在framework中，大量并发 HttpWebRequest 需要设置一个最大连接数
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ServicePointManager.DefaultConnectionLimit = 200;
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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
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public void ConfigureServices(IServiceCollection services)
{
services.AddHttpClient("HttpClientFactoryDemo");
}
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然后在Controller中创建
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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));
}
}
}
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总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对服务器之家的支持。
原文链接：https://blog.csdn.net/lee576/article/details/85007730