69 lines
2.6 KiB
C#
69 lines
2.6 KiB
C#
using Microsoft.Extensions.Options;
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using System.Net.Http.Json;
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using System.Text.Json.Serialization;
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using TakeoutSaaS.Application.Identity.Abstractions;
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using TakeoutSaaS.Infrastructure.Identity.Options;
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using TakeoutSaaS.Shared.Abstractions.Constants;
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using TakeoutSaaS.Shared.Abstractions.Exceptions;
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namespace TakeoutSaaS.Infrastructure.Identity.Services;
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/// <summary>
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/// 微信 code2Session 实现
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/// </summary>
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public sealed class WeChatAuthService(HttpClient httpClient, IOptions<WeChatMiniOptions> options) : IWeChatAuthService
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{
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private readonly WeChatMiniOptions _options = options.Value;
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public async Task<WeChatSessionInfo> Code2SessionAsync(string code, CancellationToken cancellationToken = default)
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{
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var requestUri = $"sns/jscode2session?appid={Uri.EscapeDataString(_options.AppId)}&secret={Uri.EscapeDataString(_options.Secret)}&js_code={Uri.EscapeDataString(code)}&grant_type=authorization_code";
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using var response = await httpClient.GetAsync(requestUri, cancellationToken);
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response.EnsureSuccessStatusCode();
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var payload = await response.Content.ReadFromJsonAsync<WeChatSessionResponse>(cancellationToken: cancellationToken);
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if (payload == null)
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{
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throw new BusinessException(ErrorCodes.Unauthorized, "微信登录失败：响应为空");
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}
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if (payload.ErrorCode.HasValue && payload.ErrorCode.Value != 0)
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{
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var message = string.IsNullOrWhiteSpace(payload.ErrorMessage)
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? $"微信登录失败，错误码：{payload.ErrorCode}"
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: payload.ErrorMessage;
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throw new BusinessException(ErrorCodes.Unauthorized, message);
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}
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if (string.IsNullOrWhiteSpace(payload.OpenId) || string.IsNullOrWhiteSpace(payload.SessionKey))
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{
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throw new BusinessException(ErrorCodes.Unauthorized, "微信登录失败：返回数据无效");
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}
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return new WeChatSessionInfo
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{
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OpenId = payload.OpenId,
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UnionId = payload.UnionId,
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SessionKey = payload.SessionKey
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};
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}
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private sealed class WeChatSessionResponse
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{
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[JsonPropertyName("openid")]
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public string? OpenId { get; set; }
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[JsonPropertyName("unionid")]
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public string? UnionId { get; set; }
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[JsonPropertyName("session_key")]
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public string? SessionKey { get; set; }
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[JsonPropertyName("errcode")]
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public int? ErrorCode { get; set; }
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[JsonPropertyName("errmsg")]
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public string? ErrorMessage { get; set; }
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}
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}
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