using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
namespace WindowsFormsApp1
{
public class HttpClientHelper
{
/// <summary>
/// HttpClient的Get请求
/// </summary>
///<param name="url">请求地址,含拼接数据 </param>
/// <returns></returns>
public static string Get(string url)
{
var http = HttpClientFactory.GetHttpClient();
var response1 = http.GetAsync(url).Result;
return response1.Content.ReadAsStringAsync().Result;
}
/// <summary>
/// HttpClient的Post请求
/// 表单提交模式[application/x-www-form-urlencoded]
/// </summary>
/// <param name="url">请求地址,单纯的地址,没有数据拼接</param>
/// <param name="data">请求数据,格式为:"userName=admin&pwd=123456"</param>
/// <returns></returns>
public static string PostForm(string url, string data)
{
var http = HttpClientFactory.GetHttpClient();
var content = new StringContent(data, Encoding.UTF8, "application/x-www-form-urlencoded");
var response = http.PostAsync(url, content).Result;
return response.Content.ReadAsStringAsync().Result;
}
/// <summary>
/// HttpClient的Post请求
/// Json提交模式[application/json]
/// </summary>
/// <param name="url">请求地址,单纯的地址,没有数据拼接</param>
/// <param name="data">请求数据,格式为(Json)对象、或者类对象 </param>
/// <returns></returns>
public static string PostJSON(string url, object data)
{
//调用实例
//var body = new
//{
// userNameOrEmailAddress = "admin",
// password = "123qwe"
//};
//string token = HttpClientHelper.PostJSON("https://localhost:44302/api/TokenAuth/Authenticate", body);
var http = HttpClientFactory.GetHttpClient();
var content = new StringContent(Newtonsoft.Json.JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
var response = http.PostAsync(url, content).Result;
return response.Content.ReadAsStringAsync().Result;
}
}
public class HttpClientFactory
{
private static HttpClient _httpClient = null;
/// <summary>
/// 静态的构造函数：只能有一个，且是无参数的
/// 由CLR保证，只有在程序第一次使用该类之前被调用，而且只能调用一次
/// 说明： keep-alive关键字可以理解为一个长链接，超时时间也可以在上面进行设置，例如10秒的超时时间，当然并发量太大，这个10秒应该会抛弃很多请求
/// 发送请求的代码没有了using，即这个httpclient不会被手动dispose，而是由系统控制它，当然你的程序重启时，这也就被回收了。
/// </summary>
static HttpClientFactory()
{
_httpClient = new System.Net.Http.HttpClient(new HttpClientHandler());
_httpClient.Timeout = new TimeSpan(0, 0, 10);
_httpClient.DefaultRequestHeaders.Connection.Add("keep-alive");
}
/// <summary>
/// 对外开放接口
/// </summary>
/// <returns></returns>
public static HttpClient GetHttpClient()
{
return _httpClient;
}
}
}
