WechatSharp/Src/Services/WeChatMobileService.cs

using Cysharp.Threading.Tasks;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace WeChatSharp.Services;

public class WeChatMobileService
{
    private readonly ILogger<WeChatMobileService> _logger;
    
    
    public string AppId { get; set; } = string.Empty;
    public string AppSecret { get; set; } = string.Empty;
    
    private readonly HttpClient _httpClient=new();

    public WeChatMobileService(ILogger<WeChatMobileService> logger)
    {
        _logger = logger;
    }

    public async UniTask<WeChatUserInfo> GetUserInfoAsync(string code,string openId)
    {
        var uri = new UriBuilder("https://api.weixin.qq.com/sns/userinfo")
        {
            Query = $"access_token={code}&openid={code}"
        };
        
        _logger.LogInformation($"请求地址:{uri.Uri}");
        
        var response = await _httpClient.GetAsync(uri.Uri);
        
        var json = await response.Content.ReadAsStringAsync();
        var jObject = JsonConvert.DeserializeObject<JObject>(json);
        if (jObject is null)
        {
            throw new NullReferenceException("json为空值");
        }

        if (jObject.TryGetValue("errcode", out var errcode) && jObject.TryGetValue("errmsg", out var errmsg))
        {
            throw new Exception(errmsg.ToObject<string>());
        }

        if (!jObject.TryGetValue("openid", out var openid))
            throw new InvalidOperationException("获取OpenId失败")
            {
                Source = json
            };
        _logger.LogInformation($"获取OpenId成功:{openid.ToObject<string>()}");
        return jObject.ToObject<WeChatUserInfo>() ?? new WeChatUserInfo();
    }
    public async UniTask<WeChatAccessToken> GetAccessCodeAsync(string code)
    {
        var uri = new UriBuilder("https://api.weixin.qq.com/sns/oauth2/access_token")
        {
            Query = $"appid={AppId}&secret={AppSecret}&code={code}&grant_type=authorization_code"
        };
        var response = await _httpClient.GetAsync(uri.Uri);
        var json = await response.Content.ReadAsStringAsync();
        var jObject = JsonConvert.DeserializeObject<JObject>(json);
        if (jObject is null)
        {
            throw new NullReferenceException("json为空值");
        }
        if (jObject.TryGetValue("errcode", out var errcode) && jObject.TryGetValue("errmsg", out var errmsg))
        {
            throw new Exception(errmsg.ToObject<string>());
        }

        if (!jObject.TryGetValue("access_token", out var token))
            throw new InvalidOperationException("获取AccessToken失败")
            {
                Source = json
            };
        _logger.LogInformation($"获取AccessToken成功:{token.ToObject<string>()}");
        
        return jObject.ToObject<WeChatAccessToken>() ?? new WeChatAccessToken();
    }
}