基于C#实现任意格式JSON文本的HTTP交互抽象类

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

public abstract class JsonHttpClient
{
    // HttpClient实例，用于发送HTTP请求
    private readonly HttpClient _httpClient;

    // 构造函数，初始化HttpClient
    protected JsonHttpClient()
    {
        _httpClient = new HttpClient();
    }

    // 发送HTTP请求的抽象方法，子类必须实现
    protected abstract Task<HttpResponseMessage> SendRequestAsync(HttpRequestMessage request);

    // 发送HTTP GET请求
    public async Task<string> GetAsync(string uri)
    {
        // 创建HTTP GET请求
        var request = new HttpRequestMessage(HttpMethod.Get, uri);

        // 发送请求并获取响应
        var response = await SendRequestAsync(request);

        // 确保响应成功
        response.EnsureSuccessStatusCode();

        // 读取响应内容并返回
        return await response.Content.ReadAsStringAsync();
    }

    // 发送HTTP POST请求
    public async Task<string> PostAsync(string uri, string jsonContent)
    {
        // 创建HTTP POST请求
        var request = new HttpRequestMessage(HttpMethod.Post, uri)
        {
            Content = new StringContent(jsonContent, Encoding.UTF8, "application/json")
        };

        // 发送请求并获取响应
        var response = await SendRequestAsync(request);

        // 确保响应成功
        response.EnsureSuccessStatusCode();

        // 读取响应内容并返回
        return await response.Content.ReadAsStringAsync();
    }

    // 发送HTTP PUT请求
    public async Task<string> PutAsync(string uri, string jsonContent)
    {
        // 创建HTTP PUT请求
        var request = new HttpRequestMessage(HttpMethod.Put, uri)
        {
            Content = new StringContent(jsonContent, Encoding.UTF8, "application/json")
        };

        // 发送请求并获取响应
        var response = await SendRequestAsync(request);

        // 确保响应成功
        response.EnsureSuccessStatusCode();

        // 读取响应内容并返回
        return await response.Content.ReadAsStringAsync();
    }

    // 发送HTTP DELETE请求
    public async Task<string> DeleteAsync(string uri)
    {
        // 创建HTTP DELETE请求
        var request = new HttpRequestMessage(HttpMethod.Delete, uri);

        // 发送请求并获取响应
        var response = await SendRequestAsync(request);

        // 确保响应成功
        response.EnsureSuccessStatusCode();

        // 读取响应内容并返回
        return await response.Content.ReadAsStringAsync();
    }
}

public class MyHttpClient : JsonHttpClient
{
    // 实现SendRequestAsync方法
    protected override async Task<HttpResponseMessage> SendRequestAsync(HttpRequestMessage request)
    {
        // 使用HttpClient发送请求并返回响应
        return await _httpClient.SendAsync(request);
    }
}

using System;
using System.Threading.Tasks;

class Program
{
    static async Task Main(string[] args)
    {
        // 创建MyHttpClient实例
        var httpClient = new MyHttpClient();

        // 定义API的URL
        string apiUrl = "https://jsonplaceholder.typicode.com/posts";

        try
        {
            // 发送HTTP GET请求
            string response = await httpClient.GetAsync(apiUrl);

            // 将响应内容显示在控制台
            Console.WriteLine("Response from GET request:");
            Console.WriteLine(response);

            // 发送HTTP POST请求
            string postData = "{\"title\": \"foo\", \"body\": \"bar\", \"userId\": 1}";
            string postResponse = await httpClient.PostAsync(apiUrl, postData);

            // 将响应内容显示在控制台
            Console.WriteLine("Response from POST request:");
            Console.WriteLine(postResponse);
        }
        catch (HttpRequestException e)
        {
            // 处理HTTP请求异常
            Console.WriteLine("HTTP Request Error: " + e.Message);
        }
        catch (Exception e)
        {
            // 处理其他异常
            Console.WriteLine("Error: " + e.Message);
        }
    }
}