AssetManager.API/AssetManager.Services/Services/WechatService.cs

using System.Net.Http;
using System.Text.Json;
using System.Threading.Tasks;

namespace AssetManager.Services.Services;

public class WechatService
{
    private readonly HttpClient _httpClient;
    private readonly string _appId;
    private readonly string _appSecret;

    public WechatService(HttpClient httpClient)
    {
        _httpClient = httpClient;
        _appId = "your-wechat-app-id"; // 替换为实际的微信小程序AppId
        _appSecret = "your-wechat-app-secret"; // 替换为实际的微信小程序AppSecret
    }

    public async Task<WechatAuthResult> GetOpenIdAsync(string code)
    {
        var url = $"https://api.weixin.qq.com/sns/jscode2session?appid={_appId}&secret={_appSecret}&js_code={code}&grant_type=authorization_code";
        var response = await _httpClient.GetAsync(url);
        response.EnsureSuccessStatusCode();
        var content = await response.Content.ReadAsStringAsync();
        return JsonSerializer.Deserialize<WechatAuthResult>(content);
    }
}

public class WechatAuthResult
{
    public string OpenId { get; set; }
    public string SessionKey { get; set; }
    public string UnionId { get; set; }
    public int Errcode { get; set; }
    public string Errmsg { get; set; }
}