCachedWeChatUserInfos()
+	{
+		return weChatUserInfos.Values.ToList();
+	}
+	public async Task<WeChatUserInfo> GetUserInfoByCode(string code)
+	{
+		if (codeBasedWeChatUserInfos.TryGetValue(code, out var userInfo))
+			return userInfo;
+
+		var json = await _httpClient.GetStringAsync(
+			$"""
+https://api.weixin.qq.com/sns/oauth2/access_token?appid={_weChatSettings.AppId}&secret={_weChatSettings.AppSecret}&code={code}&grant_type=authorization_code
+""");
+		var jObject = JsonConvert.DeserializeObject<JObject>(json)!;
+		if (jObject.TryGetValue("errcode", out var value))
+		{
+			var ErrorMessage = jObject["errmsg"]!.ToObject<string>();
+			if (codeBasedWeChatUserInfos.TryGetValue(code, out userInfo))
+			{
+				return userInfo;
+			}
+			
+			throw new InvalidOperationException(ErrorMessage);
+		}
+
+		if (jObject.TryGetValue("openid", out var _token) && jObject.TryGetValue("access_token",out var accessToken))
+		{
+			var openId = _token.ToObject<string>()!;
+			userInfo = await GetUserInfoAsync(openId,accessToken.ToObject<string>()!);
+			
+			_logger.LogInformation($"已经获取到了{code}的用户:{userInfo.OpenId}");;
+			_logger.LogInformation(json);
+
+			codeBasedWeChatUserInfos.TryAdd(code, userInfo);
+			return userInfo;
+		}
+
+		_logger.LogWarning("没有找到OpenId,获取的数据为;");
+		_logger.LogWarning(json);
+		throw new InvalidOperationException("无效的Code");
+	}
+
+	public async Task<WeChatUserInfo> GetUserInfoAsync(string openId,string accessToken=default!)
+	{
+		if(weChatUserInfos.TryGetValue(openId,out var userInfo))
+			return userInfo;
+		userInfo =await GetWeChatUserInfoFromServer(openId,accessToken);
+		weChatUserInfos.TryAdd(openId,userInfo);
+		return userInfo;
+	}
+	private async Task<WeChatUserInfo> GetWeChatUserInfoFromServer(string openId,string _accessToken=default!)
+	{
+		var accessToken = _accessToken;
+		string url;
+		if (string.IsNullOrEmpty(accessToken))
+		{
+			accessToken = await accessTokenService.GetAccessTokenAsync();
+			url = $"https://api.weixin.qq.com/cgi-bin/user/info?access_token={accessToken}&openid={openId}&lang=zh_CN";
+		}
+		else
+		{
+			url = $"https://api.weixin.qq.com/sns/userinfo?access_token={accessToken}&openid={openId}&lang=zh_CN";
+		}
+		var json = await _httpClient.GetStringAsync(url);
+		var jObject = JsonConvert.DeserializeObject<JObject>(json)!;
+
+		if (jObject.ContainsKey("errcode"))
+		{
+			Console.WriteLine(jObject);
+		}
+		
+		var weChatUserInfo = JsonConvert.DeserializeObject<WeChatUserInfo>(json);
+		return weChatUserInfo;
+	}
+}