内容简介:在framework中,大量并发 HttpWebRequest 需要设置一个最大连接数但是在.net core中却无效,因为core不使用 ServicePointManager 管理连接数,在core中只有使用HttpClient,HttpCilentFactory来管理连接数,如果在core中使用 ServicePointManager 不但不起作用,并且大量并发使用 HttpWebRequest 会导致 IIS 直接假死,所以在core中,只能使用 HttpClient 和 HttpCilentFa
在framework中,大量并发 HttpWebRequest 需要设置一个最大连接数
ServicePointManager.DefaultConnectionLimit = 200;
但是在.net core中却无效,因为core不使用 ServicePointManager 管理连接数,在core中只有使用HttpClient,HttpCilentFactory来管理连接数,如果在core中使用 ServicePointManager 不但不起作用,并且大量并发使用 HttpWebRequest 会导致 IIS 直接假死,所以在core中,只能使用 HttpClient 和 HttpCilentFactory这一条路可走
在Core中的StartUp注册一个HttpClient的名字
public void ConfigureServices(IServiceCollection services)
{
services.AddHttpClient("HttpClientFactoryDemo");
}
然后在Controller中创建
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using Microsoft.AspNetCore.Mvc;
namespace HttpClientFactoryDemo.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class ValuesController : ControllerBase
{
private readonly IHttpClientFactory _httpClientFactory;
public ValuesController(IHttpClientFactory httpClientFactory)
{
_httpClientFactory = httpClientFactory;
}
public static string UrlEncode(string temp, Encoding encoding)
{
StringBuilder stringBuilder = new StringBuilder();
for (int i = 0; i < temp.Length; i++)
{
string t = temp[i].ToString();
string k = HttpUtility.UrlEncode(t, encoding);
if (t == k)
{
stringBuilder.Append(t);
}
else
{
stringBuilder.Append(k.ToUpper());
}
}
return stringBuilder.ToString();
}
[HttpGet]
public async Task<ActionResult> Get()
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
string xmlContent = "<?xml version=\"1.0\" encoding=\"GBK\" standalone=\"yes\"?><xml><version>1</version><ins_cd>08A9999999</ins_cd><mchnt_cd>0002900F0370588</mchnt_cd><term_id></term_id><random_str>93b4efa6d0d84808a76355ff0f7a178d</random_str><sign>G1+TBpyEVwsQjeJ9X7zrObRTFtI/ItuJWEEYl3AT/9XlFd844Jv2Wb/gNVkuEVP890Tf1Ub+EaTe1qByHSu97cpQr6riuDxqw2nnjKZBZsG00C1d8070sZPf4c1hkSUfhlR2nPn+7dvIanLCjRFzTgoTQ/WtcArrL/SJIJeaXYg=</sign><order_type>ALIPAY</order_type><goods_des>卡盟测试</goods_des><goods_detail></goods_detail><addn_inf></addn_inf><mchnt_order_no>2018121302054468584629</mchnt_order_no><curr_type></curr_type><order_amt>1</order_amt><term_ip>127.0.0.1</term_ip><txn_begin_ts>20181213020544</txn_begin_ts><goods_tag></goods_tag><auth_code>288232051781304899</auth_code><sence>1</sence><reserved_sub_appid></reserved_sub_appid><reserved_limit_pay></reserved_limit_pay></xml>";
xmlContent = UrlEncode(xmlContent, Encoding.GetEncoding("GBK"));
Dictionary<string, string> nvs = new Dictionary<string, string> { { "req", xmlContent } };
Encoding encoding = Encoding.GetEncoding("GBK");
StringBuilder buffer = new StringBuilder();
int i = 0;
IDictionary<string, string> sortedParams = new SortedDictionary<string, string>(nvs);
foreach (KeyValuePair<string, string> kvp in nvs)
{
buffer.AppendFormat(i > 0 ? "&{0}={1}" : "{0}={1}", kvp.Key,
UrlEncode(kvp.Value, Encoding.GetEncoding("GBK")));
i++;
}
byte[] postBody = encoding.GetBytes(buffer.ToString());
var client = _httpClientFactory.CreateClient("HttpClientFactoryDemo");
var request = new HttpRequestMessage
{
RequestUri = new Uri("https://spay.fuiou.com/commonQuery"),
Method = HttpMethod.Post,
Content = new ByteArrayContent(postBody),
};
request.Content.Headers.ContentType =
new MediaTypeHeaderValue("application/x-www-form-urlencoded");
return Ok(await client.SendAsync(request));
}
}
}
以上所述就是小编给大家介绍的《.net core 中并发请求发送HttpWebRequest的坑》,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持!
猜你喜欢:- java中如何模拟真正的并发请求?
- easyhttp v1.1发布,新增异步并发请求
- 微信小程序解除 10 个请求并发限制了?!
- C#实现请求唯一性校验支持高并发
- 达达O2O后台架构演进实践:从0到4000高并发请求背后的努力
- 第四范式推软硬件一体化AI集成系统,支持百万级实时并发请求
本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们。
The Zen of CSS Design
Dave Shea、Molly E. Holzschlag / Peachpit Press / 2005-2-27 / USD 44.99
Proving once and for all that standards-compliant design does not equal dull design, this inspiring tome uses examples from the landmark CSS Zen Garden site as the foundation for discussions on how to......一起来看看 《The Zen of CSS Design》 这本书的介绍吧!