using Aliyun.OSS;
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using Azure.Core;
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using FlexJobApi.Core.Utils.WxmpUtils;
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using Furion.FriendlyException;
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using Furion.HttpRemote;
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using Mapster;
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using Microsoft.Extensions.Caching.Distributed;
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using Microsoft.Extensions.Options;
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using Newtonsoft.Json;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net.Http.Json;
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using System.Text;
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using System.Text.Json.Nodes;
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using System.Threading;
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using System.Threading.Tasks;
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namespace FlexJobApi.Core
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{
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/// <summary>
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/// 微信小程序工具
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/// </summary>
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public class WxmpUtils
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{
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private readonly IOptions<WxmpOptions> options;
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private readonly IHttpRemoteService httpRemoteService;
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private readonly IDistributedCache distributedCache;
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public WxmpUtils(
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IOptions<WxmpOptions> options,
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IHttpRemoteService httpRemoteService,
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IDistributedCache distributedCache)
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{
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this.options = options;
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this.httpRemoteService = httpRemoteService;
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this.distributedCache = distributedCache;
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}
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public async Task<WxmpSnsJscode2sessionResponse> SnsJscode2sessionAsync(EnumUserType userType, string code, CancellationToken cancellationToken = default)
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{
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var option = options.Value.Items.FirstOrDefault(it => it.Code == userType.ToString());
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if (option == null || option.AppId.IsNull() || option.AppSecret.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s400, "登录失败，缺失配置：WxmpOptions");
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if (code.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s400, "请填写WxmpCode");
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var callback = await httpRemoteService.GetAsAsync<WxmpSnsJscode2sessionResponse>("https://api.weixin.qq.com/sns/jscode2session",
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builder => builder.WithQueryParameters(new Dictionary<string, string>
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{
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{ "appid", option.AppId },
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{ "secret", option.AppSecret },
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{ "js_code", code },
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{ "grant_type", "authorization_code" }
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}));
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if (callback == null || callback.errcode != 0)
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throw Oops.Oh(EnumErrorCodeType.s510, $"登录失败：{callback.errmsg}，请联系管理员");
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return callback;
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}
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/// <summary>
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/// 获取小程序接口调用凭据
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/// </summary>
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/// <param name="userType"></param>
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/// <returns></returns>
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public async Task<string> GetAccessToken(EnumUserType userType)
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{
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var cacheKey = $"Wxmp|{userType}|AccessToken";
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var accessToken = await distributedCache.GetStringAsync(cacheKey);
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if (accessToken.IsNull())
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{
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var option = options.Value.Items.FirstOrDefault(it => it.Code == userType.ToString());
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if (option == null || option.AppId.IsNull() || option.AppSecret.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s400, "获取小程序接口调用凭据失败，缺失配置：WxmpOptions");
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var request = new WxmpGetAccessTokenRequest
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{
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Appid = option.AppId,
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Secret = option.AppSecret,
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};
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var response = await httpRemoteService.GetAsStringAsync("https://api.weixin.qq.com/cgi-bin/token",
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builder => builder.WithQueryParameters(JsonObject.Parse(request.ToJson())));
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var callback = response.JsonTo<WxmpGetAccessTokenResponse>();
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if (callback == null && callback.AccessToken.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s510, "获取小程序接口调用凭据失败");
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accessToken = callback.AccessToken;
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await distributedCache.SetStringAsync(cacheKey, accessToken, new DistributedCacheEntryOptions
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{
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AbsoluteExpirationRelativeToNow = TimeSpan.FromSeconds(callback.ExpiresIn - 300)
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});
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}
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return accessToken;
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}
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/// <summary>
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/// 获取小程序码
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/// </summary>
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/// <param name="command"></param>
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/// <returns></returns>
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public async Task<string> GetQrCodeOssUrl(WxmpGetQrCodeCommand command)
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{
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var option = options.Value.Items.FirstOrDefault(it => it.Code == command.UserType.ToString());
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if (option == null || option.AppId.IsNull() || option.AppSecret.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s400, "获取小程序码失败，缺失配置：WxmpOptions");
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command.EnvVersion = option.EnvVersion;
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var accessToken = await GetAccessToken(command.UserType);
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var request = command.Adapt<WxmpGetQrCodeRequest>();
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var jsonContent = JsonConvert.SerializeObject(request, new JsonSerializerSettings
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{
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NullValueHandling = NullValueHandling.Ignore
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});
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var response = await httpRemoteService.PostAsync("https://api.weixin.qq.com/wxa/getwxacodeunlimit",
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builder => builder
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.WithQueryParameter("access_token", accessToken)
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.SetJsonContent(jsonContent));
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response.EnsureSuccessStatusCode();
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if (response.Content.Headers.ContentType.ToString() == "application/json; charset=UTF-8")
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{
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var jsonResult = await response.Content.ReadAsStringAsync();
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var callback = jsonResult.JsonTo<WxmpGetQrCodeResponse>();
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if (callback == null || callback.ErrorCode != 0)
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throw Oops.Oh(EnumErrorCodeType.s510, $"获取小程序码失败：{callback.ErrorMessage}，请联系管理员");
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}
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var stream = await response.Content.ReadAsStreamAsync();
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var result = AliyunOSSUtils.Upload(command.OssScene, stream, command.OssFileName);
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return result.Url;
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}
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}
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}
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