using Consul;
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using Furion;
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using Furion.FriendlyException;
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using Furion.HttpRemote;
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using Microsoft.Extensions.Caching.Distributed;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace FlexJobApi.Core
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{
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public class ResourceHttpUtils
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{
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private readonly IDistributedCache distributedCache;
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private readonly IHttpRemoteService httpRemoteService;
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private readonly IConsulClient consulClient;
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public ResourceHttpUtils(
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IDistributedCache distributedCache,
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IHttpRemoteService httpRemoteService,
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IConsulClient consulClient)
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{
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this.distributedCache = distributedCache;
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this.httpRemoteService = httpRemoteService;
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this.consulClient = consulClient;
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}
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/// <summary>
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/// 发送HTTP请求
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/// </summary>
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/// <typeparam name="TRequest"></typeparam>
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/// <typeparam name="TResponse"></typeparam>
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/// <param name="request"></param>
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/// <param name="provider"></param>
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/// <returns></returns>
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public async Task<TResponse> SendHttpAsync<TRequest, TResponse>(
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TRequest request,
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IResourceHttpProvider provider = null)
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where TRequest : class, new()
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{
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var requestTypeFullName = typeof(TRequest).FullName;
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var jsonResourceModels = await distributedCache.GetStringAsync($"ResourceModel|{requestTypeFullName}");
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var resource = jsonResourceModels.JsonTo<ResourceModel>();
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var domain = await GetHealthyServiceDomain(resource);
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var builder = HttpRequestBuilder.Create(resource.GetHttpMethod(), $"{domain}{resource.Route}");
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if (resource.Method == EnumResourceMethod.Get)
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builder = builder.WithQueryParameters(request);
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else
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builder = builder.SetJsonContent(request);
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provider = provider ?? new DefaultResourceHttpProvider();
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builder = provider.AddAuthentication(builder);
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var response = await provider.SendAsAsync<TResponse>(httpRemoteService, builder);
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return response;
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}
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/// <summary>
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/// 获取健康服务域名
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/// </summary>
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/// <param name="resource"></param>
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/// <returns></returns>
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public async Task<string> GetHealthyServiceDomain(ResourceModel resource)
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{
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var queryResult = await consulClient.Health.Service(resource.ServiceName, null, true);
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if (queryResult.StatusCode != System.Net.HttpStatusCode.OK)
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throw Oops.Oh(EnumErrorCodeType.s404, $"微服务{resource.Service}");
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var domains = queryResult.Response
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.Select(s => $"http://{s.Service.Address}:{s.Service.Port}")
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.ToList();
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if (domains.IsNull())
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throw Oops.Oh(EnumErrorCodeType.s404, $"微服务{resource.Service}");
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// 轮询选择实例
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int randomIndex = new Random().Next(domains.Count);
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return domains[randomIndex];
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}
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}
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}
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