gistfile1.cs

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using Newtonsoft.Json;
using System.Net.Http;

namespace HttpClientWrapper
{
    public static class HttpOperations<Type>
    {
        private static HttpClient client = new HttpClient();

        /// <summary>
        /// HttpGetを行う
        /// </summary>
        /// <param name="url">Getするurl</param>
        /// <returns>Getした結果</returns>
        public static async Task<Type> HttpGetAsync(string url)
        {
            try
            {
                var response = await client.GetAsync(url);
                return await ParseJson(await response.Content.ReadAsStringAsync());
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// サーバからファイルをダウンロードする
        /// </summary>
        /// <param name="url"></param>
        public static async Task<bool> HttpDownload(string url, string filename)
        {
            try
            {
                var response = await client.GetAsync(url);
                var file = await response.Content.ReadAsStreamAsync();
                var outputStream = new FileStream(filename, FileMode.Create);
                await file.CopyToAsync(outputStream);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }

        /// <summary>
        /// サーバに対してデータをPostする
        /// </summary>
        /// <param name="url">postするurl</param>
        /// <param name="content">postするデータ</param>
        /// <returns>サーバレスポンスとマッピングしたモデルインスタンス</returns>
        public static async Task<Type> HttpPostAsync(string url, HttpContent content)
        {
            try
            {
                var response = await client.PostAsync(url, content);
                return await ParseJson(await response.Content.ReadAsStringAsync());
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// HttpPutをする
        /// </summary>
        /// <param name="url">Putするurl</param>
        /// <param name="content">Putするデータ</param>
        /// <returns>結果のレスポンス</returns>
        public static async Task<Type> HttpPutAsync(string url, HttpContent content)
        {
            try
            {
                var response = await client.PutAsync(url, content);
                return await ParseJson(await response.Content.ReadAsStringAsync());
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// Jsonを決められた型に整形して返す
        /// </summary>
        /// <param name="json">jsonの文字列</param>
        /// <returns>jsonとマッピングしたモデルインスタンス</returns>
        private static async Task<Type> ParseJson(string json)
        {
            return await JsonConvert.DeserializeObjectAsync<Type>(json);
        }
    }
}