记录HttpWebRequest辅助类

川长思鸟来 2021-09-19 19:26 362阅读 0赞

最近因为工作关系，需要通过HttpWebRequest去请求API，所有就写了个简单的辅助public sealed classHttpRequestHelper

![复制代码][copycode.gif]

{
            private static string USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.124 Safari/537.36";
            private static string ACCEPT = "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8";
            private static string CONTENT_TYPE = "application/x-www-form-urlencoded; encoding=UTF-8";
    
            /// <summary>
            /// 单例
            /// </summary>
            private static volatile HttpRequestHelper instance;
            private static object syncRoot = new object();
            private HttpRequestHelper() { }
    
            public static HttpRequestHelper Instance
            {
                get
                {
                    if (instance == null)
                    {
                        lock (syncRoot)
                        {
                            if (instance == null)
                            {
                                instance = new HttpRequestHelper();
                            }
                        }
                    }
    
                    return instance;
                }
            }
    
            /// <summary>
            /// Get请求
            /// </summary>
            /// <param name="queryString">url参数</param>
            /// <returns>json格式结果</returns>
            public string Get(string URL)
            {
                string ret = string.Empty;
                URL = URL.Replace("ACCESS_TOKEN", WxTokenHelper.Instance.Token);
                var request = CreateRequest("GET", URL);
                var response = request.GetResponse();
                Stream responseStream = response.GetResponseStream();
                StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8);
                ret = readStream.ReadToEnd();
                readStream.Close();
                return ret;
            }
    
            public string GetToken(string URL)
            {
                string ret = string.Empty;
                var request = CreateRequest("GET", URL);
                var response = request.GetResponse();
                Stream responseStream = response.GetResponseStream();
                StreamReader readStream = new StreamReader(responseStream, Encoding.UTF8);
                ret = readStream.ReadToEnd();
                readStream.Close();
                return ret;
            }
    
            /// <summary>
            /// Post请求
            /// </summary>
            /// <param name="URL">请求的URL</param>
            /// <param name="jsonData">json格式参数</param>
            /// <returns>json格式结果</returns>
            public string Post(string URL, string jsonData)
            {
                string ret = string.Empty;
                URL = URL.Replace("ACCESS_TOKEN", WxTokenHelper.Instance.Token);
                var request = CreateRequest("POST", URL);
    
                if (!string.IsNullOrWhiteSpace(jsonData))
                {
                    byte[] data = Encoding.UTF8.GetBytes(jsonData);
                    request.ContentLength = data.Length;
                    using (var requestStream = request.GetRequestStream())
                    {
                        requestStream.Write(data, 0, data.Length);
                    };
    
    
                    var response = request.GetResponse() as HttpWebResponse;
                    using (var responseStream = response.GetResponseStream())
                    {
                        using (var readStream = new StreamReader(responseStream, Encoding.UTF8))
                        {
                            ret = readStream.ReadToEnd();
                        }
                    }
                }
    
                return ret;
            }
    
            private HttpWebRequest CreateRequest(string method, string URL)
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
                request.Accept = ACCEPT;
                request.UserAgent = USER_AGENT;
                request.Method = method;
                request.ContentType = CONTENT_TYPE;
    　　　　     request.Proxy = null;
                return request;
            }
        }

![复制代码][copycode.gif]

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[copycode.gif]: /images/20210812/f77dc19fb65b43229efdfa6523672f94.png