WebApi實現代理Http請求

h5調用第三方api時候經常遇到不允許跨域的問題，用webapi實現一個代理http接口，方便進行跨域請求。

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Web.Http;
using YFAPICommon.Models;

namespace YFAPICommon.Controllers
{
    public class HttpInput
    {
        public string url { set; get; }
        public Dictionary<string,object> param { set; get; }
    }
    public class HttpProxyController : ApiController
    {
        public object doPost(HttpInput input)
        {
            if (string.IsNullOrWhiteSpace(input.url))
                return ReturnNode.ReturnError("url不能爲空");
            if (input.param == null)
                input.param = new Dictionary<string, object>();
            string result = Post(input.url,input.param);
            if (result != null)
            {
                try
                {
                    JObject obj = JsonConvert.DeserializeObject<JObject>(result);
                    return obj;
                }
                catch (Exception ex)
                {
                }
            }
            return result;
        }

        public object doGet(HttpInput input)
        {
            if (string.IsNullOrWhiteSpace(input.url))
                return ReturnNode.ReturnError("url不能爲空");
            if (input.param == null)
                input.param = new Dictionary<string, object>();
            string result = Get(input.url);
            if (result != null)
            {
                try
                {
                    JObject obj = JsonConvert.DeserializeObject<JObject>(result);
                    return obj;
                }
                catch (Exception ex)
                {
                }
            }
            return result;
        }

        private static string Post(string url, Dictionary<string, object> param)
        {
            using (HttpClient client = new HttpClient())
            {
                //請求超時
                //client.Timeout = new TimeSpan(5000);

                var httpContent = new StringContent(JsonConvert.SerializeObject(param));
                httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");

                var response = client.PostAsync(url, httpContent).Result;
                var responseValue = response.Content.ReadAsStringAsync().Result;
                if (response.StatusCode == System.Net.HttpStatusCode.OK)
                {
                    return responseValue;
                }

                return null;
            }
        }

        private static string Get(string url)
        {

            var request = (HttpWebRequest)WebRequest.Create(url);
            var response = (HttpWebResponse)request.GetResponse();
            var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
            if (response.StatusCode == System.Net.HttpStatusCode.OK)
            {
                return responseString;
            }

            return null;
        }
    }
}