WebApi实现代理Http请求

h5调用第三方api时候经常遇到不允许跨域的问题，用webapi实现一个代理http接口，方便进行跨域请求。

  

   

    

     

    
    

     

      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不能为空");
     
    
   

    

     

    
    

     
            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不能为空");
     
    
   

    

     

    
    

     
            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())
     
    
   

    

     

    
    

     

                  {
     
    
   

    

     

    
    

     
                //请求超时
     
    
   

    

     

    
    

     
                //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;
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

      }
     
    
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/101421833