本篇文章给大家分享的是有关如何在.net core中使用HttpWebRequest发送并发请求,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。

在framework中,大量并发 HttpWebRequest 需要设置一个较大连接数
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 Get()
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
string xmlContent = "1 08A9999999 0002900F0370588 93b4efa6d0d84808a76355ff0f7a178d G1+TBpyEVwsQjeJ9X7zrObRTFtI/ItuJWEEYl3AT/9XlFd844Jv2Wb/gNVkuEVP890Tf1Ub+EaTe1qByHSu97cpQr6riuDxqw2nnjKZBZsG00C1d8070sZPf4c1hkSUfhlR2nPn+7dvIanLCjRFzTgoTQ/WtcArrL/SJIJeaXYg= ALIPAY 卡盟测试 2018121302054468584629 1 127.0.0.1 20181213020544 288232051781304899 1 ";
xmlContent = UrlEncode(xmlContent, Encoding.GetEncoding("GBK"));
Dictionary nvs = new Dictionary { { "req", xmlContent } };
Encoding encoding = Encoding.GetEncoding("GBK");
StringBuilder buffer = new StringBuilder();
int i = 0;
IDictionary sortedParams = new SortedDictionary(nvs);
foreach (KeyValuePair 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("/tupian/20230522/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));
}
}
} 以上就是如何在.net core中使用HttpWebRequest发送并发请求,小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注创新互联行业资讯频道。