C# HTTP幫助類

HTTP請求型別列舉

namespace Demo
{
    /// <summary>
    /// HTTP請求型別
    /// </summary>
    public enum HttpRequestType
    {
        /// <summary>
        /// GET請求
        /// </summary>
        GET,
        /// <summary>
        /// POST請求
        /// </summary>
        POST,
        /// <summary>
        /// PUT請求
        /// </summary>
        PUT,
        /// <summary>
        /// DELETE請求
        /// </summary>
        DELETE,
    }
}

HTTP幫助類

using Newtonsoft.Json;
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace Demo
{
    /// <summary>
    /// HTTP幫助類
    /// </summary>
    public static class HttpHelper
    {
        /// <summary>
        /// HTTP請求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="jwt"></param>
        /// <param name="requestType"></param>
        /// <param name="data"></param>
        /// <param name="encoding"></param>
        /// <param name="mediaType"></param>
        /// <returns></returns>
        /// <exception cref="CustomException"></exception>
        public static async Task<string> HttpRequestAsync(string url, string jwt = null, HttpRequestType? requestType = HttpRequestType.GET, string data = null, Encoding encoding = null, string mediaType = "application/json")
        {
            // 忽略SSL驗證
            HttpClientHandler handler = new HttpClientHandler();
            handler.ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => true;
            // HTTP客戶端
            using HttpClient client = new HttpClient();
            // 設定JWT身份驗證頭
            if (jwt != null)
            {
                client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", jwt);
            }
            // 構造請求內容
            StringContent content = new StringContent(string.Empty);
            if (data != null)
            {
                content = new StringContent(JsonConvert.SerializeObject(data), encoding ??= Encoding.UTF8, mediaType);
            }
            // 發起請求
            Logger.Info(String.Format("http request,  url: {0}, type: {1}, body: {2}", url, requestType, data));
            HttpResponseMessage response = null;
            // 判斷請求型別
            switch (requestType)
            {
                case HttpRequestType.GET:
                    response = await client.GetAsync(url);
                    break;
                case HttpRequestType.POST:
                    response = await client.PostAsync(url, content);
                    break;
                case HttpRequestType.PUT:
                    response = await client.PutAsync(url, content);
                    break;
                case HttpRequestType.DELETE:
                    response = await client.DeleteAsync(url);
                    break;
            }
            // 檢查響應是否成功
            if (response?.IsSuccessStatusCode == true)
            {
                // 讀取響應內容
                string responseBody = await response.Content.ReadAsStringAsync();
                Logger.Info(String.Format("http response, url: {0}, type: {1}, body: {2}", url, requestType, responseBody));
                return responseBody;
            }
            else
            {
                throw new Exception(String.Format("HTTP請求失敗，狀態碼：{0}", response?.StatusCode));
            }
        }
        /// <summary>
        /// HTTP請求
        /// </summary>
        /// <param name="url"></param>
        /// <param name="jwt"></param>
        /// <param name="requestType"></param>
        /// <param name="data"></param>
        /// <param name="cancellationToken"></param>
        /// <returns></returns>
        /// <exception cref="Exception"></exception>
        public static async Task<string> HttpRequestAsync(string url, string jwt = null, HttpRequestType? requestType = HttpRequestType.GET, string data = null, CancellationToken cancellationToken = default)
        {
            try
            {
                // 忽略SSL驗證
                HttpClientHandler handler = new HttpClientHandler();
                handler.ServerCertificateCustomValidationCallback = (sender, cert, chain, sslPolicyErrors) => true;
                // HTTP客戶端
                using HttpClient client = new HttpClient(handler);
                // 設定JWT身份驗證頭
                if (!string.IsNullOrEmpty(jwt))
                {
                    client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", jwt);
                }
                // 構造請求內容
                StringContent content = new StringContent(string.Empty);
                if (!string.IsNullOrEmpty(data))
                {
                    content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json");
                }
                // 發起請求
                Logger.Info(String.Format("http request, url: {0}, type: {1}, body: {2}", url, requestType, data));
                HttpResponseMessage response = null;
                // 判斷請求型別
                switch (requestType)
                {
                    case HttpRequestType.GET:
                        response = await client.GetAsync(url, cancellationToken);
                        break;
                    case HttpRequestType.POST:
                        response = await client.PostAsync(url, content, cancellationToken);
                        break;
                    case HttpRequestType.PUT:
                        response = await client.PutAsync(url, content, cancellationToken);
                        break;
                    case HttpRequestType.DELETE:
                        response = await client.DeleteAsync(url, cancellationToken);
                        break;
                }
                // 檢查響應是否成功
                if (response?.IsSuccessStatusCode == true)
                {
                    // 讀取響應內容
                    string responseBody = await response.Content.ReadAsStringAsync();
                    Logger.Info(String.Format("http response, url: {0}, type: {1}, body: {2}", url, requestType, responseBody));
                    return responseBody;
                }
                else
                {
                    throw new Exception(String.Format("HTTP請求失敗，狀態碼：{0}", (int)response?.StatusCode));
                }
            }
            catch (OperationCanceledException ex)
            {
                throw new Exception(String.Format("HTTP請求失敗，請求已終止：{0}", ex.Message));
            }
            catch (Exception)
            {
                throw;
            }
        }
    }
}

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