http请求端口占用异常——处理思路
解决思路:
1. ESTABLISHED 过多,使用static解决
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | static HttpClientHandler StaticHttpClientHandler = new HttpClientHandler { AllowAutoRedirect = true , Proxy = new System.Net.WebProxy(ConfigHelper.FacebookProxyHostUrl) }; static HttpClient StaticHttpClient = new HttpClient(StaticHttpClientHandler, false ) { Timeout = TimeSpan.FromSeconds(10) }; [HttpGet] [Route(nameof(TestProxy))] public async Task< bool > TestProxy() { string siteUrl = "https://www.google.com" ; var httpClient = StaticHttpClient; var requestMessage = new HttpRequestMessage { Method = HttpMethod.Get, RequestUri = new Uri(siteUrl, UriKind.Absolute), }; var result =await httpClient.SendAsync(requestMessage, HttpCompletionOption.ResponseHeadersRead); result.EnsureSuccessStatusCode(); return true ; } |
2.方案1导致ESTABLISHED 控制住,但是CLOSE_WAIT太多,使用IHttpClientFactory解决
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | //Startup.cs中的public void ConfigureServices(IServiceCollection services) services.AddHttpClient(); services.AddHttpClient( "configured-proxy-handler" ) .ConfigurePrimaryHttpMessageHandler(() => { return new HttpClientHandler() { AllowAutoRedirect = true , Proxy = new System.Net.WebProxy(ConfigHelper.FacebookProxyHostUrl) }; }); //使用 private readonly IHttpClientFactory _httpClientFactory; public OpsController(IHttpClientFactory httpClientFactory) { _httpClientFactory = httpClientFactory; } [HttpGet] [Route(nameof(TestProxy3))] public async Task< bool > TestProxy3() { string siteUrl = "https://www.google.com" ; var httpClient = _httpClientFactory.CreateClient( "configured-proxy-handler" ); httpClient.Timeout = TimeSpan.FromSeconds(10); try { var requestMessage = new HttpRequestMessage { Method = HttpMethod.Get, RequestUri = new Uri(siteUrl, UriKind.Absolute), }; var result = await httpClient.GetAsync(siteUrl, HttpCompletionOption.ResponseHeadersRead); result.EnsureSuccessStatusCode(); return true ; } catch (Exception ex) { return false ; } } |
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